What is the answer? Please

What Is The Answer? Please

Answers

Answer 1

Answer:

To instill a high degree of personal honor, self-reliance, and confidence in each cadet by presenting a military environment in which cadets will be forced to rely upon themselves and their shipmates to study, work, and learn.


Related Questions

What is an example of a physical change?

A. having less ash than the paper that was burned to form it
B. ice forming and then melting back into water
C. rust having a different identity than the iron it forms on
D. the irreversible reaction of vinegar and baking soda

What one would you guys choose?

Answers

Answer:

B is correct answer

Explanation:

Answer:

B.

Explanation:

I have a buddy who recycles electronics, and isolates metals from the connector pins electrical boards. He isolates gold, for example, and purifies it the best he can, then sells it along with his other scrap metal. This last go around he was able to isolate 3.00 g of Au with a process he claims results in a 80.0% yield. If he is correct, what was his theoretical yield

Answers

Answer:

Theoretical yield = 3.75g

Explanation:

Percent yield is defined as one hundred times the ratio between actual yield and theoretical yield. The expression is:

Percent yield = Actual Yield / Theoretical Yield * 100

In the problem, your actual yield was 3-00g.

Percent yield is 80.0%.

Solving for theoretical yield:

80% = 3.00g / Theoretical yield * 100

Theoretical yield = 3.00g / 80.0% * 100

Theoretical yield = 3.75g

A solution contains 3.95 g of carbon disulfide (CS2, molar mass = 76.13 g/mol) and 2.43 g of acetone ((CH3)2CO, molar mass = 58.08 g/mol). The vapor pressure of pure carbon disulfide and acetone at 35 oC are 515 torr and 332 torr, respectively. Assuming ideal solution behavior, calculate the vapor pressure of each of the components and the total vapor pressure above the solution. The total vapor pressure above the solution at 35 oC was experimentally determined to be 645 torr. Is the solution ideal? If not, indicate whether the solution deviates from Raoult’s law in a positive or negative manner.

Answers

Answer:

Psol = 433 torr

The solution is not ideal and the solution deviates from Raoult's law in a positive manner

Explanation:

The vapout pressure of a solution can be obtained using Raoult's law:

Psol = P°A* XA + P°B*XB

Where Psol is vapour pressure of solution

P° is vapour pressure of pure substance

X is mole fraction

As we have vapour pressure of pure carbon disulfide and acetone we need to find mole fraction of each compound to solve the vapour pressure of the solution:

Moles carbon disulfide:

3.95g CS₂ * (1mol / 76.13g) = 0.05188 moles

Moles acetone:

2.43g acetone * (1mol / 58.08g) = 0.04184 moles

Mole fraction of CS₂:

0.05188 moles / (0.05188mol + 0.04184mol) =

0.5536

Mole fraction acetone:

1 = X(CS₂) + X(Acetone)

X(Acetone) = 1 - 0.5536 = 0.4464

Solving for vapour pressure of the solution:

Psol = 515torr*0.5536 + 332torr*0.4464

Psol = 433 torr

As the experimental vapor pressure was 645torr > 433 torr (Theoretical vapor pressure), the solution is not ideal and the solution deviates from Raoult's law in a positive manner

An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?

Answers

the mass number of the atom is 39

A peregrine falcon dives 176 meters through the air in 8 seconds. Its
average speed during the dive is 22 m/s. *

Answers

Answer:

This question is asking to find the average speed during the dive. The answer is 22m/s.

Explanation:

Average speed of a substance can be calculated knowing it's distance over a particular amount of time.

The formula for average speed is:

Average speed (s) = Distance (d) / time (t)

In the case of this question where A peregrine falcon dives 176 meters through the air in 8 seconds, the distance of the falcon is 176m, while the time is 8s. Hence;

Average speed = 176/8

Average speed = 22

Therefore, the average speed of the falcon diver is 22m/s.

The density of ice is 0.917 g/cm3. What volume of ice does 52.75 g occupy?

