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3 years ago

3. What is the volume of a rectangular solid that is 40 centimeters long, 10 centimeters wide, and 5

Chemistry

1 answer:

igomit [66]3 years ago

4 0

Answer:

D) 2000 cm^3

Explanation:

V=Length× Width× Height =40cm ×10cm ×5cm=2000 cm^3

Note: It will be cm^3 not cm.

Hope, this helps you.

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A gas is collected at 30 Celsius and has a pressure of 200 kPa. What pressure would it exert if the temperature changed to 40 Ce

garik1379 [7]

Answer:

$206.6\ \text{kPa}$

Explanation:

$P_1$ = Initial pressure = 200 kPa

$P_2$ = Final pressure

$T_1$ = Initial temperature = $30^{\circ}\text{C}$

$T_2$ = Final temperature = $40^{\circ}\text{C}$

We have the relation

$\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=\dfrac{T_2}{T_1}P_1\\\Rightarrow P_2=\dfrac{40+273.15}{30+273.15}\times 200\\\Rightarrow P_2=206.6\ \text{kPa}$

The pressure that would be exerted after the temperature change is $206.6\ \text{kPa}$ .

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3 years ago

Which reaction is the opposite of a decomposition reaction?

tresset_1 [31]

Answer:

B) Synthesis reaction

Explanation:

synthesis reactions because they take apart larger molecules or compounds

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3 years ago

Zinc and sulfuric acid solution produce zinc sulfate solution and hydrogen balanced chemical equation

IRISSAK [1]

Answer:

Zn + H2SO4 → ZnSO4 + H. 2

Explanation:

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3 years ago

How many grams of Cl are in 465g of CaCl2

Rama09 [41]

2 ways to do this
a. find %Cl in CaCl2
2 x 35.45g/mole = 70.9g Cl
70.9g Cl / 110.9g/mole CaCl2 = 63.93% Cl in CaCl2
0.6963 x 145g = 92.7g = mass Cl

b. determine moles CaCl2 present then mass Cl
145g / 110.9g/mole = 1.31moles CaCl2 present
2moles Cl / 1mole CaCl2 x 1.31moles = 2.62moles Cl
2.62moles Cl x 35.45g/mole = 92.7g Cl

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3 years ago

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What earths layer is broken up like puzzle pieces

lilavasa [31]

The crust because there are tectonic plates.

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3 years ago