Which statements describe how stars are born? Check all that apply. Stars are born in clouds of gas and dust called nebulas.
The gas and dust are pulled together by gravity.
If the cloud that is pulled together has enough mass, a red giant is formed.
The pulled-together cloud collapses and becomes hot and dense,
Heat and pressure cause nuclear fusion, which signals the birth of a star.

ABDE

Explanation:

RIGHT ON EDGE

passing a magnet thought the

mixture , because iron gets attracted to magnet .

"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"