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Blababa [14]
1 year ago
8

30.The type of chemical reaction represented by the following equation is....HBr + NaOH ---> H2O + NaBrSelect one:a. decompos

ition. b. double displacement.c. single displacement.d. synthesis.
Chemistry
1 answer:
Sladkaya [172]1 year ago
5 0

Answer:

b. Double displacement.

Explanation:

It is a double displacement reaction, because in this case, hydrogen atom in HBr is replaced by a sodium atom (from NaOH), and the sodium atom (in NaOH) is replaced by another H atom from HBr molecule, to form H2O.

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Identify the reaction type of the chemical reaction below. Check all that apply.
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3 years ago
Dolomite is a carbonate of magnesium and calcium. Analysis shows that 7.81 g of dolomite contains 1.70 grams of Ca. Fluorite is
andrew11 [14]

Answer:

The richer source of calcium is fluorite.

Explanation:

Percentage of element in compound :

=\frac{\text{mass of element}}{\text{Mass of compound}}\times 100

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Given mass of dolomite = 7.81 g

Mass of calcium present in given mass of dolomite = 1.70 g

Percentage of calcium in Dolomite:

=\frac{1.70 g}{7.81 g}\times 100=21.77\%

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