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2 years ago

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TIMED TEST PLS HELP (will give BRAINLIEST) According to some scientists, which is a cause of global warming? PICK ONLY ONE A) de

crease of nitrous oxide B) increase in cloud cover C) decrease of methane gas D) increase in carbon dioxide

2 answers:

mash [69]2 years ago

8 0

The answer is C, hope you have a nice day and hope this helps

artcher [175]2 years ago

7 0

I think its c maybe im not sure

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A solution of H2SO4(aq) with a molal concentration of 4.80 m has a density of 1.249 g/mL. What is the molar concentration of thi

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Imagine we have <span>mass of solvent 1kg (1000g)
According to that: </span> $molality =n(solute) / m(solvent) =\ \textgreater \ 4.8m = 4.8mole / 1kg$
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$m(H2SO4) = n(H2SO4)*Mr(H2SO4) =\ \textgreater \$ $=\ \textgreater \ Molarity = 4.8 mole / 1.2 L = 4 M$ m(H2SO4) which is =<span>470g

</span><span>m(solution) = m(H2SO4) + m(solvent) = 470 + 1000 = 1470 g
d(solution) = m(solution) / V(solution) =>
=> 1.249 g/mL = 1470 g / V(solution) =></span>
$Molarity = n(solute) / V(solution) =\ \textgreater \$

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