Answer:
Q = 1147.5 cal
Explanation:
Given data:
Energy absorbed = ?
Mass of water = 75 g
Initial temperature = 22.5°C
Final temperature = 37.8°C
Specific heat of water = 1 cal/g.°C
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = T2- T1
ΔT = 37.8°C - 22.5°C
ΔT = 15.3 °C
Q = m.c. ΔT
Q = 75 g . 1 cal/g.°C . 15.3 °C
Q = 1147.5 cal
Answer:
i think so 1 and 3 is the correct answer...................
Answer:
0.404 mol / L
Explanation:
The <em>total moles of barium chloride</em> can be calculated from <em>the volume and concentration of the stock solution</em>:
1.39 mol/L * 0.180 L = 0.2502 moles barium chloride
Now we <u>calculate the concentration of the working solution, by dividing the total moles by the final volume</u>:
0.2502 mol / 0.620 L = 0.404 mol / L
Answer:Boron
Explanation:
it is element 5 represented by the letter B
cytoplasm
cell membrane
nucleus (unless bacteria)
DNA
mitochondria (unless root hair cell)
