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Anton [14]
3 years ago
7

Which statement accurately compares the trends in atomic number and atomic mass in the periodic table?

Chemistry
2 answers:
TiliK225 [7]3 years ago
8 0

Answer:

C. Both the atomic mass and the atomic number increase from left to right.

Explanation:

Dmitriy789 [7]3 years ago
7 0

The answer is , C. Both the atomic mass and the atomic number increase from left to right .

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For a particular isomer of C8H18, The following reaction produces 5093.7 KJ of heat per mole of C8H18(g) consumed under standere
Aleks04 [339]
02(g) = 0 kj/mol 
<span>CO2 (g) = -393.5 kj/mol </span>
<span>H20(g) = -241.8 kj/mol </span>

<span>H total = -5094 kJ
</span>5094kJ = [8(-393.5) + 9(-241.8)] - [X + 12.5(0)] 
<span>-5094 kJ = [-3148 + (-2176.2)] - [x + 0] </span>
<span>-5094 kJ = -5324.2 - x </span>

<span>add -5324.2 to -5094 </span>
<span>to get +230.2 = -x </span>

<span>move the negative to the other side </span>
<span>and you get -230 kj/mol</span>
7 0
3 years ago
Which of the following would be classified as an acid to the Arrhenius definition
mixer [17]

Any substance that increases the concentration of H^+ in aqueous solutions is Arrhenius's acid.

<h3>What are Arrhenius acids?</h3>

Arrhenius define acids as substances with the chemical capacities to increase the concentration of hydrogen ion in aqueous solutions.

Thus, substances like HCl, HNO3, HBr, etc. would be considered an acid. This is because they ionize in aqueous solutions as follows:

HCl ---> H^+ + Cl^-

HNO_3 --- > H^+ + NO_3^-

HBr --- > H^+ + Br^-

More on Arrhenius acids can be found here: brainly.com/question/9936252

#SPJ1

4 0
2 years ago
Read 2 more answers
Why does an atom of 23NA have 23 electrons
Julli [10]
It is actually something standardized more so than theoretical,  however in terms of atoms in general the electrons are based on the amount of  electronic shells that an atom has and the amount of electrons that atom can accommodate.  In the case of sodium, it has three shells with 2 electrons on the first shell which is the maximum, 8 on the second shell which is also the max and 1 on their final shell
So simply put an ATOM of Sodium (Na) has 23 electrons because it has 23 protons which is a fact
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7 0
3 years ago
Paper towel absorbs water is a physical or chemical change?
Marina CMI [18]
It depends. many of the websites i see answering the questions are all over the place, but good luck.
8 0
3 years ago
3.0 L of oxygen gas is heated from 100k to 250k. What is the new volume after the temperature has been increased???
alexandr402 [8]

Answer:

7.5 L

Explanation:

Using Charles' law, which is V1/T1=V2/T2, we can plug in these numbers to find the answer.  The law states that volume is directly proportional to temperature. 3.0L/100K = x L / 250 K. Solve for x to get 7.5 L. Hope this helps.

7 0
2 years ago
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