A

How many grams of KBr would make a saturated solution at 80'C?

• 100 g

• 50 g

• 60 g

• 10 g

125 grams of which TWO solutes would make saturated solutions at 72'C?

• KNO3 and NaNO3

• KNO3 and KBr

• NaCl and KNO3

• NaCl and KBr

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

You can make a solute dissolve more quickly in a solvent by

• adding more solute.

• adding ice.

• heating the solvent.

• removing some solvent.

Tags

NGSS.MS-PS1-4

A supersaturated solution is one that....

• contains the maximum amount of dissolved solute.

• contains LESS solute than a saturated solution.

• contains MORE solute than can normally be dissolved

• has been stirred.

You have 2 liters of a saltwater solution. If you are able to dissolve more salt in the solution, which of the following is true?

• The solution is unsaturated.

• The solution is saturated.

• The solution is supersaturated.

At 30'C, which substance has the lowest solubility?

• KNO3

• KBr

• NaCl

• Yb2(SO4)3

At which temperature do KBr and KNO3 have the same solubility?

• 60

• 55

• 50

• 22

The non living parts of an ecosystem

• abiotic factors

• biotic factors

• oxygen

• soil

Tags

NGSS.MS-LS2-3

the living parts of an ecosystem

• biotic factors

• biology

• abiotic factors

• animals

Tags

NGSS.MS-LS2-2

Which of these lists contain only abiotic factors?

• rocks, soil, lichens

• lichens, mosses, complex plants

• cattle, camels, cattails

• dissolved oxygen, salinity, sunlight

Tags

NGSS.MS-LS2-3