百分数及浓度的公式(Formulaforpercentageandconcentration) Formulaofconcentration Theweightofthesolute+theweightofthesolvent=theweight ofthesolution Theweight,theweightofthesolutesolutionx100%= concentration Weightofsolution=concentration=soluteweight Theweight,concentrationofsolutesolution=weight Infact,themostcommonly...
percent Cu by weight, 30.42 percent Fe, and 34.94 percent S. Dividing these numbers by the atomic weights of Cu (63.55), Fe (55.85), and S (32.06), we obtain 0.545, 0.545, and 1.090, respectively. These numbers have the ratio 1:1:2, from which we obtain the formula for copper ...
Using the formula for percentile, Percentile = (Number of Values Below “x” / Total Number of Values) × 100 Percentile for weight 58 kg = (4/10) × 100 = 0.4 × 100 = 40% Therefore, the percentile for weight 58 kg = 40% ...
The following is a general formula for the mastic weight percent total
They continue to gain weight after their first 10 days and follow a healthy growth curve during their first year. (Most babies lose up to 7 to 10 percent of their birth weight in the first few days and then regain it by the time they're about 2 weeks old.) Happy baby. They seem ...
Direct distillation can yield at best the constant-boiling-point mixture containing 95.6 percent by weight of ethanol. Dehydration of the constant-boiling-point mixture yields anhydrous, or absolute, alcohol. Ethanol intended for industrial use is usually denatured (rendered unfit to drink), typically...
Many parents are concerned if their child is less than the 50th percentile for height or weight, but half of us are less than the 50th percentile. If your child is in the 25th percentile for weight, this means he’s heavier than 25 percent of boys his age, and less heavy than 75 per...
The BMI formula uses your weight (in kg or pounds) and your height (in meters or inches) to form a simple calculation that provides a measure of your body fat. The formula for BMI was devised in the 1830s by Belgian mathematician Adolphe Quetelet and is universally expressed in kg/m2....
By calculating a percent error in the test weight, the technician can gauge whether or not the scale is sufficiently accurate for its intended use. The observed weight was {eq}V_o = 24.9 \ g{/eq}, compared to a theoretical weight of {eq}V_t = 25.00 \ g{/eq}.Lesson...
The formula for the percent by mass is given by {eq}\displaystyle \text{% by mass} = \frac{\text{ mass of element}}{\text{ mass of compound}} \times...Become a member and unlock all Study Answers Start today. Try it now Create an a...