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4 years ago

Which of the following has the least number of identified substances?

1 answer:

Nookie1986 [14]4 years ago

8 0

Subatomic particles:
These are too small for people to really know much about them, scientists think that there are only about three: protons, neutrons, and electrons

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Numerator and denominator are Equal to one another? <br> I don’t get the concept

Alekssandra [29.7K]

It's like saying that if 1 meter is equal to 100 cm,

$\frac{100cm}{1m}$

$\frac{1m}{100cm}$

You can base the answers from the chart

5 0

3 years ago

What two dose the transfer of light energy require

IrinaK [193]

Answer:

Magnetic fields and Electric fields

Explanation:

3 0

3 years ago

g How many moles of NaOH are present in a sample if it is titrated to its equivalence point with 44.02 mL of 0.0885 M H2SO4? 2Na

Lisa [10]

Answer:

$n_{base}=3.90x10^{-3}molNaOH$

Explanation:

Hello!

In this case, since the sulfuric acid and sodium hydroxide react in a 1:2 mole ratio, given the reaction, we realize they have the following mole ratio at the equivalence point:

$2*n_{acid}=n_{base}$

Which in terms of concentrations and volumes is:

$2*M_{acid}V_{acid}=n_{base}$

Thus, we can plug in the volume and concentration of acid to find the moles of base:

$n_{base}=0.04402L*0.0885\frac{mol}{L} \\\\n_{base}=3.90x10^{-3}molNaOH$

Best regards!

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3 years ago

Butane, C4H10 burns in oxygen. How many grams of water vapor, H2O, are produced by the combustion of 580 grams of butane at stan

zepelin [54]

Answer:

The answer to your question is 900 g of water vapor

Explanation:

Data

mass of H₂O = ?

mass of butane = 580 g

Balanced chemical reaction

2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O

Process

1.- Calculate the molar weight of butane and water

Butane (C₄H₁₀) = 2[(12 x 4) + (1 x 10)]

= 2[48 + 10]

= 2[58]

= 116 g

Water (H₂O) = 10[(1 x 2) + (1 x 16)]

= 10[2 + 16]

= 10[18]

= 180 g

2.- Use proportions and cross multiplication to find the mass of water vapor

116 g of butane ------------- 180 g of water

580 g of butane ---------- x

x = (580 x 180) / 116

x = 900 g of water vapor

3 0

3 years ago

Is "Barrel of Slime" Toxic?

slava [35]

No Barrel of Slime Isn't toxic ( Smiles )

8 0

4 years ago

Read 2 more answers