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4 years ago

Which of the following would have the most difficult time holding onto heat?

Chemistry

2 answers:

egoroff_w [7]4 years ago

6 0

Answer:

carbon

Explanation:

cabonis not a conductor of heat

baherus [9]4 years ago

3 0

Carbon

carbonn is the correct answer

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What is the purpose of writing Shorthand Electron Configuration Using Noble Gases?<br> 30 POINTS!

aivan3 [116]

The noble gas configuration system helps to shorten the total electron configuration by using the symbol for the noble gas that lies before the particular element in the periodic table.

For example:

Na has atomic number 11

Electron configuration of Na: 1s2 2s2 2p6 3s1

Noble gas electron configuration of Na: [Ne] 3s1

Ne has atomic number 10 and lies before Na in the periodic table.

6 0

3 years ago

The pH of a solution is 8.83±0.048.83±0.04 . What is the concentration of H+H+ in the solution and its absolute uncertainty?

slava [35]

Answer:

The concentration of $H^{+}$ is 1.48 × $10^{-9}$ M

The absolute uncertainty of $[{H^{+}]$ is ±0.12 × $10^{-9}$ M

The concentration of $H^{+}$ is written as 1.48(±0.12) × $10^{-9}$ M

Explanation:

The pH of a solution is given by the formula below

pH = $-log_{10}[{H^{+}]$

∴ $[H^{+}] = 10^{-pH}$

where $[{H^{+}]$ is the $H^{+}$ concentration

From the question,

pH = 8.83±0.04

That is,

pH =8.83 and the uncertainty is ±0.04

First, we will determine $[{H^{+}]$ from

$[H^{+}] = 10^{-pH}$

$[{H^{+}] = 10^{-8.83}$

$[{H^{+}] = 1.4791$ × $10^{-9}$ M

$[{H^{+}] = 1.48$ × $10^{-9}$ M

The concentration of $H^{+}$ is 1.48 × $10^{-9}$ M

The uncertainty of $[{H^{+}]$ ( $U_{[H^{+}] }$ ) from the equation $[H^{+}] = 10^{-pH}$ is

$U_{[H^{+}] } = 2.303 \\$ × ${[H^{+}] }$ × $U_{pH }$

Where $U_{[H^{+}] }$ is the uncertainty of $[{H^{+}]$

$U_{pH }$ is the uncertainty of the pH

Hence,

$U_{[H^{+}] }$ = 2.303 × 1.4791 × $10^{-9}$ × 0.04

$U_{[H^{+}] }$ = 1.36 × $10^{-10}$ M

$U_{[H^{+}] }$ = 0.12 × $10^{-9}$ M

Hence, the absolute uncertainty of $[{H^{+}]$ is ±0.12 × $10^{-9}$ M

6 0

4 years ago

Which of the following is a product formed when K reacts with Cl2? (2 points)

kompoz [17]

KCl2 (potassium dichloride) ?I’m not completely sure

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4 years ago

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enyata [817]

Answer: Chemical Change

Explanation:

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3 years ago

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13. What is the molar mass of (NH4)3PO4? (Use whole number molar masses) *

Vinil7 [7]

13. C

14. 64 / 98 x 300 = 195.91 your answer is "B"

7 0

3 years ago