Look at a periodic table. Ptable.com is great. Amu= g/mol which is found under the symbol. divide the number heavier by the total and multiply by 100 to get percent.
Explanation:
Molecular mass:
Atomic masses:
N = 14g/mol H = 1g/mol S = 32g/mol O = 16g/mol Cl = 35.5g/mol
C = 12g/mol
NH₃ = 14 + 3(1) = 17g/mol
SO₂ = 32 + 2(16) = 64g/mol
Cl₂ = 2(35.5) = 71g/mol
N₂ = 14(2) = 28g/mol
CH₄ = 12 + (4 x 1) = 16g/mol
To solve this problem;
we need to derive an equation to find the molecular mass from the given densities on the table.
At STP;
Number of moles = 
eqn (i)
Also;
Number of moles = 
eqn (ii)
Now we can equate the two equations;
=
since density is known, we have to rewrite the relationship by making molar mass the subject of the expression:
Molar mass = 
we know that;
Density = 
Molar mass = density x 22.4
Now ;
Molar mass for 1.25g/L = 1.25 x 22.4 = 28g/mol; which is for N₂
Molar mass for 2.86g/L = 2.86 x 22.4 = 64.1g/mol; which is for SO₂
Molar mass for 0.714g/L = 0.714 x 22.4 = 16g/mol; which is for CH₄
learn more:
Gases at STP brainly.com/question/7795301
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Thank you for posting your question here at brainly. Below are the choices that can be found elsewhere:
12.88 M
<span>0.1278 M </span>
<span>0.2000 M </span>
<span>0.5150 M
</span>
Below is the answer:
<span>5 times diluted (250/50),so 2.575/5=0.515 M
</span>
I hope it helps.
<span>A warm front occurs when a cold air mass retreats and is replaced by a warm air mass</span>
The density of a solid object that has a mass of 1.62 lb and a volume of 190 mL is 3.87g/mL.
<h3>How to calculate density?</h3>
Density is the measure of the mass of matter contained by a unit volume. It can be calculated by dividing the mass of the substance by its volume.
According to this question, a solid object is said to have a mass of 1.62 lb and a volume of 190 mL.
1 pound = 453.592 grams
1.62 Ibs is equivalent to 734.82 grams
Density of the solid object = 734.82 grams ÷ 190 mL
Density = 3.87g/mL
Therefore, the density of a solid object that has a mass of 1.62 lb and a volume of 190 mL is 3.87g/mL.
Learn more density at: brainly.com/question/20337365
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