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Schach [20]
3 years ago
15

An object with a density of 3.7kg/m^3 has a mass of 2.5g. What's the volume in mL?

Chemistry
1 answer:
valentinak56 [21]3 years ago
5 0
d=3,7\frac{kg}{m^{3}}=3,7\frac{1000g}{1000000mL}=0,0037\frac{g}{mL}\\
m=2,5g\\\\
d=\frac{m}{V} \ \ |*V\\
dV=m \ \ |:d\\
V=\frac{m}{d}=\frac{2,5g}{0,0037\frac{g}{mL}}\approx 675,68mL
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The oxidation state of phosphorus is +3 in
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Answer:

b) Phosphorus acid

Explanation:

To distinguish the type of acid of phosphorus with the oxidation state of +3, we need to be familiar with the chemical formula of each of the compounds:

    Orthophosphoric acid             H₃PO₄

    Phosphorus acid                       H₃PO₃

    Metaphosphoric acid               HPO₃

    Phyrophosphoric acid​               H₄P₂O₇

Now that we know the formula of the given compounds, the algebraic sum of all the oxidation numbers of all atoms in a neutral compound is zero:

Only phosphorus acid yielded an oxidation state of +3 for phosphorus in the compound.

  H₃PO₃:

   we know the oxidation state of H = +1

                                                          O = -2

         The oxidation state of P is unknown. We can express this as an equation:

                3(+1) + P + 3(-2) = 0

                    3 + P -6 = 0

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6 0
2 years ago
what would the molarity of a solution be if you took 10 mL of a 13M stock solution and made a 300 mL solution?
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Answer:

0.43M

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The final electron acceptor of the electron transport chain that functions in aerobic oxidative phosphorylation is The final ele
MissTica

Answer:

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2 years ago
calculate the heat required in joules to convert 18.0 grams of water ice at a temperature of -20 c to liquid water at the normal
KIM [24]

Answer:

Explanation:

Heat required to convert ice to ice at 0⁰C

= mass x specific heat x rise in temperature

= 18 x 2.09 x 20

= 752.4 J .

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Total heat required

7560 + 6048 + 752.4

= 14360.4 J

7 0
2 years ago
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