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Novay_Z [31]
3 years ago
9

How does a scientist use observations to help create the

Chemistry
1 answer:
alexira [117]3 years ago
8 0

Answer:

They use hypotheses to guess a result based on what they already know. Observations are used to record the results of an experiment. Predictions are used to have an expected outcome of a test, thinking the hypothesis is correct. Experiments are used to test the hypothesis.

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Magnesium is added to dilute hydrochloric acid. This makes bubbles of hydrogen and a colorless solution of magnesium chloride. W
Klio2033 [76]

Answer:

The products are already in the question Hydrogen gas and Magnesium Chloride

Explanation:

2Mg +2HCl₂ = 2MgCl₂ + H₂ balanced equation if you need it

5 0
3 years ago
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A gas at constant volume has a pressure of 2. 80 atm at 400. K. What will be the pressure of the gas at 360. K? 2. 52 atm 2. 94
katovenus [111]

Answer:

2.52atm for sure

Explanation:

We know that:

P1= 2.80atm

T1= 400k

T2= 360k

And we want to find P2= ?

We have an equation: P1/T1 = P2/T2

Multiple both side by T2 to remove it

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6 0
3 years ago
All molecules have the same kinetic energy and hence the same speed.<br><br> O True<br><br> O False
topjm [15]
False...their speed differs
4 0
3 years ago
Quiz
Ierofanga [76]

Answer:

It has varying degrees of thickness.

Explanation:

The oceanic crust of earth is different from the continental part of the earth's crust. It is much thinner which is about 5 km to 80 km in thickness. It is described as having much similarities with the mantle of the earth which is also very varying in thickness.

Explanation:

8 0
3 years ago
Determine the percent composition of chlorine (Cl) in sodium chloride (NaCl). .
faust18 [17]
It's (grams-of-Cl/total-grams)(100), so (35.45g/58.44g)(100) = 60.66% Cl. Hope this helps!
8 0
3 years ago
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