FREE AND STUDY GAMES ABOUT CHEMFINALAH EXAM

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FREE AND STUDY GAMES ABOUT CHEMFINALAH EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -103 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: what is the compound formed by combining carbon with oxygen

Answer:

carbon dioxide

Question 2: carbon cycle refers to

Answer:

movement of carbon through living organisms, the atmosphere, the sea, and the earth

Question 3: pure substance

Answer:

an element of a compound

Question 4: octa

Answer:

8

Question 5: cataylyst

Answer:

chemical substance that participates in a chemical reaction and influences its speed with undergoing permanent change

Question 6: nona

Answer:

9

Question 7: speed of light in air

Answer:

does not depend on wavelength or frequency

Question 8: atomic number

Answer:

number of protons in an atom of that element. example: H contains 1 proton,=atomic mass of 1

Question 9: single covalent bond

Answer:

formed when only one pair of shared electrons forms the linkage bewteen atoms

Question 10: tri

Answer:

3

Question 11: covalent bonds

Answer:

a chemical nond in which two electons are shared by the atom involved

Question 12: mixture

Answer:

physical combinations of two or more substances present in variable amounts

Question 13: what is the unit for concentration of ).00004%

Answer:

pph

Question 14: lewis structure

Answer:

representation of an atom or molecule that shows its outer electrons

Question 15: atoms

Answer:

what all matter is composed of super small particles smallest unit of an element that can exist as a stable, independent entity

Question 16: outer valence electrons

Answer:

found in the highest energy level and help to account for many of the observed trends in chemical properties

Question 17: periodic properties

Answer:

elements are sequenced in order of increasing atomic number, they have similar chemical propterits fall in the same columns

Question 18: law of conservation of mass and matter

Answer:

mass is neither created nor destroyed in new substance.Question 19: what explanation accounts for the fact that on average cloudy nights are warmer than clear nights

Answer:

clouds are composed of water vapor and H2O is a strong greenhouse gas

Question 20: deca

Answer:

10

Question 21: what practices might be described as carbon sequestration

Answer:

pumping carbon dioxide deep into ocean,increasing combustion of fossil fuels

Question 22: compound

Answer:

element of a compound made up of two or more

Question 23: metals

Answer:

elements that are shiny and conduct electricity and heat

Question 24: what forms by cmonining an oxygen atom with an oxygen molecule

Answer:

ozone Question 25: which occurrences or processess are expected to reduce the level of atmospheric carbon

Answer:

decaying plants and animal,the growth of trees

Question 26: matter

Answer:

anything that has mass and occupies space Question 27: the wavelength of light in the xray region of the electromagnetic spectrum is

Answer:

about the size of a bacterial cell and virus

Question 28: penta

Answer:

5