Answer:
16400g
Explanation:
The amount of Calcium nitrate {Ca(NO3)2} that will be needed can be calculated as follows:
Molarity (M) = number of moles (n) ÷ volume (L)
According to this question, molarity = 0.2M, volume = 500L
number of moles = molarity × volume
number of moles (n) = 0.2 × 500
n = 100moles
Using mole = mass/molar mass
Molar mass of Ca(NO3)2 = 40 + {14 + 16(3)}2
= 40 + (14 + 48)2
= 40 + 62(2)
= 40 + 124
= 164g/mol
Mass = mole × molar mass
mass = 100 × 164
mass = 16400g of Ca(NO3)2
Answer:
chloroplasts
Explanation:
It is found in cellular structures in certain plant cells. These are usually found in the leaves of plants. It is the chlorophyll in the leaves of plants that gives them their green color.
They usually mate in water and they lay eggs.
Potassium
Potassium is a mineral present in food that helps in a series of important body functions such as muscle contractions, nerve impulses, digestion and normal water balance. Consumption of the right balance of potassium-rich foods and beverages supplies the body the potassium it requires as it does not produce potassium by itself naturally. Consumption of too little or too much potassium can lead to serious health problems.
Answer:
the correct answer its 50 %