Which sentence in a 5-paragraph essay states the essay's main idea?

A. Lead-in

B. Thesis

C. Topic

D. Transition

helium gas in a 2.00 L cylinder is under 1.12 atm pressure. At 36.5°C that same gas sample has a pressure of 2.56 atm. What was the initial temperature of the gas in the cylinder?

Control rods are used to prevent uncontrolled chain reactions from happening inside nuclear power plants. Based on what you know about nuclear reactions, which is the most important characteristic a control rod should have?

How many moles of calcium chrloride are needed to react completely with moles of silver nitrate?

Gold cylinder has a mass of 75 g and a specific heat of 0.129J/G degrees Celsius it is heated to 65°C and then put in 500 g of water who's temperature is 90°C what is the final temperature of the gold water system

What did early scientists assume that the polar caps had in common?

According to the octet rule most elements need_valence electrons.

What is the average speed of particle in a gas at room temperature? Why is temperature an important variable?

An electron is in a region outside the nucleus. An electron a) Is larger than a proton and has no charge b) Has less mass than a proton and has a negative charge c) Is smaller than a proton and has no charge d) Has a positive charge

Under conditions of "feasting", the body favors oxidation/utilization of which source for energy production

2.17 in to 10^23 molecules of Br 2 to moles