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Zielflug [23.3K]
3 years ago
9

What is the molar mass off a substance?

Chemistry
1 answer:
ruslelena [56]3 years ago
4 0
It is the mass of one mole of the substance.
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Draw the three alkenes, each of formula C5H10, that will form 2-methylbutane upon hydrogenation?
tiny-mole [99]
Answer is in Word document below.
Hydrogenation is reaction of organic compound with hydrogen. In this chemical reaction, three alkenes react with hydrogen and produce alkanes. Double bond in alkenes breaks up and single bond is formed. Three alkenes are all 2-butene with one methyl group substituent.
Download docx
6 0
3 years ago
How many moles of C8H18 contain 9.25 × 1024 molecules of C8H18 ?
fiasKO [112]
<span>One mole of any material contains 6.02 * 10e23 atoms or molecules. This is the Avogadro number. So 9.25 * 10e24 atoms are contained in (9.25*10e24 / 6.02 * 10e23) = 15.36 moles. So the answer is that moles of C8H18 is 15.36 moles</span>
3 0
3 years ago
Problem PageQuestion A major component of gasoline is octane . When octane is burned in air, it chemically reacts with oxygen ga
Ivahew [28]

Answer:

grams of oxygen = 21.40 g

Explanation:

octane → C8H18

The chemical reaction needs to be represented with a chemical equation before solving. The equation also need to be balanced.

C8H18 + O2 → CO2 + H2O

Balanced equation

2C8H18 + 25O2 → 16CO2 + 18H2O

Molar mass of octane = 12 × 8 + 18 = 96 + 18 = 114 g

Mass of octane in the chemical equation = 2 (114) = 228 g

molar mass of oxygen = 32 g

mass of oxygen in the chemical equation = 25 × 32 = 800  g

if  228 g of octane react with 800 g of oxygen

6.1 g of octane will require ? grams of oxygen

cross multiply

grams of oxygen = 6.1 × 800/228

grams of oxygen = 4880 /228

grams of oxygen = 21.4035087719

grams of oxygen = 21.40 g

 

5 0
3 years ago
5. How many moles are in 58.6 L of Nitrogen gas (N.) at STP?
pantera1 [17]

Answer:

2.6166 moles

Explanation:

stp means: T=273k   p=101.3kpa

R= 8.31(constant)       v=58.6  

using the ideal gas law; pv=nRt

                                        101.3 x 58.6 = n x 8.31 x 273

                                         n= (101.3 x 58.6)\(8.31 x 273)

                                         n= 2.6166moles

6 0
4 years ago
How does the volume of the balloon change after moving it to the hot room?How does the volume of the balloon change after moving
Ghella [55]

Answer: The balloons volume would increase.

Explanation: This is because when the balloon enters a warmer climate it expands due to more freedom within the molecules movement.

7 0
3 years ago
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