Answers
Answer:
The Relationship between Pressure and Volume: Boyle's Law
As the pressure on a gas increases, the volume of the gas decreases because the gas particles are forced closer together. Conversely, as the pressure on a gas decreases, the gas volume increases because the gas particles can now move farther apart
Related Questions
Hydrogen has a melting point of -259 °C, and a boiling point of -253 °C. Its density at liquid state is 0.07 g/cm³. What is the physical state of Hydrogen at -250 °C? Explain your answer.
Answers
Answer:
Explanation:
Remark
-250, if you can believe it, is actually warmer than - 253. At -250 the hydrogen has gone through a phase change (a phase change means that it has gone from a liquid to a gas).
From here on as far as you are concerned, the hydrogen will stay as a gas. Later on, if all other things remain constant, you will learn that hydrogen can do some very strange things.
What is the difference between a heterogenous and a homogenous mixture?
Answers
There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas.
Hope this helped :)
If 4.80 mol Ca mixed with 2 mol N2, which is the limiting reactant? 3Ca (s) + N2 (g) Ca3N2 (s)
Answers
Balance the equation for a half-reaction that occurs in acidic solution. Use e− as the symbol for an electron.
MnO_{4}^{-} -> MnO_{2}
Answers
The balanced half reaction equation is MnO4^- + 4H^+ ------>MnO2 + 2H2O + 3e
What is a redox reaction?The term redox reaction has to do with a reaction in which there is a loss or gain of electrons. In this reaction, one specie accepts electrons while another specie looses electrons.
The balanced half reaction equation in acid is; MnO4^- + 4H^+ ------>MnO2 + 2H2O + 3e
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A student boils water in an electric kettle for 20 minutes. Using the same mains supply, he wants to reduce the boiling time of water. To do so, should he increase or decrease the length of the heating element? Justify your answer.
Answers
Answer:
The student needs to increase the length of the heating element
Explanation:
Increasing the length of the heating elements helps to increase the surface area of the heating elements which allows for more water to come in contact with the heating element
Which action would shift this reaction away from solid silver chloride and toward the dissolved ions
Answers
What mass, in grams, of sodium sulfate is needed to make 234.9 g of a 1.7 % (m/m) aqueous solution of sodium sulfate?
Answers
Answer:
I think its this 4.125 g Na2SO4 or this 4.125 g
Hello, do these calculations using table 1 look correct? Thank you
Table 1.
Sugar (Sucrose) Data
Mass of unchewed gum 3.7 (g)
Mass of chewed gum 2.0 (g)
Mass of sugar 1.7 (g)
Percent sugar
46%
Post-Lab Questions
1. What is the percent sugar? Show your calculations.
mass of sugar (1.7) ÷ mass of unchewed gum ( 3.7) × 100 = 45.94 (46%)
2. What is the molar mass of sugar (sucrose, C12H22O11)? Show your calculations.
C=12×12=144
H=1×22=22
O=16×11=176
To get the molar mass of the entire compound you, 144 + 22 + 176 = 342 g/mol
3. Convert the mass of dissolved sugar to moles. Show your calculations.
1.7 g ÷ 342 g/mol = 0.00497 moles
4. Convert the moles of sugar to molecules of sugar. Show your calculations.
0.00497 mole × 6.022 × 10^23 = 2.992934 × 10^21 molecules
5. Imagine that you used four pieces of gum instead of two. Calculate the number of moles. Show your calculations.
In theory, assuming the sticks of gum were exactly the same mass and sugar content, the moles would double.
2 ÷ 342 g/mol × 1.7 = 0.00994 moles
6. How does the mass of the saliva alter the experimental data?
It is impossible to blot off all the saliva with a paper towel because the gum sticks to the paper, so it adds more mass to the chewed gum and therefore alters the amount and percent of sugar calculations.
Answers
Answer:
yes it does look correct. good job.
