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netineya [11]
2 years ago
14

1. Calculate the average atomic mass of rubidium. Rubidium has two isotopes, 85Rb and 87Rb. 85Rb has an atomic mass of 84.912 am

u and occurs at an abundance of 72.17%. 87Rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. Show your work
Chemistry
1 answer:
DiKsa [7]2 years ago
5 0
Just use labels I’m lazy

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A syringe contains 56.05 mL of gas at 315.1 K. What volume will that gas occupy if the temperature is increased to 380.5 K?
Marianna [84]

This is one of the ideal gas laws. Presumably the pressure remains the same so it is not part of the givens.

Formula

V / T = V1 / T1

Givens

  • V = 56.05 mL
  • T = 315.1 degrees Kelvin
  • V1 = x
  • T1 = 380.5  degrees Kelvin

Solution

56.05/315.1 = x/380.5                  Simplify the left.

0.1779 = x / 380.5                        Multiply both sides by 380.5

0.1779 * 380.5 = 380.5x/380.5

67.68 mL  = x                                This is your answer


5 0
3 years ago
Read 2 more answers
What is a period on the Periodic Table? *
ella [17]

Answer:

Explanation:En la tabla periódica los elementos están ordenados de forma que aquellos con propiedades químicas semejantes, se encuentren situados cerca uno de otro. Los elementos se distribuyen en filas horizontales, llamadas períodos.

8 0
3 years ago
Define the main temperature, precipitation, location and soil characterisitcs of the following Biomes.
PIT_PIT [208]

Answer:

Tundra :a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen.

Temperate grasslands are characterized as having grasses as the dominant vegetation.

Tropical rainforests are rainforests that occur in areas of tropical rainforest climate in which there is no dry season – all months have an average precipitation of at least 60 mm – and may also be referred to as lowland equatorial evergreen rainforest.

4 0
2 years ago
explain why the hydrogen atoms in a hydrogen gas molecule form nonpolar covalent bonds but oxygen and hydrogen atoms in water mo
marishachu [46]

Answer:

Explanation:

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.  

The atom with larger electronegativity attract the electron pair more towards itself and becomes partial negative while the other atom becomes partial positive.

Non polar covalent bond:

It is the bond where both bonded atoms share the pair of electron equally.

For example:

Hydrogen gas (H₂) is non polar covalent compound because the electronegativity of both bonded atoms are same. No poles are created that's why this is non polar covalent compound.

Polar covalent bond:

It is the bond where both bonded atoms share the pair of electron unequally.

For example:

In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive and bond is polar.

7 0
4 years ago
1. True or false, phosphorus-33 is an isotope
SIZIF [17.4K]

Answer:

It's an ion, so false

Explanation:

isotope if for mass, while the -33 is the charge, that would make it an ion

Hope this helps

6 0
3 years ago
Read 2 more answers
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