Which statement is true of the following reaction?

one atmospheric compound is responsible (after it have dissolved in water) for both the general acidity of normal rainwater and

ivolga24 [154]

Carbon dioxide is the atmospheric compound that is responsible (after it have dissolved in water) for both the general acidity of normal rainwater and the acidity of much soil. Natural rain water is slightly acidic because carbon dioxide combined with water in the air forms carbonic acid, which is a weak acid.

6 0

4 years ago

A chemical reaction has an increase in entropy and a decrease in enthalpy. what is known about the spontaneity of the reaction?

Kobotan [32]

I think the correct answer would be the first option. A chemical reaction that has an increase in entropy and a decrease in enthalpy is spontaneous at high temperatures. This reaction absorbs heat for it to occur so supplying heat to it is important.

4 0

3 years ago

Read 2 more answers

Which of these molecular shapes do you expect for the sf6 molecule? which of these molecular shapes do you expect for the molecu

seraphim [82]

There are six bond pair electrons around the central atom in Sulfur Hexafluoride. In order to attain the structure of least possible energy the Fluoride atoms attain the angle of 90° with respect to each other. And the bond pair electrons after maximum repulsion attain a Octahedral Shape as shown below,

6 0

3 years ago

Copper has two naturally occurring isotopes, 63Cu (isotopic mass 62.9296 amu) and 65Cu (isotopic mass 64.9278 amu). If copper ha

Semenov [28]

Answer:

Percentage of first isotope = 69.152 %

Percentage of second isotope = 30.848 %

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:

For first isotope:

Let % = x %

Mass = 62.9296 amu

For second isotope:

% = 100 - x % (Since, there are only two isotopes)

Mass = 64.9278 amu

Average mass = 63.546 amu

Thus,

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

Solving,

1.9982 x = 138.18

Thus,

<u>Percentage of first isotope = x = 69.152 %</u>

<u>Percentage of second isotope = 100 - x % = 30.848 %</u>

5 0

4 years ago

1.5 moles of Al is how many<br> atoms?

aev [14]

Answer:

<h2>9.03 × 10²³ atoms </h2>

Explanation:

The number of atoms of Al can be found by using the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 1.5 × 6.02 × 10²³

We have the final answer as

<h3>9.03 × 10²³ atoms</h3>

Hope this helps you

4 0

3 years ago