Chemistry, 13.10.2019 01:30 kingcory6230

Scientists think the earth is approximately years old.
2 billion
3 billion
4 ½ billion
6 ½ billion

Answers: 2

Show answers

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 21:30, keke6361

Sex cells from female reproductive organ? 1) mitosis 2) fertilization 3) zygote 4) eggs 5) meiosis 6) sperm

Answers: 2

continue

Chemistry, 22.06.2019 21:30, KallMeh

8. what happens to matter during a chemical reaction

Answers: 1

continue

Chemistry, 23.06.2019 07:30, jessicawelch25

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.

Answers: 2

continue

Chemistry, 23.06.2019 14:00, Lhuckabee

Which of the following represents the balanced reduction half-reaction from the redox reaction? (2 points) pb + pd(no3)2 yields pb(no3)2 + pd pb yields pd2+ + e- pd2+ + 2e- yields pd pb + e- yields pb 2 pd2+ + 4 e- yields 2 pd

Answers: 1

continue

You know the right answer?

Scientists think the earth is approximately years old.
2 billion
3 billion
4 ½ bi...