Answer:
The molecular formula of this compound is
Explanation:
From the given,
Mass of compound = 7.36 g
Molar mass of compound = 34.0 g/mol
The mass of oxygen = 6.93 g
The hydrocarbon contains only hydrogen and carbon.
Mass of hydrogen + Mass of oxygen = 7.36 g
Mass of hydrogen + 6.93 g = 7.36 g
Mass of hydrogen = 7.36 - 6.93 = 0.43g
Molar mass of hydrogen = 1.0 g/mol
Molar mass of oxygen = 16 g/mol
Now divided each one by 0.43
Oxygen:
Hydrogen :
Animal fibers are fibers from animals and consist mainly of protein. They contain not only silk fiber from silkworms and fur fiber from sheep wool but also collagen fiber extracted from animal skins, chitin from crustaceans, and shellfish like shrimp and chitosan made by deacetylating chitin.
A bond between 2 nonmetal atoms that have the same electronegativity and therefore have equal sharing of the bonding electron pairExample: In H-H each H atom has an electronegativity value of 2.1, therefore the covalent bond between them is considered nonpolar. Nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.
False. A mixture represents elements or molecules which are not chemically combined.
Answer:
280 g Al₂O₃
Explanation:
To find the mass, you need to multiply the given value by the molar mass. This will cause the conversion because the molar mass exists as a ratio; technically, the ratio states that there are 101.96 grams per every 1 mole Al₂O₃. It is important to arrange the ratio in a way that allows for the cancellation of units. In this case, the desired unit (grams) should be in the numerator. The final answer should have 2 sig figs to reflect the given value (2.7 mol).
Molar Mass (Al₂O₃): 101.96 g/mol
2.7 moles Al₂O₃ 101.96 g
------------------------ x ------------------- = 275 g Al₂O₃ = 280 g Al₂O₃
1 mole