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
lawyer [7]
3 years ago
12

The percent by mass of copper in CuBr2 is Use mc004-1.jpg. 28.45%. 44.30%. 63.55%. 71.55%.

Chemistry
2 answers:
maxonik [38]3 years ago
8 0

i believe it is A on e2020

Greeley [361]3 years ago
3 0
First, we must find the total mass of CuBr₂:
Mass = 64 + 2 x 80
Mass = 224

Percentage mass of copper = mass of copper x 100 / total mass
Percentage mass of copper = (64 / 224) x 100
Percentage mass of copper = 28.45%
You might be interested in
(image attached)
Naily [24]

Answer:

D) He did not multiply the chlorine and oxygen atoms by the coefficient 4.

Explanation:

The coefficient 4 at the beginning of the chemical formula indicates that there are four Ca(ClO3)2 molecules. Think of this as Ca(ClO3)2 × 4. This means that he had to multiply the number of atoms for each element by 4 as well, so he should've ended up with 4 total calcium atoms (which is correct), 8 total chlorine atoms, and and 24 total oxygen atoms. He did not get all these answers because he didn't multiply the chlorine and oxygen atoms by the coefficient 4.

8 0
3 years ago
Read 2 more answers
The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows: 2C8H18 (l) 25 O2(g) --> 16 CO2
Svet_ta [14]
The ratio of mole number of the reactants and products is equal to the coefficients. So the answer is a. 18.75 mol. b. 35.1 g. c. 1.38 * 10^5 g.
7 0
3 years ago
Read 2 more answers
Lead (11) oxide dissolves in both
inn [45]

Answer:

bacic

Explanation:

it is very soluble in water

7 0
3 years ago
A student compares the boiling point of substances having different intermolecular forces. which dependent variable did the stud
Gwar [14]

A student compares the boiling point of substances having different intermolecular forces. <u>Boiling points of various substances</u> is the dependent variable that student most likely use.

<h3>Does the nature of intermolecular forces present in different substance affect their boiling points?</h3>

The boiling point of a substance is proportional to the strength of its intermolecular forces, the higher the boiling point, the stronger the intermolecular forces. We can compare the strengths of intermolecular forces by comparing the boiling points of different substances.

<h3>What properties are affected by intermolecular forces?</h3>

Intermolecular forces are measured by boiling points.

Intermolecular forces increase as bond polarization increases.

Ionic > hydrogen bonding > dipole dipole > dispersion is the order of the strength of intermolecular forces (and thus their impact on boiling points).

<h3>How can you determine strong and weak intermolecular forces?</h3>

Substances with strong intermolecular forces are very attracted to one another and are held together tightly. These substances require a great deal of energy to separate, whereas substances with weak intermolecular forces are held together very loosely and have weak interactions.

Learn more about intermolecular forces:

<u><em>brainly.com/question/13479228</em></u>

#SPJ4

7 0
1 year ago
Which is the correct formula for potassium sulfite
rusak2 [61]

Explanation:

K2SO3

hope it helps!

.....

3 0
3 years ago
Other questions:
  • Exposure to what type of radiant energy is sensed by human skin as warmth?
    7·2 answers
  • In which state of matter would you expect to find water, at 20°C on Earth?
    13·1 answer
  • Water condenses onto grass in the early morning when the air is clear because...
    13·2 answers
  • If 1.2 moles of ideal gas occupy a volume of 18.2 L at a pressure of 1.8 ATM what is the temperature of gas in degrees Celsius.
    10·1 answer
  • an ------ model with dark bands representing energy levels shows where an atoms electrons are most likely to be.
    11·1 answer
  • My sister is a peach" is a metaphor.<br><br><br> TrueFalse
    8·1 answer
  • luminous objects such as flashlights emit light that we can see. how do we see an object that isnt luminous?
    11·1 answer
  • Do you Believe in soulmates why or why not
    14·2 answers
  • Which area of chemistry best links the use of titanium and plastics in artificial bone and joint replacements?
    14·1 answer
  • 100 PONTS AND BRAINLIEST <br><br> What is the maximum number of formula units of NaCl in one mole?"
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!