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mylen [45]
3 years ago
6

Occurs when the moon moves between the Earth and Sun and blocks the light

Chemistry
2 answers:
Allushta [10]3 years ago
5 0
 i believe it called an eclipse 
loris [4]3 years ago
3 0
A Solar Eclipse happens when the moon is between Earth and the sun.
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10. Air is a homogenous mixture of gases. Oxygen is 20% by volume of air typically. What
raketka [301]

Answer:

893 moles

Explanation:

An ideal gas at STP occupies 22.4 liters. Calculating Oxygen as if it were an ideal gas there are . 893 moles of Oxygen in 20.0 liters.

3 0
3 years ago
2FePO, + 3Na S0,
trapecia [35]

26.5 g of Fe₂(SO₄)₃

Explanation:

We have the following chemical reaction:

2 FePO₄ + 3 Na₂SO₄ → Fe₂(SO₄)₃ + 2 Na₃PO₄

number of moles = mass / molecular wight

number of moles of FePO₄ = 20 / 151 = 0.1325 moles

Taking in account the chemical reaction we devise the following reasoning:

if        2 moles of FePO₄ produces 1 mole of Fe₂(SO₄)₃

then  0.1325 moles of FePO₄ produces X moles of Fe₂(SO₄)₃

X = (0.1325 × 1) / 2 = 0.06625 moles of Fe₂(SO₄)₃

mass = number of moles × molecular wight

mass of Fe₂(SO₄)₃ = 0.06625 × 400 = 26.5 g

Learn more about:

number of  moles

brainly.com/question/13838124

#learnwithBrainly

3 0
4 years ago
1. How many molecules are equal to 1x10(-5) moles?
tangare [24]

Answer:

10×(-5)=-50 which means their are -50 moles

4 0
3 years ago
Consider the reaction of zinc metal with hydrochloric acid:
Vsevolod [243]

Answer:

6.054×10²⁵

Explanation:

1)find number of moles of zinc

2)multiply the mole of zinc with 2

3)use the formula mol = number of particle/ avogadro constant

5 0
3 years ago
Which is more, 1 meter or 1,771 millimeters?
Tanzania [10]
1,771 millimeters are more than 1 meter :)
5 0
3 years ago
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