Answer:
Sample A
Explanation:
Molarity of a solution can be calculated using the formula:
Molarity = number of moles (mol) ÷ volume (vol)
For Sample A:
V = 300ml = 300/1000 = 0.3 L
Molarity = 1M
n = number of moles (mol)
1 = n/0.3
n = 0.3moles
For Sample B:
V = 145 mL = 145/1000 = 0.145L
Molarity = 1.5 M
n = number of moles
1.5 = n/0.145
n = 1.5 × 0.145
n = 0.22 moles
Based on the above results (moles), sample A with 0.3 moles contains the larger concentration of sodium chloride.
Answer:
controlled: 2 drops of food coloring
independent: temperature of water
dependent: rate of diffusion
Explanation:
A controlled variable doesn't change throughout the whole experiment, a independent variable is something being tested, and a dependent variable is the results
Answer:
Explanation:
525ml of 0.6550M MgCl₂ => 0.525L x 0.650M = 0.3413mole MgCl₂
0.3413mole MgCl₂ = 0.3413mole x 94 g/mole = 32.1g MgCl₂
The lost of element arranged in order of increasing Atomic radii is 4) F, CI, Br, I.
