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3 years ago

PLEASE HELP. WILL MARK BRAINLIEST SERIOUSLY CONFUSED HELLPPPP PLEASE

Chemistry

1 answer:

Yuri [45]3 years ago

6 0

Alright! Here are the answers:

1. C. Fluorine is more reactive than nitrogen because fluorine needs only one electron to fill its outermost shell.

2. Aluminum (Al)

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A mole of the element U (uranium) and a mole of CO2

ElenaW [278]

An equal number of particles. Hope this helps! :D

4 0

3 years ago

The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay?

Pie

T½=18.72days
therefore t¾=18.72+½ of 18.72
we have 18.72+9.36=28.08days

7 0

3 years ago

Naturally occurring Indium has two isotopes.

trasher [3.6K]

Answer:

Average Molar mass is 114.8u

Explanation:

» From the formula of average Relative Atomic Mass [ RAM ]

${ \rm{RAM = \sum \frac{(isotopic \: mass \times \%abundance)}{100} }} \\$

» We have two isotopes of Indium,

Indium-113, mass » 112.9u, % » 4.28%
Indium-115, mass » 114.9u, % » 95.72%

${ \tt{RAM = \frac{ \blue{(112.9 \times 4.28)} + { \green{(114.9 \times 95.72)}}}{100} }} \\ \\ { \tt{RAM = \frac{11481.44}{100} }} \\ \\ { \underline{ \underline{ \tt{ \: RAM = 114.8\: }}}}$

3 0

2 years ago

Why should we conserve energy and what are a few ways to do so?

PIT_PIT [208]

Answer:

we should conserve energy the reason are in the points

To less power plants

To promote health

To reduce dependence

To finite resources

To make a positive impact

3 0

2 years ago

Methane CH4 (g) reacts with oxygen gas to produce carbon dioxide and water. ____________________________________________________

nordsb [41]

Answer: The chemical equations are written below.

Explanation:

For a: Methane reacts with oxygen gas to produce carbon dioxide and water.

Combustion reaction is defined as the reaction in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water

The chemical equation for the combustion of methane follows:

$CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)$

For b: Butane reacts with oxygen gas to produce carbon dioxide and water.

This is also an example of combustion reaction.

The chemical equation for the combustion of butane follows:

$2C_4H_{10}(g)+13O_2(g)\rightarrow 8CO_2(g)+10H_2O(g)$

For c: An aqueous solution of sulfuric acid reacts with aqueous potassium hydroxide to produce potassium sulfate and water.

When an acid reacts with a base, it leads to the formation of salt and water. This reaction is known as neutralization reaction

The chemical equation for the reaction of potassium hydroxide and sulfuric acid follows:

$H_2SO_4+2KOH\rightarrow K_2SO_4+2H_2O$

Hence, the chemical equations are written above.

4 0

4 years ago