Answer:
D. Protons & Neutrons
Explanation:
Protons and Neutrons are found in the nucleus of the atom, and the electrons orbit the shells.
Dna is deoxyribonucleic acid. it carries genetic instructions used in growth and development in living organisms.
Answer:
#1. single replacement 2 1 2 1
#2. synthesis 1 3 1
#3. combustion 1 5 3 4
Answer:
Pascal is the most common unit for measuring pressure
The average sea level pressure is 1013 mbar
Molality= mol/ Kg
if we assume that we have 1 kg of water, we have 3.19 moles of solute.
the formula for mole fraction --> mole fraction= mol of solule/ mol of solution
1) if we have 1 kg of water which is same as 1000 grams of water.
2) we need to convert grams to moles using the molar mass of water
molar mass of H₂O= (2 x 1.01) + 16.0 = 18.02 g/mol
1000 g (1 mol/ 18.02 grams)= 55.5 mol
3) mole of solution= 55.5 moles + 3.19 moles= 58.7 moles of solution
4) mole fraction= 3.19 / 58.7= 0.0543
