Answer:
4 moles of H₃PO₄
Explanation:
The reaction expression is given as;
3KOH + H₃PO₄ → K₃PO₄ + 3H₂O
Number of moles of water = 12moles
Unknown:
Number of moles of H₃PO₄ = ?
Solution:
From the balanced reaction expression we see that;
3 moles of water is produced from 1 mole of H₃PO₄
So; 12 moles of water would be produced from 
= 4 moles of H₃PO₄
I don’t understand. Is there a picture? Where are the options?
Explanation:
Nickel(II) nitrate = Ni(NO3)2
Sodium Chloride = 2NaCl
Sodium Nitrate = 2NaNO3
Nickel(II) Chloride = NiCl2
Balanced equation :
Ni(NO3)2 + 2NaCl → 2NaNO3 + NiCl2
Complete Ionic equation:
Ni2+(aq) + 2NO3-(aq) + 2Na+(aq) + 2Cl-(aq) = 2Na+(aq) + 2NO3-(aq) + Ni2+(aq) + 2Cl-(aq)
Net ionic equation:
The balanced net ionic equation includes only species that are involved in the reaction. It can be found by removing ions that occur on both the reactant and product side of the complete ionic equation.
All the ions are spectator ions so there is no reaction.
Answer:
4:00 a.m.
Explanation:
The east coast is 3 hours ahead of the west coast
Statement:
The best way to measure the mass of an orange is to use a balance. You put the orange and the mass pieces in the same cup on the balance and find out how many centimeters it is. The mass of my orange was 145.
Explanation:
Problem 1
The student has not done a good job in measuring the weight of the orange. In fact, the has complicated his simple problem.
Reasons:
- Using the mass pieces and the cup to find the weight of the orange is wrong approach.
He can easily place the orange on the balance and read off the weight.
- Centimeters is a unit of length. What length is he measuring and recording?
The unit of weight is in newtons(N).
- Mass is not read from a balance. A balance gives the weight of substance. Mass is different from weight.
Problem 2
Rewriting to paragraph to correct the errors:
The best way to measure the mass of an orange is to use a balance. You put the orange on the balance and find out how many newtons it is. The weight in newtons can be converted to mass in kilogram. The mass of my orange will be 145kg.
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