1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
attashe74 [19]
3 years ago
15

At room temperature, a melting solid produces a whitish liquid. A laser beam shined through the liquid is unaffected and produce

s a distinct beam of light. The liquid is _________. a heterogeneous mixture an element a solution a colloid
Chemistry
1 answer:
navik [9.2K]3 years ago
8 0
The answer is a colloid.
You might be interested in
complete the name of an alkali that could react with phosphoric acid to make sodium hydrogen phosphate
elena-s [515]
The answer is sodium hydroxide
7 0
3 years ago
Read the given equation:NH3 + HCI —> NH4CIWhich of the following is true about the equation?a) NH3 is the acid and NH4CI is t
Nutka1998 [239]

Explanation:

For the given equation:

NH3 + HCl -> NH4Cl

This is an acid-base reaction (neutralization): NH3 is a base, HCl is an acid and NH4Cl is the sal.

Answer: b) NH3 is the base and NH4CI is the salt.

8 0
1 year ago
How does a buffer regulate pH?
Alex_Xolod [135]
C is the correct answer.a buffer reacts with the added acid or base which can produce H+ or hydroxide ion,or a kind of removing H+ or hydroxide added to solution.remember that buffers don't prevent additional acid or base from reacting,they react with the additional themselves.the A and D are completely wrong.
6 0
3 years ago
A 10.0-ml sample of 0.200 m hydrocyanic acid (hcn) is titrated with 0.0998 m naoh. what is the ph at the equivalence point? for
ryzh [129]
When the titration of HCN with NaOH is:

HCN (aq) + OH- (aq) → CN-(aq) + H2O(l)

So we can see that the molar ratio between HCN: OH-: CN- is 1:1 :1

we need to get number of mmol of HCN = molarity * volume 

                      = 0.2 mmol / mL* 10 mL = 2 mmol

so the number of mmol of NaOH = 2 mmol according to the molar ratio

so, the volume of NaOH = moles/molarity

                                          = 2 mmol / 0.0998mL

                                          = 20 mL

and according to the molar ratio so, moles of CN- = 2 mmol

∴the molarity of CN- =  moles / total volume 

                                   = 2 mmol / (10mL + 20mL ) = 0.0662 M

when we have the value of PKa = 9.31 and we need to get Pkb

so, Pkb= 14 - Pka

            = 14 - 9.31 = 4.69 

when Pkb = -㏒Kb

         4.69 = -㏒ Kb 

∴ Kb = 2 x 10^-5

and when the dissociation reaction of CN- is:

CN-(aq) + H2O(l) ↔ HCN(aq) + OH- (aq) 

by using the ICE table:

∴ the initials concentration are:

[CN-] = 0.0662 M

and [HCN] = [OH]- = 0 M

and the equilibrium concentrations are:

[CN-] = (0.0662- X)

[HCN] = [OH-]= X

when Kb expression = [HCN][OH-] /[CN-]

by substitution:

2 x 10^-5 = X^2 / (0.0662 - X)

X = 0.00114 

∴[OH-] = X = 0.00114

when POH = -㏒[OH]

                    = -㏒ 0.00114

POH = 2.94

∴PH = 14 - 2.94 = 11.06



 

7 0
3 years ago
What do you think about this volcanoes? Its for my science project, so be honest or brutally honest as possible. And tell me wha
Anestetic [448]
Wow! That's a cool volcano. In elementary I had to make a volcano and I used clay to make it. But yours kind of looks like a pumpkin... omg sorry... but i was just being honest... haha. Good luck on that! 
4 0
3 years ago
Read 2 more answers
Other questions:
  • FIRST ANSWER GETS CROWNED BRAINLIEST!!!!!!
    15·1 answer
  • Carbonic acid is referred to as _________ acid because it is produced from a gas that evaporates quickly.
    12·1 answer
  • How long does it take me to travel 500 m E at a velocity of 50 m/s E?
    14·1 answer
  • Which of the following is a quantitative property of minerals?
    10·2 answers
  • I NEED HELP!!! I WILL RATE BRAINLIEST!!!!!!!
    10·1 answer
  • Caculate the kinetic energy in J of an electron moving at<br> 6.00x 10 to the sixth power m/s.
    9·1 answer
  • Select the correct answer.
    11·1 answer
  • What is the effect of adding more water to the following reaction at equilibrium? CO2 + H2O H.CO.
    14·1 answer
  • SCIENCE
    15·1 answer
  • If another hydrogen of c2h5cl is replaced by a chlorine atom to yield c2h4cl2, how many isomers would result?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!