zinc and copper is a solution of brass
D. I think but I’m not 100% on that
83.235 grams of CaCl2 is required to make 1 litre of 0.75M solution.
Explanation:
Molarity or molar concentration is the number of moles of solute that can be dissolved in 1 L of a solution.
let us find the number of moles
n=C*V Concentration is 0.75M
Volume is 1000ml.
n= 0.75*1
n= 0.75
This means there are 0.75 moles of CaCl2 in 1000 ml of solution of .75M.
Molar mass of CaCl2 is = 40.08+ 2(35.5)
= 110.98 gms
Thus 1 MOLE OF CaCl2 weighs 110.98
so 0.75 moles will weigh 110.98*0.75
= 83.235 grams of CaCl2 is required to make 1 litre of 0.75M solution.
Answer:
Answered below.
Explanation:
Pesticides are an effective means for the control of mosquitoes and therefore the prevention of malaria. They are present in the form of sprays, liquids and powders. These pesticides are being used around the house, sprayed in the grasses and bushes and in stagnant water to prevent the breeding of mosquitoes.
The halt on the production of pesticides as a result of environmental concerns has resulted in the prevalence and increased cases of malaria in South America and Africa. This in turn gives rise to the increased demand of available medications ; Artemisinin and quinine being the popular ones available. As a resultof this high demand, supply is limited and prices soar.
This is a concern because this leads to the inability of the people of these regions to get treatment because majority of them are poor and cannot afford these expensive medications. Therefore cases of malaria and malaria-related mortality increase especially in pregnant women and under fives.
