Polar covalent bonds are between atoms with different electronegativities, whereas nonpolar covalent bonds are between atoms with the same electronegativity.
This means that HCl is a polar covalent bond, whereas H2 is a nonpolar covalent bond.
Answer:
Explanation:
(a) Unbalanced equation
(b) Balanced equation
(c) Molar masses
The only compound for which you need an atomic mass is water.
You look up the atomic masses of each element in the Periodic Table, multiply by their subscripts in the formula, and add.
(d) Molar Ratio
You want to convert moles of carbon dioxide to moles of water.
The balanced equation tells you that the molar ratio is 1 mol H₂O:1 mol CO₂.
(e) Significant figures
The only measurement you are given is "about 650 L." That tells you that the trailing zero is not significant.
The volume has only two significant figures, so the mass of water can have only two significant figures.
Note: Intermediate calculations should carry at least one extra digit (a guard digit) to prevent cumulative round-off errors, answers to be reported must have the correct number of significant figures.
(f) The calculation
You don't give the temperature and pressure of the gas, so I shall assume STP (1 bar and 0 °C). At STP, the molar volume of a gas
is 22.71 L.
27) mechanical weathering
28) overgrowth of algae that produce toxins
29) Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering:mechanical and chemical. Mechanical weathering is the disintegration of rock into smaller and smaller fragments.
30) I'M NOT SURE
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Most nonmetallic solids have the property of brittleness.