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3 years ago

Using the average atomic mass, calculate the mass in grams of 143 iron atoms

Chemistry

1 answer:

melomori [17]3 years ago

7 0

Answer:

1326.6 × 10⁻²³g

Explanation:

Given data:

Number of atoms of iron = 143 atoms

Average atomic mass of iron = 55.845 amu

Mass of iron = ?

Solution:

It is known that,

55.845 g of iron = one mole of iron = 6.02× 10²³ atoms

For 143 atoms:

143 atoms /6.02× 10²³ atoms × 55.845 g

23.754 × 10⁻²³× 55.845 g

1326.6 × 10⁻²³g

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In Ray Bradbury's 1953 novel Fahrenheit 451, 451Â°F is said to be the temperature at which books, which have been banned in the

klio [65]

Answer : The temperature in degree Celsius is, $232.78^oC$

Explanation :

The conversion used for the temperature from Fahrenheit to degree Celsius is:

$^oC=(^oF-32)\times \frac{5}{9}$

where,

$^oF$ = temperature in Fahrenheit

$^oC$ = temperature in centigrade

As we are given the temperature in Fahrenheit is, 451

Now we have to determine the temperature in degree Celsius.

$^oC=(^oF-32)\times \frac{5}{9}$

$^oC=(451^oF-32)\times \frac{5}{9}$

$^oC=232.78$

Therefore, the temperature in degree Celsius is, $232.78^oC$

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3 years ago

In which biome would you most likely find plants that grow far apart from one another, with narrow leaves and shallow roots? Why

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Answer: Answer. A plant with narrow leaves and shallow roots would probably be found in the desert, where there is not a lot of water.

Explanation:

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3 years ago

Read 2 more answers

Equation: CH4 + 202 CO2 + 2H20

jeka94

Answer:

2:1

1.2 × 10² g

Explanation:

Step 1: Write the balanced combustion equation

CH₄ + 2 O₂ ⇒ CO₂ + 2 H₂O

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to CH₄ is 2:1.

Step 3: Calculate the moles of CH₄ required to react with 15 moles of O₂

We will use the previously established molar ratio.

15 mol O₂ 1 mol CH₄/2 mol O₂ = 7.5 mol CH₄

Step 4: Calculate the mass corresponding to 7.5 moles of CH₄

The molar mass of CH₄ is 16.04 g/mol.

7.5 mol × 16.04 g/mol = 1.2 × 10² g

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2 years ago

At 1023 K and 1 atm, a 3.00 gram sample of Snoz(s) (gram-formula mass = 151 g/mol) reacts with hydrogen gas to produce tin and w

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Answer:

2 moles of Sn are produced when 4 moles of H2(g) are consumed completely

Explanation:

to determine the number of moles of sn (l) produced when 4.0 moles of H2 (g) is consumed completely.

First, find the number of moles of H2 consumed by taking this as limiting reagent.

$n = \frac{g}{M.W (g/mol)}$

Then find the moles of Sn (l) taking into account the stoichiometric relationship between H2(g) and Sn(l). 2:1

$SnO_{2}$ (s) + 2 $H_{2}$ (g) ⇒ Sn(l) + 2 $H_{2}O$ (g)

$mol Sn(l) = \frac{1mol Sn}{2mol H_{2} } . 4 mol H_{2} = 2 mol$

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2 years ago

Where do an organisms genes come from?

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Answer:

Organisms genes come from both mother and father :3

Explanation:

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