the relative atomic mass of boron 10.2.if the element occurs in two isotopic forms,boron-10 and boron-11 ,what are their geometrical abundances?

Answers

Answer 1

Answer: The correct answer for the question that is being presented above is this one:

Boron consists of two isotopes, boron-10 and boron-11.
Given that its relative atomic mass is 10.2

Find the abundance of each isotope.

Let y/100 = the abundance of copper-10
and (100 - y)/100 = the abundance of copper-11

10.2 = (y/100 x 10) + [(100 - y)/100 x 11]
10.2 = 10y/100 + 1100/100 - 11y/100
1020 = 10y + 1100 - 11y
-80 = -y
y = 80

Abundance of boron-10 = 10/100 = 10%

Abundance of boron-11 = 100 - 10 = 90%

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The correct answer to the question that is stated above is the third option which is: rapidly spinning protogalactic clouds

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OSHA standards appear in the ___________ and are then broken down into ____________.

Answers

OSHA standards appear in the Code of Federal Regulations (CFR) and was then broken down into two parts. It contains standards to ensure a comfortable and high quality research tools like the databases. These standards are to be strictly monitored to ensure the safety of workers.

The answer is

OSHA standards appear in the Code of Federal Regulations (CFR) and was then broken down into two parts.

The explanation:

OSHA standards are rules that describe the methods that employers must use to protect their employees from hazards. There are OSHA standards for Construction work, Maritime operations, and General Industry, which is the set that applies to most worksites. These standards limit the amount of hazardous chemicals workers can be exposed to, require the use of certain safe practices and equipment, and require employers to monitor hazards and keep records of workplace injuries and illnesses

It contains standards to ensure a comfortable and high quality research tools like the databases. These standards are to be strictly monitored to ensure the safety of workers.

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D. Ionic bond

Answers

ionic bonds is a type chemical bond formed through an electrostatic attraction between two opposite charged ions.

covalent bond involves a pair of electrons being shared between atoms.

Answer

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Answers

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Answers

The four basic blood types are: A, B, AB and O.

Answer:

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Under which conditions of temperature andpressure does a real gas behave most like an
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(1) 37 K and 1 atm (3) 347 K and 1 atm
(2) 37 K and 8 atm (4) 347 K and 8 atm

Answers

Ideal gas law is valid only for ideal gas not for vanderwaal gas. The correct option is option C that is at 347 K and 1 atm, the real gas will behave as ideal gas.

What is ideal gas equation?

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of ideal gas

V= volume of ideal gas

n =number of moles of ideal gas

T =temperature of ideal gas

R = Gas constant = 0.0821 L.atm/K.mol

If a real gas or vanderwaal gas wants to follow the above equation that gas has to be at high temperature and low pressure.

Therefore the correct option is option C that is at 347 K and 1 atm, the real gas will behave as ideal gas.

To learn more about ideal gas equation, here:

brainly.com/question/14826347

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(3) 347 K and 1 atm is the correct one because a real gas behaves most like an ideal gas at high temperature and low pressure.

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