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3 years ago

A student melts 50.0 grams of ice using 16650 J of energy. What is the heat of fusion of ice?

Chemistry

1 answer:

Arlecino [84]3 years ago

7 0

heat of fusion = 16650 J / 50 g = 333 J/g

Thus, the heat of fusion of the ice is 333 J/g.

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Which one is an expression of distance in Sl units?

Svetllana [295]

Answer:

500 meters

Explanation:

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3 years ago

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A silver block, initially at 57.2 ∘C, is submerged into 100.0 g of water at 24.8 ∘C, in an insulated container. The final temper

Masteriza [31]

Answer:

96.5 grams is the mass of the silver block.

Explanation:

Heat lost by iron will be equal to heat gained by the water

$-Q_1=Q_2$

Mass of iron = $m_1=?$

Specific heat capacity of silver= $c_1=0.240 J/g^oC$

Initial temperature of the silver= $T_1=120^oC$

Final temperature = $T_2=T=26.5^oC$

$Q_1=m_1c_1\times (T-T_1)$

Mass of water= $m_2=100.0 g$

Specific heat capacity of water= $c_2=4.184 J/g^oC$

Initial temperature of the water = $T_3=24.8 ^oC$

Final temperature of water = $T_2=T=26.5^oC$

$Q_2=m_2c_2\times (T-T_3)$

$-Q_1=Q_2$

$-(m_1c_1\times (T-T_1))=m_2c_2\times (T-T_3)$

On substituting all values:

$-(m_1\times 0.240 J/g^oC\times (26.5^oC-57.2^oC))=100.0 g\times 4.184 J/g^oC\times (26.5^oC-24.8^oC)$

we get, $m_1 = 96.5 g$

96.5 grams is the mass of the silver block.

5 0

3 years ago

2.(04.01 LC)

Mila [183]

Answer:

2KClO3 —> 2KCl + 3O2

The coefficients are 2, 2, 3

Explanation:

From the question given above, we obtained the following equation:

KClO3 —> 2KCl + 3O2

The above equation can be balance as follow:

There are 2 atoms of K on the right side and 1 atom on the left side. It can be balance by putting 2 in front of KClO3 as shown below:

2KClO3 —> 2KCl + 3O2

Now, the equation is balanced.

Thus, the coefficients are 2, 2, 3

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3 years ago

Cells that produce antibodies that help destroy the pathogens are called what

SOVA2 [1]

Antibodies are produced by a type of white blood cell called a plasma cell.

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3 years ago

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How many moles of NaCl are equivalent to 15.6<br> grams of NaCl

NeX [460]

One mole of NaCl has a mass of approximately 58.5 grams. This gives it a conversion factor of 1/58.5

Hope This Helped

4 0

4 years ago