- How many moles of atoms are contained in 0.685g of Mg?

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A gas has a volume of 645 mL at 67.9 °C. What is the final temperature in °C if the volume changes to 459 mL? Write the system of equations represented by the augmented matrix. Utilize the variables x, y, and z in that order.? The common ratio for the following geometric sequence 1/3 3/15 9/75 27/375? A polynomial has remainder 3 when divided by (x-2) and a remainder of -5 when divided by (x+2) what is the remainder when divided by (x^2-4)? What is the volume and L of a 9.21 g sample of oxygen gas at 40.7°C that exerts 886.7 mmHg of pressure? ?