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Karolina [17]
3 years ago
13

QUICK!

Chemistry
2 answers:
forsale [732]3 years ago
5 0

I think it can be A or D Hope this helps.

Darya [45]3 years ago
4 0
A, all the others are incorrect
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The molar mass of magnesium (Mg) is 24.30 g/mol. There are 6.02 Times. 1023 atoms in 1 mol.
rjkz [21]
Your answer to this question is 1.20 times 1024 atoms
8 0
2 years ago
Explain how to count the number of elements in a compound
valentina_108 [34]

Answer:

Using the formula cards again, add the coefficient of 2 in front of the formula and have them recalculate the number of each element and the total number of atoms in each element.

Explanation:

5 0
3 years ago
According to the oxygen-hemoglobin dissociation curve, PO2 in the lungs of 100 mm Hg results in Hb being 98% saturated. At high
Ad libitum [116K]

Answer:

Hb would be 78.4% saturated.

Explanation:

This problem can be solved by using simple unitary method.

At 100 mm Hg pressure of oxygen, Hb is saturated by 98%

So, at 1 mm Hg pressure of oxygen, Hb is saturated by \frac{98}{100}%

Hence, at 80 mm Hg pressure of oxygen, Hb is saturated by \frac{98\times 80}{100}% or 78.4%

Therefore, at 80 mm Hg pressure of oxygen in the lungs, Hb would be 78.4% saturated.

4 0
2 years ago
A sample of 8.5 g NH 3 on oxidation produces 4.5 g of NO. Calculate the percent yield.
yanalaym [24]

Answer:

nvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnv

Explanation:

3 0
3 years ago
Nitrogen monoxide, NO, reacts with hydrogen, H₂, according to the following equation.
Anvisha [2.4K]

Answer : The rate law for the overall reaction is, Rate=k[NO]^2[H_2]

Explanation :

Rate law : It is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

As we are given the mechanism for the reaction :

Step 1 : 2NO+H_2\rightarrow N_2+H_2O_2    (slow)

Step 2 : H_2O_2+H_2\rightarrow 2H_2O     (fast)

Overall reaction : 2NO+2H_2\rightarrow N_2+2H_2O

The rate law expression for overall reaction should be in terms of NO\text{ and }H_2.

As we know that the slow step is the rate determining step. So,

The slow step reaction is,

2NO+H_2\rightarrow N_2+H_2O_2

The expression of rate law for this reaction will be,

Rate=k[NO]^2[H_2]

Hence, the rate law for the overall reaction is, Rate=k[NO]^2[H_2]

8 0
3 years ago
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