David found that water can be created in a lab by burning hydrogen gas in air. He concluded that water is not a compound because only hydrogen was used to form water. What is wrong with David's conclusion

What represent an acid-base neutralization reaction?

Where on the electromagnetic spectrum is visible light found?

What type of bond is formed between metal ions and nonmetal ions? a-metallic b-ionic c-covalent

Coefficients should always: A) be whole numbers B) use the lowest possible ratios C) use the values of 1, 2, 3, or 4 D) both choices a and b

A sample of sulfur dioxide occupies a volume of 562 mL at 45.° C and 720 kPa. What volume will the sulfur dioxide occupy at STP?

Name two ways that living things use proteins

Solid lithium metal and diatomic fluorine gas react spontaneously to form a solid product. give the balanced chemical equation (including phases) that describes this reaction.

What is the best way to transform a chemical potential energy into internal kinetic energy?

A reaction starts with 20.0 grams of lithium hydroxide (LiOH) and produces 31.0 grams of lithium chloride (LiCl), what is the percent yield of lithium chloride (LiCl) ? * LiOH + KCl - LiCl + KOH A) 64.5% B) 88.6% C) 81.5% D) 92.8%

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take four separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4.