Chemistry, 30.09.2019 21:20 monnn91351
3. the chemical formula of a compound does not indicate
the identity of the elements in the compound
how elements are joined in the compound
the composition of the compound
the relative proportions of the elements in the compound
4. in the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water,
which of the following is a reactant?
sucrose
carbon dioxide
water
heat
5. which of the following is not a physical change?
grating cheese
melting cheese
fermenting of cheese
mixing two cheeses in a bowl
6. a chemical change occurs when a piece of wood
is split
is painted
decays
is cut
7. which of the following does not indicate that a chemical change may have taken place?
fracture formation
gas production
precipitate formation
energy transfer
8. what happens to matter during a chemical reaction?
matter is neither destroyed or created.
some matter is destroyed.
some matter is created.
some matter is destroyed and some is created.
Answers: 1
Chemistry, 21.06.2019 20:30
This chart represents the melting point of several substance. what besy explains the high melting point of the salt?
Answers: 2
Chemistry, 22.06.2019 11:30
If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood
Answers: 2
Chemistry, 22.06.2019 16:00
Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy
Answers: 1
3. the chemical formula of a compound does not indicate
the identity of the elements in the...
the identity of the elements in the...
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