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4 years ago

Which element is present in all organic compounds?

Chemistry

2 answers:

AnnZ [28]4 years ago

7 0

here have Carbon & Hydrogen in all the organic compounds.

Hatshy [7]4 years ago

4 0

Carbon and Hydrogen are present in all organic compounds !

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Can the process of rusting be called combustion?

gregori [183]

Answer:

no the answer is oxidation

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3 years ago

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Why do atoms tend to be bonded to other atoms?

Aleks04 [339]

Answer:

Atoms are often more stable when bonded to other atoms

Explanation:

Like for example let's say ionic bonds..... Since one atom has to lose specific electrons to be stable and the other needs the electrons from the other atom to be stable.....

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3 years ago

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HELPPP. What is the molarity (molar concentration) of a 500.0mL that contains 5.60g of KOH? Please show your work, with units, a

-Dominant- [34]

Answer:

.2 M

Explanation:

grams/molar mass=ans./volume(L)=molarity

5.6/56=ans./.500=.2 M

- Hope that helps! Please let me know if you need further explanation.

7 0

4 years ago

PLEASE HELP

Aleksandr-060686 [28]

Answer: The mass of lead (II) nitrate required is 74.52 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of lead (II) chloride = 62.6 g

Molar mass of lead (II) chloride = 278.1 g/mol

Plugging values in equation 1:

$\text{Moles of lead (II) chloride}=\frac{62.6g}{278.1g/mol}=0.225 mol$

The chemical equation for the reaction of lead (II) chloride and sodium nitrate follows:

$Pb(NO_3)_2+2NaCl\rightarrow PbCl_2+2NaNO_3$

By the stoichiometry of the reaction:

1 mole of lead (II) chloride is produced from 1 mole of lead (II) nitrate

Then, 0.225 moles of lead (II) chloride will react with = $\frac{1}{1}\times 0.225=0.225mol$ of lead(II) nitrate

Molar mass of lead (II) nitrate = 331.2 g/mol

Plugging values in equation 1:

$\text{Mass of lead (II) nitrate}=(0.225mol\times 331.2g/mol)=74.52g$

Hence, the mass of lead (II) nitrate required is 74.52 g

8 0

3 years ago

At 125 °C, 1 mol O₂ and 2 mol H₂ in a chamber have a total pressure of 3 atm. A current is run through the chamber, combining al

labwork [276]

Answer:

1.9998 atm

Explanation:

Balance the equation and then use PV=nRT to find the variable.

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3 years ago