What is 4.7 rounded to the nearest tenth

The answer is still 4.7

Explanation:

The first digit before a decimal (to the left) is called unit or one. However, the first digit after a decimal (to the right) is called tenth, and the one after that is called hundredth.

when rounding up, any digit greater than 4 will be rounded up to 1 and then added to the preceding number. But when the digit is less than 5, the number is rounded off to 0.

Hence, 4.7 is the same as 4.70 with the "7" being the tenth value and the "0" being the hundredth value. Hence, when 4.7 is rounded to the nearest tenth, it remains as 4.7 because its hundredth value is rounded off to "0" since it is less than "5".

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.