andraprepe46 andraprepe46

19-12-2020
Chemistry

contestada

Challenge: a sample of oxygen atoms contains 73% 0-18. 12% 0-19 and 15% O-21. What is the relative
77. How many
atomic mass of this sample ?

Respuesta :

arslanamir186 arslanamir186

19-12-2020

Answer:

18.57 is the relative mass

Explanation:

To find relative Atomic mass we need to multiply respective isotope percentage with its mass then add all mass× percentage and divided by 100

Solution

73×18+ 12×19 + 15×21 ÷ 100

1314+228+315÷100 = 1857÷100 = 18.57

Answer Link

Otras preguntas

Make a title about this short paragraph and write a statement that is your opinion about the paragraph

Post Falls High School in Idaho has 1160 students and is growing by 22 students per year. Richmond High School in Indiana has 1900 students and is shrinking by

ABC is a straight line. BD=BC Angle ADB=80° Angle BDC=20° Work out the size of the angle marked x. Give reason for your answer.

what are the chromosomes of an animal

What is the slope-intercept form of 11x-13y=39?

how should an instructor act in front of his recruits and cadets?

A person can only give blood to someone with compatible blood antigens. If a person receives blood from someone with an incompatible blood type, it can cause a

The vertices of quadrilateral ABCD are (-6,6),(3,6),(3,-6) and (-3,-3) Quadrilateral EFGH will be a dilation if quadrilateral ABCD with a scale factor of 1/3 At

help please i don’t know how to do it

Different________show very different characteristics or variations, however you can also have_______within the same species. A. Evolutionary animals, major diff