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tankabanditka [31]
3 years ago
7

All I need is 6 7 8 can you help me thank you!

Chemistry
1 answer:
puteri [66]3 years ago
7 0
7. The molar mass of pottasium dichromate(K2Cr2O7) = 294 g.
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What mass in grams of SO2 is needed to react with 37.50 mol of Oz?
-BARSIC- [3]

Answer:

4804.5 g of SO₂ are needed to the reaction

Explanation:

The reaction to produce sulfuric acid is:

2SO₂ + O₂ + 2H₂O →  2H₂SO₄

Ratio is 1:2. 1 mol of oxygen needs 2 moles of sulfur dioxide in order to react. We can propose this rule of three.

If 1 mol of O₂ react to 2 moles of SO₂

Then, 37.50 moles of O₂ will react with (37.5 . 2) /1 = 75 moles of SO₂

We convert the moles to mass, to know the answer:

75 mol . 64.06 g / 1 mol = 4804.5 g of SO₂

6 0
3 years ago
Which of the following elements would be the least likely to form a cation if involved in a chemical reaction?
quester [9]
Cation means postive charged
answer is potassium.
being +1
6 0
3 years ago
Read 2 more answers
How many grams of HCl(aq) are required to react completely with 1.25g of Zn(s) to form ZnCl2(aq) and H2
faltersainse [42]

1.39 g HCl

Explanation:

The balanced chemical equation for this reaction is given by

Zn(<em>s</em>) + 2HCl(<em>aq</em>) ---> ZnCl2(<em>aq</em>) + H2(<em>g</em>)

Convert the # of grams of Zn to moles:

1.25 g Zn × (1 mol Zn/65.38 g Zn) = 0.0191 mol Zn

Use the molar ratio to find the # of moles of HCl needed to react completely with the given amount of Zn:

0.0191 mol Zn × (2 mol HCl/1 mol Zn) = 0.0382 mol HCl

Convert this amount to grams:

0.0382 mol HCl × (36.458 g HCl/1 mol HCl) = 1.39 g HCl

8 0
3 years ago
Which species is most vulnerable to extinction raccoon or mountain gorilla
777dan777 [17]
Mountain Gorilla’s are more vulnerable to extinction because they are endangered due to habitat loss, diseases, poaching, ect.
6 0
3 years ago
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I have 4 moles of CO2. How many molecules of CO2 is this?
Lemur [1.5K]

Answer:

4?

Explanation:

4, I think.

7 0
4 years ago
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