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GREYUIT [131]
2 years ago
15

PLEASE HELP ME ASAP THIS IS DUE IN 10 MINUTES AND I AM STUCK!!

Chemistry
2 answers:
Art [367]2 years ago
8 0

Answer:

c

Explanation:

MissTica2 years ago
7 0
Is it due already ? In my opinion I see it as D
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A solution of saline may contain 1.81 mol of sodium chloride (NaCl). How many sodium atoms are present in the solution?
joja [24]

Answer:

1.09 x 10²⁴ atoms Na

Explanation:

In one mole of NaCl, there is also one mole of Na. To convert between moles and atoms, you need to use Avogadro's number. When writing the conversion, the desired unit (atoms) should be placed in the numerator to allow for the cancellation of units (moles). The final answer should have 3 sig figs to match the given number (1.81 mole).

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

1.81 moles Na           6.022 x 10²³ atoms
---------------------  x  --------------------------------  =  1.09 x 10²⁴ atoms Na
                                       1 mole

5 0
1 year ago
Write a balanced half-cell equation for the reaction occurring at the anode. ignore phases in the reaction.
r-ruslan [8.4K]

The balanced half-cell equation for the reaction occurring at the anode is  H2 ---> 2H(+) + 2e(-)

E<u>xplanation:</u>

  • The balanced half-cell equation taking place at the anode is explained below
  • The product produced in the reaction in the fuel cell is water.
  • H2 ---> 2H(+) + 2e(-)
  • In the above reaction, the oxidation state of hydrogen switches from 0 to +1.
  • It is becoming oxidized by delivering two electrons at the anode.
  • In the fuel cell, hydrogen molecules get oxidized to hydronium ions.Thus half-reaction is the oxidation reaction.

<u />

7 0
3 years ago
The energy stored in foods and fuels is?
elixir [45]
Chemical potential energy
5 0
3 years ago
This is the picture answer this plsss..
Ulleksa [173]

Answer:

he is a weelder because of him taking a peice of metal and recreateing it.

Explanation:

3 0
3 years ago
A gas exerts a pressure of 0.62 atm. Convert this to kPa and mmHg. Be sure to show your work.
IRINA_888 [86]

Answer:

The answer to your question is 0.62 atm = 62.82 kPa = 471.2 mmHg

Explanation:

Data

P = 0.62 atm

P = ? kPa

P = ? mmHg

Process

1.- Look for the conversion factor of atm to kPa and mmHg

 1 atm = 101.325 kPa

1 atm = 760 mmHg

2.- Do the conversions

                  1 atm ----------------- 101.325 kPa

                  0.62 atm ------------  x

                   x = (0,62 x 101.325) / 1

                  x = 62.82 kPa

                   1 atm ------------------ 760 mmHg

                   0.62 atm ------------  x

                   x = (0.62 x 760)/1

                   x = 471.2 mmHg                

4 0
3 years ago
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