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3 years ago

Practice It!

Chemistry

2 answers:

ASHA 777 [7]3 years ago

5 0

^ this guy is right.

Ostrovityanka [42]3 years ago

4 0

Answer:

Explanation:

Space exploration technology has helped us explore the Moon and see images of far off galaxies.

Space technology may help us inhabit another planet or live in space in the future.

These are the correct statements

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A chunk of tin weighing 18.5 grams and originally at 97.38 °C is dropped into an insulated cup containing 75.7 grams of water at

weqwewe [10]

Answer:

22.44°C will be the final temperature of the water.

Explanation:

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

$-Q_1=Q_2$

Mass of tin = $m_1=18.5 g$

Specific heat capacity of tin = $c_1=0.21 J/g^oC$

Initial temperature of the tin = $T_1=97.38^oC$

Final temperature = $T_2$ =T

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

Mass of water= $m_2=75.7 g$

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

Initial temperature of the water = $T_3=21.52^oC$

Final temperature of water = $T_2$ =T

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

$-Q_1=Q_2$

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

On substituting all values:

$-(18.5 g\times 0.21 J/g^oC\times (T-97.38^oC))=75.7 g\times 4.184 J/g^oC\times (T-21.52 ^oC)$

we get, T = 22.44°C

22.44°C will be the final temperature of the water.

5 0

3 years ago

If the temperature is below zero, what will the precipitation most likely be?

Leviafan [203]

Answer: C Snow

Explanation:

Because the temperature is low and it is below freezing temperature. Sorry if I am wrong.

7 0

2 years ago

Which describes a property of all elements?

Kaylis [27]

This would be c as for the amswer

3 0

3 years ago

What two molecules make up sucrose?

SOVA2 [1]

Answer:

glucose and fructose

Explanation:

Sucrose is a disaccharide (a kind of sugar made of two monosaccharides) made of glucose and fructose

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2 years ago

Convert the following mole of ratio of elements to empirical formula 2.0 mol of Fe and 2.66 mol of O

Pavlova-9 [17]

Your answer = 3.2 .. thank you

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3 years ago