Molar mass O2 = 31.99 g/mol

Molar mass CO2 = 44.01 g/mol

Moles ratio:

<span>C3H8 + 5 O2 = 3 CO2 + 4 H2O
</span>
5 x 44.01 g O2 ---------------- 3 x 44.01 g CO2
( mass of O2) ------------------ 37.15 g CO2

mass of O2 = 37.15 x 5 x 44.01/ 3 x 44.01

mass of O2 = 8174.8575 / 132.03

mass of O2 = 61.916 g

Therefore:

1 mole O2 ----------------- 31.99 g
moles O2 -------------------- 61.916

moles O2 = 61.916 x 1 / 31.99

moles = 61.916 / 31.99 => 1.935 moles of O2

4 0

3 years ago

Water that fills the cracks and spaces in underground soil and rock layers is calleda. salt water.

algol [13]

The answer is groundwater

8 0

2 years ago

Be sure to answer all parts. Fluoride ion is poisonous in relatively low amounts: 0.2 g of F− per 70 kg of body weight can cause

Stells [14]

Answer:

200 liters of fluoridated drinking water would have to be consumed by as person to reach the toxic level.

Explanation:

Toxic level of fluoride ions = 0.2 g per 70 kg body weight

Concentration of fluoride ions in drinking water = 1 mg/ L = 0.001 g/L

1 mg = 0.001 g

Let the volume of drinking water consumed by person to reach the toxic level of fluoride concentration be V.

For 70 kg body weight 0.2 grams of fluoride ions will be toxic.

$V\times 0.001 g/L=0.2 g$

$V=\frac{0.2 g}{0.001 g/L}=200 L$

200 liters of fluoridated drinking water would have to be consumed by as person to reach the toxic level.

7 0

2 years ago

A former high school teacher was discovered making meth, and the dea recently analyzed some confiscated material from a drug bus

Sergio [31]

n = 3. (I know I'm answering this a week later, still hope this helps you understand the concept.) C17H14O7 has a molar mass of 330.29 g/mol. An empirical formula is essentially just a chemical formula simplified down to it's most common denominator of the subscripts. Dividing 990.87 g/mol by 330.29 g/mol gives us 3, the value of n. To go further, the chemical he was using was C51H42O21, or... (2R,2'R,2''R,3R,3'R,3''R,4R,4'R,4''S)-2,2',2''-Tris(3,4-dihydroxyphenyl)-4''-(2,4,6-trihydroxyphenyl)-3,3',3'',4,4',4''-hexahydro-2H,2'H,2''H-4,8':4',8''-terchromene-3,3',3'',5,5',5'',7,7',7''-nonol, whatever the hell that is.

5 0

2 years ago

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