Post- lab the percent sugar 46%, and the molar mass of sugar is 342 g/mol, the mass of dissolved sugar to moles is 0.00497 moles of sugar to molecules of sugar is 2.992934 × 10^21 molecules, assuming the sticks of gum were exactly the same mass and sugar content, the moles would double 0.00994 moles.
What are moles?moles is the unit of the molecule and it is defined as the number of molecules participating in a chemical reaction and value of one mole is equal to Avogadro constant that is 2.303 × 10²³
Sugar percentage = mass of sugar / mass of gum × 100 = 1.7 / 3.7 × 100 = 45.94 (46%)
Molar mass of sugar = C12H22O11 = C=12×12=144 + H=1×22=22 + O=16×11=176 = 342 g/mol
Mass of dissolved sugar to moles = 1.7 g ÷ 342 g/mol = 0.00497 moles
The moles of sugar to molecules of sugar = 0.00497 mole × 6.022 × 10^23 = 2.992934 × 10^21 moleculesIn the given theory using four pieces of gum will exactly be the same to the mass of sugar.2 ÷ 342 g/mol × 1.7 = 0.00994 moles
The mass of the saliva alter the experimental data because it is not possible to remove all the saliva from the surface as it gets stick to the paper which changes the amount of sugar.
Therefore, the percent sugar 46%, and the molar mass of sugar is 342 g/mol, the mass of dissolved sugar to moles is 0.00497 moles of sugar to molecules of sugar is 2.992934 × 10^21 molecules, assuming the sticks of gum were exactly the same mass and sugar content, the moles would double 0.00994 moles.
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How many molecules are in 2.0 moles?
Answers
Answer:
12 or 1.24e
please make this answer brainliest If I helped you!
Which of the following is most likely to lose electrons in an ionic compound?
a. lead (Pb)
b. carbon (C)
C. oxygen (O)
d. hydrogen (H)
Answers
Answer:
a. Lead (Pb)
Am 100% sure
Hope it helps
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what does SPDF Blocks represent on the periodic table?
Answers
Answer:
SPDF blocks represents the last electron of particular element entering into valance subshell.
example: oxygen is p block element because (1s2, 2s2 2p4) its last electron is in p block
A block of the periodic table is unified by the atomic orbitals in which valence electrons lie in.
What is the block in the periodic table?A block can be described as a set of elements in which the valence electrons lie in atomic orbitals. Each block in the periodic table is named after its characteristic orbital: s-block, p-block, d-block, and f-block.
The block names (s, p, d, and f) are derived from the value of an electron's azimuthal quantum number: sharp (0), principal (1), diffuse (2), and fundamental (3).
The s-block, where 's' stands for "sharp" and azimuthal quantum number 0, is on the left side of the periodic table. The p-block, where 'p' stands for "principal" and azimuthal quantum number 1, is on the right side of the modern periodic table and elements in groups 13 to 18.
The d-block, where 'd' stands for "diffuse" and azimuthal quantum number 2, is in the middle of the periodic table and elements from groups 3 to 12.
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What would be the immediate product of neutron absorption by Ag 107
Answers
The immediate product of neutron absorption by Ag-107 is silver atom with a mass of 108, Ag-108.
What is radioactivity?Radioactivity is the spontaneous emission of radiation as wall as particles and energy l by the nucleus of elements due to their disintegration.
The radioactive particles that are usually emitted include:
alpha particles beta particles andneutronsThe neutron has a mass of 1.
When silver isotope having a mass of 107 absorbs a neutron, the silver isotope produces will have a mass of 108, Ag-108.
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How moles of Cl' are in a 45 mL of 1,4 M solution of NaCl?
Answers
Answer:
.063 moles Cl-
Explanation:
To find moles multiply molarity by volume.
1.4*.045=.063 moles Cl-
dk how to do this :)
Answers
Answer:
2Mg, 2 02, MgO
When liquids of a ph 5 and ph 2 mixed together, gives what ph value
Answers
Answer:
By mixing two solutions of differing pH values, the final pH of the mixed solution is going to be a function of the pH-, or the hydrogen ion (H+), of the lower pH solution, and the final volume. The hydrogen ion(H+) of the higher pH solution has little to no effect in the final pH value.
