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3 years ago

how many grams of oxygen gas are needed to produce 10.0 grams of carbon dioxide according to the balanced equation of CH4

1 answer:

7 0

Molar mass of :

O2 = 16 * 2 = 32 g/mol

CO2 = 12 + 16 * 2 = 44 g/mol

Balanced chemical equation :

1 CH4 + 2 O2 = 1 CO2 + 2 H2O
↓ ↓
2 moles 1 mole

2* 32 g O2 ----------> 1* 44 g CO2
x g O2 ------------> 10.0 g CO2

44 x = 2 * 32*10.0

44 x = 640

$x = \frac{640}{44}$

$x = 14.54 g$ of O2

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A gas has a volume of 350.0 mL at 45.0°C. If the volume changes to 400.0 mL, what is the new

nekit [7.7K]

Answer:

363.6 K

Explanation:

To solve this problem we will use Charles law equation i.e,

V1/T1 = V2/T2

Given data

V1= 350 mL

T1= 45.0 °C

V2= 400.0 mL

T2=?

First of all we will convert the temperature into kelvin because the kelvin is an absolute scale of temperature.

T1= 45.0+ 273.15 = 318.15 K

Now we will put the values in equation

350 mL / 318 K = 400 mL / V2

V2= 400 mL × 318.15 K / 350 mL

V2= 363.6 K

We can see that by increasing the temperature volume of given gas is also increases. we conclude that volume and temperature are directly proportional to each other. It is also confirmed by the Charles law.

“ The volume of given mass of a gas at a constant pressure is directly proportional to the absolute temperature ”

5 0

3 years ago

Bromine (Br2) is produced by reacting sea water with chlorine (Cl2) by the following reaction. What mass of Cl2 (in kg) is neede

maxonik [38]

Haha ironically I had this problem not too long ago, I hope by this we will both be better students. Everyone just needs practice. Ok stop to pep talk and lets go. I'll try to go step by step.

So basically since this is a balanced equation, the ratios of mols of the elements are equal, atom wise. 

So you notice they give you Br2 is 1.0 kg (1000g) and that means there are 2 mols of Br2. And its asking for Cl2, (on the left) it also has 2 mols. 
Then you can start from 1000g Br2 and multiply with 2 mol Br2 and 159.8g Br2 on the bottom. The 159 8 is the actual grams per mol. Then when you write this down, continue multipying with the next fraction. 

Since you know the molar mass of Cl2 is 70.4 and you know theres 2 mols, you can say that 2 mols of Br2 = 2 mols of Cl2 so you should be able to multiple 2 mol Br2 / 159.8g Br2 with 70.4 g Cl2 / 2 mol Cl2. Bam the mols cancel out and you have the grams for Cl2. Multiple all that out and you should get 443g Cl2. Notice how the beginning question gives 2 significant figures, so technically 440g Cl2 is more of an exact number.

5 0

3 years ago

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.155 g of this subunit w

olga_2 [115]

Answer : The molar mass of protein is, $1.38\times 10^4g/mol$

Explanation :

Formula used :

$\pi =CRT\\\\\pi=\frac{w\times 1000}{M\times V}RT$

where,

$\pi$ = osmotic pressure = 0.138 atm

C = concentration

R = solution constant = 0.0821 L.atm/mol.K

T = temperature = $28^oC=273+28=301K$

w = mass of protein subunit = 0.155 g

M = molar mass of protein subunit = ?

V = volume of solution = 2.00 mL

Now put all the given values in the above formula, we get:

$\pi=\frac{w\times 1000}{M\times V}RT$

$0.138atm=\frac{0.155g\times 1000}{M\times 2.00ml}\times (0.0821L.atm/mole.K)\times (301K)$

$M=13878.17g/mol=1.38\times 10^4g/mol$

Therefore, the molar mass of protein is, $1.38\times 10^4g/mol$

6 0

3 years ago

The chemical equation of photosynthesis includes 6o2. which best describes this substance?

LenaWriter [7]

The chemical equation of photosynthesis includes 6 $O_{2}$ . -----a gas produced during photosynthesis best describes this substance

Elaborate:

During photosynthesis plants use carbon dioxide, water and sunlight to make sugar (glucose) and a waste product, oxygen gas.

the equation of this process can be:

6 $CO_{2}$ + 6 $H_{2} O$ + light energy → $C_{6} H_{12} O_{6}$ + 6 $O_{2}$

carbon dioxide + water + light → glucose + oxygen

Is 6 $O_{2}$ a product of photosynthesis?

In photosynthesis, energy from light is used to convert carbon dioxide and water into glucose and oxygen. For 6 carbon dioxide and 6 water molecules, 1 glucose molecule and 6 oxygen molecules are produced.

What happens to sugar water oxygen and carbon dioxide during photosynthesis?

During photosynthesis, plants take in carbon dioxide and water from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.

Learn more about photosynthesis:

brainly.com/question/19160081

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4 0

1 year ago

Why do covalent bonds not involve the transfer of electrons

zhannawk [14.2K]

Covalent bonds do not involve electron transfer because in covalent bonds, the electrons are shared between the atoms to form the molecule rather than being transferred to form ions as it is in the case of ionic bonds.

6 0

3 years ago

Read 2 more answers