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likoan [24]
4 years ago
13

Plz answerrrr I dunnoooo

Chemistry
2 answers:
Hitman42 [59]4 years ago
5 0
The correct answer is around noon as the sun is overhead so the shadow is shortest at this point
aleksley [76]4 years ago
3 0
Midnight is your answer.

plz mark as brainliest. i really need it ;-;.

Just ask if you need more help
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Which subatomic particles have a positive charge and are located in the nucleus?
d1i1m1o1n [39]

Answer: Atomic Particles

Explanation:

toms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

8 0
3 years ago
How many moles are 1.806 x 10^24 atoms?
djyliett [7]
2.999  is the amount of moles
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3 years ago
Condenation means what
Katen [24]

Answer: Heyaa! :)

Condensation is the process of water vapor turning back into liquid water!

Explanation:

Hopefully this helps you!

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7 0
2 years ago
How many moles are in 2.4g of carbon dioxide (CO2)?
miv72 [106K]

Answer:

\boxed {\boxed {\sf 0.055 \ mol \ CO_2}}

Explanation:

To convert form grams to moles, the molar mass must be used. This is the mass (in grams) in 1 mole of a substance.

We can use the values on the Periodic Table. First, find the molar masses of the individual elements: carbon and oxygen.

  • C: 12.011 g/mol
  • O: 15.999 g/mol

Check for subscripts. The subscript of 2 after O means there are 2 oxygen atoms, so we have to multiply oxygen's molar mass by 2 before adding.

  • O₂: 2* (15.999 g/mol)=31.998 g/mol
  • CO₂: 12.011 g/mol + 31.998 g/mol =40.009 g/mol

Use the molar mass as a ratio.

\frac {44.009 \ g\ CO_2}{ 1 \ mol \ CO_2}

Multiply by the given number of grams.

2.4 \ g \ CO_2 *\frac {44.009 \ g\ CO_2}{ 1 \ mol \ CO_2}

Flip the fraction so the grams of carbon dioxide cancel.

2.4 \ g \ CO_2 *\frac { 1 \ mol \ CO_2}{44.009 \ g\ CO_2}

2.4  *\frac { 1 \ mol \ CO_2}{44.009}

\frac { 2.4 \ mol \ CO_2}{44.009}= 0.0545342998 \ mol \ CO_2

The original measurement of grams has 2 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.

The ten thousandth place has a 5, so we round the 4 to a 5.

0.055 \ mol \ CO_2

2.4 grams of carbon dioxide is about 0.055 moles.

8 0
3 years ago
How many atoms of hydrogen-1 are in a 1.007-g sample?
Greeley [361]
I think it's 2 I tried looking it up because I was not sure.
8 0
3 years ago
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