CHEMISTRY HIGH SCHOOL

Which of the isotopes is the most abundant isotope in the sample?Cd-106
Cd-108
Cd-112
Cd-114
Cd-116

Answers

Answer 1
Answer:

Answer: Cd-112

Explanation: to find out the most abundant isotope, look at the weighted average on the periodic table. the one closest to it in mass is going to be the most abundant isotope. in this case, the weighted average of cadmium is 112.411, so the answer is Cd-112.

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Plz help me i need to know how to do this!!!
What is a problem commonly associated with nuclear power facilities?(1) A small quantity of energy is produced.(2) Reaction products contribute to acid rain.(3) It is impossible to control nuclear fission.(4) It is difficult to dispose of wastes
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A student has a sample of isopropanol (C3H7OH) that has a mass of 78.6 g. The molar mass of isopropanol is 60.1 g/mol. How many moles of isopropanol are contained in this sample?

Answers

Answer : The number of moles of isopropanol are 1.308 moles.

Solution : Given,

Mass of isopropanol = 78.6 g

Molar mass of isopropanol = 60.1 g/mole

Formula used :

\text{ Number of moles}=\frac{\text{ Given mass}}{\text{ Molar mass}}

Now put all the given values in this formula, we get the number of moles of isopropanol.

\text{ Number of moles}=(78.6g)/(60.1g/mole)=1.308moles

Therefore, 1.308 moles of isopropanol are contained in this sample.
The thing we are asked to calculate here is the amount of the substance in the given sample in units of moles. To obtain this value, the molar mass of the substance is needed. Molar mass has the units of grams per mole so it is a useful value for converting mass into moles.

78.6 g ( 1mol / 60.1g) = 1.31 mol isopropanol

The molecular formula of glucose is C6H12O6. What is the empirical formula of glucose?(1) CHO (3) C6H12O6
(2) CH2O (4) C12H24O12

Answers

The answer is (2) CH2O. The empirical formula means the simplest positive integer ratio of the atoms in the compounds. You can get this form form the molecular formula, divided by 6 for each atom.

A force of 1 700 N is applied to a 1 300 kg car. what is the magnitude of acceleration of the car?

Answers

Hello!

Answer:

\Large \boxed{\sf 1.30 m/s^2}

Explanation:

→ The force applied to an object is equal to:

\sf a = F / m

Where:

- a is the acceleration

- F is the force

- m is the mass

→ So, the acceleration of the car is equal to:

\sf a = F / m \n\n= 1700 N / 1300 kg\n\n \approx 1.30 m/s^2

Conclusion:

The acceleration of the car is 1.30m/s².

Explanation:

acceleration is directly proportional to the force and inversely proportional to the mass of the object

a=f/m

=1700/1300

What is the main pigement for photosyenthesis inchloroplasts

Answers

I assume the answer is chlorophyll (a or b) but could also be carotenoids.

Answer:

the main pigment is chlorophyll.

Explanation:

It is green

The digestion process starts in the _____.esophagus
stomach
small intestine
mouth

Answers

Answer: mouth

Explanation:

The food digestion process in the human or animal body starts in the mouth. The mouth consists of teeth which helps in crushing and grinding of food. The mouth secretes saliva which provides lubrication to the food items. It helps in mixing process of the food so that it can be easily swallowed inside the gut and could enter into the digestive tract.

Your mouth is where the digestion process starts because when yo chew your food, nutrients is released into your body

Based on bond type, which compound has thehighest melting point?
(1) CH3OH (3) CaCl2
(2) C6H14 (4) CCl4

Answers

Based on bond type, CaCI2 has the highest melting point.
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