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ratelena [41]
3 years ago
8

4. Calculate the mass of each element:

Chemistry
1 answer:
olga2289 [7]3 years ago
5 0
A) 13g
b) 2.68g (2dp)
c) 51.87g

Tip: mass = moles x Mr
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sashaice [31]

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8 0
2 years ago
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What is the molar mass of Al^2(SO^4)3
borishaifa [10]
342.14 g/mol

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Molar mass of S=32.06
Molar mass of O=16.00

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7 0
3 years ago
How much energy is required when a 142.1 gram sample of aluminum goes from 25.5°C to 46°C? (the specific heat of aluminum is 0.9
vfiekz [6]

Answer:

2621.75 j heat is required to increase the temperature 25.5°C to 46°C.

Explanation:

Given data:

Mass of sample = 142.1 g

Initial temperature = 25.5°C

Final temperature = 46°C

Specific heat capacity of Al = 0.90 J/g.°C

Solution:

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

ΔT = 46°C - 25.5°C

ΔT = 20.5°C

Q = 142.1 × 0.90 J/g.°C × 20.5°C

Q = 2621.75 j

Thus,  2621.75 j heat is required to increase the temperature 25.5°C to 46°C.

4 0
3 years ago
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Answer:

8.3 g of NaCl

Explanation:

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3 0
2 years ago
Which of the following is not part of daltons atomic theory
pentagon [3]
Atoms of an element are alike.
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3 years ago
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