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harina [27]
3 years ago
15

Kindly Help Please!

Chemistry
1 answer:
Sveta_85 [38]3 years ago
4 0

Answer: 1) 2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O

2) 2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O

3) 2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O

4)2C_{10}H_{22}+31O_2\rightarrow 20CO_2+22H_2O

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical reactions will be:

1) Ethane + Oxygen = Carbon Dioxide + Water : 2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O

2) Butane + Oxygen = Carbon Dioxide + Water : 2C_4H_{10}+13O_2\rightarrow 8CO_2+10H_2O

3) Octane + Oxygen = Carbon Dioxide + water: 2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O

4) Decane + Oxygen = Carbon Dioxide + Water :  2C_{10}H_{22}+31O_2\rightarrow 20CO_2+22H_2O

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Calculate number of grams in 1.15*10^21 molecules of P2O5
Vlada [557]
To go from molecules, we first need to convert to moles and then convert to grams.

To convert from molecules to moles, we need to divide by Avogadro's constant.

1.15*10^21 molecules * (1 mole/6.022*10^23 molecules) = 0.0019097 moles

To convert from moles to grams, we need to use the molar mass.

The molar mass of P₂O₅ is (2*30.98)+(5*16.00) = 141.96
You can find the molar mass using the periodic table.

0.0019097 moles * (141.96 grams/1 mole) = 0.2711 grams.

Since we have 3 significant digits in 1.15*10^21, that means our final answer is limited to 3 significant digits.

Your final answer is 0.271 grams.
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4 years ago
The equation below shows the relationship between the temperature in degrees Celsius, C, and degrees Fahrenheit, F.
anyanavicka [17]
The initial equation is <span>F = (9/5)C + 32. We are asked to get the formula to solve for C. So the idea here is to isolate C on the other side, where F is currently located. 

1. Subtract 32 on both sides. 
2. Divide 9/5 on both sides. 

You should get </span><span>C = 5 over 9(F – 32) as your answer. </span>
3 0
4 years ago
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Which of the followings are true 1,3-BPG? A. It regulates Hb B. It contains a high-energy bond C. It contains two ester bonds D.
weeeeeb [17]

Answer:

D. It contains a phosphate with higher phosphoryl transfer potential than ATP

Explanation:

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3 years ago
The cation of the salt is sodium ion, and the anion is aurothiosulfate ion. Based on the chemical formula of the salt, what must
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Answer:

3-

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7 0
3 years ago
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nignag [31]
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<span>That means that your moles of sodium is equal to the moles of NaOH produced. Use the molar mass of NaOH - which is 39.998 g/mol along with your calculated number of moles to get the mass (the formula rearranges to m = nM). </span>

<span>This figure is the theoretical yield - what you would get if every last mole of sodium was converted into NaOH. </span>

<span>What you get in practice is the experminetal yield, and the percentage yield is the experimental yield divided by the theoretical yield - and then multiplied by 100%.</span>
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