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
son4ous [18]
4 years ago
11

Rubidium has two naturally occurring isotopes, rubidium -85 ( atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium -87 (a

tomic mass = 86.9092; abundance = 27.85%). Calculate the atomic weight of rubidium
Chemistry
1 answer:
son4ous [18]4 years ago
6 0

Answer:

The answer to your question is: 85.458 amu

Explanation:

data

Rubidium-85   A = 84.9118 amu   abundance = 72.15%  

Rubidium - 87  A = 86.9092 amu abundance = 27.85%

Atomic weight = ?

Atomic weight = 84.9118(0.7215) + 86.9092(0.2785)

Atomic weight = 61.2538 + 24.2042

Atomic weight = 85.458 amu

You might be interested in
1 Point
Usimov [2.4K]

Answer:

  • <u><em>B. Structural</em></u>

Explanation:

The <em>atomic </em>or molecular <em>formula </em>represents each kind of atom by its chemical symbol and the number of each kind of atom by a subscript, but it does not show how they are connected. Thus, many different compounds have the same atomic or molecular formula.

The <em>skeletal formula</em> is a kind of abbreviated molecular formula in which the carbon and hydrogen atoms are not indicated but are understood. The skeletal formula shows the chain, the double and triple bonds, and the atoms different to carbon and hydrogen. Each vertex on the chain represents on carbon atom, and the hydrogen atoms (not shown) are the needed to complete the four valence electrons of each carbon atom.

The<em> structural formula </em>shows each atom, using the chemical symbol,  and how they are connected in the compound, i.e. the bonds, using short lines.

For instance, the structural formula for the simplest organic compound, methane, CH₄, is:

              H

               |

       H -  C -  H

               |

              H

4 0
3 years ago
The density of a material is based on... what?<br> answer and there is brainliest!
Aleksandr-060686 [28]

It is based on Relative DENSITY.............

3 0
4 years ago
a sealed container filled with argon gas at 35 c has a pressure of 832 torr. if the volume of the container is decreased by a fa
lesya692 [45]

Answer:

If the volume of the container is decreased by a factor of 2 the pressure is is increased by the same factor to 1664 torr.

Explanation:

Here we have Boyle's law which states that, at constant temperature, the volume of a given mass of gas is inversely proportional to its pressure

V ∝ 1/P or V₁·P₁ = V₂·P₂

Where:

V₁ = Initial volume

V₂ = Final volume = V₁/2

P₁ = Initial pressure = 832 torr

P₂ = Final pressure  = Required

From V₁·P₁ = V₂·P₂ we have,

P₂ = V₁·P₁/V₂ = V₁·P₁/(V₁/2)

P₂  = 2·V₁·P₁/V₁ = 2·P₁ = 2× 832 torr = 1664 torr

6 0
3 years ago
Read 2 more answers
As the pressure on a gas confined above a liquid increases, the solubility of the gas in the liquid
Gelneren [198K]
As the pressure on the on a gas cofined above a liquid increases, the solubility of the gas will increase

this also happen when we lower the temperature
4 0
3 years ago
Read 2 more answers
Which of the following is a primary way in which proteins are used in the body?
Luda [366]

Answer:

D

Explanation:

Transport proteins carry substances throughout your bloodstream — into cells, out of cells or within cells. The substances transported by these proteins include nutrients like vitamins or minerals, blood sugar, cholesterol and oxygen.

3 0
3 years ago
Read 2 more answers
Other questions:
  • If you put magnets together and allow them to arrange themselves, how will the poles be aligned?
    5·1 answer
  • In an energy diagram, the reactants are at a higher potential energy compared to the products. Which of the following best descr
    6·2 answers
  • A compound contains 57.2 percent carbon, 6.1 percent hydrogen, 9.5 percent nitrogen, and 27.2 percent oxygen. What the empirical
    14·1 answer
  • What mass of gold is produced when 24.4 a of current are passed through a gold solution for 46.0 min ?
    8·1 answer
  • What percentage of energy used in the u.s is produced from fossil fuels
    7·1 answer
  • Which substance forms a major component of matter in a plasma state?
    13·1 answer
  • What units do we use to calculate the volume of any substance? (sixth grade level)
    11·1 answer
  • What is the number of protons in the nucleus of an atom equivalent to?
    12·1 answer
  • Which statement best explains how the conditions identified in Part A affect the availability of opal?​
    10·1 answer
  • Humanities !
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!