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madreJ [45]
3 years ago
13

Predict the chemical formula of the compound that will form when Li and o interact.

Chemistry
1 answer:
Ksivusya [100]3 years ago
4 0

Answer:

Li_2O

Explanation:

Hello!

In this case, when looking over the chemical formula of a compound formed when two elements interact, we need to realize about their location in the periodic table; thus, since lithium is a metal and oxygen a nonmetal, we infer lithium turns out the cation and oxygen the anion. Moreover, as the oxidation state of lithium is 1+ and that of oxygen is 2-, we can set up the chemical formula as follows:

Li^+O^{2-}\\\\Li_2O

Best regards!

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A substance has a solubility of 350 ppm.how many grams of the substance are present in 1.0l of a saturated solution
sergeinik [125]
Since the given solubility is 350 ppm, convert it first with fraction of solubility. by dividing the solubility with 10^6
S = 350 / 10^6
s = 3.5 x 10^-4
the multiply it to the total solution to calculate the amount of substance present
m = ( 3.5 x 10^-4 ) ( 1.01 )
m = 3.535 x 10^-4 g of the substance present
6 0
3 years ago
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10. Air is a homogenous mixture of gases. Oxygen is 20% by volume of air typically. What
raketka [301]

Answer:

893 moles

Explanation:

An ideal gas at STP occupies 22.4 liters. Calculating Oxygen as if it were an ideal gas there are . 893 moles of Oxygen in 20.0 liters.

3 0
3 years ago
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Allisa [31]

Answer:

Blank 1 - Microscope

Blank 2 - Cell Theory

Explanation:

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3 years ago
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Butene, used as the monomer for polybutene, is composed of 85.7% and 14.3% by mass. If the density of butene is 2.50 g/L at STP,
Ann [662]

Answer:

C₄H₈

Explanation:

In the first, you should know the ideal gas law. One of the formula for this concept is:

MW = (δ*R*T) / P where:

MW is molecular weight, δ is density 2,50 g/L, R is the gas constant (0,082 (atm*L) / (mol*K) ), T is temperature (273,15 K at STP) and P is pressure (1 atm).

So:

MW = [2,50 g/L * 0,082 (atm*L) / (mol*K) * 273,15 K ] / 1 atm

MW = 56 g/mol

Then the problem says than butene is composed by 85,7% (of carbon) and 14,3 % (of hydrogen). So:

Carbon mass: 56 g/mol * 85,7% = 48 g/mol / 12 g/mol ( atomic mass of carbon = 4 carbon atoms.

And, hydrogen mass: 56 g/mol * 14,3% = 8 g/mol / 1 g/mol ( atomic mass of hydrogen = 8 hydrogen atoms.

Thus, the molecular mass of butene is: C₄H₈

I hope it helps!

7 0
3 years ago
Squirrels eat acorns for energy and to grow and repair tissues. How is an acorn used to build squirrel muscle?
PSYCHO15rus [73]

Answer:

The elements in the acorn are rearranged to make the molecules the squirrel's body needs. The proteins found in acorns are the same as squirrel muscle proteins, so they attach to muscle cells.

Explanation:

hpoe this helps

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3 years ago
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