Answer:
can you send me a picture of what layer a and look b look like and then I will be able to evaluate
Answer:
D) 21.9
Explanation:
1 kilocalorie is equal to 4184 joules
0.001 kilocalorie is equal to 1 calorie
so 5.25 calorie=21.966 joules
Answer:
the material has two different color crystals
Explanation:
Selenium should be correct. I don’t know if you just clicked on it And waited to submit or if you got it wrong. Anything in the halogens (which is the second column) that your looking at) would be very reactive.
Answer:
10 moles
Explanation:
of moles = given mass /atomic mass = 280 g /28 g = 10 moles of Si atoms in 280g sample.