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3 years ago

Two substances that have the same number of moles of representative particles always have:

Chemistry

1 answer:

shusha [124]3 years ago

3 0

Two substances that have the same number of moles of representative particles always have:
none of these are correct

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What is the density of an object with a mass of 53.7 g and a volume of 27.19 ml?

11111nata11111 [884]

The density is 158.2

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3 years ago

What is the required molarity of a ba(oh)₂ solution to prepare a 1.0 m oh⁻ solution?

timurjin [86]

The molarity of a Ba(OH)2 solution required to prepare a1.0 OH- solution is calculated as follows

write the equation for dissociation of Ba(Oh)2

that is,

Ba(Oh)2 -----> Ba^2+ + 2Oh-

by use of reacting ratio between Ba(Oh)2 to Oh which is 1:2 the molarity of Ba(oh)2 = 1.0/2 = 0.5 M

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3 years ago

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Q3. Which of the following objects are chiral and which are achiral? a

Sergio039 [100]

Answer:

See explanation

Explanation:

In this question, we have to follow the IUPAC rules. Lets analyze each compound:

a. 1-methylbutane

In this compound we have a chain of 5 carbons, so the correct name is Pentane.

b. 1,1,3-trimethylhexane

In this compound, we longest chain is made of 7 carbons, so, we have to use the name "heptane". Carbon one would be the closet one to the methyl group, so the correct name is 2,4-dimethylheptane.

c. 5-octyne

In this case, carbon 1 would be the closet one to the triplet bond. With this in mind, the correct name is oct-3-yne.

d. 2-ethyl-1-propanol

In this compound, we longest chain is made of 4 carbons, so, we have to use the name "butane". Carbon one would be the carbon with the "OH" group, so the correct name is 2-methylbutan-1-ol.

e. 2.2-dimethyl-3-butanol

In this case, carbon 1 would be the closet one to the "OH". With this in mind, the correct name is 3,3-dimethylbutan-2-ol.

See figure 1

I hope it helps!

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4 years ago

1. Which is not true of binary compounds?

nignag [31]

Pretty sure it's b but not an definitely

4 0

3 years ago

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What is the second most abundant element in stars? A. helium B. iron C. hydrogen D. oxygen

devlian [24]

The abundance of a chemical element is a measure of the occurrence of the element relative to all other elements in a given environment. Abundance is measured in one of three ways: by the mass-fraction (the same as weight fraction); by the mole-fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases); or by the volume-fraction. Volume-fraction is a common abundance measure in mixed gases such as planetary atmospheres, and is similar in value to molecular mole-fraction for gas mixtures at relatively low densities and pressures, and ideal gas mixtures. Most abundance values in this article are given as mass-fractions.

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3 years ago