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- 1. Multiple Choice
Which of the following is indicates as a chemical properties?
Volume
Luster
Density
Corrosivity
- 2. Multiple Choice
A(n) .......................... is a transition from one state of matter to another.
Phase change
Intensive change
Extensive change
Chemical change
- 3. Multiple Choice
A percentage determined by the ratio of the mass of each element to the total mass of the compound is called the ........................... .
Molar mass
Percent by mass
Atomic mass
Percent weight
- 4. Open Ended
What is the differences between mixture and substances?
- 5. Open Ended
Define physical change?
- 6. Open Ended
Seawater is composed of salt, sand, and water. Is sea water a heterogeneous or homogeneous mixture? Explain.
- 7. Multiple Choice
Cooking egg identified as ........................
Chemical change
Physical change
- 8. Multiple Choice
What is the mass of a product if the reactants have mass of 44.6 grams (Iron) and 12.8 grams (Oxygen)
31.8 grams
571 grams
57.4 grams
3.48 grams
- 9. Multiple Choice
Identify the product in this chemical reaction?
Methan + Oxygen
Carbon dioxide + Oxygen
Carbon dioxide + Water
Oxygen + Water
- 10. Multiple Choice
When a 9.0 g piece of magnesium ribbon, Mg, is heated in 8.0 g of oxygen atmosphere, O2, white ashes of magnesium oxide, MgO, are formed according to the reaction below:
1.0 gram
17.0 grams
72.0 grams
14.0 grams
- 11. Multiple Choice
Compound is made from the atoms one or two or more elements that are chemically combined.
True
False
- 12. Multiple Choice
The periodic table organizes the elements into a grind of horizontal rows called ......................... .
Families
Groups
Periods
Friends
- 13. Multiple Choice
If 3.5 g of X reacts with 10.5g of Y to form the compound XY, what is the percent by mass of X in the compound?
25%
50%
75%
14%
- 14. Open Ended
Define an electron?
- 15. Multiple Choice
The nucleus is ....................... charged
Positively
Negatively
Neutral
- 16. Open Ended
Explain why atoms are electrically neutral?
- 17. Open Ended
Atoms are made of three subatomic particles identify them?
- 18. Multiple Choice
what is the process that turns a gas to liquid ?
Melting
Condensation
Freezing
Evaporation
- 19. Multiple Choice
What are the state of matter ?
Solid , Liquid , Juice
Solid and Liquid
Solid , liquid and Gas
Solid and Gas
- 20. Open Ended
Two decomposition of 18.0g of water resulting in 16.0 g of Oxygen and 2.0 g of Hydrogen. Find the mass ratio of Oxygen-to-Hydrogen.
- 21. Multiple Choice
What is the number of neutron ?
12
11
10
9
- 22. Multiple Choice
What is the proton number ?
12
11
10
9
- 23. Multiple Choice
Who made this experiment?
Thomson
Milikan's
Rutherford's
- 24. Multiple Choice
Who made this experiment ?
Milikan's
Retherford's
Thomson
- 25. Fill in the Blank
What is the difference between gas and vapour?
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