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
Mrrafil [7]
3 years ago
5

Which of these are broken down during chemical,but not physical,changes

Chemistry
1 answer:
KIM [24]3 years ago
7 0

Which of these what?

This isn't clear, can you put the answer choice or something?

You might be interested in
Theoretically, how many moles of carbonic acid will be produced by 3.00 g sample of NaHCO3?
Kryger [21]
NaHCO3 = 22.99 + 1.008 + 16(3) = 83.99 g/mol 

Na = 22.99g/83.99 g weight of molecule =.2727 or 27.27% 

3.0 g* .2727 = 0.8211 grams of sodium in sample of NaHCO3 

0.8211 grams Na + 1.266 grams Cl = 2.087 grams
7 0
3 years ago
Which of the following types of radiation has the greatest ability to penetrate matter
Tcecarenko [31]
You did not specify the types, but I believe the answer would be gamma radiation.
7 0
3 years ago
Calculate the pH at the equivalence point for the titration of 0.110 M methylamine (CH3NH2) with 0.110 M HCl. The Kb of methylam
nikklg [1K]
The reaction between the reactants would be:

CH₃NH₂ + HCl ↔ CH₃NH₃⁺ + Cl⁻

Let the conjugate acid undergo hydrolysis. Then, apply the ICE approach.

             CH₃NH₃⁺ + H₂O → H₃O⁺ + CH₃NH₂
I                0.11                       0             0
C               -x                          +x           +x
E            0.11 - x                     x             x

Ka = [H₃O⁺][CH₃NH₂]/[CH₃NH₃⁺]

Since the given information is Kb, let's find Ka in terms of Kb.

Ka = Kw/Kb, where Kw = 10⁻¹⁴

So,
Ka = 10⁻¹⁴/5×10⁻⁴ = 2×10⁻¹¹ = [H₃O⁺][CH₃NH₂]/[CH₃NH₃⁺]
2×10⁻¹¹ = [x][x]/[0.11-x]
Solving for x,
x = 1.483×10⁻⁶ = [H₃O⁺]

Since pH = -log[H₃O⁺],
pH = -log(1.483×10⁻⁶)
<em>pH = 5.83</em>


4 0
3 years ago
The speedometer in a car does not measure the car’s velocity because velocity is
gogolik [260]

Answer:

Speed in a specific direction

Explanation:

3 0
3 years ago
Read 2 more answers
Classify each of the following as a strong acid or a weak acid and indicate how each should be written in aqueous solution. Clas
JulijaS [17]

Answer:

HCN, weak acid

H⁺, Br⁻, strong acid

Explanation:

Hydrocyanic acid is a weak acid, according to the following equation.

HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)

Thus, it should be written in the undissociated form (HCN).

Hydrobromic acid is a strong acid, according to the following equation.

HBr(aq) ⇒ H⁺(aq) + Br⁻(aq)

Thus, it should be written in the ionic form (H⁺, Br⁻).

7 0
3 years ago
Other questions:
  • An adult rhino xan have a mass of 1400 kg the mass of a small egret is about 0.76kg. what is the radio of these two masses? how
    11·1 answer
  • 28.5g of iron shot is added to a graduate cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL , From th
    8·1 answer
  • Which conditions are necessary for a lunar eclipse to occur?
    6·2 answers
  • Which landforms might you see at a divergent plate boundary? Check all that apply. mid-ocean ridge mountain range rift valley vo
    6·2 answers
  • How much Sr(OH)2 • 8 H2O (M = 265.76) is needed to
    12·1 answer
  • A scientist made careful measurements of the pressure and temperature of many different gases. Based on these measurements, he c
    7·1 answer
  • What is the mass of 5.8 moles of H2S
    15·1 answer
  • A golfer hits a ball (m = 50. G) causing it to the leave its fairway lie with a velocity of 32 m/s. Determine the change in mome
    15·1 answer
  • Sugar solution and steel are both mixtures. Which statement correctly compares them?
    8·2 answers
  • How many moles of xenon trioxide are present in 1. 69 grams of this compound.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!