Write an equation of a line that passes through the point (4,3) and is perpendicular to the graph of the equation y=−13x+4

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

2.5 milligrams is equivalent to how many grams

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?