One atom of an element x weighs 6.643

Asked by admin @ 29/08/2021 in Chemistry viewed by 290 People

One atoms of an element x weigh 6.64310 -23 g. Number of moles in 20 kg is :

Answered by admin @ 29/08/2021

The mass of one mole of the atoms is equal to 6.023 x 6.643
Therefore no. Of moles in 20000 g= 20000/6.023x 6.643 = 499.8.

In the atom of an element x 6 electrons

Asked by admin @ 20/08/2021 in Chemistry viewed by 352 persons

In the atom of an element x , 6 electrons are present in the outermost shell . If it acquires noble gas confriguration by accepting requisite number of electrons , …

The atomic number of an element x is 19

Asked by admin @ 17/08/2021 in CBSE BOARD X viewed by 322 persons

The atomic number of an element ‘X’ is 19. (a) Write its electronic configuration. (b) To which period of the Modern Periodic Table does it belong and what is its …

How do atoms of different elements differ from one another

Asked by admin @ 04/08/2021 in Chemistry viewed by 303 persons

Why do atoms of different elements differ from each other in Mass and properties

Two elements x atomic weight 75 and y

Asked by admin @ 29/08/2021 in Science viewed by 437 persons

Two elements X (Atomic mass 75) and Y (Atomic mass 16) combine to give a compound having 75.8% X. The formula of the compound is

If one mole of carbon atoms weighs 12 grams

Asked by admin @ 11/08/2021 in Science viewed by 381 persons

If one mole of carbon atoms weighs 12 grams,what is the mass(in grams)of 1 atom of carbon?

Which function has only one x-intercept at (−6, 0)?

Asked by maham237 @ 25/12/2020 in Mathematics viewed by 339 persons

f(x) = x(x − 6) f(x) = (x − 6)(x − 6) f(x) = (x 6)(x − 6) f(x) = (x 6)(x 6)

For which value of m does the graph of y = 18x2 + mx + 2 have exactly one x-intercept?

Asked by maham237 @ 17/12/2020 in Mathematics viewed by 380 persons

An element's atomic number is equal to its number of

Asked by admin @ 02/12/2021 in Chemistry viewed by 323 persons

The atomic number of an element is equal to the number of _____ contained in one atom of that element. protons neutrons electrons protons and neutrons The atomic number of …

How to find how many atoms are in an element

Asked by admin @ 29/10/2021 in Chemistry viewed by 391 persons

Which number in a chemical formula tells you how many atoms of element you have

How do you find the atomic mass of an element

Asked by admin @ 28/10/2021 in Biology viewed by 318 persons

What does the atomic mass of an element represent? A) The total number of its protons and electrons. B) The average total mass of its neutrons, protons, and electrons. C) …

Atoms of elements in the same group have the same

Asked by admin @ 09/10/2021 in Physics viewed by 369 persons

Atoms of elements in the same group have the same number of [Blank] This is why they have similar chemical properties. A.Protons B.neutrons C.Valence electrons