3 years ago

Which of the following is a compound that contains 2 different elements?

Chemistry

1 answer:

AfilCa [17]3 years ago

7 0

Chlorine is the correct answer so A

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What is the main difference between weathering and erosion?

aev [14]

Answer:

D. Weathering includes the transportation of sediment while erosion does not.

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3 years ago

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Air enters a diffuser witha velocity of 400 m/s, a pressure of 1 bar and temperature of 25 C. It exits with a temperature of 100

ANEK [815]

Answer:

Exit velocity of air is 96.43 m/s.

Explanation:

Given that

$V_1=400\ m/s$

$T_1=25C$

$T_2=100C$

For air

$C_p=1.005\ KJ/kg.K$

Now from first law of thermodynamics for open system at steady state

$h_1+\dfrac{V_1^2}{2000}+Q=h_2+\dfrac{V_2^2}{2000}+w$

For diffuser

$h_1+\dfrac{V_1^2}{2000}=h_2+\dfrac{V_2^2}{2000}$

We know that

$h=C_pT$

$h_1+\dfrac{V_1^2}{2}=h_2+\dfrac{V_2^2}{2000}$

$1.005\times 25+\dfrac{400^2}{2000}=1.005\times 100+\dfrac{V_2^2}{2}$

$V_2=96.43\ m/s$

So the exit velocity of air is 96.43 m/s.

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4 years ago

PLEASEEE HELPPPPP

Len [333]

Hi my dear friend,

Because we must add heat, boiling water is a process that chemists call endothermic. Clearly, if some processes require heat, others must give off heat when they take place. ... Changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing.

~Thank you

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All animals make body heat. True or false?

gladu [14]

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False

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Some animals are cold blooded

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How many moles are in 78.8 g of potassium sulfite?

exis [7]

Answer:

158.2598

Explanation:

158.2598 moles are in 78.8 g of potassium sulfite

CARRY ON LEARNING

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3 years ago