Answers

Answer:

The answer is

57.52 mL

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} [/tex]

From the question

mass of ice = 52.75 g

density = 0.917 g/cm³

The volume of the ice is

[tex]volume = \frac{52.75}{0.917} \\ = 57.52453653[/tex]

We have the final answer as

57.52 mL

Hope this helps you

ZnO
Express your answer as an ion?

Answers

Answer:

[tex]Zn^{2+}[/tex]

Explanation:

Hello,

In this case, since metals tend to lose electrons, they usually become the cations when chemical compounds are formed so the other element should be negative to allow their interactions to take place.

In such a way, since oxygen is known to be negatively charged as -2 and their subscripts are both 1, we infer that the oxidation state of zinc is +2, therefore, it is written as an ion as follows:

[tex]Zn^{2+}[/tex]

Best regards.


Calculate the mass (in grams) of 0.473 mol of titanium

Answers

Explanation:

n=given mass ÷molar mass

make given mass become the subject of the formula by

multiplying the molar mass on both sides of the equation.

n=0.473mol

given mass=??

molar mass=48

therefore,given mass=n×molar mass

=0.473×48

=22.704grams

mass in grams is 22.704grams

The mass (in grams) of 0.473 mol of titanium is 22.6 grams.

We have some specific amount of moles of titanium.

We have to calculate the mass of given sample of titanium.

What is Titanium ?

Titanium is a chemical element with the symbol Ti and atomic number 22. It is found in nature only as an oxide.

According to the question -

Moles of titanium - 0.473 moles.

Mass of 0.473 moles of titanium =

0.473 moles titanium x (47.87 grams titanium / 1 mole) = 22.6 grams

Hence,  the mass (in grams) of 0.473 mol of titanium is 22.6 grams.

To solve more questions on Mole concept, visit the link below-

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15.0 g of water is heated from 5 °C up to 37 °C. How much energy is absorbed by
the water? (The specific heat of liquid water is 4.184 J/g °C.)

Answers

Answer:

See the answer

1) 15.0 g of water is heated from 5 °C up to 37 °C. How much energy is absorbed by the water? (The specific heat of liquid water is 4.184 J/g°C.)

2)How many joules of energy is required to bring a five-pound (1 pound = 454 g) bag of ice from its freezer temperature at -20.0°C up to 0°C? The specific heat of ice is 2.10 J/g×°C.

3) A 50.0 mg tissue sample is taken from a patient for diagnosis. While waiting for testing, the sample is stored in a -80.0°C freezer. How much energy is released when the sample is cooled from 20.0°C down to the freezer temperature? You may assume the specific heat of the tissue sample is 3.47 J/g×K.

Which ketone in each pair is more reactive?
a. 2-heptanone or 4-heptanone,
b. bromomethyl phenyl ketone or chloromethyl phenyl ketone

Answers

Answer:

a. 2-heptanone is more reactive than 4-heptanone

b. chloromethyl phenyl ketone is more reactive than bromomethyl phenyl ketone

Explanation:

The reactivity of the carbonyl compound (ketone ) is affected by the steric effect. The steric effect is a hindrance that occurs in the structure or reactivity of a molecule, which is affected by the physical size and the proximity of the adjacent parts of the molecule.

Between 2-heptanone or 4-heptanone, 2-heptanone is more reactive than 4-heptanone. This is because 2-heptanone is less affected by the steric hindrance, unlike the 4-heptanone.

Similarly, the reactivity of the carbonyl compound (ketone) is also affected by the polarity on the carbon compound, which is associated with how electronegative the substituent attached is to the carbonyl compound. From the periodic table, the electronegativity of the Halogen family decreases down the group. Therefore chlorine is more electronegative than bromine.

As such, chloromethyl phenyl ketone is more reactive than bromomethyl phenyl ketone.

what is the Si base unit of mass?
what is the base unit/1000 of mass?
what is the base unit×1000 of mass?

what is the base unit of liquid volume? what is the base unit/1000?
what is the base unit×1000?

what is the base unit of temperature? what is the base unit/1000?
what is the base unit×1000?​

Answers

The SI unit of temperature is the kelvin (K), which spans the same temperature change as the degree Celsius. The Kelvin scale is a thermodynamic scale, meaning that its zero point is at absolute zero rather than the freezing point of water. The second reference point for this scale as it is currently defined is the triple point of water, which is a unique point on the phase diagram of water (a specific combination of pressure and temperature) where ice, liquid water and water vapor are all in equilibrium. The triple point is assigned the temperature of 273.16 K.

