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3 years ago

Does anyone know the answer to this chemistry question?!? How much HCl is made when 2g of hydrogen reacts? H2+Cl2->2HCl

Chemistry

1 answer:

KatRina [158]3 years ago

8 0

Answer:

146g

Explanation:

We're assuming the reaction is occurring with excess chloride. First convert hydrogen mass to moles using molar mass - you need to work with numbers for these sorts of questions:

n = m / MM

n = 2g / 1g/mol

n = 2mol

Now use your stoich ratio to find how many moles of HCL are produced. There are 2 moles of HCl produced for every 1 mole of H2 reacted so:

x HCl / 2 mol H2 = 2 HCl / 1 H2

x = 4mol HCl

Now convert this back into mass using the molar mass of HCl:

m = n x MM

m = 4mol x 36.5g/mol

m = 146g

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How many moles of CO2 are formed from 3.0 mol of C2H2

PilotLPTM [1.2K]

Answer:

50.0 moles C02

Explanation:

First write down the CORRECTLY balanced equation. NOTE: The equation you provide is incorrect.

2C2H2(g) + 5O2(g) ==> 4CO2(g) + 2H2O(g) CORRECT EQUATION

Next, look at the stoichiometric ratio of C2H2 to CO2. You can see it is 2 moles C2H2 produces 4 moles CO2.

Thus, 25.0 moles C2H2 x 4 moles CO2/2 moles C2H4 = 50.0 moles CO2

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3 years ago

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vladimir1956 [14]

Answer:

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3 years ago

What is the energy of the photons of a laser with a frequency of 5.75 x 10^12 Hz? (Hint: Remember to round your answer to the lo

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Answer:

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Explanation:

Given data:

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Energy of photon = ?

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3 years ago

Given that a 15.630 g milk chocolate bar contains 9.815 g of sugar, calculate the percentage of sugar present in 15.630 g of mil

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3 years ago

A balanced chemical equation contains the term "2Ba(OH)2⋅8H2O." How many atoms of each element does this represent in the molecu

PSYCHO15rus [73]

Answer:

$\begin{gathered} \text{Barium = }1.204\times10^{24}\text{ atoms} \\ \text{Oxygen = }1.204\times10^{25}\text{ atoms} \\ \text{Hydrogen = }2.1672\times10^{25}\text{ atoms} \end{gathered}$

Explanation:

Here, we want to know the number of atoms of each of the elements present in the given term

For the Barium, it is only affected by the external 2, so we have 2 Barium atoms only

For oxygen, we have a set in OH and another in H2O. For the OH own, we have 2 oxygen atoms and for the H2O , we have 8 atoms. That makes a total of 10, which when multiplied by the first 2 outside, gives 20

For Hydrogen, we have two sets, one with OH and the other with H2O

For the one with OH, we have 2 while for the one with H2O, we have 16. That makes a total of 18 which when multiplied by 2 gives a total of 36

Thus, we have each of the elements and their counts as follows:

Barium = 2

Oxygen = 20

Hydrogen = 36

Mathematically:

$1\text{ mole = 6.02 }\times10^{23}\text{ atoms}$

Thus:

$\begin{gathered} 2\text{ moles of Ba will contain} \\ 2\times\text{ 6.02 }\times10^{23}\text{ atoms = 1.204}\times10^{24}\text{ atoms} \\ \\ 20\text{ moles of oxygen will contain:} \\ 20\times\text{ 6.02}\times10^{23}\text{ atoms = 1.204}\times10^{25}\text{ atoms} \\ \\ 36\text{ moles of hydrogen will contain} \\ 36\times6.02\times10^{23}\text{ atoms = 2.1672}\times10^{25}\text{ atoms} \end{gathered}$

5 0

2 years ago