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Nastasia [14]
3 years ago
9

No link or Files plz i need help with this one i been stuck on it for a long time

Chemistry
2 answers:
mina [271]3 years ago
5 0

Answer:

The particles in a solid are tightly packed and locked in place. Although we cannot see it or feel it, the particles are moving or vibrating in place. 

kupik [55]3 years ago
4 0

Answer:

molecules in a solid are tightly packed together and vibrate about their fixed positions.

Explanation:

there is very little movement between molecules in a solid since there is not much space between the molecules, hence the slight vibrations.

i hope this helps! :D

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The carbon cycle is closely linked to which of the following processes?
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Answer:

Photosynthesis

Explanation:

As the plants are converting the CO2 into O2... So the photosynthesis reduce the amount of CO2...

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3 years ago
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A science teacher has a supply of 20% saline solution and a supply of 50% saline solution. How much of each solution should the
lilavasa [31]

Answer:

<h2>B)</h2>

Explanation:

\text{Let}\\\\x-\text{a volume of}\ 20\%\ \text{saline solution}\\\\y-\text{a volume of }\ 50\%\ \text{saline solution}\\\\p\%=\dfrac{p}{100}\\\\20\%=\dfrac{20}{100}=\dfrac{2}{10}=0.2\\\\50\%=\dfrac{50}{100}=\dfrac{5}{10}=0.5\\\\0.2x-\text{a volume of salt in }\ 20\%\ \text{saline solution}\\0.5y-\text{a volume of salt in }\ 50\%\ \text{saline solution}\\\\60mL-\text{a volume of}\ 28\%\ \text{saline solution}\\\\28\%=\dfrac{28}{100}=0.28

0.28\cdot60mL=16.8mL-\text{a volume of salt in }\ 28\%\ \text{saline solution}\\\\\text{Equations}\\\\(1)\qquad x+y=60\\(2)\qquad0.2x+0.5y=16.8

\left\{\begin{array}{ccc}x+y=60\\0.2x+0.5y=168&\text{multiply both sides by 10}\end{array}\right\\\left\{\begin{array}{ccc}x+y=60&\text{multiply both sides by (-2)}\\2x+5y=168}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-2x-2y=-120\\2x+5y=168}\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad3y=48\qquad\text{divide both sides by 3}\\.\qquad y=16

\text{Put the value of}\ y\ \text{to the first equation:}\\\\x+16=60\qquad\text{subtract 16 from both sides}\\x=44

6 0
4 years ago
Nac2h3o2 is not a component of the hc2h3o2 equilibrium. explain hc2h3o2 equilibrium
Hatshy [7]

HC₂H₃O₂ , equilibrium can be represented as:

HC₂H₃O₂ + H₂O--------->CH₃COO⁻ + H₃O⁺

HC₂H₃O₂, that is acetic acid dissociate in water that is H₂O and formed acetate anion that is CH₃COO⁻ and hydronium ions that is H₃O⁺.

Its equiibrium constant can be represented as:

Ka=\frac{[CH_{3}COO^{-1}]\times [H_{3}O^{+1}]}{CH_{3}COOH}

While NaC₂H₃O₂ can be dissociate as:

NaC₂H₃O₂------>CH₃COO⁻ + Na⁺

Sodium acetate that is NaC₂H₃O₂, dissociates as forming acetate anion and sodium cation.


6 0
4 years ago
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23. How much heat do you need to raise the temperature of 100g of aluminum from 15oC to 45oC? q=mC∆T
ad-work [718]
The amount of heat required to raise the temp of aluminum from 15°C to 45°C is 645 calories

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Nucleotides consist offa phosphate group, a nitrogenous base, and a
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Answer:

5-Carbon sugar

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4 0
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