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GarryVolchara [31]
3 years ago
5

(The roller coaster train slowly moved away from the station and over the top of a tall hill.

Chemistry
1 answer:
Nonamiya [84]3 years ago
6 0

Answer:

the answer is B "The speed of the train increased as the height of the train decreased"

Explanation:

hope it helps T^T

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What products would form if chlorine gas was bubbled through a solution of sodium bromide?
Misha Larkins [42]
NaCl would form because it’s a single replacement reaction
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Round the following number to four figures: 45.4673
zhenek [66]

This says four figures. The 4 figures you should use are 4546  with a peek at 7 to see what effect it will have on the 4 main figures.

45.467 rounds to 45.47

You round the 4th figure up one. You are not concerned about the decimal places in this question.

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Breaking bonds requires what type of energy flow?
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Explanation:

the energy that that is needed to break a bond is called the bond energy or dissciation energy

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How many moles of H2 and N2 can be formed by the decomposition of 0.145 mol of ammonia, NH3 ?​
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Answer:

Explanation:

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5 0
2 years ago
Calculate the % composition of the unknown liquid using your most precise result. It is a mixture of ethanol (D[ETOH] = 0.7890 g
Rufina [12.5K]

% composition of ethanol = 34.51%

% composition of water  = 65.49%

<h3>What is density?</h3>

A material's density is defined as its mass per unit volume.

Given data:

The density of ethanol = 0.7890 g/mL

The density of water = 0.9982 g/mL

The density of mixture = 0.926 g/mL

Let the % composition of ethanol = x

Let the % composition of water = 100-x

Now density of the mixture

\frac{Mass}{Volume}

Mass = \frac{percent  \;of  \;ethanol  \;X  \;density  \;of  \;ethanol  \;+  \\ \;percent  \;of  \;water X  \;density  \;of  \;water}{100}

0.926 = \frac{x X  0.7890 g/mL  \;+  (100-x) X  0.9982 g/mL}{100}

x= 34.51 %

Hence,

% composition of ethanol = 34.51%

% composition of water = 65.49%

Learn more about the density here:

brainly.com/question/952755

#SPJ1

8 0
2 years ago
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