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3 years ago

8

As the temperature of a substance decreases, the

2 answers:

77julia77 [94]3 years ago

7 0

Remains the same because temperature can't change energy

oksian1 [2.3K]3 years ago

5 0

Answer: Option (1) is the correct answer.

Explanation:

Kinetic energy is the energy that arises due to the motion of molecules. Average kinetic energy involves the sum of vibrational, translational and rotational kinetic energies.

When we decrease the temperature then the movement of molecules starts to decrease. As a result, there will be decrease in the average kinetic energy of its particles.

Thus, we can conclude that as the temperature of a substance decreases, the average kinetic energy of its particles decreases.

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Is this statement true or false? A chemical reaction is balanced when the number of atoms of each element is the same for both t

mart [117]

Answer: True

Explanation:

because

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3 years ago

What is the molarity of a NaOH solution if 48.0 mL of a 0.220 M H2SO4 solution is required to neutralize a 25.0-mL sample of the

Semenov [28]

Answer:

Molarity NaOH = 0.85M (2 sig figs)

Explanation:

48.0ml(0.220M H₂SO₄) + 25ml(Xmolar NaOH)H₂SO₄ + 2NaOH => Na₂SO₄ + 2H₂O

2(molarity x volume) H₂SO₄ = (molarity x volume) NaOH

2(0.220M x 48.0ml) = 25.0ml x Molarity NaOH

Molarity NaOH = 2(0.220M x 48.0ml)/25.0ml = 0.8448M ≅ 0.85M (2 sig figs)

6 0

3 years ago

Lithium, is used in dry cells and storage batteries and in high temperature lubricants, it has two naturally occurring isotopes,

erastovalidia [21]

<u>Answer:</u> The average atomic mass of lithium is 6.9241 u.

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ ....(1)

<u>For $_3^6\textrm{Li}$ isotope:</u>

Mass of $_3^6\textrm{Li}$ isotope = 6 u

Percentage abundance of $_3^6\textrm{Li}$ isotope = 7.59 %

Fractional abundance of $_3^6\textrm{Li}$ isotope = 0.0759

<u>For $_3^7\textrm{Li}$ isotope:</u>

Mass of $_3^7\textrm{Li}$ isotope = 7 u

Percentage abundance of $_3^7\textrm{Li}$ isotope = 92.41%

Fractional abundance of $_3^7\textrm{Li}$ isotope = 0.9241

Putting values in equation 1, we get:

$\text{Average atomic mass of Lithium}=[(6\times 0.0759)+(7\times 0.9241)]$

$\text{Average atomic mass of Lithium}=6.9241u$

Hence, the average atomic mass of lithium is 6.9241 u.

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3 years ago

1.986 x 10^6 in standard notation? science question

garik1379 [7]

The answer is going to be 1986000. hope that helped

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3 years ago

Why was 1990 an important year regarding air quality?

Valentin [98]

Why was 1990 an important year regarding air quality? Check all that apply.

2.Cost-effective ways to reduce pollution were emphasized.

4.Modifications and improvements were made to the Clean Air Act.

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3 years ago

Read 2 more answers