A highly volatile substance has an initial mass of 1200 g and its mass is reduced by 12% each second. a Write a formula that gives the mass of the substance (m) at time (t) seconds. b Rearrange this formula to make t the subject. C What mass remains after 10 seconds, correct to 2 decimal places? d Calculate how long (to the nearest second) it takes until the mass is 10 grams. e After how many seconds (to the nearest second) is the mass less than 1 gram?​

Find the vertex(use the completing the square method), findthe x- and y-intercepts, and sketch the graph offunction. y = 2x2 + 4x - 1

Asample of a gaseous substance changes into liquid. this process is called (blank) and it takes place when heat is (blank) a gaseous system

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c