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iris [78.8K]
3 years ago
7

Which of these elements is the most chemically reactive?

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
3 0

Answer:

a zinc is the most reactive

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Round the number 6845 into three significant figures
DIA [1.3K]
6840 is the answer hope this help
5 0
3 years ago
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Concentration of 10.00 mL of HBr if it takes 5 mL of a 0.253 M LiOH solution to<br> neutralize it?
Sonbull [250]
In a titration, for an acid to neutralize a base, at the equivalence point, there should be an equal number of moles of H+ and OH-.

Moles of OH- can be found by multiplying the concentration of the base by the volume. (You will need to keep in mind the stoichimetric coefficients if the strong base is Ca(OH)₂, Ba(OH)₂, or Sr(OH)₂.

Moles of OH- = moles of H+
(0.253 M) * 0.005 L = 0.01000 L * c
c = 0.1265 M

The concentration of HBr is 0.127 M.
3 0
3 years ago
How many moles of CaO are needed to react with excess water to produce 370g of calcium hydroxide?
never [62]

Answer:

5 moles

Explanation:

CaO+H20--> Ca(OH)2

mass 280 90 370g

RFM 56 18 74

moles 5 5 5

4 0
3 years ago
Acrostic: Dihydrogen Monoxide
goldenfox [79]
D - Dangerous substance
I - It's colorless and odorless
H - Harmful to people and property
Y - You can't taste it
D - Disrupts cell membranes
R - Reactive Hydroxyl Radical
G - Gene and DNA mutations
E - Explosive compounds
N - Neurotransmitters can be critically altered

M - Most people don't know what it its
O - Only people who look into it will find out
N - Nothing can survive without it
O - Otherwise safe
X - X marks the spot, you can find it on many maps
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5 0
3 years ago
Please help.
Anna35 [415]

Answer:

9429.9

Explanation:

periodt

4 0
3 years ago
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