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diamong [38]
2 years ago
9

A gas effuses 4.0 times faster than oxygen (o2). what is the molecular mass of the gas? 1.0 g/mol 1.0 g/mol 2.0 g/mol 2.0 g/mol

4.0 g/mol 4.0 g/mol 7.67 g/mol
Chemistry
1 answer:
Anastaziya [24]2 years ago
5 0

Answer:

32(molecular mass has no unit )

Explanation:

(16)(o2)

16×2

=32

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14.2 grams of Na2SO4 is dissolved in water to make a 2.50 L
Trava [24]

Answer:

0.04 M

Explanation:

Given data:

Mass of Na₂SO₄= 14.2 g

Volume of solution = 2.50 L

Molarity of solution = ?

Solution:

Number of moles of Na₂SO₄:

Number of moles = mass/ molar mass

Number of moles = 14.2 g/ 142.04 g/mol

Number of moles = 0.1 mol

Molarity :

Molarity = number of moles of solute / volume of solution in L

Molarity = 0.1 mol / 2.50 L

Molarity = 0.04 M

6 0
3 years ago
ASAP!
Andrei [34K]

Answer:

8.3334%

Explanation:

You have two masses. To find the percent of sodium chloride in water by mass, you divide the mass of NaCl by water. First, make both units the same. Easiest is to convert kg into g. 1.5kg = 1500g

125g NaCl/1500g H2O = 0.0833333333 ==> 8.3334%

5 0
2 years ago
4. The compound iron sulfide can be formed by
VladimirAG [237]

Answer:

heating :))))))))))))))

Explanation:

the same as the last answer i posted... sorry it just came up in my recommended questions to answer

6 0
2 years ago
Magnesium has 2 valence electrons, and oxygen has 6 valence electrons. Which type of bonding is likely to occur between a magnes
ra1l [238]

Magnesium will give two electrons to oxygen and both will become ions.

6 0
2 years ago
What is the anion in the chemical formula MnSe2?
qwelly [4]
Magnesium(IV)dioxide
Hope this helped
8 0
3 years ago
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