Answer:
Mass = 28.59g
Explanation:
Q = 952J
Change in temperature = 37.0°C
Specific heat capacity = 0.90J/g°C
Mass = ?
Heat Energy (Q) = mc∇T
Q = heat energy
M = mass of substance
C = specific heat capacity of substance
∇T = change in temperature of substance
Q = mc∇T
952 = m × 0.90 × 37
952 = 33.3m
Solve for m
M = 952 / 33.3
M = 28.59g
The mass of aluminium required to use a heat energy of 952J is 28.59g
Given 3.72 g of P and 21.28g of Cl, converting these to moles: ( 3.72 g P)(mol P/30.97 g P) = 0.12 mol P (21.28 g Cl)(mol Cl/35.45 g Cl) = 0.60 mol Cl P:Cl = 0.12/0.60, therefore P: Cl =1/5 Therefore, PCl5 hope it helps
Energy= 2381 joules
heat= Mass(kg) *change in temperature(K) * Cp
2381=0.155*(15)*Cp
Cp=1024 J/kg K
Answer:D. Nitrates
Explanation:
Nitrates enter the environment from fertilizers, sewage, or human and animal waste.
Therefore
Farms, golf courses and domestic gardens blame nitrates for contamination.