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Trava [24]
1 year ago
15

Solve the equation 2x^2 + 5x + 3 = 0 for x.

Mathematics
2 answers:
Bas_tet [7]1 year ago
8 0

Answer:

Step-by-step explanation:

2x^2+5x+3=0

2x3=6

3x2=6

3+2=5

2x^2+3x+2x+3=0

x(2x+3)+1(2x+3)

(x+1)(2x+3)

x+1=0         2x+3=0

x=-1            2x=-3

                  x=-3/2

dusya [7]1 year ago
4 0

Answer:X=1/2,−3

Step-by-step explanation:

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Mole Conversion:<br> What is the mass of 3.13 x 1023 molecules of carbon dioxide?
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Answer:

The mass of 3.13*10²³ molecules of carbon dioxide is 22.88 g.

Step-by-step explanation:

Avogadro's Number or Avogadro's Constant is the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and it applies to any substance.

Then you can apply the following rule of three: if 6.023*10²³ molecules are present in 1 mole, 3.13*10²³ molecules are present in how many moles?

moles=\frac{3.13*10^{23}molecules*1 mole }{6.023*10^{23}molecules}

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Since the molar mass of carbon dioxide is 44 g / mole, then the following rule of three can be applied: if there are 44 g in 1 mole, how much mass is there in 0.52 moles?

mass=\frac{0.52 moles*44 g}{1 mole}

mass= 22.88 g

<u><em>The mass of 3.13*10²³ molecules of carbon dioxide is 22.88 g.</em></u>

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