Suppose you wanted to dissolve 40.0 g NaOH in enough H2O to make 6.00 dm3 of solution

Answer:

D. All living things provides heat and light on Earth.

Explanation:

its the sun that does that

Answer:

option d.

Explanation:

all living things provides heat and light on Earth.

Answer: The correct name for the compound [tex]C_2I_3[/tex]  is, Dicarbon triiodide.

Explanation:

[tex]C_2I_3[/tex] is a covalent compound because in this compound the sharing of electrons takes place between carbon and iodine.. Both the elements are non-metals. Hence, it will form covalent bond.

The naming of covalent compound is given by:

The less electronegative element is written first.

The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.

If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.

Hence, the correct name for the compound [tex]C_2I_3[/tex]  is, Dicarbon triiodide..

The given question is incomplete. the complete question is : If 5.15 g[tex]Fe(NO_3)_3[/tex] is dissolved in enough water to make exactly 323 ml of solution, what is the molar concentartion of nitrate ion.

Answer:  The molar concentartion of nitrate ion is 0.195.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Given : 5.15 g of [tex]Fe(NO_3)_3[/tex] is dissolved

Volume of solution = 323 ml

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n= moles of solute

[tex]Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{5.15g}{242g/mol}=0.021moles[/tex]  

[tex]V_s[/tex] = volume of solution = 323 ml

[tex]Molarity=\frac{0.021\times 1000}{323}=0.065M[/tex]

As 1 M of [tex]Fe(NO_3)_3[/tex] gives 3 M of [tex]NO_3^-[/tex] ions.

Thus 0.065 M of [tex]Fe(NO_3)_3[/tex] gives  = [tex]\frac{3}{1}\times 0.065=0.195M[/tex] of [tex]NO_3^-[/tex] ions.

The molar concentartion of nitrate ion is 0.195.

Answer:

maile pani aii khojeko tmle sideko dekhya ani thicheko ani comment garya haha

Answer:

[tex]T_{eq}=28.9\°C[/tex]

Explanation:

Hello!

In this case, since it is observed that hot cadmium is placed in cold water, we can infer that the heat released due to the cooling of cadmium is gained by the water and therefore we can write:

[tex]Q_{Cd}+Q_{W}=0[/tex]

Thus, we insert mass, specific heat and temperatures to obtain:

[tex]m_{Cd}C_{Cd}(T_{eq}-T_{Cd})+m_{W}C_{W}(T_{eq}-T_{W})=0[/tex]

In such a way, since the specific heat of cadmium and water are respectively 0.232 and 4.184 J/(g °C), we can solve for the equilibrium temperature (the final one) as shown below:

[tex]T_{eq}=\frac{m_{Cd}C_{Cd}T_{Cd}+m_{W}C_{W}T_{W}}{m_{Cd}C_{Cd}+m_{W}C_{W}}[/tex]

Now, we plug in to obtain:

[tex]T_{eq}=\frac{37.60g*0.232\frac{J}{g\°C}*100.00\°C+25.00g*4.184\frac{J}{g\°C}*23.0\°C}{37.60g*0.232\frac{J}{g\°C}+25.00g*4.184\frac{J}{g\°C}}\\\\T_{eq}=28.9\°C[/tex]

NOTE: since the density of water is 1g/cc, we infer that 25.00 cc equals 25.00 g.

Best regards!

Answer:

average velocity for the time interval from t = 2 s to t = 4 s? ... fractional difference in the two methods when a steady wind blows along the car's route and the ... weight, but when the film reaches the drop, the drop's water suddenly ... boat, moving with constant velocity, that is 12 m from the point of impact when the key is.

Explanation:

ABOVE

The average acceleration of the sail boat is 0.083 m/s². Thus option d is correct.

Acceleration is defined as the rate of change of velocity of an object with respect to time.

It is a vector quantity.

Acceleration can also be defined as the velocity change rate over time, in terms of both speed and direction

Average acceleration is defined as the rate of change of velocity of an object for the particular interval of time.

Average acceleration can also be defined as the change in velocity divided by the time elapsed.

It is measured in meter per second.

Average acceleration =  Change in velocity / time

                                    =  5.5 - 3.0 / 30.0

                                    =  0.083 m / s²

Thus, the average acceleration of the sail boat is 0.083 m/s². Thus option d is correct.

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Your question is incomplete, but probably your complete question was

A sudden gust of wind increases the velocity of a sailboat relative to the water surface from 3.0m/s to 5.5m/s over a period of 30.0s. Using the formula a=change in velocity /t, what is the average acceleration of the sailboat?

•2.5m/s2

•1.2m/s2

•25m/s2

•0.083m/s2

Answer:

I

Explanation:

d

k

uhm....is there anything you need help with?

Answer:

3.746 g/mL

Explanation:

Mass of metal =  15.36 g

Initial Volume = 30.0 mL

Final Volume = 34.1 mL

Volume of metal = Final Volume - Initial Volume = 34.1 mL - 30.0 mL

Volume of metal = 4.1 mL

Density = ?

