The given units are the units of masses which are interconvertable.
It is given that:
Now, converting :
Since,
So,
Now converting :
Since, 1 kg = 1000 g
So,
For :
Thus, of ointment needed to be prepared by the pharmacist.
How many moles of hydrogen gas(H2) are needed to react with 15 moles of chlorine gas
1 answer:
Answer:
15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.
Explanation:
The balanced reaction is:
H₂ (g) + Cl₂ (g) → 2 HCl (g)
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of the compounds participate in the reaction:
- H₂: 1 mole
- Cl₂: 1 mole
- HCl: 2 moles
Then you can apply the following rule of three: If 1 mole of Cl₂ reacts with 1 mole of H₂, 15 moles of Cl₂ with how many moles of H₂ does it react?
moles of H₂= 15
<u><em>15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.</em></u>
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Answer:
q = - 2067.2 J of Heat is giving out when 85.0g of lead cools from 200.0 c to 10.0 c.
Explanation:
The Specific Heat capacity of Lead is 0.128
This means, increase in temperature of 1 gm of lead by will require 0.128 J of heat.
Formula Used :
q = amount of heat added / removed
m = mass of substance in grams = 85.0 g
c = specific heat of the substance = 0.128
= Change in temperature
= final temperature - Initial temperature
= 10 - 200
= -
put value in formula
q = -
On calculation,
q = - 2067.2 J
- sign indicates that the heat is released in the process