Calculation of the number of grams of salt and water of 10 grams of eye drops, if the weight of the salt in the solution is 0,25%

See Explanation

Explanation:

Let the mass of salt be x

Let the mass of solution be 10 g

Percentage by mass of salt = 0,25%

So;

Percent concentration of salt = mass of salt/mass of solution * 100

0.25 = x/10 * 100

0.25 * 10/100 = x

x= 0.025 g of salt

Let the mass of water be y

Since mass of solution = mass of salt + mass of water

10 g = 0.025 g + y

y = 10 g - 0.025 g

y = 9.975 g

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: