1
An atom with 17 protons, 17 electrons and 18 neutrons has a mass number
of ​

Explanation:

Mass number= 35 amu

35

Explanation:

mass number = protons in the nucleus + neutrons in the nucleus

17 + 18 = 35, the mass number

Protons and neutrons are together known as nucleons.

I would appreciate Brainliest, but no worries.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

gold is my favorite solid.