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Bogdan [553]
3 years ago
5

Origin of hard water​

Chemistry
2 answers:
lisabon 2012 [21]3 years ago
7 0

Answer:

ice

Explanation:

prisoha [69]3 years ago
5 0

Answer:

Hard water is formed when water percolates through deposits of limestone, chalk or gypsum which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.

Explanation:

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CaCl₂ → Ca²⁺ + 2Cl⁻

∑=1+2=3

D) 3 mol
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4 years ago
Which element is used to paint the skin to pervent infection from cuts and scratches
gizmo_the_mogwai [7]
Iodine is the element 


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4 years ago
Which of the following correctly describes a mixture? (4 points) Group of answer choices The particles are chemically bonded tog
Zanzabum

Answer:

The particles have no set ratio for how to combine, and they can be separated by physical means.

Explanation:

5 0
3 years ago
I’ve been up all night doin chemistry, can someone please give me the answers
m_a_m_a [10]
Here are your answers:

1. MgBr2 + Cl2 = MgCl2 + Br2

Balancing,
Already balanced.

Type of reaction: single displacement


2. Al + Fe2O3 = Al2O3 + Fe

Balancing,
2Al + Fe2O3 = Al2O3 + 2Fe

Type: single displacement reaction


3. AgNO3 + ZnCl2 = AgCl + N2O6Zn

Balancing,
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Type: double displacement reaction

MnO2
4. H2O2 ====== O2 + H20 [being catalyzed by manganese dioxide]

Balancing,
MnO2
2H2O2 ====== O2 + 2H2O

Type: decomposition reaction


5. Zn + HCl = ZnCl2 + H2

Balancing,
Zn + 2HCl = ZnCl2 + H2

Type: single displacement reaction


6. H2SO4 + NaOH = Na2SO4 + H2O

Balancing,
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Type: Acid-base reaction




That took hella long!!! Hope it helps.
4 0
3 years ago
Which is the formula for nitrogen trihydride? NH3 N3H 3NH N3H3<br><br>NH3<br>N3H<br>3NH<br>N3H3
kirza4 [7]

Answer:

NH3

Explanation:

The "tri" attached to the trihydride means 3. So your hydrogen is going to have 3 atoms.

8 0
3 years ago
Read 2 more answers
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