PLS HELP URGENT

13)
Calculate the atomic mass of C by using the data from carbon isotopes.

The abundance of 12C is 98.93%. 13C is another naturally occurring isotope. What is the percent abundance of 13C?

The mass of 13C is 13.003 amu. Multiply the mass of 13C by its abundance. Report the number to 3 significant digits.

The mass of 12C is 12.000 amu. Multiply the mass of 12C by its abundance. Report the number to 5 significant digits.

Add the last two numbers together to get the atomic mass of carbon. Report the number to 5 significant digits.

Answers

Answer 1

Explanation:

Actually the total abundant of isotopes of any element in the world must sum up to 100 percent. So we initially know that 12c is 98.9 percent. Therefore the remaining of the remains of 100 must be 12

3c = 100%- 98.9

13c= 1.1%

Related Questions

H2(g)+O2(g)→H2O(l) Express your answer as a chemical equation. Identify all of the phases in your answer.

Answers

Phases in the given chemical reaction:

Hydrogen H₂ is in gas (g) phase

Oxygen O₂ is in gas (g) phase.

Water H₂O is in liquid (l) phase.

What is a phase?

A phase in thermodynamics that is a chemically and physically homogeneous or homogeneous amount of substance that can be mechanically separated from a heterogeneous mixture and that can consist of a single substance or a mixture of substances. The three basic phases of matter are solid, liquid, and gaseous (vapor), but others are believed to exist, including crystalline, colloidal, glassy, amorphous, and plasma phases. A phase change is said to have occurred when a phase changes from one form to another.

For the given reaction,

H₂(g) + O₂(g) → H₂O(l)

Hydrogen and oxygen are present in gaseous phase, while water is in liquid phase.

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3. A solution contains 0.42 moles of solute in 0.75 L. Calculate the molarity of the solution.

Answers

0.56 is the molarity of a solution.

Molarity (M): It is defined as the number of moles of solute per liter of solution, and it is one of the most common units used for the purpose of measuring the concentration of a solution.

To calculate molarity we have three steps:

To Find the number of moles of solute which dissolved in the solution,Find the volume of solution in liters.Later, Divide the moles of solute by liters of solution.

To define the molarity of the solution we have a small formula:

Molarity=moles/Liters-----(1)

Given that

m=0.42

L=0.75

By, substituting the m and L values in equation(1) we get:

Molarity=0.42moles of solution/0.75 L of solution

Molarity=0.56M

Hence, The molarity of this solution is 0.56 M (moles per liter).

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three moles of a monatomic ideal gas undergoes an isochoric process in which the temperature changes from 500 k to 300 k. calculate the change in volume during this process (in m3).

Answers

Change in volume is 0 m3 when three moles of a monatomic ideal gas undergoes an isochoric process in which the temperature changes from 500 k to 300 k.

An isochoric process, also known as a constant-volume process, isovolumetric process, or isometric process in thermodynamics, is a thermodynamic process where the volume of the closed system having undergone such a method remains constant.

In everyday life, we see an isochoric process once we boil the water in a pressure cooker. Because the temperature increase is accomplished at a constant volume, we encounter an isovolumetric process when we transfer heat to the container.

In this problem we have T1=500K T2=300K

Since in isochoric process volume in constant, change in volume = 0

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What is the formula for cobalt(II) nitride?

Answers

Answer:

Co(NO3)2

Explanation:

The chemical formula for cobalt(II) nitride is Co₃N₂ which has 3 and 2 cobalt and nitrogen atoms respectively.

What is chemical formula?

Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Jack can drink a bottle of cider in 6 days. Jill can drink a bottle of cider in 12 days.

Answers

The combined rate when Jack and Jill drink together at their respective speeds ,the bottle of cider will finish in 4 days.

A rate in mathematics is indeed the ratio of two related elements stated in different units.The numerator of the ratio indicates the equivalent rate of increase in the other (dependent) variable if the denominator is given as a single entity of one of these values and it is expected that this number may well be changed consistently (i.e., is an output factor).

Jill drinks in one day= 1/12 bottle

Jack consumes 1/6 bottle in a day.

Together they will drink = 1/12+1/6 = 3/12 = 1/4 bottle

"Per unit of time" is a prevalent rate unit that includes ideas like speed, heart rate, and flux.Electric field ratios, exchange rates, and literacy rates are non-time denominators Hence Jack and Jill will completely drink the bottle in 4 days .

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What type of nuclear reaction occurs in the Sun?

Answers

Hello,

I hope you and your family are doing well!

The nuclear reactions that occur in the Sun are fusion reactions.

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how many electrons are gained in a balanced half-reaction in which chlorine gas is reduced to the aqueous chloride ion?

Answers

Each chlorine atom acquires an electron during the reaction to create a chloride ion (Cl-), which is the process known as reduction.

What is an example of a redox reaction?

A redox reaction is when there is simultaneous oxidation and reduction. CuO+H2→Cu+H2O. Example: In this process, hydrogen is oxidized to water while copper oxide is reduced to copper.

Combination, breakdown, displacement, combustion, and disproportionation are the five primary categories of redox processes.

The definition was eventually expanded to cover additional processes in which electrons are lost, regardless of whether oxygen was present, because it was understood that the material loses electrons when it is oxidized.

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Which of the following is not true about the volume of a gas? O Generally, the volume can be easily changed. O Most of the volume is empty space. O The volume is occupied by particles in continuous, rapid, random motion. O The volume is about 10 times greater than that occupied by an equal number of particles in the liquid or solid state.

Answers

Answer:

O The volume is about 10 times greater than that occupied by an equal number of particles in the liquid or solid state.

what is the reaction between phosphate ion (PO4 3-) and hydronium ion (H3O+)

Answers

Answer:

H3O+(aq) + PO43−(aq) ⇌ HPO42−(aq) + H2O(l)

Notice that the total charge (2-) is the same on both sides of the equation, and that this is reaction can take place in both directions.

Explanation:

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