Assuming that the reactants are:
(NH4)2SO4 (aq) + Ba(NO3)2 (aq)
and the products are:
BaSO4 (s) + 2NH4NO3 (aq),
then you will have to determine which product is insoluble. You should have access to solubility rules to help you determine this.
According to the solubility rules, the following elements are considered insoluble when paired with SO4:
Sr^2+, Ba^2+, Pb^2+, Ag^2+, and Ca^2+
Therefore, the precipitate will be BaSO4 (s).
The first step with any of these problems is putting the mass in grams in terms of moles. How many moles of water are represented by 2.46 g of water? The relationship is the molar mass of water, which is about 18 g/mol. So dimensional analysis shows that 2.46 g water = 2.46 g/18 g = 0.0556 moles of water. That's part a.
Answer:
Explanation:
1 : apple sliced : the apple was cut into smaller peices : physical change
2 : smashed apple : the apple became a mush : physical change
3 : paper burned : the paper became ash : chemical change
4 : glow stick snapped : the glow stick started glowing : chemical change
5 : apple being burned : the apple became discoloured and turned coal-like : chemical change
_____
2. it does not alter the chemical make up of the apple
3. because it changes to a new substance entirely, changing the chemical make up of the paper to make it something new
4. smashing the apple, because you mash up the apple with your teeth in your mouth
5. The apple being burned is being chemically broken down to form a new substance, the same way your stomach digests food to break down and use for other reasons.
Answer:
Lungs
Explanation:
If blood pressure is almost normal in a person who has lost blood.