All categories

2 years ago

Which has the greatest percentage of oxygen? CO2, NO2,SO2 and MgO?

Chemistry

1 answer:

Dahasolnce [82]2 years ago

6 0

Answer:

CO₂

Explanation:

Please see attached picture for full solution.

* The masses of each atom can be found in the periodic table of elements

You might be interested in

Report the answer with the correct number of significant figures: a. 12.3 mm x 15.853 mm = b. 72.98 · 15.830 ml = c. 12.3 mm + 1

Fynjy0 [20]

Explanation:

The rule apply for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The rule apply for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

a) 12.3 mm × 15.853 mm :

$12.3 mm\times 15.853 mm :194.9919 mm^2\approx 195 mm^2$

Three significant figures.

b) 72.98 · 15.830 ml

$72.98\times 15.830 ml=1,155.2734 ml\approx 1,155 mL$

Three significant figures.

c) 12.3 mm + 15.853 mm

$12.3 mm + 15.853 mm = 28.153 mm\approx 28.1 mm$

Three significant figures.

d) 172.3 cm - 15.853 cm

$172.3 cm - 15.853 cm= 156.447 cm\approx 156.4 cm$

Four significant figures.

4 0

2 years ago

The concentration of two reactants is decreased by the same amount. How

IrinaVladis [17]

I think answer should be d. Please give me brainlest I hope this helps let me know if it’s correct or not okay thanks

5 0

2 years ago

(Pls explain I don't really understand the question)

lara [203]

Answer:

When silver nitrate (AgNO3) and potassium chloride (KCl) combine in their liquid state, they form two products by double displacement method.

Silver Chloride (AgCl) and Potassium Nitrate (KNO3)

The reaction is AgNO3 + KCl --- AgCl + KNO3

The precipitate formed is AgCl

Explanation:

6 0

2 years ago

Which of the following pairs of chemical reactions are inverses of each other? Answer options: a. Hydrogenation and alkylation b

mariarad [96]

Answer:

d. Oxidation and reduction

Explanation:

For this question we have to remember the definition of each type of reaction:

-) Hydrogenation

In this reaction, we have the addition of hydrogen to a molecule. Usually, an alkene or alkyne. In the example, molecular hydrogen is added to a double bond to produce an alkane.

-) Alkylation

In this reaction, we have the addition of a chain of carbon to another molecule. In the example, an ethyl group is added to a benzene ring.

-) Hydrolysis

In this reaction, we have the breaking of a bond by the action of water. In the example, a water molecule can break the C-O bond in the ester molecule.

-) Halogenation

In this reaction, we have the addition of a halogen (atoms on the VIIIA group). In the example, "Cl" is added to the butene.

-) Ammoniation

In this reaction, we have the addition of the ammonium ion ( $NH_4^+$ ). In the example, the ammonium ion is added to an acid.

-) Oxidation and reduction

In this reaction, we have opposite reactions. The oxidation is the loss of electrons and the reduction is the gain of electrons. For example:

$Ag^+~+~e^-~->~Ag$ Reduction

$Al~->~Al^+^3~+~3e^-$ Oxidation

3 0

2 years ago

How many electrons should we expect to see associated with the lowest energy peak in the photoelectron spectrum of the element b

Sonbull [250]

Ans: 7 electrons

The peaks in a photoelectron spectrum correspond to the binding energy of electrons in a given substance. The lower energy peaks represent the binding energy of the outer or valence electrons whereas the higher energy peaks correspond to that of the inner and core electrons.

The atomic number of bromine is 35. The electron configuration would be:

Br[35] =[ 1s²2s²2p⁶3s²3p⁶3d¹⁰]4s²4p⁵

The valence electron configuration is:

Br[35] = 4s²4p⁵

there are 7 valence electrons, thus the lowest energy peak would be associated with 7 electrons.

5 0

2 years ago

Read 2 more answers

Which has the greatest percentage of oxygen? CO2, NO2,SO2 and MgO?​

Which has the greatest percentage of oxygen? CO2, NO2,SO2 and MgO?