A observation! Hope this helps you!
Answer:
Mass percent of food dyes = 0.0616%
Explanation:
Given data:
Mass of candy = 47.9 g
Calories = 240
Mass of fat = 10 g
Mass of carbohydrate = 34 g
Mass of protein = 2 g
Mass of food dyes = 29.5 mg
Mass percent of food dyes = ?
Solution:
First of all we will convert the mg into g.
Mass of food dyes = 29.5 mg × 1g /1000 mg = 0.0295 g
Mass percent of food dyes = mass of food dyes / total mass× 100
Now we will put the values.
Mass percent of food dyes = 0.0295 g / 47.9 g × 100
Mass percent of food dyes = 0.000616 × 100
Mass percent of food dyes = 0.0616%
Answer: A. CaO
Took the test already.
Answer:
0.0018 moles
Explanation:
Given data:
mass of aspirin= 0.325 g
molar mass of aspirin= 180.1589 g/mol
number of moles=?
Formula:
number of moles= mass in gram/ molar mass (g/mol)
Solution:
now we will put the values in given formula:
number of moles of aspirin= mass of aspirin/ molar mass of aspirin
number of moles= 0.325 g/ 180.1589 g/mol
number of moles = 0.0018 mol
Mole:
Mole is the unit of amount in chemistry. it is SI unit and represented by "mol".
Example;
one mole of hydrogen has a mass of 1.008 g and contain 6.022× 10∧23 atoms.
The nucleus!! This is made up of protons and neutrons that each weigh about 1 amu.
Electrons are not found in the nucleus and weigh almost nothing so chemistry in school doesn’t bother with them :)
