A sample of oxygen gas is collected over water. The volume of gas collected is 0.250 L at 26°C and 765 torr total pressure. (Water vapor
pressure at 26°C = 25.22 torr)

How many grams of oxygen gas are collected?

If the oxygen gas collected is the product of decomposition of
potassium chlorate, how many grams of potassium chlorate is
decomposed (assuming 100% yield)?

0.317g, 0.810g

how do I set the problem up?

Step-by-step explanation:

A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest tenth. Using this equation, estimate the homework grade, to the nearest integer, for a student with a test grade of 31.

Homework Grade (x) Test Grade (y)

58 52

75 66

66 68

85 74

52 38

74 65

78 76