The old centigrade scale used the freezing and boiling temperatures of water as its reference points, with one degree centigrade equal to 1/100 of the temperature span between the freezing and boiling points of water. The definition of the Kelvin scale was chosen to make the kelvin the same size as the centigrade degree.

The Celsius scale is defined in terms of the Kelvin scale but is equivalent to the old centigrade scale, which it replaces. It is convenient for reporting weather and cooking temperatures and so on, but is not particularly useful for scientific purposes. For instance, the behavior of gases which approximate ideal gases is such that at zero degrees C they experience a volume change of 1/273 for a one degree change in temperature. This observation provided one of the first indications for the value of absolute zero.

When using the ideal gas law:

PV = nRT

where P is pressure

V is volume

n is the quantity of gas in moles

R is a constant

T is the temperature

it is necessary to use a thermodynamic scale, usually Kelvin.

Another thermodynamic scale, the Rankine scale, has a relationship to the Fahrenheit temperature scale analogous to that between the Kelvin and Celsius scales.

Estimate the volume of the football. Compare the football to the table tennis balls by dragging the football over the
table tennis balls to assess its size.
The mass of the tennis balls are 2.7(g)

Answers

Answer:

4,300

Explanation:

4,300..

Hope this helps ..

What is the mass of 87.94 mL of ethanol, which has a density of 0.79 g/mL?

Answers

Answer:

The answer is

69.47 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume of ethanol = 87.94 mL

density = 0.79 g/mL

The mass of ethanol is

mass = 87.94 × 0.79

mass = 69.4726

We have the final answer as

69.47 g

Hope this helps you

6.(01.05 LC) Which states of matter change shape when moved?(2 points) Gases and solids Liquids and gases Liquids, solids, and gases Solids and liquids​

Answers

Answer:Gases and solids , Solids and liquids​

Explanation:

A solid has a definite shape while liquids and gases take the shape of the container in which they are found .

Hence when a substance changes it's state from gas to solid or solid to liquid, it's shape automatically changes as explained above.

6.300x10-5 – 7.200x10-3

Answers

Answer:

-17

Explanation:

6300/1000×10-5-7200/1000×10-3

63000/1000-5-72000/1000-3

63-5-72-3

-17

the coefficient is -7.137 but i’m not sure what the exponent is, i’m sorry :/

28 Which of the following equations does not represent a redox reaction?
A
B
с
D
2AgBr (s) → 2Ag (s) + Br2 (g)
Cu2+ (aq) + Zn (s) → Cu (s) + Zn2+ (aq)
2Fe (s) + 3Cl2 (9) ► 2FeCl3 (s)
MgO (s) + 2HCl (aq) → MgCl2 (aq) + H20 (1

Answers

Answer:

The answer is D. In the reactions A,B and C the reactants undergo changes in oxidation number. And also the reaction D is an acid_base neutralization reaction.


An object is a regular, rectangular, solid with dimensions of 2 cm by 3cm by 2cm. It has a
mass of 24 g. Find its density.

Answers

Answer:

2

Explanation:

Density = mass/volume

m=24

v=2*3*2=12

24/12=2

Answer:

[tex]\boxed {\tt d= 2 \ g/cm^3}[/tex]

Explanation:

Density can be found using the following formula.

[tex]d=\frac{m}{v}[/tex]

where [tex]m[/tex] is the mass and [tex]v[/tex] is the volume.

We know the mass is 24 grams. We must find the volume.

Since it is a rectangle, the volume can be found using the following formula.

[tex]v=l*w*h[/tex]

The length is 2 centimeters, the width is 3 centimeters and the height is 2 centimeters.

[tex]v= 2 \ cm * 3 \ cm * 2\ cm[/tex]

[tex]v= 6 \ cm^2 * 2\ cm[/tex]

[tex]v= 12 \ cm^3[/tex]

Now we know the volume, and can substitute it into the density formula.

