We know that:
- It is a constant-pressure calorimeter
- the temperature of 60.0 g of water increases by 4.50 °C
- Specific heat capacity of water = 4.2 J/goC
And we must find the amount of heat that is transferred to the water.
To find it, we need to use the formula for heat absorbed
Where,
Q represents the heat absorbed by the water
m represent the mass
Cp represents specific heat, in this case of the water
(T2 - T1) represents the variation of the temperature
Using the given information, we know that:
m = 60.0 g
Cp = 4.2[J/(g°C)]
(T2 - T1) = 4.50 °C
Now, replacing in the formula
Finally, we can convert J to KJ
ANSWER:
B. 1.13 KJ
Answer:
6.50 grams of the compound X is nitrogen
Explanation:
Step 1: Data given
Mass of compound X = 37.8 grams
Compound contains 17.2 % N
Step 2: Calculate mass of nitrogen
Mass nitrogen = % Nitrogen * total mass
Mass nitrogen = 17.2 % * 37.8 grams = 0.172 * 37.8 grams
Mass nitrogen = 6.50 grams
6.50 grams of the compound X is nitrogen
Answer:
1. molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere
2. A
3. D
4. C
5. C
6. C
7. C
8. B
9. Sorry I don't know :(
10. B
11. A
12. C
13. Sorry :((
14. C
15. a
16. d
Sorry I don't know the rest.. I hope this helps though!!
Answer:
Double replacement:
Explanation:
Chemical equation:
2AsCl + 3H₂S → As₂S₃ + 6HCl
The given reaction is double displacement reaction. In this reaction arsenic trichloride and hydrogen sulfide react and produced arsenic sulfide and hydrogen chloride. In double displacement reaction both anion an cation of reactants are exchanged with each other.
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
General equation:
AB + CD → AD +CB