How many milliliters of a 1 M nitric acid solution are required to prepare 60 mL of 0.15 M solution?
Select the correct answer below:
400 mL
O 9 mL
O 0.25 mL
none of the above
Answers
Explaination:
V1= m2*v2/m1 = 60 x 0.15 /1 = 9 mL
9 mL of a 1 M nitric acid solution are required to prepare 60 mL of 0.15 M solution. Therefore, the correct option is option A.
What is volume?A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected. A container's capacity is typically thought of as being represented by its volume.
Rather considering how much space the container takes up, think about how much fluid it could hold. Volume was initially measured using naturally occurring vessels of a comparable shape and then with standardised containers. Arithmetic formulas can be used to quickly calculate the volume of several straightforward three-dimensional shapes.
V1= m2×v2/m1 = 60 x 0.15 /1 = 9 mL
Therefore, the correct option is option A.
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What is the difference between weight and mass?
a
Mass depends on gravity and weight depends on the amount of matter.
b
Mass depends on electrons and weight depends on pounds.
c
Mass depends on the amount of matter and weight depends on gravity and mass.
d
Mass depends on pounds and weight depends on electrons.
Answers
Answer:
It's C. Mass Depends on the amount of matter and weight depends on gravity and mass.
Explanation:
Hope this helps
6. How many molecules of ammonia are present in 34 g of ammonia (Formula = NH3)?
Answers
What does an electrostatic force do?
A. An electrostatic force attracts oppositely charged particles.
B. An electrostatic force holds particles together by sharing
electrons.
C. An electrostatic force holds particles of the same charge together.
D. An electrostatic force attracts particles via gravitational pull.
Answers
Answer:
A.
Explanation:
Opposite charged particles attract.
Particles of same charge are repelled.
Answer:
attracts opposites (a)
Explanation:
How us butan -2-ol prepared from ethanal by using grignard reagent?
Answers
Answer:
Grignard reagents are made through the addition of magnesium metal to alkyl or alkenyl halides. The halide can be Cl, Br, or I (not F). It’s slightly easier to make Grignards from the iodides and bromides, however. Note what’s happening here – the magnesium is “inserting” itself between the carbon and the halide. This halide the “X” referred to when we refer to Grignard reagents as “RMgX”.
formation-of-grignard-reagents-from-alkyl-or-alkenyl-halides
Reaction Of Grignard Reagents With Aldehydes To Give Secondary Alcohols
One of the most common uses of Grignard reagents is in their reaction with aldehydes and ketones to form alcohols. In the first step, the Grignard forms the carbon-carbon bond. This results in an alkoxide (the conjugate base of an alcohol). To form the alcohol, it’s necessary to add acid at the end of the reaction (in what’s called the “workup” step). This is shown here as “H3O+” (the “X” is just the counter-ion, a spectator here)
reaction-of-grignard-reagents-with-aldehydes-to-give-secondary-alcohols
Reaction Of Grignard Reagents With Ketones To Give Tertiary Alcohols
The reaction behaves similarly with ketones. Again, there’s nothing special about the Cl here – it all depends on how you made the Grignard in the first place.
eaction-of-grignard-reagents-with-ketones-to-give-tertiary-alcohols
Grignards Add Twice To Esters And Acid Halides
Grignard reagents will also add to esters. What makes these reactions a little more complicated is that they add twice. The net result (after addition of acid) is a tertiary alcohol. This is also the case for acid halides (acyl halides) and anhydrides. One notable exception is carboxylic acids (more on that below).
reaction-of-grignard-reagents-with-esters-to-give-tertiary-alcohols-double-addition
reaction-of-grignard-reagents-with-acid-halides-to-give-tertiary-alcohols-double-addition
Addition Of Grignard Reagents To Epoxides
Another important reaction of Grignard reagents is that they will add to epoxides to form carbon-carbon bonds. One thing to keep in mind here is that the tendency is for them to add to the less substituted end of the epoxide – that is, the less sterically hindered end. You can think of this reaction as being essentially similar to an SN2 reaction. After addition of acid, an alcohol is obtained.
