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liubo4ka [24]
2 years ago
6

(b) Which of the following is a mixture?

Chemistry
1 answer:
bija089 [108]2 years ago
4 0

Answer:

a

Explanation:

Mixture is a combination of two or more elements and sodium is an element with a chemical symbol Na and a charge of +1 and chloride too is an element with a chemical symbol Cl and a charge of -1 so when these two elements are combine it form a chemical solution called Sodium chloride

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rewona [7]

Answer:  D. Made of only one kind of atom

Explanation:A compound forms whenever two or more atoms form chemical bonds with each other.

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A sample in made of copper and zinc. It has a high melting point, can conduct electricity in a solid and liquid state, and is ma
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The answer is C. Only metallic alloys are malleable and ductile. The other descriptions can apply to all 3 answers
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2 years ago
For the chemical reaction CaI2+2AgNO3-> 2AgI+Ca(NO3)2 how many moles of silver iodide will be produced from 205g of calcium i
Colt1911 [192]

Answer:

Moles of silver iodide produced = 1.4 mol

Explanation:

Given data:

Mass of calcium iodide = 205 g

Moles of silver iodide produced = ?

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CaI₂ + 2AgNO₃     →      2AgI + Ca(NO₃)₂

Number of moles calcium iodide:

Number of moles = mass/ molar mass

Number of moles = 205 g/ 293.887 g/mol

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Now we will compare the moles of calcium iodide with silver iodide.

                     CaI₂         :           AgI

                         1           :             2

                       0.7         :           2×0.7 = 1.4

Thus 1.4 moles of silver iodide will be formed from 205 g of calcium iodide.

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What is the electron configuration for helium (He)?
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The electron configuration for helium is 1s2
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