[tex]d=\frac{m}{v}[/tex]

[tex]m= 24 \ g\\v= 12 \ cm^3[/tex]

[tex]d=\frac{24 \ g}{12 \ cm^3}[/tex]

[tex]d= 2 \ g/cm^3[/tex]

The density is 2 grams per cubic centimeter.

Which of the reactions are spontaneous (favorable)?
A. 2Mg(s) + O2(g) rightarrow 2MgO (s) delta G = - 1137 kJ / mol
B. NH3(g) + HCl(g ) rightarrow NH4Cl(s) delta G = - 91.1 kJ / mol
C. AgCl(s) rightarrow Ag+ (aq) + Cl-[aq) delta G = 55.6 kJ / mol
D. 2H2(g) + O2(g) rightarrow 2H2O(g) delta G= 456 kJ / mol
E. C(s) + H2O(t) rightarrow CO(g) + H2(g) delta G = 90.8 kJ / mol
F. CH4(g) + 2O2(g) rightarrow CO2(g) + 2H2O(t) delta G = -820 kJ / mol
A. Reaction A.
B. Reaction B.
C. Reaction C.
D. Reaction D.
E. Reaction E.
F. Reaction F.

Answers

Answer: Reactions: A, B and F

Explanation: Gibbs Free Energy, symbol G, combines Enthalpy (sum of internal energy) and Entropy (measure of how much the energy of atoms and molecules become spread out in a process).

The change in free energy (ΔG) is the sum of enthalpy and the product of temperature and entropy of the system.

With free energy, it is possible to determine if a reaction is spontaneous, i.e., happens wthout external energy, or non-spontaneous.

If ΔG is negative, reaction is spontaneous. If ΔG is positive, reaction is non-spontaneous.

Analysing each ΔG of the reactions above, reactions A, B and F's Gibbs Free energy are negative, so these 3 are spontaneous.

A ratio that compares the length and width of a garden is what type of model?
A. Physical
B. Conceptual
C. Computer
D. Mathematical

Answers

D. Mathematical is your answer

Answer:

D. Mathematical

Explanation:

Where did I go wrong? I know the 2.58 is the right answer but where did I go wrong in my work? Please help!!

Answers

Answer: See below

Explanation:

In this problem, conversion factors are very important. In the second conversion, you wrote 1 kg=0.001 g. This is incorrect. It should be 1 kg=1000g. Otherwise, the rest is correct. Make sure to have correct conversions. The answer will be correct.

A state of dynamic equilibrium, Ag2CO3(s) 2Ag^+(aq) + CO3^2-, exists in solution.
What shift occurs in the equilibrium if HCl (aq) is added to the system? Explain please

Answers

Answer:

The equilibrium will shift to the right producing more Ag⁺ and CO₃²⁻

Explanation:

In the equilibrium:

Ag₂CO₃(s) ⇄ 2Ag⁺(aq) + CO₃²⁻(aq)

The change in concentration of Ag⁺ or CO₃²⁻ will shift the equilibrium

The addition of HCl(aq) (Dissociates in H⁺ and Cl⁻ ions) produce the formation of AgCl. The reaction is:

Ag⁺(aq) + Cl⁻(aq) ⇄ AgCl(s)

That means the addition of HCl decrease concentration of Ag⁺.

Based on LeChatelier's principle: As the Ag⁺ decreases, the equilibrium will decrease amount of Ag₂CO₃ producing more Ag⁺ and CO₃²⁻. That is:

The equilibrium will shift to the right producing more Ag⁺ and CO₃²⁻

Jack has a rock. The rock has a mass of 14 g and a volume of 2 cm3. What is the density of the rock? * 0 7 ml O 28 g/cm3 07 g/cm3 O 1/7 g/cm3 ​

Answers

Answer:

The answer is

7.0 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass of rock = 14 g

volume = 2 cm³

The density of the rock is

[tex]density = \frac{14}{2} \\ [/tex]

We have the final answer as

7.0 g/cm³

Hope this helps you

Be sure to answer all parts. Calculate the mass of each product formed when 70.76 g of diborane (B2H6) reacts with excess water: B2H6(g) + H2O(l) → H3BO3(s) + H2(g) [unbalanced] Mass of H3BO3: g Mass of H2: g

