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GuDViN [60]
3 years ago
12

Which is an example of a physical change? (Select all that apply.)

Chemistry
1 answer:
Jobisdone [24]3 years ago
8 0

Melting snow and boiling water!

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Nitrogen (N2) and hydrogen (H2) react to make NH3 according to the following
Schach [20]

The number of moles of NH3 that could be made would be 0.5 moles

<h3>Stoichiometric reactions</h3>

From the balanced equation of the reaction:

N2 (g) + 3 H2(g) ----> 2NH3 (g)

The mole ratio of N2 to H2 is 1:3

Thus, for 0.50 moles of N2, 1.5 moles of H2 should be present. But 0.75 moles of H2 was allowed to react. Meaning that H2 is limiting in this case.

Mole ratio of H2 and NH3 = 3:2

Thus for 0.75 moles H2, the mole of NH3 that would be produced will be:

                       2 x 0.75/3 = 0.5 moles

More on stoichiometric calculations can be found here: brainly.com/question/8062886

3 0
2 years ago
What do hydroligists primarly study
serious [3.7K]

Answer:

The study of movement, distribution and quality of water.

Explanation:

They measure the properties of bodied of water, such as the volume of and stream flow.

4 0
3 years ago
Callie rode her bike from the tree at point A back to her house to pick up her jacket while Sue road her bike directly from the
Serjik [45]

B

We can perceive this question as a vector (which has both magnitude and direction). The magnitude is the displacement and the direction is where they are headed.

Explanation:

The displacement (magnitude of the vector) for Callie, which is also equal to the distance, is; 4m + 3m = 7m while that of Sue is 5m. Therefore the displacement for Callie is greater than Sue’s.

Nonetheless the direction in the vector is the same, which is towards point C.

Learn More:

For more on vectors;

brainly.com/question/12006588

brainly.com/question/11823989

#LearnWithBrainly

3 0
3 years ago
Read 2 more answers
Name some ways of water irrigation. ​
Ivanshal [37]

Answer:

Surface Irrigation. Water is scattered equally throughout the land with the help of gravitational pull and it doesn’t require a machine to take care of it.

Localized Irrigation. Water is scattered throughout the land under low pressure.  

Drip Irrigation. In this process of drip irrigation, the water drops fall on the root of every plant that is around the system.

Explanation:

3 0
3 years ago
Pls help me thx! I would appreciate it!
inessss [21]

Answer:

Here just look at the pic here

Explanation:

7 0
3 years ago
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