Chemistry

• Significant Figures are numbers/digits that carry meaning contributing to its precision.
• All nonzero digits are considered significant.
• Zeros appearing anywhere between two non-zero digits are significant, leading zeros are not significant.
• Trailing zeros in a number containing a decimal point are significant.
• When adding or subtracting, the answer should have the same number of decimal places as the limiting term.
• The limiting term is the number with the least amount of significant figures.
• When multiplying or dividing, the answer should have the same number of significant terms as the limiting term.
• Objects will float if the density is less than water.
• Objects will sink if the density is more than water.
• Accuracy in measurements is how close it is to the actual measurement.
• Precision in measurements is how repeatable the results are.
• A rule for accuracy in measurements is to find the absolute measurement and then estimate one more digit.
• Density is the amount of mass in the given volume, also known as compactness (g/ml).
• Mass is the amount of matter (g)
• Volume is the amount of space (mL)
• Density can be calculated using the formula D=M/V
• Mass can be calculated using the formula M=DV
• Volume can be calculated using the formula V=M/D.