Answers

Answer:

A. 313.37 g of H3BO3.

B. 30.33 g of H2.

Explanation:

We'll begin by writing a balanced equation for the reaction. This is given below:

B2H6 + 6H2O → 2H3BO3 + 6H2

Next, we shall determine the mass of B2H6 that reacted and the masses of H3BO3 and H2 produced from the balanced equation equation. This can be obtained as follow:

Molar mass of B2H6 = (2×11) + (1×6) = 22 + 6 = 28 g/mol

Mass of B2H6 from the balanced equation = 1 × 28 = 28 g

Molar mass of H3BO3 = (1×3) + 11 + (3×16) = 3 + 11 + 48 = 62 g/mol

Mass of H3BO3 from the balanced equation = 2 × 62 = 124 g

Molar mass of H2 = 2×1 = 2 g/mol

Mass of H2 from the balanced equation = 6 × 2 = 12 g

From the balanced equation above:

28 g of B2H6 reacted to produce 124 g of H3BO3 and 12 g of H2.

A. Determination of the mass of H3BO3 produced from the reaction.

This can be obtained as follow:

From the balanced equation above,

28 g of B2H6 reacted to produce 124 g of H3BO3.

Therefore, 70.76 g of B2H6 will react to produce = (70.76 × 124)/28 = 313.37 g of H3BO3.

Therefore, 313.37 g of H3BO3 were obtained from the reaction.

B. Determination of the mass of H2 produced from the reaction.

This can be obtained as follow:

From the balanced equation above,

28 g of B2H6 reacted to produce 12 g of H2.

Therefore, 70.76 g of B2H6 will react to produce = ((70.76 × 12)/28 = 30.33 g of H2.

Therefore, 30.33 g of H2 were obtained from the reaction.

Complete the autoionization reaction for water.
H2O + H2O

Answers

Answer:

Self ionization and self dissociation both are the process of ionization of the water.

Explanation:

The ionization process occur in pure water. This process occur when water is in aqueous form, where the water molecules like H2O will deprotonates and to form a hydroxide ions OH-.

It immediately protonates another molecule with water such as H+. It makes hydronium such as H3O+. It is also called auto protolyzes.

Such as an example:

H2O +H2O = H3O+ + OH-

The complete equation for the autoionization of water is

H₂O + H₂O ⇌ H₃O⁺ + OH⁻

From the question,

We are to complete the autoionization reaction for water

First, we will explain what is meant by autoionization reaction of water

Autoionization reaction of water also known as self-ionization of water is an ionization reaction in pure water or in an aqueous solution, in which a water molecule, H₂O, deprotonates to become a hydroxide ion, OH⁻. The proton, H⁺, immediately protonates another water molecule to form hydronium, H₃O⁺.

The equation for the reaction is

H₂O + H₂O ⇌ H₃O⁺ + OH⁻

Hence, the complete equation for the autoionization of water is

H₂O + H₂O ⇌ H₃O⁺ + OH⁻

Learn more here: https://brainly.com/question/954785

i am timed please help

Answers

Answer:

mixture

Explanation:

there was leftover components meaning there was something mixed into the liquid

The elemental analysis of an organic solid extracted from gum arabic showed that it contained 40.0% C, 6.7% H, and 53.3% O. A solution of 0.650 g of the solid in 27.8 g of the solvent diphenyl gave a freezing point depression of 1.56 °C. Calculate the molar mass and determine the molecular formula of the solid (kf for diphenyl is 8.00 °C/m). To earn full credit, clearly show your work with units and proper significant figures

Answers

Answer:

The molar mass of the organic solid is 119.9g/mol.

The molecular formula of an organic solid is C4H8O4

Explanation:

Step 1

We find the Molar mass

From the above question, we are given:

A solution of 0.650 g of the solid in 27.8 g of the solvent diphenyl gave a freezing point depression of 1.56 °C. Calculate the molar mass and determine the molecular formula of the solid (kf for diphenyl is 8.00 °C/m)

A freezing point depression = 1.56 °C.

