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2 years ago

The diameter of an atom is approximately 1 × 10-10 m. What is the diameter in picometers?

Chemistry

1 answer:

masha68 [24]2 years ago

3 0

Answer : The diameter in picometer is, $1\times 10^{2}pm$

Explanation :

As we are given that the diameter of an atom is $1\times 10^{-10}m$ . Now we have to convert it into picometers.

Conversion used from meter to picometer is:

$1m=1\times 10^{12}pm$

As, $1m=1\times 10^{12}pm$

So, $1\times 10^{-10}m=\frac{1\times 10^{-10}m}{1m}\times 1\times 10^{12}pm$

$1\times 10^{-10}m=1\times 10^{2}pm$

Thus, the diameter in picometer is, $1\times 10^{2}pm$

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Answer:

5.5moles

Explanation:

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From the equation, the following were observed:

1mole of CaC2 reacted to produced 1mol of C2H2.

Therefore, 5.5moles of CaC2 will also produce 5.5moles of C2H2

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2 years ago

A student wants to reclaim the iron from an 18.0-gram sample of iron(III) oxide, which

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Answer:

$m_{Fe}=12.6gFe$

Explanation:

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In this case, since we have grams of iron (III) oxide whose molar mass is 159.69 g/mol are able to compute the produced grams of iron by using its atomic mass that is 55.845 g/mol and their 2:4 molar ratio in the chemical reaction:

$m_{Fe}=18.0gFe_2O_3*\frac{1molFe_2O_3}{159.69gFe_2O_3}*\frac{4molFe_2O_3}{2molFe_2O_3} *\frac{55.845gFe}{1molFe_2O_3} \\\\m_{Fe}=12.6gFe$

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2 years ago

Read 2 more answers

In the adjoining figure, the circles with the + sign represent protons and the empty circles represent neutrons. Determine which

Natali [406]

Answer: option C. 2 and 3.

Explanation:

1) Isotopes are atoms of a same element with different number of neutrons. That means that the isotopes of a same element have the same number of protons, since the number of protons is what identify an element.

2) For example, all the atoms of oxygen have 8 protons. But isotope oxygen-16 has 8 neutrons, while oxygen-18 has 10 neutrons.

3) In the figure there are 3 different atoms:

i) atom # 1 has 5 protons and 7 neutrons

ii) atom # 2 has 6 protons and 7 neutrons

iii) atom # 3 has 6 protons and 8 neutrons.

4) Hence the atoms with the same number of protons and different number of neutrons are the #2 and the # 3. So, they are the isotopes of the same element.

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2 years ago

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Danny sails a boat downstream. The wind pushes the boat along at 21 km/hr. The current runs downstream at 15 km/hr. What is the

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Answer: D) 36.0 km/hr, downstream

Explanation:

For downstream motion of the boat, the actual velocity of the boat is the sum of velocity of the water current and the velocity of the boat due to pushed by wind.

Velocity of water current, v = 15 km/h

Velocity of the boat going downstream, u = 21 km/h

Actual velocity of the boat = v'

v' = v + u

⇒v' = 15 km/h + 21 km/h

⇒u = 21 km/h +15 km/h = 36.0 km/h downstream

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2 years ago

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A 100.0mL bubble of hot gases at 225 C and 1.80 atm escapes from an active volcano, what is the new volume of the bubble outside

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<h3>Answer:</h3>

112.08 mL

<h3>Explanation:</h3>

From the question we are given;

Initial volume, V1 = 100.0 mL
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thus, T1 = 498.15 K

Initial pressure, P1 = 1.80 atm
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= 248.15 K

Final pressure, P2 = 0.80 atm

We are required to calculate the new volume of the gases;

According to the combined gas law equation;

$\frac{P1V1}{T1}=\frac{P2V2}{T2}$

Rearranging the formula;

$V2=\frac{P1V1T2}{T1P2}$

Therefore;

$V2=\frac{(1.80atm)(100mL)(248.15K)}{(498.15K)(0.80atm)}$

$V2=112.08mL$

Therefore, the new volume of the gas is 112.08 mL

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2 years ago