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3 years ago

How many grams are in 2 moles of H₂O?

Chemistry

1 answer:

Lynna [10]3 years ago

7 0

<em>Question:</em>

<h2>How many grams are in 2 moles of H₂O?</h2><h2 />

<u><em>Answer:</em></u>

<h3>One mole of H2O has a mass of (2*1 + 1*16 = 18g). We read the 1 and the 16 from the periodic table of the elements under “atomic weight” or “atomic mass”. I’ve taken the whole numbers from memory to keep it simple but you can read a more accurate value if you need a more accurate value from your periodic table. </h3><h3 /><h3>So if one mole of H2O has a mass of 18g, then 2 moles will have a mass of 18*2 = 36g.</h3><h3 />

<em>Note: * I am not responsible if you get it wrong, for you are the one who asked the question. *</em>

<u>If this helped, your welcome! Please know that I might be wrong, and if I am, I am truly sorry for that. But If you would, please make me brainliest.</u>

I hope you have a rest of your great day! If there is an issue with this question, be happy to comment. <3

<u><em>-niaxfandoms (insta and yt)</em></u>

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Give the Unabbreviated electron configuration for barium

Shalnov [3]

Answer:

Ba: 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰5p⁶ 6s²

Step-by-step explanation:

Step 1. Locate barium in the Periodic Table.

It's in Period 6, Group 2: Element 56 (highlighted blue in the Periodic Table below).

Step 2. Add 54 electrons to the energy levels

You add then in the order shown in the diagram below.

The complete electron configuration is:

Ba: 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d¹⁰4p⁶ 5s²4d¹⁰5p⁶ 6s²

n = 2 + 8 + 8 + 18 + 18 + 2 = 56

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4 years ago

What is a distinguishing feature about ionic bonds?

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Answer:

Here:

Explanation:

So ionic bonds are formed due to electrostatic attraction. For example, in NaCl, Na gives an electron to Cl, getting Na+ and Cl- where + and - charges attract and form an ionic bond.

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4 years ago

Can a electron be found in an exact spot within a atom

goldenfox [79]

Answer:

Electrons are located in an electron cloud, which is the area surrounding the nucleus of the atom. There is usually a higher probability of finding an electron closer to to the nucleus of an atom.

Explanation:

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4 years ago

9. Given the following reaction:CO (g) + 2 H2(g) CH3OH (g)In an experiment, 0.45 mol of CO and 0.57 mol of H2 were placed in a 1

WITCHER [35]

Answer:

$Keq=11.5$

Explanation:

Hello,

In this case, for the given reaction at equilibrium:

$CO (g) + 2 H_2(g) \rightleftharpoons CH_3OH (g)$

We can write the law of mass action as:

$Keq=\frac{[CH_3OH]}{[CO][H_2]^2}$

That in terms of the change $x$ due to the reaction extent we can write:

$Keq=\frac{x}{([CO]_0-x)([H_2]_0-2x)^2}$

Nevertheless, for the carbon monoxide, we can directly compute $x$ as shown below:

$[CO]_0=\frac{0.45mol}{1.00L}=0.45M\\$

$[H_2]_0=\frac{0.57mol}{1.00L}=0.57M\\$

$[CO]_{eq}=\frac{0.28mol}{1.00L}=0.28M\\$

$x=[CO]_0-[CO]_{eq}=0.45M-0.28M=0.17M$

Finally, we can compute the equilibrium constant:

$Keq=\frac{0.17M}{(0.45M-0.17M)(0.57M-2*0.17M)^2}\\\\Keq=11.5$

Best regards.

3 0

4 years ago

Which of the following solutions contains the greatest number of ions?

Elden [556K]

Answer : The correct option is, (A) 300.0 mL of 0.10 M CaCl₂

Explanation :

The dissociation reaction will be:

$CaCl_2(aq)\rightarrow Ca^{2+}(aq)+2Cl^-(aq)$

To calculate the number of moles of CaCl₂ as :

$\text{Moles of }CaCl_2=\text{Concentration of }CaCl_2\times \text{Volume of solution in L}$

$\text{Moles of }CaCl_2=0.10M\times 0.3L=0.03mol$

As, 1 mole of CaCl₂ contains ions = 3

So, 0.03 mole of CaCl₂ contains ions = 0.03 × 3 = 0.09 ions.

The dissociation reaction will be:

$NaCl(aq)\rightarrow Na^{+}(aq)+Cl^-(aq)$

To calculate the number of moles of NaCl as :

$\text{Moles of }NaCl=\text{Concentration of }NaCl\times \text{Volume of solution in L}$

$\text{Moles of }NaCl=0.10M\times 0.4L=0.04mol$

As, 1 mole of NaCl contains ions = 2

So, 0.04 mole of NaCl contains ions = 0.04 × 2 = 0.08 ions.

The dissociation reaction will be:

$FeCl_3(aq)\rightarrow Fe^{3+}(aq)+3Cl^-(aq)$

To calculate the number of moles of FeCl₃ as :

$\text{Moles of }FeCl_3=\text{Concentration of }FeCl_3\times \text{Volume of solution in L}$

$\text{Moles of }FeCl_3=0.10M\times 0.2L=0.02mol$

As, 1 mole of FeCl₃ contains ions = 4

So, 0.02 mole of FeCl₃ contains ions = 0.02 × 4 = 0.08 ions.

<u>(d) 800.0 mL of 0.10 M sucrose</u>

The dissociation of sucrose is not possible because it is a non-electrolyte.

To calculate the number of moles of sucrose as :

$\text{Moles of }sucrose=\text{Concentration of }sucrose\times \text{Volume of solution in L}$

$\text{Moles of }sucrose=0.10M\times 0.8L=0.08mol$

As, 1 mole of sucrose contains ions = 1

So, 0.08 mole of sucrose contains ions = 0.08 × 1 = 0.08 ions.

Hence, the solutions contains the greatest number of ions is, 300.0 mL of 0.10 M CaCl₂

3 0

3 years ago