The mass of an atom of one carbon atom is 12.011 u. What is the mass of 20 atoms of the same isotope?

Monjur Alahi

The mass of an atom of one carbon atom is 12.011 u. What is the mass of 20 atoms of the same isotope?


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

Mass of l atom of carbon = 12.011 u 

∴ Mass of 20 atoms of same carbon isotope = 20 × 12.011 u 

= 240.220 u

∴ The mass of 20 atoms of same carbon isotope = 240.220 u

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
A sample of 100 millicurie of krypton gas consists of a mixture of the active isotope `.^(85)Kr` & the stable isotope `.^(84)Kr`. If the volume of the

Correct Answer - [0.632 %]

2 Answers 1 views
A hydrogen atom moving at speed `v` collides with another hydrogen atom kept at rest .Find the minimum value of `v` for which one of the atoms may get

Correct Answer - `[7.2 xx 10^(4)m//s]`

2 Answers 2 views
The bond length between `sp^3` hybridised carbon atom and other carbon atom is minimum in

Correct Option is : (D) Propyne The C-C bond length = 1.54 Å  , C=C bond length = 1.34 Å and \(C \equiv C\) bond length = 1.20 Å . Since propyne has a triple bond , therefore...

2 Answers 3 views
(i) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk. (ii) If in a stick of chalk, carbon is 3g,

Correct Answer - (i) 12% (ii) 25g

2 Answers 1 views
A reaction in which an atom or a group of atoms in a compound is replaced by other atom or group of atoms is called ……………… reaction. 

Correct option is  C) substitution

2 Answers 1 views
a. Why is Carbon -14 radioactive while Carbon -12 not? (Atomic number of Carbon: 6) b. Researchers have uncovered the youngest known

(a) Ratio of neutrons to protons is 2.3: 1 which is not the stable ratio of 1:1 (b) Age of fossils can be estimated by C-14 decay. All living organisms have...

2 Answers 2 views
The number of times one atom of given element is heavier than 1/12th part of atomic mass of carbon – 12 is called as …………….. 

C) atomic mass

2 Answers 1 views
The combining capacity of atoms of an element with the atoms of other element is called its valency. Based on valency the odd one is 

Correct option is C) Helium

2 Answers 1 views
There are 3 isotopes of carbon. Carbon-12, Carbon-13 and Carbon-14. The most abundant carbon isotope is carbon – 12. 

Correct option is A) 12.01

2 Answers 1 views
Goitre – Isotope of iodine :: Cancer : …………….  A) Isotope of Uranium 

C) Isotope of Cobalt

2 Answers 1 views