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Fantom [35]
2 years ago
6

g Oxidation refers to ________ Select one: a. an increase in oxidation number. b. a decrease in oxidation number. c. an increase

in mass. d. an increase in the atomic number. e. a gain in the number of protons.
Chemistry
1 answer:
mihalych1998 [28]2 years ago
4 0

Answer:

The correct alternative is "Option a".

Explanation:

Oxidation has become a mechanism whereby the physicochemical properties transform attributed to the formation of O₂.

  • The connection involving magnesium as well as O₂ requires the oxidation of the component named magnesium.
  • Even before exposed to the air, silicon is oxidized as well as generates silicon dioxide.

Other possibilities are not connected to the scenario in question. So Choice A is the best option.

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You add 4.7 gg iron to 27.10 mL of water and observe that the volume of iron and water together is 27.70 mLmL . Calculate the de
sattari [20]

Answer : The density of iron is, 7.8 g/mL

Explanation : Given,

Mass of iron = 4.7 g

Volume of water = 27.10 mL

Volume of water and iron = 27.70 mL

First we have to calculate the volume of iron.

Volume of iron = Volume of water and iron - Volume of water

Volume of iron = 27.70 mL - 27.10 mL

Volume of iron = 0.6 mL

Now we have to calculate the density of iron.

\text{Density of iron}=\frac{\text{Mass of iron}}{\text{Volume of iron}}

Now put all the given values in this expression, we get:

\text{Density of iron}=\frac{4.7g}{0.6mL}

\text{Density of iron}=7.8g/mL

Thus, the density of iron is, 7.8 g/mL

5 0
3 years ago
which statement is true about the reaction shown by this chemical equation HCl + NaOH ------> NaCl + H2O
NNADVOKAT [17]

Answer:

A. It is exothermic

Explanation:

3 0
3 years ago
Read 2 more answers
The noble gases are an example of a ______ of elements. period family table
Mariulka [41]
Periodic table of elements
5 0
3 years ago
Which of the following is the correct set-up for the problem: How many grams of water will be produced from 3.2 moles of oxygen
suter [353]

Option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

<h3>Reaction between oxygen and ethene</h3>

Ethene (C2H4) burns in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O) along with the evolution of heat and light.

C₂H₄  + 3O₂   ----- > 2CO₂ + 2H₂O

from the equation above;

3 moles of O₂ ---------> 2(18 g) of water

3.5 moles of O₂ ----------> x

x = 3.2 \times [\frac{2 \ moles \ H_2O}{3 \ moles \ O_2}  ] \times[ \frac{18.02 \ g \ H_2O}{1 \ mole \ H_2O} ]

Thus, option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

Learn more about reaction of ethene here: brainly.com/question/4282233

#SPJ1

6 0
1 year ago
Element J is 1s 2s 2p 3s . (i) How many unpaired electrons does J have?
Mama L [17]

Answer:6

Explanation:

3+3

7 0
3 years ago
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