Chemistry, 30.01.2020 20:05 Robinlynn228
15 !asap i really dont understand it! brainliest!
question 1(multiple choice worth 3 points)
(03.06 mc)
which substance is a heterogeneous mixture?
a) cereal
b) silver
c) nickel
d) shampoo
question 2 (true/false worth 2 points)
(03.06 lc)
heterogeneous mixtures can be physically separated into their individual components.
true
false
question 3 (matching worth 4 points)
(03.06 lc)
match the mixture with its description.
1)colloid
2)emulsions
3)solution
4)homogeneous
a) microscopically insoluble particles that are suspended throughout another substance
b) a solute that is distributed evenly within the solvent
c) two or more liquids that are normally not mixable
d) a mixture that has its different components mixed evenly within the substance
question 4(multiple choice worth 3 points)
(03.06 lc)
which of the following techniques can be used to separate a homogeneous mixture into its component parts?
a) apply pressure
b) sort by color
c) sort by size
d) use magnetism
question 5(multiple choice worth 4 points)
(03.06 mc)
a centrifuge was used to separate a sample into its components. what conclusion about the sample can be formed based on the technique used?
a) it was a pure substance.
b) it was a compound.
c) it was a heterogeneous mixture.
d) it was a homogeneous mixture
question 6(multiple choice worth 4 points)
(03.06 mc)
what makes a pure substance different from a heterogeneous mixture?
a) the components of a pure substance are mixed unevenly instead of evenly within the pure substance.
b) insoluble instead of soluble particles are suspended within the pure substance.
c) two liquids that normally are not mixable are mixed in a heterogeneous mixture.
d) the components of a pure substance are single elements or compounds instead of a mixture of compounds.
Answers: 3
Chemistry, 22.06.2019 01:30
Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .
Answers: 3
Chemistry, 22.06.2019 04:30
Why are people not able to scuba dive in the deep part of the ocean
Answers: 2
Chemistry, 22.06.2019 08:30
7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.
Answers: 1
Chemistry, 22.06.2019 23:40
The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.
Answers: 2
15 !asap i really dont understand it! brainliest!
question 1(multiple choice worth 3 points)...
question 1(multiple choice worth 3 points)...
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