Answer:
D
Explanation:
single replacement....iron combined with tetraoxosulphate (VI)
What are the mol ratios? if you’re just comparing with the mass (which i doubt so since most limiting questions require u to compare the mols)
but if u are, the limiting would be nitrogen since it’s lesser than calcium mass
Answer:
7% 4)2(10
Explanation:
beacouse if you divide it you can get the answer
Answer: Payback time = 0.0075
Explanation: Since payback time is calculated as:
payback time =
First determine the installation cost:
100 mm thick insulation covers 8.3 m². Then 300 mm covers 24.9 m².
To cover 8.3m² costs £20. Then, the cost to cover 24.9 m² is:
cost =
cost = £60
The cost of putting the insulation is £120, so the total cost is:
total cost = £60 + £120
total cost = £180
Savings per year per 100 mm thick is £80. For 300 mm, the value of annual savings is:
savings =
savings = 240
payback time =
payback time =
payback time = 0.75