1 part per million is the same as
<span>1 mcg/mL (mcg = 1 micro gram = 1 * 10^-6 grams). </span>
<span>125 ppm = 125 mcg/mL </span>
<span>125 mcg/ml * [1 gram / 1 * 10^6 mgrm] = 1.25 * 10^-4 grams </span>
<span>The density of hard water is 1.000 grams / mL </span>
<span>50 mL of water contains 1.25 * 10^-4 grams. </span>
<span>given mass = 1.25 * 10^-4 </span>
<span>Molar mass = 100.0 grams / mole </span>
<span>n = ????? </span>
<span>n = 1.25 * 10^-4/100 = 1.25 * 10^-6 moles.
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
</span>
Answer: a
Explanation:
Set up a ratio and solve.
7.9 • 120 / 160 = 5.925
now split the equation in half
CH4+O2 I CO2 + 4H2O
C = 1 I C = 1
H = 4 I H = 8
O = 2 I O = 3
CH4+ 2O2 = CO2 + 2H20
Do you have a question you need help with?
I think it might be Core Electrons and Valence Electrons respectively. As core electrons are the name of the electrons for the inner levels. While valence is the outer shell electrons.
