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IceJOKER [234]
4 years ago
10

If you have a solid like ice (solid water), which of the following substances below would most closely resemble the structure of

ice? indium cadmium quartz topaz
Chemistry
1 answer:
balandron [24]4 years ago
5 0
The correct option is QUARTZ. Quartz and ice belong to the hexagonal crystal group. They both have four axes, three of these axes are equal in length at an angle of 120 degree from one another and the last axis is either longer or shorter at a right angle to the other axes.
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The competition between the U.S. and the Soviet Union to get satellites and humans into space was known as the:
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Answer: It was known as the SPACE RACE.

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BRAINLIEST IF ANSWERED CORRECTLY WITH EXPLANATION! HELP PLEASE:)
elena-14-01-66 [18.8K]

First question

Pb(NO_3)_2 + KI \rightarrow PbI_2 + KNO_3

Balaneced:

Pb(NO_3)_2 + 2KI \rightarrow PbI_2 + 2KNO_3

Find how many moles potassium iodide it is in 345.0 grams

n_{KI} = \frac{345.0 \ g}{166.0 \ g/mol} = 2.078 \ mole

Find how many moles potassium nitrate there is for 2.078 moles KI

n_{KNO_3} = \frac{2}{2} \cdot n_{KI} = 2.078 \ mole

Find how many grams potassium nitrate there is in 2.078 moles KNO_3

m_{KNO_3} = 2.078 \ mol \cdot 101.1 \ g/mol = 210.1 \ g

Second question

yield \ \% = \frac{experimental}{theoretical} \cdot 100 = \frac{195.3 \ grams}{210.1 \ grams} \cdot 100 = 93.0 \ \%

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In a particular breed of cattle a black coat is dominant over a red coat if a cow with the red coat is crossed with the black ba
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When C3H8 burns completely inn excess of oxygen, the products formed are
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C3H8 + 5O2 ====> 3CO2 + 4H20

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