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lina2011 [118]
3 years ago
7

*30 points* Pls answer following the rules of :No files

Chemistry
1 answer:
gladu [14]3 years ago
4 0
<h3>1.Option B</h3><h3>Elements can be defined as pure substances that are made up of only single type of atom. </h3>

<h2>Note:</h2>

  • Single type of atom not single atom

<h3>2.Option B </h3><h3>Aluminum foil is correct because heterogenous mixtures are uniform throughout the mixture. and foil is uniform but other option given are not uniform.</h3>
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Calculate the number of moles in 2.60 grams of SnO2 ? Please show your work to receive credit.
Firdavs [7]

Answer:

There are 0.017252 moles in SnO2

Explanation:

n= m/M

n=2.6/(118.710 + 2(16))

n= 2.6/150.71

n= 0.017252

Remeber to round based on the significant digits in the question.

8 0
3 years ago
Combining 0.381 mol of Fe2O3 with excess carbon produced 17.4 g of Fe.
blondinia [14]
Combining 0.381 mol of fe203 with excess carbon produced 17.4g of fe.
3 0
3 years ago
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600
Crazy boy [7]
The beginning of the Pre Cambrian is known as the Hadean eon. The planet was just born, and it was very very hot, and in fact molten. There were a lot of volcanic activities, and because of the way the solar system was created, there were still a lot of collisions between different bodies
3 0
4 years ago
1. Choose the alkyl halide(s) from the following list of C6H13Br isomers that meet each criterion below. 1) 1-bromohexane 2) 3-b
Vika [28.1K]

Answer:

See explanation

Explanation:

the compound that gives the fastest SN2 reaction with sodium methoxide- 1-bromohexane

the compound that gives the fastest SN1 reaction- 3-bromo-3-methylpentane

the compound(s) that undergo an SN1 reaction to give rearranged products- 1-bromo-2,2-dimethylbutane

the compound that is least reactive to sodium methoxide in methanol -

3-bromo-3-methylpentane

the compound(s) that can exist as diastereomers - 3-bromo-3-methylpentane

the compound(s) that can exist as enantiomers- 3-bromo-2-methylpentane

6 0
3 years ago
The analogy that forms the basis of the octet rule compares covalent valence
o-na [289]

Answer:

b

Explanation:

orbital overlap electron densities.

3 0
3 years ago
Read 2 more answers
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