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- Multiple ChoicePlease save your changes before editing any questions.
Which of the following is indicates as a chemical properties?
Volume
Luster
Density
Corrosivity
- Multiple ChoicePlease save your changes before editing any questions.
A(n) .......................... is a transition from one state of matter to another.
Phase change
Intensive change
Extensive change
Chemical change
- Multiple ChoicePlease save your changes before editing any questions.
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
- Open EndedPlease save your changes before editing any questions.
What is the differences between mixture and substances?
- Open EndedPlease save your changes before editing any questions.
Define physical change?
- Open EndedPlease save your changes before editing any questions.
Seawater is composed of salt, sand, and water. Is sea water a heterogeneous or homogeneous mixture? Explain.
- Multiple ChoicePlease save your changes before editing any questions.
Cooking egg identified as ........................
Chemical change
Physical change
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Identify the product in this chemical reaction?
Methan + Oxygen
Carbon dioxide + Oxygen
Carbon dioxide + Water
Oxygen + Water
- Multiple ChoicePlease save your changes before editing any questions.
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
- Multiple ChoicePlease save your changes before editing any questions.
Compound is made from the atoms one or two or more elements that are chemically combined.
True
False
- Multiple ChoicePlease save your changes before editing any questions.
The periodic table organizes the elements into a grind of horizontal rows called ......................... .
Families
Groups
Periods
Friends
- Multiple ChoicePlease save your changes before editing any questions.
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%
- Open EndedPlease save your changes before editing any questions.
Define an electron?
- Multiple ChoicePlease save your changes before editing any questions.
The nucleus is ....................... charged
Positively
Negatively
Neutral
- Open EndedPlease save your changes before editing any questions.
Explain why atoms are electrically neutral?
- Open EndedPlease save your changes before editing any questions.
Atoms are made of three subatomic particles identify them?
- Multiple ChoicePlease save your changes before editing any questions.
what is the process that turns a gas to liquid ?
Melting
Condensation
Freezing
Evaporation
- Multiple ChoicePlease save your changes before editing any questions.
What are the state of matter ?
Solid , Liquid , Juice
Solid and Liquid
Solid , liquid and Gas
Solid and Gas
- Open EndedPlease save your changes before editing any questions.
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.
- Multiple ChoicePlease save your changes before editing any questions.
What is the number of neutron ?
12
11
10
9
- Multiple ChoicePlease save your changes before editing any questions.
What is the proton number ?
12
11
10
9
- Multiple ChoicePlease save your changes before editing any questions.
Who made this experiment?
Thomson
Milikan's
Rutherford's
- Multiple ChoicePlease save your changes before editing any questions.
Who made this experiment ?
Milikan's
Retherford's
Thomson
- Fill in the BlankPlease save your changes before editing any questions.
What is the difference between gas and vapour?