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stich3 [128]
3 years ago
7

Select the correct answer.

Chemistry
1 answer:
Lera25 [3.4K]3 years ago
3 0

Answer:

1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}

Explanation:

S is in 3d period, so it has 3 levels

1 level has 2 electrons, 2d level 8 electrons, 3d level 6 electrons

1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}

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Wich scientist is credited with developing the first scientific atomic theory
Fantom [35]

Answer:

john dalton

Explanation:

8 0
2 years ago
Balanced chemical equation: BaCl2(aq)+Na2SO4(aq)⟶BaSO4(s)+2NaCl(aq)
Ipatiy [6.2K]

Answer:

Part 1)  85.3 grams NaCl

Part 2)  8.79 x 10²³ formula units NaCl

Explanation:

<u>(Part 1)</u>

To find the mass of NaCl, you need to multiply the given value (1.46 moles) by the molar mass of NaCl. This measurement is the atomic masses of the elements times each of their quantities combined. In this case, there is only one mole of each element in the molecule. Moles should be located in the denominator of the conversion to allow for the cancellation of units. The final answer should have 3 sig figs to reflect the given value.

Molar Mass (NaCl): 22.99 g/mol + 35.45 g/mol
Molar Mass (NaCl): 58.44 g/mol

1.46 moles NaCl            58.44 g
---------------------------  x  ----------------  =  85.3 grams NaCl
                                        1 mole

<u>(Part 2)</u>

I do not know which other question the second part is referring to, so I will just use the moles given in the first part. To find the formula units, you need to multiply the given value (1.46 moles NaCl) by Avogadro's Number. This conversion represents the number of formula units found in 1 mole of the sample. The moles should be in the denominator of the conversion to allow for the cancellation of units.

Avogadro's Number:

1 mole = 6.022 x 10²³ formula units

1.46 moles NaCl         6.022 x 10²³ units
------------------------  x  -----------------------------  =  8.79 x 10²³ formula units NaCl
                                          1 mole

4 0
1 year ago
if theres no coefficient on a element symbol, is the power automatically 1 like it would be if there was no subscript?
Ivenika [448]
Yup go this website for more information http://dwb.unl.edu/calculators/activities/BalEqn.html
5 0
3 years ago
Which word completes the blank in the following statement?
Dvinal [7]
The answer should be an electrical circut
i think thats how you spell it

8 0
2 years ago
What has to happen in order for dew to form on grass?
jeka57 [31]
It has to be moist in the grass
4 0
2 years ago
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