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Rufina [12.5K]
3 years ago
9

Why might it be important in a real life situation, to know if a chemical or physical change occurred?

Chemistry
1 answer:
Roman55 [17]3 years ago
6 0
There are four signs<span> that a chemical reaction has occurred: a </span>change<span> in color, a </span>change<span> in temperature, formation of a gas or formation of a precipitate. A precipitate is a solid that forms when two liquid solutions are mixed. As matter </span>changes<span> in a chemical reaction, it can either absorb or release energy.</span>
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How do you find products in a chemical equation?
sammy [17]

Answer:

the elements or compounds on the right side of the equation

Explanation:

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How does an antacid work?
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8 0
2 years ago
How many magnesium atoms are in the product
strojnjashka [21]

Answer: Im not sure if you are doing this in your class.

Explanation:

So... for the element of MAGNESIUM, you already know that the atomic number tells you the number of electrons. That means there are 12 electrons in a magnesium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and two more in shell three

5 0
3 years ago
If 50 g of solute can be dissolved in 100 g of water, how many grams of solute can be dissolved in 300 g of water?
drek231 [11]

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3 0
3 years ago
help asap show work | a gas with a volume of 13L at a pressure of 197 kPA is allowed to expand to a volume of 23L. what is the p
Lera25 [3.4K]

Answer:

<h2>111 kPa</h2>

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we're finding the new pressure

P_2 =  \frac{P_1V_1}{V_2}  \\

We have

P_2 =  \frac{13 \times 197000}{23}  =  \frac{2561000}{23}  \\  = 111347.826...

We have the final answer as

<h3>111 kPa </h3>

Hope this helps you

5 0
3 years ago
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