The number of moles in a substance indicates the amount of the substance that contains the same number of particles as 12 g of the Carbon-12 isotope [or equivalent to 6.02 × 10²³ (which is used as a standard in the world of moles).
Now,
if 6.02 × 10²³ atoms are found in 1 mole of Mg
then let 6.98 × 10²⁴ atoms are found in x
⇒ x = (6.98 × 10²⁴) ÷ (6.02 × 10²³)
= 11.595 mol
Also,
Mass = Mole × Molar Mass
∴ Mass of Mg = 11.595 mol × 24 g / mol
= 278.27 g
<span>
The mass of a sample of 6.98 × 10</span>²⁴ atoms of magnesium (Mg) would contains 278.27 g
Answer:
FeS
Explanation:
The reason why their is no subscripts is because as put in the question, the charges are equivalent. As you can see, +2 and -2 equal each other out.
Note: S has a charge of -2, not +2. (Look at oxidation rules.)
Complete Question
The complete question is shown on the first uploaded image
Answer:
a
The correct option is reagent B
b
The skeletal structure of major organic product A is shown on the third uploaded image
Explanation:
The mechanism of the reaction for A and B are shown on the second the second reaction and looking at this we can see that the reagent that predominately gives 1,2 addition is reagent B
56<span>Co + 0-1e → <span>56 </span>27Fe [everything else in this answer will be random since I need at least 20 characters to answer] eyeyeyeyeyeyeyeyeyeyeyeyeyeyeyeyeyey</span>
Answer:
1. Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages). ...
2. Convert the mass of each element to moles. ...
3. Find the ratio of the moles of each element. ..
4. Use the mole ratio to write the empirical fomula
