Answer:
Bring to the boil. Carefully place the can in the saucepan, ensuring there's enough water to completely cover the can at all times, topping up water frequently throughout the cooking process. Simmer, uncovered for 3 hours.
Answer:
Aluminum atomic number= 13
electron configuration = 2, 8 , 3
Hope it helps...........
Four significant figures would be B. Because 0's before the decimal are not important, but 0's after the decimal are.
Because the whole west coast is on the "ring of fire" witch has high volcanic activety and junk like that
Answer:
m = 2 g
Explanation:
Given data:
Initial temperature = 45°C
Final temperature = 35°C
Heat evolved = 84 j
Mass of water = ?
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
specific heat capacity of water is 4.18 J/g.°C
ΔT = 35°C - 45°C
ΔT = - 10°C
84 j = m ×4.18 J/g.°C ×- 10°C
84 j = m × -41.8 J/g
m = 84 j / -41.8 J/g
m = 2 g
negative sign shows heat is evolved.
