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kkurt [141]
2 years ago
10

Zinc carbonate and perchloric acid. complete and balance the following reactions

Chemistry
1 answer:
Ket [755]2 years ago
5 0

Answer:

ZnCO3 + 2HClO4 = Zn(ClO4)2 + CO2 + H2O

Explanation:

ZnCO3 + 2HClO4 = Zn(ClO4)2 + H2CO3

ZnCO3 + 2HClO4 = Zn(ClO4)2 + CO2 + H2O

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Butter melt when you heat it in a pan on the stove. Is this a chemical change or physical change? How can you tell?
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It would be an physical change ; if you melt butter the butter goes from a solid to a liquid so therefore the physical state is changed.
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Which statement accurately describes how magnetic stripes in ocean rock provide evidence of seafloor spreading?
Naily [24]

Answer:

The third one makes the most sense

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Draw the structure of 1,4-hexanediamine.
brilliants [131]

Answer:

1,4-hexanediamine contains two -NH_{2} functional groups.

Explanation:

1,4-hexanediamine is an organic molecule which contains two -NH_{2} functional groups at C-1 and C-4 position.

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5 0
3 years ago
You have 363 mL of a 1.25M potassium chloride solution, but you need to make a 0.50M potassium chloride solution. How many milli
maxonik [38]

Answer:- 544.5 mL of water need to be added.

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M_1V_1=M_2V_2

where, M_1 is initial molarity and  M_2 is the molarity after dilution. Similarly,  V_1 is the volume before dilution and  V_2 is the volume after dilution.

Let's plug in the values in the equation:

1.25M(363mL)=0.50M(V_2)

V_2=\frac{1.25M(363mL)}{0.50M}

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Volume of water added = 907.5mL - 363mL  = 544.5 mL

So, 544.5 mL of water are need to be added to the original solution for dilution.

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When you calculate the first two numbers in 493×10
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