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Sergio [31]
3 years ago
7

Need Help with these 2. Will give Brainliest!!

Chemistry
1 answer:
Klio2033 [76]3 years ago
8 0

Answer:

1. b

2. a

Explanation:

1. The density of an object represents the mass per unit volume of the object. A density of 0.45 g/mL means that 1 mL of the object weighs 0.45 g, 1.000 g/mL means 1 mL weighs 1 g, etc.

<u>A density of 35,885 g/mL means that 1 mL of the object weighs 35,885 g. This is a ridiculously high amount of weight for an object with a volume of 1 mL and seems not reasonable. It is highly unlikely that such a substance exists in nature.</u>

2. <u>Considering the fact that only rock would sink in water of all the substances from a - d, it thus means that rock would have the greatest density.</u> Oil, oxygen, and ice will all float on water, meaning that they are less dense than water.

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Electron configuration of ag
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Silver/Electron configuration

[Kr] 4d¹⁰ 5s¹

Atomic number: 47

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2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g)
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Answer:- 10 L of ethane.

Solution:- The given balanced equation is:

2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)

From this equation, ethane and oxygen react in 2:7 mol ratio, the ratio of volumes would also be same if they are at same temperature and pressure.

Since 14 L of each gas are taken, the oxygen will be the limiting reactant and ethane will be the excess reactant. Let's calculate the volume of ethane used:

14LO_2(\frac{2LC_2H_6}{7LO_2})

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From above calculations, 4 L of ethane are used. So, excess volume of ethane left after the completion of reaction = 14 L - 4 L = 10 L

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When an atom gains or loses electrons and has and does not have an equal number of
aksik [14]

Answer:

it is called an ion

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if it gains electrons then it is an anion

if it gains protons it is a cation

typically non metals are anions and metals are cations

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