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seraphim [82]
3 years ago
14

At what temperature does the solid start meltin -20°C 0°C 20" 80°C

Chemistry
1 answer:
marissa [1.9K]3 years ago
5 0

Answer:

0 C.

Explanation:

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internal fertilization

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A sample of (NH4)2SO4 contains 0.750 mole. what is the mass of the sample​
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The decomposition of a compound at 400⁰C is first order with half-life of 1570 seconds. what fraction of an initial amount of th
kirill115 [55]

Answer: After 4710 seconds, 1/8 of the compound will be left

Explanation:

Using the formulae

Nt/No = (1/2)^t/t1/2

Where

N= amount of the compound  present at time t

No= amount of compound present at time t=0

t= time taken for N molecules of the compound to remain = 4710 seconds

t1/2 = half-life of compound  = 1570 seconds

Plugging in the values, we have  

Nt/No = (1/2)^(4710s/1570s)

Nt/No = (1/2)^3

Nt/No= 1/8

Therefore after 4710 seconds, 1/8 molecules of the compound will be left

5 0
3 years ago
Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous.
Orlov [11]

Answer:

B

Explanation:

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the answer and explanation is in the picture

hope this helps

please like and Mark as brainliest

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4 years ago
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