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Questions in chemistry

[Sagot para sa’yo] give the mass number of an atom that has 10 protons 10 electrons and 11 neutrons

[Sagot para sa’yo] give 10 example of first class lever

[Sagot para sa’yo] is argon matalic or not

[Sagot para sa’yo] Name one example of gas that you see in your everyday life and explain why you classify it as gas

[Sagot para sa’yo] CH2-CH3 | CH3-CH2-C-CH2-CH2 | | CH3 CH3

[Sagot para sa’yo] when would magnets be useful to separate things

[Sagot para sa’yo] Part 1: Types of Chemical Reactions Directions: Classify the following unbalanced chemical equations according to the six types of chemical reactions. (Combination, Decomposition, Single Displacement, Double Displacement, Combustion or Acid – Base Reaction) Reactions Chemical Equations Types of Chemical Reactions 1 CH4 + O2 CO2 + 2H2O 2 NaNO3 NaNO2 + O2 3 Fe + NaBr FeBr + Na 4 H2SO4 + NaOH NaSO4 +H2O 5 CaO + H2O Ca (OH)2 6 NH4OH +HBr H2O + NH4Br 7 C8H18 + O2 CO2 + H2O 8 P4 + O2 P2O6 9 KNO3 KNO2

[Sagot para sa’yo] what is the defference between the processes of evaporation and filtering

[Sagot para sa’yo] Part 2: Write the correct phase change occured in each examples. 1 The moth balls Inside my cabinet disappeared without a trace 2. The chocolate in my palm turned to liquid after some time 3. The juice solidify after I placed it in the fridge 4. Frost formed on the surface of a leaf because of the cold weather. 5. The pond dries out during summer time.

[Sagot para sa’yo] Part II ____1. Pure element - only one type of atoms present ____2. Mixture of two elements - two types of uncombined atoms present ____3. Pure Compound - only one type of compound present ____4. Mixture of two compounds - two types of compounds present ____5. Mixture of a compound and an elements Two or more ________ or _______ NOT chemically combined. Mixture can be uniform (called _______) and are known as solution. Mixture can also be non-uniform (called____________)