Mass of organic solid= 0.650 g

Mass of diphenyl = 27.8 g

Converting to kilograms

1000g = 1kg

27.8g =

Cross Multiply

= 27.8g × 1 kg/1000g

= 0.0278kg

Boiling point constant = 8.00 °C/m

Molar mass of the organic compound = Boiling point constant × Mass of solid /Freezing point depression × Mass of diphenyl

Molar mass of the organic compound =

8.00 °C/m × 0.650g/1.56°C × 0.0278kg

= 5.2 g°C/m ÷ 0.043368 g°C

= 119.9040767 g/mol

Approximately = 119.9 g/mol

Step 2

Find the Molecular formula

Molecular formula = CxHyOz

Let x = Carbon, y = Hydrogen, z = Oxygen

For x = Carbon

Atomic mass of Carbon = 12.01078

x = % of Carbon in the compound × Molar mass of the organic compound/atomic mass of Carbon

x = 40% × 119.9 g/mol / (12.01078

x = 3.99

x = Approximately = 4

For y = Hydrogen

Atomic mass of Hydrogen = 1.007947

y = % of Hydrogen in the compound × Molar mass of the organic compound/Atomic mass of Hydrogen

x = 6.7% × 119.9 g/mol) / 1. 007947

x = 7.97

x is Approximately = 8

For z = Oxygen

Atomic mass of Oxygen = 15.99943

z = % of Oxygen in the compound × Molar mass of the organic compound/Atomic mass of Oxygen

z = 53.3% × 119.9 g/mol /15.99943

z = 3.99

z is approximately ≈ 4

Therefore,

The molar mass of the organic solid is 119.9 g/mol.

The molecular formula of an organic solid is C4H8O4

How do the coefficients in a balanced equation compare quantities of two
substances?
O A. The ratio of the coefficients equals the ratio of the masses of the
substances
O B. The sum of the coefficients of the reactants equals the sum of the
products
O C. The ratio of the substances' coefficients equals the ratio of their
number of moles.
OD. The coefficient of the reactant tells how many product molecules
will form.

Answers

Answer:

C. The ratio of the substances coefficients equal the ratio is the number of moles

Explanation:

The ratio of the substances' coefficients equals the ratio of their

number of moles. Hence, option C is correct.

What are moles?

A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Mole ratios are used as conversion factors between products and reactants in many chemistry problems.

The mole ratio may be determined by examining the coefficients in front of formulas in a balanced chemical equation.

Also known as the mole ratio is also called the mole-to-mole ratio.

Hence, option C is correct.

Learn more about moles here:

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Chlorine could combine with _ to gain the extra electron it needs to stabilize its outer shell
outer shell.
A. helium
B. sulfur
C. hydrogen
D. none of these

Answers

Answer:

C,  hydrogen.

Explanation:

The correct answer is C hope this helps :)

What is a single covalent bond?

Answers

Answer: Single Covalent Bonds

Hydrogen and chlorine coming together is an example of a single covalent bond. Two hydrogen atoms will also come together to form a single covalent bond, as will two chlorine atoms. In these examples, each individual atom has just one unpaired electron to share with the other atom.

A Little Backstory I Guess: In chemistry, a single bond is a chemical bond between two atoms involving two valence electrons. That is, the atoms share one pair of electrons where the bond forms. Therefore, a single bond is a type of covalent bond.

sorry its so long :/ hope this even relatively helps...

Which of the alkyne addition reactions below involve(s) an enol intermediate?
1) halogenation.
2) hydrogen in the presence of a metal catalyst.
3) hydroboration/oxidation.
4) none of the above.

Answers

It is hydroboration/oxidation

The correct answer is (3): hydroboration/oxidation.

Hydroboration/oxidation of alkynes involve an enol intermediate.

An intermediate is a specie that occurs along the steps of a non-elementary reaction but does not appear among the products.

Hydroboration refers to the reaction of borane (BH3) with alkyne. The addition of borane to an alkyne passes through an enol intermediae and the same also goes for oxidation of an alkyne.

Hence, hydroboration/oxidation are alkyne addition reactions that involve enol intermediate. The mechanism of hydroboration is shown in the image attached.

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