The relationship between the values is given as;

Density = Mass of metal / Volume of metal

Inserting the values;

Density = 15.36 / 4.1  = 3.746 g/mL

The density of the piece of metal is 3.746 g/ml.

Given the mass of metal is 15.36 g

The initial volume of a cylinder is 30.0 ml

The final volume after putting metal in it is 34.1ml

Step 1-  To find the volume:

The volume of metal = Final Volume – Initial Volume 30.0 mL

Volume of metal = 34.1 – 30.0 = 4.1 ml

Volume of metal = 4.1 mL

Step 2- Find the Density:

Density = Mass of metal is divided by the Volume of metal

[tex]\bold{Density = \dfrac{15.36 }{4.1} =3.746 g/ml}[/tex]  

Thus, the density is 3.746 g/ml.

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Answer:

Fe2O3,  Fe2S3 and FeCl3

Explanation:

The formular shows the number of atoms of element present in the compound. The number of atoms in turn depends on the charges. The goal is to have a neutral compound with oxidation number of zero.

Oxide:

Iron(Fe) has oxidation number (O.N) of +3, oxygen has O.N of -2. The formular with a balanced (Charge = 0) O.N number is; Fe2O3

Sulphide:

Iron(Fe) has oxidation number (O.N) of +3, sulphur has O.N of -2. The formular with a balanced (Charge = 0) O.N number is; Fe2S3

Chloride:

Iron(Fe) has oxidation number (O.N) of +3, chlorine has O.N of -1. The formular with a balanced (Charge = 0) O.N number is; FeCl3

Answer:

B) 2

Explanation:

There are two significant figures in given measurement,

2, 0

Significant figures:

1= The given measurement have four significant figures 1534.

2= All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

3= Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.

4= Zero between the non zero digits are consider significant like 107 consist of three significant figures.

5= The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.

Answer:

[tex]P=34.8atm[/tex]

Explanation:

Hello!

In this case, since the tank has a constant volume as well as temperature, we would be able to compute the resulting pressure via:

[tex]P=\frac{n_TRT}{V}[/tex]

Whereas the total moles are computed by adding the moles of each gas as shown below:

[tex]n_{CH_4}=250gCH_4*\frac{1molCH_4}{16.05gCH_4}=15.6molCH_4\\\\n_{CO_2}=190g CO_2*\frac{1molCO_2}{44.01gCO_2}=4.32molCO_2\\\\n_T= 15.6molCH_4+4.32molCO_2\\\\n_T=19.9mol[/tex]

Thus, we plug in the total pressure, temperature and volume to get the resulting pressure:

[tex]P=\frac{19.9mol*0.08206\frac{atm*L}{mol*K}*298K}{14.0L}\\\\P=34.8atm[/tex]

Best regards!

AgCl⇒ the precipitate

Given

Reaction

2AgNO₃+CaCl₂⇒2AgCl+Ca(NO₃)₂

Required

The precipitate

Solution

Solubility rules :

soluble compound  :

All compounds of NO₃⁻ and C₂H₃O₂⁻

Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺

So AgCl⇒ the precipitate

Ca(NO₃)₂⇒aqueous

Answer:

Element is made from same type of atoms

While atom is present in element made up of different particles like proton neutrons electron etc

Explanation:

Answer:

C. 96,657 Pa, 966 millibar, 725 Torr

Explanation:

The pressure of 725 mmHg in Pa, millibars, and Torr is 96,657 Pa, 966 millibar, 725 Torr. Hence option C is correct.

Pressure is defined as the force that is applied perpendicularly to an object's surface in relation to the area that it is dispersed over. Pressure can actually be a very good thing. Stress only occurs and has a fully negative impact when it continues to grow and that sensation of serenity and order is replaced with one of being out of control.

Given pressure = 725 mmHg

1 mmHg = 133.32 Pa

725 mmHg = 133.32 x 725 Pa

                  = 96,657 Pa

1 mmHg = 1.333 millibar

725 mmHg = 725 x 1.333 millibar

                   = 966 millibar

1 mmHg = 1 torr

725 mmHg = 725 Torr

Thus, the pressure of 725 mmHg in Pa, millibars, and Torr is 96,657 Pa, 966 millibar, 725 Torr. Hence option C is correct.

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Answer:

Cell division.

Explanation:

Answer:

Reflection

Explanation:

The light from Earth's surface, reflected back towards the Moon, can illuminate it all the same. This is why, when the Moon is in a crescent phase, you can still see features on the dark portion of the Moon: we call this reflected, illuminating light the phenomenon of Earthshine.

Number of particles inside a sugar bowl = 4.4 x 10²³

Given

The molar mass of sugar = 342.3 g/mol

mass of sugar = 250 g

Required

Number of particles

Solution

1 mol = 6.02 x 10²³ particles

mol of sugar :

[tex]\tt mol=\dfrac{mass}{molar~mass}[/tex]

mol = 250 g : 342.3 g/mol = 0.73 mol

Number of particles :

N = n x No

N = 0.73 x 6.02 x 10²³

N = 4.39 x 10²³ ≈ 4.4 x 10²³

Answer:

Neutrons

Explanation:

Subatomic particles are components atoms, and they include protons, electrons and neutrons. In different isotopes of an atom, the number of neutrons that the atom contains is what changes.

