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Alborosie
3 years ago
7

Which is a polar molecule?

Chemistry
1 answer:
Sloan [31]3 years ago
5 0
A polar molecule is when the arrangement of the atoms in molecules are unequal where one end of the molecule has a positive charge while the other end has a negative charge. Examples of a polar molecule are water, ammonia, hydrogen sulfide and sulfur dioxide. The opposite is called a nonpolar molecule. 
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Given the reaction: cu(s) + 4hno3(aq) → cu(no3)2(aq) + 2no3(g) + 2h2o(l )as the reaction occurs, what happens to copper?
katrin [286]
From the reaction between Cu and HNO₃, the formed gas is NO₂ instead of NO₃. Hence the correct balanced equation would be,
Cu(s) + 4HNO₃(aq) → Cu(NO₃)₂(aq) + 2NO₂(g) + 2H₂O<span>(l)

Here, Cu goes to </span>Cu(NO₃)₂ by changing its oxidation number from 0 to +2 while NO₃⁻ goes to NO₂ by reducing its oxidation state from +5 to +4 . Hence Cu is oxidized by HNO₃ in the reaction.
6 0
3 years ago
A Geographic Information System is a system of which of these? A. Globes and maps B. Satellites C. Satellite signals and receive
AleksAgata [21]

Answer:

its D

Explanation:

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7 0
3 years ago
Fat,minerals,vitamins,water which is odd one​
jolli1 [7]
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7 0
3 years ago
Assuming that the concentration of sodium hypochlorite is 4.0% (w/v), calculate the molarity of the sodium hypochlorite solution
levacccp [35]
We are told that the concentration of sodium hypochlorite is 4.0% (w/v). To calculate the molarity of the sodium hypochlorite solution, let us consider a sample volume of 0.1 liter. Since we are given a w/v (Percent of weight of solution in the total volume of solution) value, it means that there are 4 <span>grams of sodium hypochlorite per 100 mL of solution (0.1 liter). Molarity is measured in moles per liter. So we'll just convert the given 4 grams to moles using the molar mass.
</span><span>
4 grams</span>sodium hypochlorite * (1 mol sodium hypochlorite/ 74.44 g sodium hypochlorite) = 0.054 moles sodium hypochlorite

So we have 0.054 moles sodium hypochlorite  / 0.1 L solution
<span>
Thus the molarity is 0.53 mol/L or just 0.53 M.


</span>
5 0
3 years ago
8. Which of the following is a correct description of what happens when you place a liquid in freezer
yawa3891 [41]

Answer:

c. Energy from the liquid is exhausted into the atmosphere outside the freezer  

Explanation:

Energy from the liquid is exhausted into the atmosphere outside the freezer.

a. is wrong. If the energy remained inside the freezer, the warm liquid would cool down and the inside of the freezer would warm up.

b. is wrong. The freezer removes energy from the liquid.

5 0
3 years ago
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