What type of reaction releases energy in the form of heat and sometimes light?
Answer: Exothermic Energy
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Answer:
On the farm there are 70 chickens.
Explanation:
We can directly <u>work out the number of ducks from the given number of pigs</u>, with the <em>ratio of ducks to pigs</em>:
- 36 pigs *
= 20 ducks
Then we<u> work out the number of chickens</u>, using the ration of chickens to ducks:
- 20 ducks *
= 70 chickens
If on the farm there are 36 pigs, there are 70 chickens as well.
To determine the molar mass of the unknown gas, we use Graham's Law of Effusion where it relates the effusion rates of two gases with their molar masses. It is expressed as r1/r2 = √M2/M1. We calculate as follows:
Let 1 = argon gas
2 = unknown gas
r2 = 0.91r1
r1/r2 = 1/0.91
1/0.91 = √M2/M1 = √M2/40
M2 = 48.30 g/mol
Answer:
Magnetic domains fall into alignment and it begins to attract other objects.
1s2 2s2 2p6 3s2 3p6 4s2 is the electron configuration for Calcium