Combustion in chemistry we can use a system of linear equations to determine the coefficients neces- sary to balance a chemical equation. for example, the complete combustion of propene (cshe) with oxygen (o2) results in carbon dioxide (co2) and water (h2o). because the quantity of each element is conserved, we must have the same quantities of carbon (c), oxygen (o) and hydrogen (h) on each side of the following chemical equation: a(c3hs) b(02) c(co2) + d(h20) where the coefficients a, b, c, d are how many of each molecule is present. (a) write the equation describing the conserved quantity of each type of chemical. you will have 3 equations in 4 unknowns. the equation for conserved oxygen atoms is given as an example: 2b = 2c + d ? 2b-2c-d = 0.

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Anull hypothesis states that the difference between 8 hours of sleep and 3 hours of sleep has no effect on the number of pictures a student will remember during a picture memory interface test (pmit). examining the mit database, an extremely small t-value of 0.1611 is found. this t-value is much smaller than the smallest t-value on the chart for p-value reference. from this information we can: select one: a. accept the null hypothesis because the p-value obtained shows that the difference between the two groups being tested is not statistically significant b. accept the null hypothesis because the p-value obtained was statistically significant c. reject the null hypothesis because of the p-value obtained d. reject the null hypothesis because the data obtained is statistically significant

The width of a piece of rectangular land is 5m shorter rhan 1/3 of its length .find the width of the land if the length is 60m,150m.