Answer:
The device shown is a calorimeter that used to measure the heat transfer by a reaction under constant volume.
Explanation:
First, you need to find the number of moles of OH⁻ in a 250mL solution of 0.100M OH⁻. To do this, multiply 0.250L by 0.100M to get 0.025mol OH⁻. Then you use the fact that 1 mole of Sr(OH₂)·8H₂O contains 2 moles of OH⁻ which means that 0.0125mol of Sr(OH)₂·8H₂O contains 0.025mol OH⁻ (0.025/2=0.0125). Then to find the amount of Sr(OH)₂·8H₂O is needed you multiply its molar mass (265.76g/mol) by 0.0125mol to get 3.322g.
Therefore you need 3.322g of Sr(OH)₂·8H₂O.
I hope that helps. Let me know if anything is unclear.
Answer:
It's 0.07
Explanation:
1.65/23
Cause three me formula is mass upon the molecular mass so when you divide them you would get 0.07
I believe it's (C) Endothermic reaction
Explanation:
When energy is absorbed in an endothermic reaction, the temperature decreases.
Fish will reproduce both ways