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grin007 [14]
3 years ago
9

How many moles are in 123.0 grams of KClO4? (3 points)

Chemistry
1 answer:
iVinArrow [24]3 years ago
5 0

Answer:

0.8878 mol KClO4

Explanation:

Molar mass of KClO4 = 39.0983 + 35.453 + ( 15.9994 x 4 ) = 39.0983 + 35.453 + 63.9976 = 138.5489g/mol

but,

number of moles = mass in grams / molar mass where mass in grams = 123g, molar mass = 138.5489g/mol

number of moles = 123g / 138.5489g/mol = 0.8878mol

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Fed [463]

Answer:

Creo que la respuesta es n. Transalation : I think the answer is N.

Explanation:

4 0
2 years ago
In which of the following states is nitrogen found at room temperature?
mamaluj [8]
At room temperature two atoms of nitrogen combine to form a colorless and odorless diatomic gas. it is found in gaseous state.

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4 0
3 years ago
Please help, due soon!
algol13

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Explanation:

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5 0
3 years ago
What is Darwin's name for species that do not appear to have changed for millions of years?
ioda

Since, the options have not been given the question is incomplete.

What is Darwin's name for species that do not appear to have changed for millions of years?

a.

Dinosaurs

b.

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c.

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d.

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Answer: b. Living fossil

Explanation:

In 1859 Charles Darwin proposed the term living fossil, that means a species or group of species that had not changed in terms of evolutionary context thus can be useful in tracing the extinct or previously existing forms of life. The examples of the living fossils are horseshoe crabs, ginkgo (Conifers) and tuatara. These group of animals were existed unchanged in the Ordovician, Permian, and Triassic periods respectively with few surviving species.

4 0
3 years ago
What is the mass of 99.0 L of NO2 at STP?
vekshin1

Mass of NO₂= 203.32 g

<h3>Further explanation</h3>

Given

99.0 L of NO₂

Required

Mass of NO₂

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

So mol NO₂ :

= 99 : 22.4

= 4.42

Mass :

= mol x MW

= 4.42 x 46 g/mol

= 203.32 g

7 0
3 years ago
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