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Anna35 [415]
3 years ago
7

what is the total mass of water formed when 8 grams of hydrogen completely reacts with 64 grams oxygen

Chemistry
1 answer:
Daniel [21]3 years ago
7 0

Question: Given the balanced equation representing a reaction:

2H2 + O2 ==>2H2O

What is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen?

(1) 18 g (3) 56 g

(2) 36 g (4) 72 g

Answer:

"72 gram" is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen

Explanation:

We will do stoichiometry in this kind of problem:

8g of H_2O\times(\frac{1molO_2}{2.0g H_2})(\frac{2 mol H_2O}{2mol H_2})(\frac{18g H_2O}{1molH_2O}) = 72g H_2O

64 g O_2 \times (\frac{1molO_2}{32g O_2})(\frac{2 mol H_2O}{1mol O_2})(\frac{16gH_2O}{1 mol H_2O}) = 72g H_2O

Therefore, the total mass of water formed is 72 g.

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Which of the following is false about a neutral atom of hydrogen?
Nesterboy [21]

Answer: Option (C) is the correct answer.

Explanation:

A neutral hydrogen atom is defined as the atom in which electrons are resent in their ground state only.

Basically in a neutral atom electrons are present in their parent shell.

For example, atomic number of hydrogen is 1 and electronic configuration of a neutral atom of hydrogen is 1s^{1}.

Hence, it means there is only one electron present in its valence shell. So, in order to attain stability it will readily react with another atom to gain or share an electron.

Thus, we can conclude that the statement it is less chemically reactive than an atom of aluminum (Al), is false.

3 0
3 years ago
Percent of water in Na2CO3 • 10H2O
Troyanec [42]
Hey there! 

In order to solve for the percentage of water in the compound, you will first need to find its total molar mass. You can do this by adding up the molar masses of each individual element in the compound. Then, you will divide the mass that you find of the water molecules by the total mass to get the percentage. 

→ Na₂CO₃ ×<span> 10 H</span>₂<span>O

</span>→ Na₂ = 22.9898 × 2 = 45.9796
→ C = 12.0107
→ O₃ = 15.999 × 3 = 47.997
→ 10 H₂O = 18.015 × 10 = 180.15

Now, just add all of those numbers up for the total molar mass. 

→ 45.9796 + 12.0107 + 47.997 + 180.15 = <span>286.1373
</span>
The last step is to divide the molar mass of the 10 water molecules by the total mass. 

→ 180.15 ÷ 286.1373 = <span>0.62959 </span>≈ 0.63

Your answer will be about 63%. 

Hope this helped you out! :-)
5 0
3 years ago
How many atoms are in the outer-most shell in order for it to be stable?
aksik [14]

Answer:

8 Electrons

Explanation:

Got it from siri lol :) Have a good day.

5 0
3 years ago
V 2 O 5 + Cl 2  VOCl 3 + O 2
rosijanka [135]

Answer: 3.5 moles V2O5

Explanation: First balance the chemical equation to find the stoichiometric factor between VOCl3 and V2O5

2 V2O5 + 6 Cl2 => 4 VOCl3 + 7 O2

So the mole to mole ratio is 2 moles V2O5 to 4 moles of VOCl3

Solution

7 moles VOCl3 x 2 moles V2O5 / 4 moles VOCl3 = 3.5 moles V2O5

5 0
3 years ago
How many moles of LINO3 are
lidiya [134]

Answer:

Explanation:

number of moles = mass / molar mass
                             = 525 / 7+14+(3*14)
                             = 525 / 63
                             = 8.33 mol

4 0
2 years ago
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