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Ann [662]
3 years ago
6

What is the molar mass of Na2Cr2O7?

Chemistry
1 answer:
iren2701 [21]3 years ago
6 0
The answer should be 261.97 g/mol
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What are things animals might do to survive?
ira [324]

Answer:

Ok,for some animals to survive,then ww should first look at the kind of ecosystem they ate exposed to.

So first for some animals to survive,some of them will have to migrate,and so migration in a given set up of an ecosystem,the other animals may lack food as in they depend on the migrating animals as their prey hence their food.

Secondly,hibernation some animals may hibernate due to intensive weather or climate change which is inevitable,and this might affect other animals in such a way that may lead to decrease of their counterparts hence dying due to an imbalance as the other animals may become prey to the predators available.

7 0
3 years ago
How would a solution that is labeled 5.0 M would be read as?
Ivanshal [37]
5 moles because molarity signifies number of moles dissolved in One litre of water
8 0
3 years ago
Read 2 more answers
A. Density of Liquids
morpeh [17]

Answer:

Mass of liquid: 20.421g

Density= 1.0109405940594 g/mL

Explanation:

Mass of liquid

To find mass of liquid you take the mass of beaker + liquid (171.223g) and subtract it from the Mass of beaker (beaker without the water). The difference is the answer.

171.223g - 150.802g = 20.421g

Density

To find density you use the formula Mass/Volume. Take the Volume given, and the mass of the liquid you just found.

20.421mL/20.421g = 1.0109405940594 g/mL

5 0
3 years ago
What is the molality of a solution
vitfil [10]
Molarity (M) is the concentration of a solution expressed as the number of moles of solute per liter of solution: Molarity (M) = moles solute. liters solution.
5 0
3 years ago
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A solution at 25 degrees Celsius is 1.0 × 10–5 M H3O+. What is the concentration of OH– in this solution? 1.0 × 10–5 M OH– 1.0 ×
Triss [41]

Answer:

1.0 × 10⁻⁹ M.

Explanation:

<em>∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.</em>

[H₃O⁺] = 1.0 x 10⁻⁵ M.

<em>∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺]</em> = 10⁻¹⁴/(1.0 x 10⁻⁵ M) = <em>1.0 × 10⁻⁹ M.</em>

6 0
3 years ago
Read 2 more answers
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