3 years ago

Wat two common uses for Zinc???

1 answer:

5 0

Answer:

Zinc oxide is used in the manufacture of many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.

Explanation:

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Which conditions will increase the rate of a chemical reaction?

Nata [24]

Answer:

je suis nulle en franglais

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3 years ago

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

balandron [24]

Answer:

The final temperature of the water is 22.44°C.

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

$q_2=m_2c_2\times (T-T_3)$

$-q_1=q_2$ (Law of Conservation of energy)

$-(m_1\times c_1\times (T-T_1))=m_2\times c_2\times (T-T_3)$

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

The final temperature of the water is 22.44°C.

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3 years ago

What is the density of a 32g toy car that<br> has a volume of 8cm3?<br> A. 256alcm3<br> An3

Greeley [361]

Answer:

density=mass/volume

density=32/8

density=4

8 0

3 years ago

The two beakers contain water.

lord [1]

Answer:

STUDY!

Explanation:

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3 years ago

Balance the following equation __N2+__O2→__N2O

kakasveta [241]

Answer:

2N2+02>_2N20

Explanation:

u have to use rap formula

4 0

3 years ago