Hey There!:
The density is the quotient between the mass of a material and the volume occupied by it, The density can be expressed for a substance or for a mixture of substances. For example, water density in ambient conditions is equal to 1.00 g/cm3, which means that in 1 cm³ or 1 mL, there are 1.0 g of water. Therefore:
D = m / V
D = 20 g / 5 mL
D = 4,0 g/mL
hope that helps!
Answer:
<h3>The answer is 0.23 moles</h3>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>0.23 moles</h3>
Hope this helps you
Answer:as you add the base it added some PH. The Ph lever of white winegaer is2.4 - 3.4
Explanation:
Molality= moles of solute /kg of solvent
moles of solute= mass/molar mass
moles of solute= 3.94 g / (342 g/mol)
moles of solute= 0.01 mol
molality= 0.01 mol / 0.285 kg
molality= 0.04 m
Answer:
going down the periodic table atomic size increases,electronegativity and ionization decreases going down
