Wherever calculations are involved, show answers with appropriate number of significant figures. Include units wherever necessary. Show your work in the spaces below questions; just the final answers, even when correct, will not earn much credit. 1. At 27°C and 720 Torr, a certain gas sample has a volume of 765 ml. a. What would be its new volume if the temperature and pressure were changed to 57°C and 792 Torr? Hint: Use Combined Gas Law. b. How many moles are present in that gas sample? Hint: Use Universal Gas Law.

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A: Mole is defined as exactly 6.022 ×10²³ particles, which may be atoms, molecules, ions, or electrons.

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Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.