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kogti [31]
3 years ago
14

What does the symbol (–Delta.Hfus) indicate in a phase change?

Chemistry
1 answer:
Rufina [12.5K]3 years ago
8 0

Answer:

changes from a solid to a liquid

Explanation:

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Name gaseous element in period 2 group 16?
Sholpan [36]

Answer:

mark me as a brainlist answer

Explanation:

Oxygen

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3 years ago
In the chemical formula below, how many H atoms are present?<br> SNH4OH
saul85 [17]

Answer:

I believe there is 2 but I could be wrong so really sorry if I am

3 0
3 years ago
15.5 g of an unknown metal at 165.0°C is dropped into 150.0mL of H2O at 23.0°C in a coffee cup calorimeter. The metal and H2O re
tino4ka555 [31]

Answer:

Specific heat capacity of metal is 2.09 j/g.°C.

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Given data:

Mass of metal = 15.5 g

Initial temperature = 165.0°C

Initial temperature of water = 23.0°C

Final temperature = 30.0°C

Specific heat capacity of metal = ?

Specific heat capacity of water = 4.184 J/g°C

Volume of water = 150.0 mL or 150.0 g

Solution:

Formula:

- Qm  =  +Qw

Now we will put the values in formula.

-15.5 g × c × [ 30.0°C - 165.0°C] = 150 g × 4.184 J/g°C × [ 30.0°C - 23.0°C]

15.5 g × c × 135°C = 4393.2 j

2092.5 g.°C  × c = 4393.2 j

c = 4393.2 j/2092.5 g.°C  

c = 2.09 j/g.°C  

4 0
3 years ago
Convert 7.72 years into days.
Lelu [443]

Answer:2817.8

Explanation:multiply the value by 365

4 0
3 years ago
Read 2 more answers
Elements in Group 4A
steposvetlana [31]

Answer:

helium hydrogen

Explanation:

lithium beryllium bottom carbon

6 0
3 years ago
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