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3 years ago

Which the following atoms will not react with water? a. K b. Li c. Pb d. Na

Chemistry

2 answers:

Veseljchak [2.6K]3 years ago

8 0

B. Li thats the anwser

Digiron [165]3 years ago

6 0

Answer: option C. Pb

Explanation: Pb does not react with water under normal conditions.

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Please help asap, I have 10min

Grace [21]

Answer:

electrons

Explanation:

because it rotates the nucleus around it

3 0

4 years ago

Consider the rate law below.

Inessa [10]

If you double the concentration of A, the rate is doubled. If you doubled the concentration of B, since the rate law has B^2, the rate is multiplied by 4. If you double both A & B's concentrations, then the rate would be multiplied by 2*4 = 8, which is the last option.

3 0

4 years ago

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What term describes a substance that does the dissolving

NARA [144]

A <span>substance that does the dissolving is called a </span>solute.

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3 years ago

The element boron exists in nature as two isotopes: 10B has a mass of 10.0129 u, and 11B has a mass of 11.0093 u. The average at

Shalnov [3]

Answer:

Percentage abundance of B 10 is = 20 %

Percentage abundance of B 11 is = 80 %

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, B 10:

% = x %

Mass = 10.0129 u

For second isotope, B 11:

% = 100 - x

Mass = 11.0093 u

Given, Average Mass = 10.81 u

Thus,

$10.81=\frac{x}{100}\times {10.0129}+\frac{100-x}{100}\times {11.0093}$

$10.0129x+11.0093\left(100-x\right)=1081$

Solving for x, we get that:

x = 20 %

Thus percentage abundance of B 10 is = 20 %

Percentage abundance of B 11 is = 100 - 20 % = 80 %

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3 years ago

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What is the difference between bulk and particle scale? <br> Someone please help!!

sesenic [268]

Answer:

Particle density is the volumetric mass of the solid soil. It differs from bulk density because the volume used does not include pore spaces. Particle density represents the average density of all the minerals composing the soil.

Hope that helps

7 0

4 years ago