Calculate the missing mass for the following chemical equations. 41. 4Al + 302 → 2A1,0,
13g + _ → 67g

42. 2H2 + O2 → 2H 0
→ 679
18.5g + 6.5g → _

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

Amixture with the same composition throughout is!