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guajiro [1.7K]
3 years ago
7

A freight train rushed down the track going south at 60 mph. This is an example of ____.

Chemistry
1 answer:
yanalaym [24]3 years ago
6 0
It's (d) VELOCITY
If statement were just 60mph it would've been SPEED
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Which change to the experimental design would improve the reliability of the engineers' measurements?
luda_lava [24]

Answer:

c

Explanation:

sorry if im wrong my apolgies but i think c cus thats the only one that says equal amounts of something

like to test a drop of each so its balanced

4 0
3 years ago
Write a balanced chemical equation describing the reaction of zinc and hydrochloric acid.
erastova [34]
The chemical formula for zinc is Zn, and HCl for hydrogen chloride. The complete balanced equation for these reactants would be:

Zn + 2 HCl → ZnCl₂ + H₂

The stoichiometric coefficient 2 for HCl is essential to obey the Law of Conservation of Mass. The elements before and after the reaction must be equal in amounts.
5 0
4 years ago
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You conduct an experiment that requires the creation of an ammonia solution. You do this by reacting 50.0 L of nitrogen gas with
ozzi

Answer : The molarity of the resulting ammonia solution is, 0.89 M

Explanation :

The balanced chemical reaction is:

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

First we have to calculate the moles of nitrogen gas.

As we know that at STP, 1 mole of gas occupies 22.4 L volume of gas.

As, 22.4 L volume of nitrogen gas present in 1 moles of nitrogen gas

So, 50.0 L volume of nitrogen gas present in \frac{50.0}{22.4}=2.23 moles of nitrogen gas

Thus, the moles of nitrogen gas is 2.23 moles.

Now we have to calculate the moles of ammonia gas.

From the reaction, we conclude that

As, 1 mole of N_2 react to give 2 mole of NH_3

So, 2.23 moles of N_2 react to give 2.23\times 2=4.46 moles of NH_3

Now we have to calculate the molarity of the resulting ammonia solution.

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

\text{Molarity}=\frac{\text{Moles of ammonia}}{\text{Volume of solution (in L)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{4.46mole}{5.0L}

\text{Molarity}=0.89M

Therefore, the molarity of the resulting ammonia solution is, 0.89 M

7 0
3 years ago
What is the surface area of the triangular prism?<br> 60ft<br> 72ft<br> 82ft<br> 84ft
ch4aika [34]

Answer: I’m pretty sure it’s 60

Explanation:

3 0
3 years ago
A scientist is combining two grey elements he thinks he will get a compound why is this prediction wrong
DedPeter [7]
In a compund, the proportion must be fixed, unlike mixture. Therefore, if he just combine two elements, there must be excess elements mixed in it.
Second, how did he combined two elements? In order to create a compund, either heat or electricity must be applied.
Therefore, even if he used heat / electricity, he still hasn't got the right proportion, therefore he must have mixed some excess elements into the compund that he thought he made.
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3 years ago
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