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Effectus [21]
3 years ago
6

3. Calculate the mass in grams of 2.75 moles of Copper.

Chemistry
1 answer:
hichkok12 [17]3 years ago
3 0

Answer: 174.6g

Explanation:

Number of Moles= mass/molar mass

Therefore mass= Number of moles x molar mass

Molar mass of copper= 63.5g/mol

Number of moles= 2.75mol

Mass= 63.5 x 2.75

Mass=174.6g

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What is the role of gluons?
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The role of the gluons is to bind together the quarks that make up protons and neutrons. That is option D.

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8 0
2 years ago
When 12 moles of o2 react with 1.1 mole of c10h8 what is the limiting reactant?
Trava [24]
1.1   moles   of C10H8  is the  limiting  reagent  in   the  reaction between   reaction  C10H8   and   O2
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C10H8  +  12O2  ---->  10CO2   + 4H2O

C10H8  is  the  limiting   reagent   since   1.1  moles  of  C10H8  is  totally   consumed   during  the  reaction
6 0
3 years ago
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Iodine-131 half life 8.040 how long will it take for a 40 gram sample of iodine-131 to decay to 0.75 grams
otez555 [7]

Answer:

See explanation below

Explanation:

To get this, we need to apply the general expression for half life decay:

N = N₀e(-λt)    (1)

Where:

N and N₀ would be the final and innitial quantities, in this case, masses.

t: time required to decay

λ: factor related to half life

From the above expression we need λ and t. To get λ we use the following expression:

λ = t₁₂/ln2   (2)

And we have the value of half life, so, replacing we have:

λ = 8.04 / ln2 = 11.6

Now, we can replace in (1) and then, solve for t:

0.75 = 40 exp(-11.6t)

0.75 / 40 = exp(-11.6t)

ln(0.01875) = -11.6t

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t = -3.9766 / -11.6

<h2>t = 0.34 days</h2><h2></h2>
3 0
3 years ago
16. Predict how the wavelength and frequency of a wave would change if the amount of energy it carried was increased.
pishuonlain [190]

Answer:

1.- The energy of a wave will increase the frequency due to the increase in the speed of the wave.

2.- The wavelength will increase if the energy of the wave increases, due to the area that is expand.

3.- A wave with a higher frequency will have faster speed to move.

Explanation:

Wavelength of a wave is due to the speed and the energy that the wavelength carry, so if the energy increases, this quantity of energy need to distribute or in the wavelength or in the frequency, to conduct the wave with a bigger amount of energy.

5 0
3 years ago
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