Question

I tried science but no reply. A teen is making iced coffee and would like it sweeter but is unable to get the sugar to dissolve.

What method could dissolve more sugar in the iced coffee?

A.
Add the sugar right after the coffee has brewed, while it is still hot.

B.
Keep adding sugar at longer time intervals.

C.
Wait for the ice to dissolve to then add sugar.

D.
Measure the amount of sugar more accurately.

Answer 1

a?

Answer 2

A add the sugar right after. The heat speeds up the molecules. more speed means more collisions, which means more dissolving.

Answer 3

help with another?

Answer 4

yeah sure :)

Answer 5

Which is a description of a precipitation reaction?

A.
Potassium iodide is added to lead nitrate to produce an insoluble yellow solid, lead iodide.

B.
Sulfuric acid combines with sodium hydroxide to produce water and sodium sulfate.

C.
Lead combines with oxygen to produce lead oxide.

D.
Water decomposes to form hydrogen and oxygen.


thanks

Answer 6

precipitation reactions occur when an insoluble ionic solid is created, therefore the answer is A.

Answer 7

Thanks! A few more please??

Answer 8

bring it on :p

Answer 9

lol ok!

Answer 10

Which chemical equation describes the balanced reaction between lead and oxygen to form lead oxide?

A.
2Pb + 2O2 → 2Pb2O3

B.
Ld + O2 → Ld2O3

C.
4Pb + 3O2 → 2Pb2O3

D.
4Ld + 3O2 → 2Ld2O3

Answer 11

First of... periodic table tells us that lead is Pb, ruling out B and D

Answer 12

to choose between A and C, we need to see which is balanced, right now there are 2 lead molecules and 6 Oxygen molecules on the right side for both, so which equation has that same amount of molecules on the left side?

Answer 13

do you see it? multiply the 3 by the 2 on the other side of the O and you get 6 Oxygen molecules, therefore the answer is C

Answer 14

Oh ok!!!

Answer 15

This reaction is an explosive reaction of a strong acid combining with a strong base.

H2SO4 + 2NaOH → 2H2O + Na2SO4

Which compounds are the reactants and which are the products?

A.
reactants: H2SO4 + 2NaOH
products: 2H2O + Na2SO4

B.
reactants: 2NaOH + Na2SO4
products: H2SO4 + 2H2O

C.
reactants: 2H2O + Na2SO4
products: H2SO4 + 2NaOH

D.
reactants: H2SO4 + 2H2O
products: 2NaOH + Na2SO4

Answer 16

reactants are the left side products are the right

Answer 17

ok

Answer 18

Which is the properly balanced equation that shows the synthesis of limewater, Ca(OH)2, from calcium oxide and water?

A.
CaO + H2O → Ca(OH)2

B.
Ca(OH)2 → CaO + 2H2O

C.
CaO + 2H2O → Ca(OH)2

D.
Ca(OH)2 → CaO + H2O

Answer 19

A

Answer 20

Which statement about a compound on this pH scale explains why it is a base?
Missing Metadata

A.
RbOH is a base because its pH is greater than 7.

B.
HCl is a base because it is the lowest number on the pH scale.

C.
HIO3 is a base because its pH is closest to 7.

D.
HBr is a base because its pH falls between 1 and 7.

Answer 21

I feel like something is missing..

Answer 22

lol yeah

Answer 23

http://static.k12.com/calms_media/media/943500_944000/943744/1/51ffdb8518b0029b19ec9661f45e3b641a41ec34/MS2_PHY_03_18_Q.jpg

Answer 24

bases are above 7

Answer 25

so letter A :)

Answer 26

I would love to help you some more but I have a US Government exam to get to.

Answer 27

ok thanks for all your help!!!

Answer 28

anytime :)

Answer 29

I know temperature affects solubility. So when whenever the mixture is hot the sugar must be added as it would dissolve faster at higher temperatures.

Answer 30

thanks!