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3 years ago

When barium hydroxide and ammonium chloride react,the temperature of the mixture decreases.What kind of reaction is this?

Chemistry

1 answer:

GalinKa [24]3 years ago

7 0

Answer:

Endothermic

Explanation:

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Please can you answer question 10

lakkis [162]

21 grams
$166.0 - 145 = 21$

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3 years ago

A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.

fomenos

Answer:

The heat released by the combustion is 20,47 kJ

Explanation:

Bomb calorimeter is an instrument used to measure the heat of a reaction. The formula is:

Q = C×m×ΔT + Cc×ΔT

Where:

Q is the heat released

C is specific heat of water (4,186kJ/kg°C)

m is mass of water (1,00kg)

ΔT is temperature change (23,65°C - 20,45°C)

And Cc is heat capacity of the calorimeter (2,21kJ/°C)

Replacing these values the heat released by the combustion is:

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3 years ago

Which one of the following is a common acid?

Assoli18 [71]

I think it’s C.Vinegar but not sure hope this helps

8 0

4 years ago

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Convert 600 m to mm.

anzhelika [568]

Answer:

600,000

Explanation:

In order to convert meters or metre to millimeter or millimetre, you must multiply the meter/metre by 1000. (Some countries say meter and others say metre.) Hope it helps! <3

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3 years ago

Lemon juice has a pH of about 2.0, compared with a pH of about 1.0 for stomach acid. Therefore, the concentration of H+ in stoma

LuckyWell [14K]

Answer:

The concentration of H⁺ in stomach acid is approximately ten times greater than that of lemon juice.

Explanation:

The H⁺ concentration of a solution is exponentially related to its pH value:

$\rm [H^{+}] = 10^{-pH}$ .

For lemon juice:

$\rm [H^{+}] = 10^{-2.0} = 0.01\; M$ .

For stomach acid:

$\rm [H^{+}] = 10^{-1.0} = 0.1\; M$ .

Thus, the concentration of H⁺ in stomach acid is approximately ten times greater than that of lemon juice.

5 0

3 years ago

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