I hope this helps!

Answer:

"The elements are arranged in seven horizontal rows,called periods or series,and 18 vertical columns,called Groups."

Explanation:

Risk*

Answer:

0.670 mol

Explanation:

Step 1: Write the balanced reaction for the decomposition of alumina

2 Al₂O₃ ⇒ 4 Al + 3 O₂

Step 2: Calculate the moles corresponding to 34.2 g of Al₂O₃

The molar mass of Al₂O₃ is 101.96 g/mol.

34.2 g × 1 mol/101.96 g = 0.335 mol

Step 3: Calculate the moles of Al produced from 0.335 moles of Al₂O₃

The molar ratio of Al₂O₃ to Al is 2:4.

0.335 mol Al₂O₃ × (4 mol Al/2 mol Al₂O₃) = 0.670 mol Al

Answer:

c

Explanation:

The ocean water transfers thermal energy to the area, warming the equatorial waters. Therefore, the correct option is option C.

In physics and engineering, the phrase "thermal energy" is thrown around in a lot of different situations. It can relate to a variety of distinct physical notions. They include radiation and a body of matter's inherent energy, also known as enthalpy.

Through means besides just thermodynamic work or the movement of matter, including such conduction, radiation, or friction, heat is energy that is moved into or out of a thermodynamic system. Heat is not a property of any single system or something that is "contained" within it; rather, it is a quantity that is transmitted across systems. Internal energy and enthalpy, on the other hand, are characteristics of a single system. The ocean water  transfers thermal energy to the area, warming the equatorial waters.

Therefore, the correct option is option C.

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Answer:

6200 meters

Explanation:

To convert from km to m you have to multiply the number by a thousand

Answer:

6.2×10^3 m

Explanation:

6.20×1000=6200m

In scientific notation 6200 = 6.2×10^3

Answer: The mole fraction of chloroform in this solution is 0.41

Explanation:

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

a) moles of [tex]CHCl_3[/tex]

[tex]\text{Number of moles}=\frac{49g}{119g/mol}=0.41moles[/tex]

b) moles of [tex]CH_3COBr[/tex]

[tex]\text{Number of moles}=\frac{73g}{123g/mol}=0.59moles[/tex]

To calculate the mole fraction, we use the formula:

[tex]\text{Mole fraction of a component}=\frac{\text{Moles of the component}}{\text{total moles}}[/tex]

[tex]\text{Mole fraction of chloroform}=\frac{\text{Moles of chloroform}}{\text{total moles}}=\frac{0.41}{0.41+0.59}=0.41[/tex]

The mole fraction of chloroform in this solution is 0.41

Answer:

62.9%

Explanation:

Step 1: Given data

Step 2: Calculate the mass lost of water

We will use the following expression.

mH₂O = mNa₂CO₃.xH₂O - mNa₂CO₃

mH₂O = 71.5 g - 26.5 g = 45.0 g

Step 3: Calculate the percent of water in the hydrate sodium carbonate

We will use the following expression.

%H₂O = mH₂O / mNa₂CO₃.xH₂O × 100%

%H₂O = 45.0 g / 71.5 g × 100%

%H₂O = 62.9%

Answer:

V = 93.0 L

Explanation:

Hello!

In this case, when computing the PVT properties for an ideal gas, we need to use the following equation:

[tex]PV=nRT[/tex]

In such a way, for 2.5 x 10²⁴ molecules of chlorine at STP (273.15 K and 1.00 atm) we first need the moles based on the Avogadro's number:

[tex]n = 2.5x10^{24}molec*\frac{1mol}{6.022x10^{23}molec} = 4.15mol[/tex]

Now, we solve for volume on the ideal gas equation to obtain:

[tex]V=\frac{nRT}{P}[/tex]

So we plug in and get:

[tex]V=\frac{4.15mol**0.08206\frac{atm*L}{mol*K}*273.15K}{1.00atm}\\\\V=93.0L[/tex]

Best regards!

Answer:

Vav=d/t

Explanation:

Because the question already gave d=90m and t=20s. Because the car is the thing that can not travel the same distances at the same times.So the equation is V[tex]\\_{av}[/tex]=[tex]\frac{d}{t} \\[/tex]

Answer:

4-Methyl-1-pentene

Explanation:

According to  the International Union of Pure and Applied Chemistry (IUPAC), IUPAC nomenclature of organic chemistry is defined as the system of naming organic chemical compounds.

There are certain rules for naming organic chemical compounds as per IUPAC. The name of given (CH3)2CHCH2CH=CH2 will be based on the same rules.

4-Methyl-1-pentene is the name of this chemical, as methyl is in 4th carbon position, Pent for 5 carbon chain and -ene (suffix) for one double bond).

Hence, the correct answer is "4-Methyl-1-pentene".