reaction-of-grignard-reagents-with-epoxides-to-give-alcohols
Reaction Of Grignard Reagents With Carbon Dioxide To Give Carboxylic Acids
Grignard reagents also add to carbon dioxide (CO2) to form carboxylates, in a reaction similar to their reactions with ketones and aldehydes. The carboxylates are converted to carboxylic acids after addition of acid (such as our trusty H3O(+) ).
reaction-of-grignard-reagents-with-co2-carbon-dioxide-to-give-carboxylic-acids
Grignard Reagents Are Strong Bases – Protonation (And Deuteration)
Finally, since Grignard reagents are essentially the conjugate bases of alkanes, they’re also extremely strong bases. This means that sometimes acid-base reactions can compete with their nucleophilic addition reactions. One common situation where this crops up is when Grignard reagents are added to carboxylic acids. It’s easy to forget that carboxylic acids… are acids. This means that instead of adding to the carbonyl, they react with the proton instead and form the carboxylate salt.
reaction-of-grignard-reagents-with-acidic-hydrogens-acids-to-incorporate-h-and-deuterium
This can also be used to convert alkyl halides to alkanes. First you treat it with magnesium, and then you treat the Grignard with a strong acid. This gives you the alkane. You can also use this to introduce deuterium (D) into molecules! The first step is to make the Grignard reagent. The second is to treat that Grignard with a deuterated acid such as D2O. This gives you the deuterated alkane!
Mechanism: Addition Of Grignard Reagents To Aldehydes And Ketones
So how does it work? The key to the Grignard reagent is actually very simple. When you think about the relative electronegativities of carbon (2.5) and magnesium (1.1), the bond between carbon and magnesium is polarized toward carbon. That means that carbon is more electron rich than magnesium and is actually nucleophilic! Here’s a closer look.
mechanism-for-addition-of-grignard-reagents-to-aldehydes-or-ketones
In the reaction of Grignards with aldehydes, the carbon attacks the carbonyl carbon and performs a 1,2-addition to give an alkoxide. In the second step, acid is added to give you the alcohol.
What is the product of radioactive decay 0/-1 e called?
A. An alpha particle
B. A beta particle
C. Nuclear fission
D. A gamma wave
Answers
Answer:
it represents a beta particle so the answer is B a beta particle
Answer:
The product of radioactive decay ⁰-₁e called a beta particle
B. A beta particle
What is the pressure exerted by a force of 14.7 N over an area of 0.00482 m²?
Answers
Answer:
[tex]p= \frac{F}{A} = \frac{ 14.7 }{0.00482} = 3050 \: Pa[/tex]
The release of aluminium ions as a result of acid rain is less significant in areas containing limestone rock - why?
Answers
Answer:
As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes. The more acid that is introduced to the ecosystem, the more aluminum is released. Some types of plants and animals are able to tolerate acidic waters and moderate amounts of aluminum
Explanation:
1. Which statement is always true when nuclear fusion occurs?
A. The number of protons in the resulting nucleus is less than in each starting nucleus.
B. The number of protons in the resulting nucleus is double that of a starting nucleus.
C. The combined number of portions and neutrons remains constant.
D. The total number of protons and neutrons in each nucleus remains constant.
•
2. Use the equation to answer the question.
2H + 2H—> 4H + energy
1 1 2
Which statement best describes the mass numbers of the atoms in the reaction?
A. There are two atoms with mass numbers of 2.
B. There is one atom with
a mass number of 2.
