Answer:
Final temperature of the mixture is 50°C
Explanation:
This is a typical calorimetry problem, where the heat yielded by a compound is immediately won by another.
Water at 90°C raise the temperature of water at 10°
Density of water = 1g/mL
Mass of water = 100 g, because the volume is 100mL
If the two pieces of water are in a calorimeter where heat is not released or gained, the sum of both heats is 0
4.18 J/g°C . 100 g ( T°final - 90°C) + 4.18 J/g°C . 100 g ( T°final - 10°C) = 0
418 J/°C T°final - 37620 J + 418 J/°C T°final - 4180J = 0
836 J/°C T°final - 37620J - 4180J = 0
836 J/°C T°final = 41800J
T°final = 41800J / 836 °C/J = 50°C
Answer:
are produces are in a month.
Explanation:
Quantity of eggs produced by the chicken in a month = 284 dozens
1 dozen = 12 eggs
Number of eggs in a month:
are produces are in a month.
Answer:infred radiation cuases cancer and eletromagnetic waaves is how the sun travels it heat then visibel light is the light the human can see ultravilight radiation takes for of heat
Explanation:
Answer:
2.01 moles of P → 1.21×10²⁴ atoms
2.01 moles of N → 1.21×10²⁴ atoms
4.02 moles of Br → 2.42×10²⁴ atoms
Explanation:
We begin from this relation:
1 mol of PNBr₂ has 1 mol of P, 1 mol of N and 2 moles of Br
Then 2.01 moles of PNBr₂ will have:
2.01 moles of P
2.01 moles of N
4.02 moles of Br
To determine the number of atoms, we use the relation:
1 mol has NA (6.02×10²³) atoms
Then: 2.01 moles of P will have (2.01 . NA) = 1.21×10²⁴ atoms
2.01 moles of N (2.01 . NA) = 1.21×10²⁴ atoms
4.02 moles of Br (4.02 . NA) = 2.42×10²⁴ atoms