Answer:
1.71 × 10²¹ molecules
Explanation:
1 gram is equal to 1000 milligrams. The mass in grams corresponding to 500 mg is:
500 mg × (1 g / 1000 mg) = 0.500 g
The molar mass of ascorbic acid is 176.12 g/mol. The moles corresponding to 0.500 grams of ascorbic acid are:
0.500 g × (1 mol/ 176.12 g) = 0.00284 mol
In 1 mole of ascorbic acid, there are 6.02 × 10²³ molecules of ascorbic acid (Avogadro's number). The molecules in 0.00284 moles are:
0.00284 mol × (6.02 × 10²³ molecules/ 1 mol) = 1.71 × 10²¹ molecule
No, pure cocoa powder is not very soluble. A hot cocoa mix will dissolve well under warm temperatures.
Disinfectants are chemicals in liquid form which destroy micro organisms. They are usually applied to the surfaces of non-living objects in order to kill microbes that are located on those surfaces. Disinfectants are usually used in the hospitals, kitchens, bathrooms, etc to kill infectious microbes. There are different types of disinfectants and the choice of the type to use depends on the kind of microbes involved. Disinfectants are used when there is a possibility that a surface has been infected with infectious agents.