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Dvinal [7]
3 years ago
9

How would the number of atoms in a 2.02g sample of hydrogen compare to the number of atoms in a 32.00g sample of oxygen

Chemistry
1 answer:
9966 [12]3 years ago
4 0

Answer:

Number of atoms is equal.

Explanation:

1 mol of anything contains NA particles.

NA is known as Avogadro's number, 6.02×10²³

We determined the moles of each compound. Both molecules are dyatomic,

H₂  → 2.02 g . 1mol / 2.016 g = 1 mol

O₂ →  32 g . 1mol / 32g = 1 mol

Both have the same amount of moles.

In conclussion, the number of atoms is the same in both samples.

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About one kilogram of coffee beans is required 
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3 years ago
An aluminum engine block requires 8669 kJ of energy for the temperature to rise from 75.0 °F to 195 °F. The specific heat of lea
quester [9]

Answer:

The answer to your question is 144 kg

Explanation:

Data

Q = 8669 kJ

T1 = 75°F

T2 = 195°F

Cp = 0.897 J/(g°C)

m = ?

Formula

           Q = mCp(T2 - T1)

Process

1.- Convert temperature to °C

T1 = (75 - 32) / 1.8

   = 43/1.8

   = 23.9°C

T2 = (195 - 32) / 1.8

     = 163/1.8

     = 90.6°C

2.- Solve for m

            m = Q / Cp(T2 - T1)

3.- Substitution

            m = 8669000 / 0.897(90.6 - 23.9)

4.- Simplification

            m = 8669000 / 59.83

5.- Result

            m = 144893.66 g or 144.9 kg

6 0
3 years ago
The largest contributed to water pollution is
Lina20 [59]

Answer:

this si from google hope it helps

Explanation:

The Main Causes of Water Pollution in the U.S.

Runoff from Agricultural Operations. Agriculture represents one of the biggest sources of water pollution in the country. ...

Runoff and Nonpoint Source Pollution. ...

Industrial Activities. ...

Leakage from Underground Storage and Piping. ...

Leaking Sewers. ...

Vehicle Emissions. ...

Landfill Leakage. ...

Hazardous Waste.

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4 years ago
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Why can you dissolve more salt in hot water
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Answer:

<em></em>

<em> Hi mate, here is ur answer:</em>

<em />

<em>You can </em><em>dissolve</em><em> more </em><em>salt</em><em> in </em><em>hot water</em><em> because in hot water, </em><em>molecules </em><em>move faster than </em><em>cold water</em><em> because of the </em><em>higher energy</em><em>, as a result the molecules of hot water move fast and </em><em>settles down</em><em>. As they settle fast, it is easy for higher amount of salt to dissolve in hot water. </em>

<em>HOPE THIS HELPS U</em>

<em>:) WISHING U A GREAT DAY AHEAD </em>

8 0
4 years ago
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What is the atomic number for an element with 6 neutrons and a mass number of 10
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\bold{\huge{\blue{\underline{Answer}}}}

\bold{\underline{ Given :- }}

  • Atomic number of an element with 6 neutrons and a mass number of 10

\bold{\underline{ Let's \:Begin}}

\sf{We\: know\: that, }

  • Atomic number is the number of protons in the nucleus of an atom

\sf{Whereas ,}

  • Mass number is the sum of protons and neutrons in the nucleus of an atom.

\sf{We\: have \:number \:of \:neutrons = 6 }

\sf{ Mass\: number = 10 }

\bold{\underline{Therefore}}

\sf{ Mass\: number = Protons + neutrons}

\sf{ 10 = Protons + 6 }

\sf{ Protons = 10 - 6}

\sf{ Protons = 4 }

\sf{ Thus, \: the \: number \: of \: protons \: is \:4}

\bold{\underline{ Therefore,\:we\:know\:that, }}

\sf{ No\: of\: protons = Atomic \:number }

\sf{ 4 = Atomic \:number }

\sf { Hence,  \:atomic\: number\: of\: the\: element\: is\: 4}

5 0
2 years ago
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