Question

Chemist
in grams of 엉
mass
2
What is the
;) 6.022x102 atome of orcygen
;;) 1.0x10² moleculer of H2S​

Answer 1

Answer:

1)mass of 6.022*10²³ atoms of oxygen=

1mole = 6.022*10²³ atoms

No. of moles = given mass/gram atomic mass

1 = x/16g

1×16g = x = given mass

therefore 1mole or 6.022*10²³ atoms of oxygen = 16g

2) mass of 1×10²³ atoms of Hydrogen Sulphide

1 mole = 6.022*10²³ atoms or molecules

= ?= 1.0 × 10²³ molecules

? = 1/6.022 × 10²³/10²³ moles

?= 0.16moles

No. of moles = given mass/molecular mass

1.6moles = x/34g

1.6×34g=x=given mass

54.4g = given mass

therefore 1.0×10²³ molecules of H2S = 54.4g