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denis23 [38]
3 years ago
7

5. How many grams of potassium bromide will dissolve in 450g of water at 80°C?

Chemistry
1 answer:
Shtirlitz [24]3 years ago
6 0
Hi mate. I think the answer is 100
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Molecules cannot react chemically unless they are...... a) polar b)solvents d)in solution
OlgaM077 [116]

Answer:

Answer will be a as I thi

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4 years ago
You are given 1.0 mL of the enzyme amylase and need to add cold 95% ethanol to reach a final concentration of 40% ethanol in the
Furkat [3]

Answer:

0,727 mL

Explanation:

We add x mL of the 95% ethanol solution to 1 mL: C1=0,95 and V1=x mL

As we already had 1 ml of solution, now we'll have (1 + x) mL of the 40% ethanol solution: C2=0,4 and V2=1+X mL

Now, using the C1V1=C2V2 equation:

(0,95)x=0,4(x+1)

0,95x=0,4x + 0,4

0,95x-0,4x=0,4

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x=0,4/0,55=0,727 mL

Therefore, we need to add 0,727 mL of a 95% ethanol solution to the enzyme solution to obtain a final concentration of 40% ethanol.  

6 0
4 years ago
A major component of gasoline is octane, C8H18. When octane is burned in air, it chemically reacts with oxygen gas (O2) to produ
ddd [48]

Answer:

m_{CO_2}=2.8gCO_2

Explanation:

Hello,

In this case, the combustion of octane is chemically expressed by:

C_8H_{18}+\frac{25}{2} O_2\rightarrow 8CO_2+9H_2O

In such a way, due to the 25/2:8 molar ratio between oxygen and carbon dioxide, we can compute the yielded grams of carbon dioxide (molar mass 44 g/mol) as shown below:

m_{CO_2}=3.2gO_2*\frac{1molO_2}{32gO_2} *\frac{8molCO_2}{\frac{25}{2}molO_2 } *\frac{44gCO_2}{1molCO_2}\\ \\m_{CO_2}=2.8gCO_2

Best regards.

3 0
3 years ago
The mass of a block is 2.5 g the volume of the block is 4.1 mL.  what is the density of the block
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Answer:

6.6g

Explanation:

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Explain why cis−1−chloro−2−methylcyclohexane undergoes E2 elimination much faster than its trans isomer.
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Both chloro and methyl groups axial
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4 years ago
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