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

Trevor examines some water from the open ocean and finds that it contains several single-celled and multi-celled organisms. What term should Trevor use to descr

Describe opportunities for someone wishing to become an active citizen at the local level.

How many total atoms are in 0.530 g of P2O5/12131141/dc2696ff?utm_source=registration

A man walking down the street appears to have an illegal weapon. What can a police officer do?

What are some benefits of paying taxes? Check all that apply. 1) Taxes ensure that the needs of the nation are fulfilled. 2) Taxes pay for public works such a

Please I need help!!!!!!!

Which of the following is not a perfect square? A) 49 B) 121 C) 75 D) 64

“When using a public computer for browsing the Internet, try to use for________ transactions. Also, use__________ browsing whenever you can.” FILL IN THE BLANK

The SHAPE of your CO2 car resembles which aerodynamic technologies?

Read the following excerpts from two speeches given by Franklin D. Roosevelt at the onset of America's entrance into World War II in 1941. The first speech was