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Xelga [282]
3 years ago
7

Please help!! only right answers!! will mark brainlest.

Chemistry
1 answer:
Verizon [17]3 years ago
5 0

Answer:

7.35 *2

Explanation:

Because I mole of Na2o is made of 2 moles of NaOH

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RUDIKE [14]

The answer is A: Point z

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What is environmental science and why is it important?
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Our environment is very important to us because it is where we live and share resources with other species. ... Environmental science enlightens us on how to conserve our environment in the face of increasing human population growth and anthropogenic activities that degrade natural resources and ecosystems.

6 0
3 years ago
What is the molar mass of Al^2(SO^4)3
borishaifa [10]
342.14 g/mol

Molar mass of Al= 26.98
Molar mass of S=32.06
Molar mass of O=16.00

(26.98)2+(32.06+(16.00×4))3=342.14
7 0
3 years ago
A quantity of water vapor at 100​°​C is condensed to liquid water at the same temperature. In the process, 180,414.08 joules of
salantis [7]

Answer:

0.08kg

Explanation:

Given parameters:

Temperature of water  = 100°C

Quantity of heat released = 180414.08J

Unknown:

Quantity of water condensed  = ?

Solution:

This is simple phase change process without any attendant change in temperature.

To solve this problem, use the formula below;

             H  = mL

H is the heat released

m is mass

L is the latent heat of condensation of water  = 2260 kJ/kg

 Insert the parameters and solve;

       180,414.08 = m x  22.6 x 10⁵ J/kg

         m  = \frac{180414.08}{2260000}   = 0.08kg

5 0
3 years ago
How does a physical change obey the law of conservation of mass?
iren2701 [21]
Let's consider water.
Regardless of what form it turns into, the mass should remain the same.
It's the same H20.
Add some heat and it becomes water vapor,
cool it down a bit and it becomes ice.
if you make it just right, it becomes water again.

A chemical change would involve the one or more element(s) changing into a different solution all together.
It cannot be reversed unless you use electrolysis or some other method.
5 0
3 years ago
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