Answer:
Because of the less reactivity of copper.
Explanation:
As well as being resistant to the elements and thereby less likely to be affected by rainfall, hail, and mildew than other types of roofing, copper is also one of the most fireproof materials available. Copper is also highly resistant to thermal changes and thereby doesn't deteriorate quickly.
Magnesium would also corrode PDQ. Magnesium sheeting would also pose an unacceptably high fire hazard.
After first half-life you will have 100/2=50g. After second half-life you will have 50/2=25g.
Answer
Noble Gases
Explanation: It is noble gases On the Website Ptable it will show you all the facts you need to know about each element
1. friction that’s all i know lol
1 mole of any gas under STP has volume 22.4 L.
Molar mass M(H2S) = 2M(H) + M(S)= 2*1.0 +32.1=34.1 g/mol
15g * 1mol/34.1g= 0.440 mol
0.440 mol*1L/22.4L= 9.85 L
<span> The volume of 15.0 grams of H2S at STP is 9.85 L.</span>
