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Charra [1.4K]
2 years ago
7

Q 9 The table lists the steps to clean water for drinking purpose. 1. Adding chlorine tablets to the water.2. Pouring the water

through the candle filter 3. freezing the water 4. Reusing the water in multiple household activities Which set of steps would help to provide water fit for drinking?
(a) 1 and 2
(b) 2 and 3
(c) 3 and 4
(d) 4 and 1
Chemistry
1 answer:
love history [14]2 years ago
8 0

Answer:

1 and 2

Explanation:

when we r adding chlorine to water

the water is clean

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Use the table to answer the question
My name is Ann [436]

Answer:

B

Explanation:

hope the picture helps you to understand:)

4 0
2 years ago
Read 2 more answers
Joan’s initial nickel (II) chloride sample was green and weighed 4.3872 g. After the dehydration reaction and removal of excess
ANEK [815]

Answer:

a) yes, it was an hydrate

b) the number of waters of hydration, x = 6

Explanation:

a) yes it was an hydrate because the mass decreased after the process of dehydration which means removal of water thus some water molecules were present in the sample.

b) NiCl2. xH2O

mass if dehydrated NiCl2 = 2.3921 grams

mass of water in the hydrated sample = mass of hydrated - mass of dehydrated = 4.3872 - 2.3921 = 1.9951 g which represent the mass of water that was present in the hydrated sample.

NiCl2.xH2O

mole of dehydrated NiCl2 = m/Mm = 2.3921/129.5994 = 0.01846 mole

mole of water = m/Mm = 1.9951/18.02 = 0.11072 mole

Divide both by the smallest number of mole (which is for NiCl2) to find the coefficient of each

for NiCl2 = 0.01846/0.01846 = 1

for H2O = 0.11072/0.01846 = 5.9976 = 6

thus the hydrated sample was NiCl2. 6H2O

4 0
3 years ago
WILL GIVE BRAINLIEST
Alex777 [14]

For the first one, you have to find one that has both a metal and a nonmetal in it, plus potassium. Bonds between nonmetals are called covalent because they share electrons and a bond between a metal and a nonmetal is an ionic bond because they exchange electrons.

Potassium chloride is KCl. Only an ionic bond.

Potassium hydride is KH. Only an ionic bond.

Potassium nitrate is KNO3. There we go, that has a covalent bond between the nitrogen and oxygen, and an ionic bond between potassium and the nitrogen and oxygen.

For the second one, potassium chloride is the answer because the other three also have covalent bonds. Chloride is the only one that isn't a compound.

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2 years ago
How many elements in this compound: HClO<br> 1<br> 2<br> 3<br> 4
spayn [35]
There are three elements hydrogen, chlorine, and oxygen
3 0
3 years ago
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In order to become ________, ions will combine with other ions to form new substances.
horrorfan [7]
The answer is "More Stable."
7 0
2 years ago
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