C. There are two atoms with mass numbers of 1.
D. There is one atom with a mass number of 1.
•
3. How is the mass number calculated for an atom involved in nuclear fusion?
A. It is the number of electrons.
B. It is the number of protons plus electrons.
C. It is the number of neutrons.
D. It is the number of protons plus neutrons.
•
4. Which change will always take place in nuclear fusion?
A. The total charge will be less than before the fusion took place.
B. The nucleus with a smaller mass than any of the reactants will be produced.
C. A nucleus with a greater mass than any of the reactants will be produced.
D. The total charge will be greater than before the fusion took place.
•
5. Which statement best summarizes the way the sun produces energy?
A. Combustion reactions in the sun release large amounts of chemical energy.
B. Fusion reactions in the sun release large amounts of chemical energy.
C. Combustion reactions in the sun convert small amounts of matter into large amounts of energy.
D. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.
Answers
Answer:
1. The combined number of protons and neutrons remains constant.
2. There are two atoms with mass numbers of 2.
3. It is the number of protons plus neutrons.
4. A nucleus with a greater mass than any of the reactants will be produced.
5. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.
Please Help Me Answer Numbers 7, 9, 10, and 11!
Answers
20 L of nitrogen gas are collected at a temperature of 50°C and 2 atm. How many grams of nitrogen gas were collected? A.21.1 g B.29.6 C.42.3 g D.59.2
Answers
Taking into account the Ideal Gas Law, the mass of nitrogen gas collected is 21.1 grams.
Ideal Gas LawIdeal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of gases:
P×V = n×R×T
Mass of nitrogenIn this case, you know:
P= 2 atmV= 20 Ln= ?R= 0.082 [tex]\frac{atm L}{molK}[/tex]T= 50 °C= 323 K (being 0°C= 273 K)Replacing in the ideal gas law:
2 atm ×20 L = n×0.082 [tex]\frac{atm L}{molK}[/tex] ×323 K
Solving:
n= (2 atm ×20 L) ÷(0.082 [tex]\frac{atm L}{molK}[/tex] ×323 K)
n= 1.51 moles
Being the molar mass of nitrogen 14 g/mole, that is the amount of mass that a substance contains in one mole, the mass of nitrogen gas collected is calculated as:
[tex]mass of nitrogen gas=1.51 molesx\frac{14 grams}{1 mole}[/tex]
mass of nitrogen gas= 21.1 grams
Finally, the correct answer is option A.: the mass of nitrogen gas collected is 21.1 grams.
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find the molarity of 131 g Ba(NO3)2 dissolved in 750.0 water
Answers
Answer:
6.68 x 10^-4
Explanation:
131g ÷ 261.337g/mol = 0.5012685 moles
0.5012685 moles ÷ 750.0 liters =
0.5012685÷ 750.0=0.000668358
6.68 x 10^-4
A solution was found to have a 15.6 % transmittance at 500 nm, its wavelength of maximum absorption, using a cell with a path length of 5.00 cm. Calculate the absorbance of the solution in a 1.00 cm cell at 500 nm. A. 0.161 B. 69.0 C. 0.0312 D. 4.04
Answers
For the absorbance of the solution in a 1.00 cm cell at 500 nm is mathematically given as
A’ = 0.16138
What is the absorbance of the solution in a 1.00 cm cell at 500 nm?Absorbance (A) 2 – log (%T) = 2 – log (15.6) = 0.8069
Generally, the equation for the Beer’s law is mathematically given as
A = ε*c*l
0.8069 = ε*c*(5.00 )
ε*c = 0.16138 cm-1
then for when ε*c is constant
l’ = 1.00
A’ = (0.16138 cm-1)*(1.00 cm)
A’ = 0.16138
In conclusion, the absorbance of the solution in a 1.00 cm cell at 500 nm is
A’ = 0.16138
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What is the difference between typhoons and hurricanes?
A. Wind speed
B. Strength of the wind
C. Amount of rainfall
D. Place of origin
Answers
What is the difference between typhoons and hurricanes?
A. Wind speed
B. Strength of the wind
C. Amount of rainfall
D. Place of origin
typhoons and hurricanes are both tropical cyclones its only one difference is the place of origin
option D place of origin
describe the arrangement of the 118 elements in the periodic table how is it arrange?