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masha68 [24]
3 years ago
12

Start with 3 breads and 2cheese. how many products are made? and what are the leftovers?​

Chemistry
1 answer:
Trava [24]3 years ago
8 0
A pizza was made and 5 leftovers!
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A reaction produces 0.809 moles of h2o. how many molecules are produced?
PSYCHO15rus [73]
Use Avogadro's number which is numerically equal to ...

( 6.02 multiply by 10 to the power of negative 23) 


Avocado's number is the number of particle(molecules, ions, atoms)  present in one mole of substance.

number of molecule in 0.809 mole of h20 = ....

one mole of h20 contains (6.02* 10^-23)

0.809 mole contains....(6.02* 10^-23) (0.809)
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3 0
3 years ago
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A green laser pointer emits light with a wavelength of 536 nm. What is the frequency of this light?
anastassius [24]

Answer:

Your answer is 5.63 × 10^14 Hz

We know the value of the speed of light and we are given the wavelength. All we have to do is rearrange the equation to solve for the frequency:

frequency: v = c/ λ

Now just plug in the given values:

v = 3.00 × 10 ^ 8 / 530 × 10^-9

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3 0
3 years ago
A sample of helium gas has a pressure of 1.20 atm at 22.0 C. At what Celsius temperature will the helium reach a pressure of 2.0
Anarel [89]

Answer: 36.6°C

Explanation:

Given that,

initial pressure of helium (P1) = 1.20 atm

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Since pressure and temperature are given while volume is constant, apply the formula for pressure's law

P1/T1= P2/T2

1.20 atm / 22.0°C = 2.00 atm / T2

Cross multiply

1.20 atm•T2= 2.00 atm•22°C

1.20 atm•T2= 44 atm•°C

Divide both sides by 1.20 atm

1.20 atm•T2/1.20 atm = 44 atm•°C/1.20 atm

T2 = 36.6°C

8 0
4 years ago
3. A sample of carbon atoms were chemically combined with a sample of oxygen atoms to yield the
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Your mom is the answer

Explanation: moms tend to be the only formula to wake you up for school when no one can
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5 0
3 years ago
HELP PLZ !!! 15 points
Ulleksa [173]
Hi I’m here, what can I do to help
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3 years ago
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