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i m a student of class 9 . The 2nd chepter of our chemistry book is chemical combinations.i can't understand this chepter if u have any solution then tell me

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What is the mass of 2.2 x 109 CO2 molecules?

To calculate the mass of 2.2 x 10^9 CO2 molecules, you would first determine the molar mass of one CO2 molecule (44.01 g/mol). Then, multiply the molar mass by the number of molecules given (2.2 x 10^9) to find the mass. The mass of 2.2 x 10^9 CO2 molecules would be approximately 96.82 grams.


What is The number of DNA molecules present in a duplicated chromosome is?

2 DNA molecules College Biology Chapter 9


How many total atoms are in 3 molecules of CO2 (carbon dioxide)?

Each molecule of carbon dioxide (CO2) contains one carbon atom and two oxygen atoms, totaling three atoms per molecule. Therefore, in 3 molecules of CO2, there are 3 carbon atoms and 6 oxygen atoms, resulting in a total of 9 atoms.


How many moles of THC C21H30O2 does this 27 nanogram represent and how many molecules?

To find the number of moles of THC in 27 nanograms, you first need to convert nanograms to grams (1 ng = 1e-9 g). Then use the molar mass of THC (C21H30O2) to convert grams to moles. Next, you can calculate the number of molecules using Avogadro's number (6.022e23 molecules/mol). The exact calculations would be: (27e-9 g THC) / (314.46 g/mol THC) = 8.59e-11 moles, and (8.59e-11 moles) * (6.022e23 molecules/mol) = 5.17e13 molecules.


What number can be added to 18 to get 27?

18+x=27 calculate and your answer should be 9.


The sum of p and 9?

If you replace some number for "p", you can calculate the sum. Otherwise, just write it as "p+9" - you can't simplify this.If you replace some number for "p", you can calculate the sum. Otherwise, just write it as "p+9" - you can't simplify this.If you replace some number for "p", you can calculate the sum. Otherwise, just write it as "p+9" - you can't simplify this.If you replace some number for "p", you can calculate the sum. Otherwise, just write it as "p+9" - you can't simplify this.


Which one has more molecules 9 g of water or 9 g of suger (C12 H22 O11)?

Since the molecular mass of water is about 18 and the molecular mass of C12H22O11 is about 342, it takes considerably more molecules of water to make up 9 g than molecules of C12H22O11 to get the same mass.


How Calculate 27 with number 1 3 4 and 9?

(4^3)-(3^3)-(9+1)


What is the base number if the number is 729 and the exponent is 3?

To find the base number when the number is 729 and the exponent is 3, you need to calculate the cube root of 729. The cube root of 729 is 9, since (9^3 = 729). Therefore, the base number is 9.


How do you calculate a range?

Takeaway the highest number from the lowest number For example: 2,2,3,4,5,9,11 The range would be 11-2=9


What is the standard deviation of 9?

You need more than one number to calculate a standard deviation, so 9 does not have a standard deviation.


How many ATP and NADPH are required to fix one CO2 molecule?

9 ATPs and 6 NADPH per 3 CO2 to make 6 G3P which could be used for glucose (C6H12O6)