Answer:
0.653
Explanation:
1)
M1V1 = M2V2
M1 = 5.04 M
V1 = 229 mL ( you take only this volume)
V2 = 921 mL
5.04*229 = M2 * 921
M2 = (5.04*229)/921 Molarity
2)
M1V1 = M2V2
M1 = (5.04*229)/921
V1 = 100 mL
V2= 192 mL
(5.04*229)/921 *100 = M2 * 192
M2 = [(5.04*229)/921 *100]/192 = 0.653 final molarity
Answer:
1...option B
2... peroids
3..group
4.. metals
5...7
6...dmitri mendeleev
7.. xenon
8... compound can be broken down by physical means
9... they can be broken down into simpler substance
sry if its wrong
last two 8th and 9th i do t think ots correct
(Question 1 atoms) (question 2 cells)
ANSWER IS D.
EXPLANATION:
The electronic configuration of neutral Rubidium atom is 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,5s1.
when a monoatomic ion is to be formed the Rubidium atom loses one electron from 5s orbital so the electronic configuration for the ion is 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6.
Answer:
Amount of Na = 2.17moles
Explanation:
Mass of Na = 50g
Molar mass of Na = 23g/mol
Amount of mole = mass/molar mass
Amount of mole = 50/23
Amount of mole = 2.17moles
