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Paul [167]
3 years ago
10

Please Help mE!!!!!!!!!!!!!!!!!!!!!!

Chemistry
2 answers:
JulijaS [17]3 years ago
8 0
The answer is an ENDOTHERMIC REACTION.
HOPE THIS HELPS!!!!!
Lera25 [3.4K]3 years ago
4 0

It is an endothermic reaction because energy is being added that causes the temperature to increase.

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below left is a cylinder containing water. an ball with a mass of 21g and a volume of 15 cm3 is lowered into the water. sketch t
anyanavicka [17]

You didn’t show the cylinder containing water, so I created one that you can use as a model (see image).

The water level was originally at 37 mL.

Then you added the ball, and it displaced its volume of water.

The new volume reading is 52 mL, so

Volume of ball = volume of displaced water = 52 mL – 37 mL = 15 mL.

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3 years ago
If you measure the mass of a liquid is 11.50 g and its volume as 9.03 ml how many significant figures should its density value h
MAXImum [283]

To get a result with the best degree of precision, the number of significant figures should be equal to the smallest number of significant figures of the given numbers. In this case, the smallest is 3 as given by the number 9.03 mL.

Therefore density is:

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3 years ago
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How many sucrose molecules will be in 250 grams
sasho [114]
<h2>Answer:</h2>

We will need to know Avogadro's number and the molar mass of sucrose for this problem to do dimensional analysis.

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250g × \frac{1 mol}{342.297g} × \frac{6.022 * 10^{23} molecules}{1 mol} = 4.398 molecules

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tamaranim1 [39]
The answer would be B.
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