Electrolysis uses electrical current to break water molecules into oxygen gas and hydrogen gas. How do you know that this is a chemical change?

If acid is splashed on your lab partner, immediately do which of the following? A. Wipe them off with a paper towel. B. Wrap them in the fire blanket. C. Flush the area with lots of water. D. Spray them with the fire extinguisher.

A catabolic process is a process in which molecules are broken down and energy is released. molecules are broken down and energy is absorbed. molecules are combined and energy is released. molecules are combined and energy is absorbed.

20 g of water. specific heat of water is 4.18 J/x°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings? 418 Joules 4.18 J 209 J 83 J

What dangers does background radiation pose to humans?

What is the density of 53.4 wt aqueous naoh?

Members of which group easily lose an electron to form a 1 cation? A. halogens B. alkaline earth metals C. noble gases D. alkali metals

If 420 joules of heat energy is added to 25 grams of water at 25 degrees celcius, what will be the final temperature of the water, in Celcius degrees?

What is the term for the smallest bit into which a chemical substance can be divided and still have the properties of that substance? A) electron B) atom C) molecules D) iron

What is the percent yield if 0.3 mol ba (no3) 2 and 0.25 mol na3po4 react to produce 0.095 mol ba3 (po4) 2?

A compound is a pure substance. It can not easily be broken down into parts by physical means. A) True B) False