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S_A_V [24]
3 years ago
5

Why do you think different liquids have different freezing points

Chemistry
1 answer:
Ganezh [65]3 years ago
5 0
I think that different liquids have different freezing points because every liquid consists of different atoms and different things that make up the atom causing them to have different freezing points.
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An atom is electrically neutral because
serg [7]

Answer:

c

Explanation:

neutrons have no charge

protons and electrons have opposite charges and balance each other out in equal numbers

7 0
3 years ago
A 10.0-milliliter sample of NaOH(aq) is neutralized by 40.0 milliliters of 0.50 M HCl. What is the molarity of the NaOH(aq)?
Ludmilka [50]
\frac{10 mL}{1000 mL}  = 0.01 L

\frac{40mL}{1000mL} =0.04L

M _{1} V_{1}=M_{2}V_{2}

M_{1}(0.01)=(0.50)(0.04)

M_{1}(0.01)=0.02

M_{1}= \frac{0.02}{0.01}

M_{1}=2
3 0
4 years ago
Calculate the percent by mass of a solution of Ca(NO3)2 that has 22.63 g dissolved in 896.92 g of water.
never [62]

Hey there!

To calculate the percent by mass of the Ca(NO₃)₂ we need to find the total mass first by adding.

896.92 + 22.63 = 919.55

In total, the solution is 919.55 grams.

To find the percent of Ca(NO₃)₂ in the solution, divide the mass of Ca(NO₃)₂ by the total mass and multiply by 100.

22.63 ÷ 919.55 = 0.0246

0.0246 x 100 = 2.46

Ca(NO₃)₂ makes up 2.46% of the solution.

Hope this helps!

6 0
4 years ago
What is the coefficient of h2 when you balance the equation for this redox reaction? no2(g) + h2(g) → nh3(g) + h2o(l)?
laiz [17]
To balance any redox equation, first divide the reaction into two half reactions, and balance the atom whose oxidation number is changing: 

<span>NO2 --> NH3 </span>
<span>H2 --> H2O </span>

<span>Next, balance oxygens by adding H2O where needed, and then balance hydrogen by adding H+: </span>

<span>NO2 --> NH3 + 2 H2O </span>
<span>H2O + H2 --> H2O </span>


<span>7 H+ + NO2 --> NH3 + 2 H2O </span>
<span>H2O + H2 --> H2O + 2 H+ </span>

<span>Next, balance charges by adding electrons (e-): </span>

<span>7 H+ + NO2 + 7 e- --> NH3 + 2 H2O </span>
<span>H2O + H2 --> H2O + 2 H+ + 2 e- </span>

<span>Now, multiply one or both equations by small numbers to make the number of electrons the same in the two half reactions. In this case, multiply the top equation by 2 and the bottom one by 7 to give you 14 electrons in each half reaction: </span>

<span>14 H+ + 2 NO2 + 14 e- --> 2 NH3 + 4 H2O </span>
<span>7 H2O + 7 H2 --> 7 H2O + 14 H+ + 14 e- </span>

<span>Finally, add the two half reactions and simplify by cancelling anything that is on both sides. This will give you the final balanced reaction: </span>

<span>2 NO2 + 7 H2 --> 2 NH3 + 4 H2O </span>

<span>So, the answer to the original question is (A) 7
</span>
5 0
4 years ago
A mass of 50g of calcium carbonate is heated, releasing carbon dioxide and calcium oxide.
Inessa05 [86]

Answer:C

Explanation:

4 0
3 years ago
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