arryfordancait arryfordancait

01-01-2016
Chemistry

contestada

The percent by mass of calcium in the compound calcium sulfate(CaSO4 ) is approximately
(1) 15% (3) 34%(2) 29% (4) 47%

Respuesta :

Billymkhoi Billymkhoi

01-01-2016

We already know that the molar mass of Ca is 40.08 g/mol, of S is 32.07 g/mol, of O is 16 g/mol.

(40.08 g/mol)/ (40.08 g/mol+ 32.07 g/mol+ 4* 16 g/mol)* 100%= 29.44%

The correct answer is (2) 29%.

Hope this helps~

Answer Link

Otras preguntas

every night Nathan has to read for at least 25 minutes write and inequality that shows how long Nathan can read each night

Which statement best describes a typical difference that could be found between the "Analysis" and "Conclusion" sections of a lab report?A) Only the "Conclusion

_______is the act of moving from one place to another. A. Locomotor B. Aerobic C. Stationary D. Static

Y=x+2 4x+3y= -36 system of equation

Azul has 4 green picks and no orange picks.You add orange picks so that there are 2 orange picks for every 1 green pick.How many picks are there now.

What’s a definition for a polygon inscribed in a sphere ?

You picked the corridor which led you here. If the guards find you, they're going to be really ANGRY! What is the synonym of ANGRY

PLEASE HELP question in picture

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)>0

Betty correctly answers 30 questions on your math test there are 40 questions on the test what percent of the questions did she answered incorrectly