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3 years ago

15

SIMPLE RECALL: Identify the term what is bieng describe. Write your answer on the blank before the number

1 answer:

kondor19780726 [428]3 years ago

8 0

Jump jump jump jump jump jump jump
Jump jump jump jump jump jump jump jump jump jump jump

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How do pencil models of atoms differ from real atoms?

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the pencil models are much bigger

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4 years ago

Match the time frame listed on the left with the characteristic listed on the

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mesozoic era - age of the dinosaurs

end of the paleozoic era - most of earth a desert

end of the mesozoic era - a layer of iridium deposited all over earth

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3 years ago

How many grams of sodium chloride, NaCl, result from the reaction shown in the following equation, FeCl3 + 3NaOH

LUCKY_DIMON [66]

<span>175.5g
</span>Cl(35.5) x 3 = 106.5
Na(23) x 3 = 69
106.5 + 69 = 175.5g

or

0g because sodium and chlorine are not chemically bonded.

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4 years ago

Read 2 more answers

Name the type of bond between atoms in ammonia molecule. Give a reason for your answer

Likurg_2 [28]

Answer:

Covalent bonds are formed when electrons are shared between elements that are nonmetals. The ammonium ion, NH+4 , would have covalent bonds because both nitrogen and hydrogen are nonmetals. ... The rest of the bonds all contain electrons from both hydrogen and nitrogen, so they would be considered ordinary covalent bonds.

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3 years ago

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A soft silvery metal has two naturally occurring isotopes: mass 84.9118, accounting for 72.15% and mass 86.9092, accounting for

zloy xaker [14]

Answer: The atomic weight of the metal would be 85.47.

Explanation:

Mass of isotope 1 of metal = 84.9118

% abundance of isotope 1 of metal = 72.15% = $\frac{72.15}{100}$

Mass of isotope 2 of metal= 86.9092

% abundance of isotope 2 of metal = 27.85% = $\frac{27.85}{100}$

Formula used for average atomic mass of an element :

$\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})$

$A=\sum[(84.9118)\times \frac{72.15}{100})+(86.9092)\times \frac{27.85}{100}]]$

$A=85.47$

Therefore, the atomic weight of the metal would be 85.47.

6 0

3 years ago