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2 years ago

Quick question: Are water molecules attracted to each other because of the polar nature of water?

Chemistry

1 answer:

Colt1911 [192]2 years ago

4 0

Answer:

Because the opposite charge between them

Explanation:

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A 40.2 g sample of a metal heated to 99.3Â°C is placed into a calorimeter containing 120 g of water at 21.8Â°C. The final temper

aliina [53]

Answer:

B) Iron (c=0.45 J/g°C)

Explanation:

Given that:-

Heat gain by water = Heat lost by metal

Thus,

$m_{water}\times C_{water}\times (T_f-T_i)=-m_{metal}\times C_{metal}\times (T_f-T_i)$

Where, negative sign signifies heat loss

Or,

$m_{water}\times C_{water}\times (T_f-T_i)=m_{metal}\times C_{metal}\times (T_i-T_f)$

For water:

Mass = 120 g

Initial temperature = 21.8 °C

Final temperature = 24.5 °C

Specific heat of water = 4.184 J/g°C

For metal:

Mass = 40.2 g

Initial temperature = 99.3 °C

Final temperature = 24.5 °C

Specific heat of metal = ?

So,

$120\times 4.184\times (24.5-21.8)=40.2\times C_{metal}\times (99.3-24.5)$

$40.2C_{metal}\left(99.3-24.5\right)=120\times \:2.7\times \:4.184$

$40.2C_{metal}\left(99.3-24.5\right)=1355.616$

$C_{metal}=0.45\ J/g^0C$

This value corresponds to iron. Thus answer is B.

3 0

2 years ago

Why doesn’t the moon move away from earth

Leni [432]

The earth has the moon captured in its gravity. this keeps the moon in an elliptical orbit

8 0

2 years ago

What are some of the main ways to add energy to a reaction? plzzz help

Tresset [83]

Answer:

Heat.

Light.

Sound.

Electricity

Explanation:

4 0

1 year ago

How many grams of N2 are in 44.8L at STP?

lutik1710 [3]

Answer: 10 i think

Explanation:

3 0

2 years ago

Why are alkali metals so reactive?

Savatey [412]

Answer:

Alkali metals are among the most reactive metals. This is due in part to their larger atomic radii and low ionization energies. They tend to donate their electrons in reactions and have an oxidation state of +1. ... All these characteristics can be attributed to these elements' large atomic radii and weak metallic bonding.

Explanation:

I hope it will help you.....

#CARRYONLERANING

8 0

1 year ago