The difference between the solutions to the equation #x^2 = a# is 30. What is #a#? A student calculates the density of iron as 6.6 g/cm3 using lab data for mass and volume. A handbook …

What is the percent concentration of a 300-mm solution of CaCl2? How many pints of each 2 percent and 7 percent acid solutions must be mixed to obtain 50 pints of a 5 percent solution? …

Questions and Videos on Percent Composition, within Chemistry

See a solution process below: We can rewrite this question as: What is 6% of 800? "Percent" or "%" means "out of 100" or "per 100", Therefore 6% can be written as 6/100. When dealing with …

See the entire solution process below: "Percent" or "%" means "out of 100" or "per 100", Therefore x% can be written as x/100. We can find 4/14 as a percent by solving for x: 4/14 = …

42.1% The idea here is that all the sulfur that was present in the "0.157 g" sample of organic compound will now be present in the "0.4813 g" of barium sulfate. Your starting point here will …

This is a 25% discount. We can restate this problem as: $13 is what percent of $52? First, lets call the percent we are looking for "p" or p%. "Percent" or "%" means "out of 100" or "per 100", …

Feb 26, 2018 · See a solution process below: The formula for calculating the percent change in a value between two points in time is: p = (N - O)/O * 100 Where: p is the percent change - what …

Oct 16, 2016 · Now, the problem gives you percent abundance, but the above equation uses decimal abundances. To get from one to the other, simply divide a percent abundance by 100%.

See explanation. First we have to calculate the number of missed shots. To do this we have to subtract the number of hits from the total number of throws: m=25-18=7 Now we have to …