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3 years ago

Which of the following statements is true based on the kinetic-molecular theory of matter?

Chemistry

2 answers:

OverLord2011 [107]3 years ago

7 0

It's the last statement I think

Natalija [7]3 years ago

5 0

Answer:

The correct statement is :When the volume of a gas decreases, the pressure increases.

Explanation:

Main point of kinetic matter theory:

Matter is made of constantly moving small particles.
All matter posses some energy which also depends upon the temperature of the matter.Solid possess least amount of energy where as gases posses grater amount of energy.
Change in state of matter occur when change in energy takes place.
There are space between the particles of matter.As matter transits from solid to gas these space between particles increases.
Attractive force between the particles increases when particle moves closer to each other.

When we increase the pressure of the on the particles of matter the space between them will get decrease due to which attractive force between the particles will also get increase by which they will come closer and result in decrease in volume of the matter.

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Copper has two naturally occurring isotopes with atomic masses of 62.9296 u () and 64.9278 u (). The atomic mass of copper is 63

natta225 [31]

Answer:

The abundance of first isotope is 69.15 %

The abundance of second isotope is 30.85 %

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.

For first isotope:

% = x %

Mass = 62.9296 u

For second isotope:

% = 100 - x

Mass = 64.9278 u

Given, Average Mass = 63.546 u

Thus,

$63.546=\frac{x}{100}\times {62.9296}+\frac{100-x}{100}\times {64.9278}$

Solving for x, we get that:

x = 69.15 %

<u>The abundance of first isotope is 69.15 %</u>

<u>The abundance of second isotope is 100 - 69.15 % = 30.85 %</u>

4 0

4 years ago

¿Cuántos moles hay en 101,64 g de (NH4)²SO⁴?

Alex_Xolod [135]

10164g HK momjkjioikpllp

3 0

3 years ago

How many grams of salt(NaCl) are in 4.8 moles?

Dafna11 [192]

Molar mass of salt = 58.44 grams/mole

$m = 58.44 \frac{g}{mol} \times 4.8mol = 280.512g$

5 0

3 years ago

Which two processes are responsible for water's transfer of transfer of energy in the atmosphere and hydrosphere?

Liula [17]

Oooo! I love this :P
D. Precipitation and evaporation :P
When I rains the clouds travel from place 2 place raining in different places bringing water.
THE WATER CYCLE 4 ONE THING

7 0

3 years ago

43. Which of the following statements concerning the action of G proteins on adenylate cyclase is true? I. G proteins always ser

ExtremeBDS [4]

Answer:

Some G proteins activate adenylate cyclase, while others inhibit it.

Explanation:

G proteins helps in the signal transduction process that transfer message in the body. GPCRs (G-protein-coupled receptors) are located on the surface membrane of the cell.

The G protein can activates the protein or might deactivate the proteins that helps in the adenylate cyclase. The particular phosphorylation and dephosphorylation process at different sites by the G proteins can result in activation and inactivation of adenylate cyclase.

Thus, the correct answer is option (C).

8 0

4 years ago