All categories

3 years ago

I NEED HELP PLEASE, THANKS! :) What's the mass of 4.23 moles of sodium chloride, NaCl?

2 answers:

6 0

The mole is an SI unit representing a specific quantity of atoms of an element or molecules of a compound. There are 6.02 x 1023 atoms in a mole of an element or 6.02 x 1023 molecules in a compound. 6.02 x 1023 is known as Avogadro's number.

can you give me brainlyest? i need two more to level up

BabaBlast [244]3 years ago

6 0

Answer:

247 grams NaCl

Explanation:

We want to convert 4.23 moles of NaCl into grams. To do so, we must first find the molar mass of NaCl.

According to the periodic table, it is 22.99 + 35.45 = 58.44 g/mol.

Now we must multiply the number of moles (4.23) by the molar mass to get the mass of NaCl:

4.23 mol * 58.44 g/mol ≈ 247 g

Thus, the answer is 247 grams of NaCl.

~ an aesthetics lover

You might be interested in

In the third period of the periodic table sodium is followed by magnesium aluminum silicon and phosphorus which of these element

wariber [46]

Answer:
Phosphorous has the smallest atomic size.

Explanation:
As we know these elements belong to same period means there valence shell is the same. So moving from left to right along the period the shell number remains constant but the number of protons and electrons increases. So, due to increase in number of protons the nuclear charge increases hence attracts the valence electrons more effectively resulting in the decrease of atomic size.

Elements and their atomic radius are as follow,

Magnesium 0.160 nm

Aluminium 0.130 nm

Silicon 0.118 nm

Phosphorus 0.110 nm

6 0

3 years ago

Explanation about the combining powers of element chemistry

stiv31 [10]

Answer:

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell. The noble gases have the valency 0 as they do not usually combine with other elements.

Explanation:

HOPE IT HELPS

5 0

3 years ago

Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released? (Hint: Use t

Salsk061 [2.6K]

The answer is: 167360

6 0

2 years ago

Read 2 more answers

A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-gpiece. How many kilograms of dietary fa

Genrish500 [490]

Answer: 0.14 kg

Explanation:

Gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece

That is 1 piece of candy weighs 22.7 g and contains 7.00 g of dietary fat

Converting the mass in pounds to kg

1 lb = 0.45 kg = 450 grams (1kg=1000g)

Number of pieces = $\frac{450}{22.7g}=20pieces$

1 piece contains = 7 g of dietary fat

Thus 30 pieces would contain = $\frac{7}{1}\times 20=140g$ of dietary fat

1 g = 0.001 kg

Thus 140 grams = $\frac{0.001}{1}\times 140=0.14kg$

Thus 0.14 kg of dietary fat are in a box containing 1.00 lb of candy.

5 0

3 years ago

When ethyl acetoacetate (ch3coch2co2ch2ch3) is treated with one equivalent of ch3mgbr, a gas is evolved from the reaction mixtur

pashok25 [27]

The protons of methylene group between the two carbonyl groups in ethylacetoacetate are acidic in nature. When compounds containing such acidic protons are treated with bases the loose proton and form enolates.

In this particular example when ethylacetoacetate is reacted with methyl magnesium bromide, the methyl group abstracts the acidic proton and converts into methane gas. The enolate when hydrolyzed is again converted into ethylacetoacetate as shown below,

6 0

3 years ago