Name one physical and one chemical property of hydrogen?

The men's world record for running a mile outdoors (as of 1999) is 3 min 43.13 s. At this rate, how long would it take to run a 2 km race (1 mi = 1609 m) ?

Calculate the volume of the following at STP: Casetas de volume de almin 1. 2.00 moles of oxygen gas (0,)

The Lewis dot model of a metal atom has two dots. Which of the following is true about the atom? It is most likely to form covalent bonds. It has two electrons in the innermost energy level. It requires six other atoms to form a stable compound.

Heat is released when H2 gas and O2 gas react to form H2O. Why? A. Breaking the H-H bond in H2 gas releases heat. B. Breaking the O-O bond in O2 gas releases heat. C. Forming the H-O bonds in H2O releases heat. D.

Is H2 polar or non polar

What is the enthaply of the reaction?

Which color has a higher frequency, A. red light B. blue light

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

Which element is classified as an alkali metal? Rb Sr Zr Cl

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.