Okay so, the molar mass (Mr) of O2 is 32g
moles = mass/Mr
moleS= 32.4/32= 1.0125mol
the Mr of KCl is 39.1+35.5= 74.6g
the ratio of moles of KCl to O2 is 2 : 3
therefore moles of KCl is (1.0125/3)×2= 0.675mols
mass =moles×Mr=0.675×74.6= 50.355g
rounds up to 50.3g therefore last answer is correct
B: a liquid becomes a gas Let me know if it’s right or wrong
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.
Answer:
Honestly makes no sense sorry :(
Explanation:
I can try though.. There are three types of selectivity possible for any synthesis: (i) Chemoselectivity is deciding which group reacts. (ii) Regioselectivity is where the reaction takes place in that group. (iii) Stereoselectivity is how the group reacts with respect to the stereochemistry of the product.
A stereospecific mechanism specifies the stereochemical outcome of a given reactant, whereas a stereoselective reaction selects products from those made available by the same, non-specific mechanism acting on a given reactant. Of stereoisomeric reactants, each behaves in its own specific way.
I tried to explain it the best I could.
Hopefully this helps you :)
Feel free to correct me If it was wrong
You will have to do some math.
<span>80.2 × 11.01 + 19.8 × x = 100 * 10.81. </span>
<span>x is the mass in amu of the second isotope. </span>
<span>Solve for x. </span>
<span>19.8 × x = 100 * 10.81 - 80.2 × 11.01 </span>
<span>19.8 × x = 1081 - 883.00 = 198.00 </span>
<span>x = 1964.00 / 19.8 = 10.00 </span>
<span>The mass of the other isotope is 10.00 amu.</span>