Answer:
Calcium (Ca²⁺)
Explanation:
Calcium is very important mineral, found in teeth and bones primarily.
It is needed for the strong bones.
It is very important to maintain the bones in order to support our skeleton.
In our body it is also important to carry out other functions like in muscles, nerve function and also for heart.
If our diet is not full of calcium, the calcium deficiency may occur which leads to the weakening of bones and cause fracture.
The dietary source of calcium includes:
Yogurt, cheese, milk
beans such as peas, peanuts.
fishes
almonds, oranges, molasses
Answer:
4 lead = Pb
2 nitrogen = N
6 oxygen = O
Explanation:
Know the rules of multiplying wth perentheses.
- Hope that helped! Please let me know if you need further explanation.
Answer:
0.6257 M is the molarity of solution that is 5.50 percentage by mass oxalic acid.
Explanation:
Mass percentage of oxalic acid = 5.50%
This means that in 100 grams of solution there are 5.50 grams of oxalic acid.
Mass of solution , m = 100
Volume of the solution = V
Density of the solution = d = 1.024 g/mL
V = 97.66 mL = 0.09766 L
(1 mL = 0.001 L)
Moles of oxalic acid = 
The molarity of the solution :
0.6257 M is the molarity of solution that is 5.50 percentage by mass oxalic acid.
The correct answer is: [A]: "<span>points with the same elevation" .
________________________________________________________</span>
The number of moles of one substance given the amount in mass can be calculated by the use of the molar mass. This is the mass of a compound per 1 mol of the said substance. For, KCl the molar mass is 74.55 g/ mol
148 g / 74.55 g/mol = 2 mol KCl
Hope this answers the question. have a nice day.
