Integer i think but i not sure
Answer:
(a) The volume of water in the quarry is 6.496 x 10⁷ m³.
(b) The total mass of mercury is 1.19 x 10⁻³ kg.
Explanation:
(a) The volume of water can be calculated like:
Volume = depth x surface
In order to have coherence between units we will use proportions to transform km² to m².
Then,
Volume = 22.50 m x 2.887 x 10⁶ m² = 6.496 x 10⁷ m³
(b) We can find out the total mass of mercury using proportions. We will need these relations:
1 L = 10⁻³ m³
1 pg = 10⁻¹² g
1 kg = 10³ g
The answer is true because during the industrial revolution is when factories became ran buy machines and used fossil fuels to run.
Answer: 0.87 g of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel.
Explanation:
According to the dilution law,
where,
= concentration of ist progesterone gel = 8%w/w
= weight of ist progesterone gel = x g
= concentration of another progesterone gel = 4% w/w
= weight of another progesterone gel = 1.45 g
= concentration of resulting progesterone gel = 5.5%w/w
= weight of resulting progesterone gel = (x+1.45) g
Thus 0.87 g of an 8% w/w progesterone gel must be mixed with 1.45 g of a 4% w/w progesterone gel to prepare a 5.5% w/w gel.
Answer:
Overall cell notation
Cr2^+(aq)/Cr3^+(aq)// Co^2+(aq)/ Co(s)
Explanation:
Let us consider the two half reaction equations:
Oxidation half equation:
2Cr^2+(aq) -------> 2Cr^3+(aq) + 2e
Reduction half equation:
Co^2+(aq) + 2e --------> Co(s)
Overall reaction equation:
2Cr^2+(aq) + Co^2+(aq) ----> 2Cr^3+(aq) + Co(s)
Overall cell notation
Cr2^+(aq)/Cr3^+(aq)// Co^2+(aq)/ Co(s)