Answer:
The weight percent of NaBr is 25,7%
Explanation:
Molality is a way to express the concentration of a chemical in terms of moles of substances per kg of solution. Weight percent is other way to express concentration in terms of mass of substance per mass of solution per 100
Thus, to obtain weight percent you must convert moles of NaBr to grams with molar mass and these grams to kilograms, thus:
2,50 mol / kg solution × (102,9 g / 1mol) × (1 kg / 1000 g) =
× 100 = 25,7 % (w/w)
I hope it helps!
Answer:Check Box 1 and Box 3
Explanation: Formula 1 has (NO3)2 meaning it has 6 oxygen atoms (2x6) while formula 2 has CO3 with only 3 oxygen atoms.
Its essentially the same thing with box 3 with there being 8 hydrogen in formula 2 (NH4)2 and only 4 in formula 5 NH4 by itself
Yay good luck I hope it’s great for u ☺️
hey there:
H2CO3 = ( 1.0079 * 2 ) + ( 12.010*1 ) + ( 15.999 * 3 ) => 62.0228 g/mol
Hope this helps!
Answer:
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its violin, clarinet, french horn, tuba</h2>
Explanation:
just did the test:D can I get brainliest?