CHEMISTRY HIGH SCHOOL

What is the % yield of CO2 if 10g of CO produces 12.8 g CO2?
2CO + O2 → 2CO2

Answers

Answer 1
Answer: Moles CO = 10.0 g / 28.01 g/mol = 0.357 
the ratio between CO and CO2 is 2 : 2 ( or 1 : 1) so we would get 0.357 mole of CO2 ( 100% yield) 

mass CO2 = 0.357 mol x 44.0098 g/mol = 15.7 g ( theoretical yield) 

% yield = 12.8 x 100 / 15.7 = 81.5

Hope this helps.
Answer 2
Answer: The % yield is 81.5 :DDDDDD

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Which statement best explains the change that occurs when gas particles move more slowly

Answers

Answer:

Condensation/Sublimation

Explanation:

When gas particles move more slowly they're losing energy, which means it's changing state to either a solid or liquid.

Answer:

C) The temperature decreases because the average kinetic energy decreases.

Explanation:

EDGE 2022

How many milliliters of 0.183 m hcl would be required to titrate 5.93 g koh?

Answers

  Molar mass:
KOH = 56.0 g/mol

Number of moles of KOH :

5.93  / 36.5 => 0.1624 moles

KOH + HCl = KCl + H₂O 

1 mole KOH --------------> 1 mole  HCl
0.1624 moles KOH ----> ?

moles HCl = 0.1624 x 1 / 1

= 0.1624 moles of HCl

V ( HCl ) = moles / molarity

V(HCl) = 0.1624 / 0.183

V (HCl) = 0.887 L x 1000 = 887 mL

hope this helps!

What does command mean

Answers

Answer:

TechnologyCommand Data Solutions specializes in empowering your data and content with a high degree of quality and scope. Intelligent data fine-tunes your advertising, and enables your core sales team to work within relevant market zones. This saves a lot of valuable time and increases ROI.

Explanation:

Answer:

Technology Command Data Solutions specializes in empowering your data and content with a high degree of quality and scope. Intelligent data fine-tunes your advertising, and enables your core sales team to work within relevant market zones. This saves a lot of valuable time and increases ROI. We do this with a multi-faceted approach using cutting edge technologies. We also market your content through various channels such as telemarketing and e-mail campaigns, as well as syndication. We further engage your customers through blogs, webinars and webcasts. We closely study your customers’ requirements and arrange meetings when the time is right. This ground work frees up your sales force to focus on its strength: hard core sales. We cleanse your existing database and remove irrelevant data. We enrich it with new, more relevant contact information. We monitor your existing and potential customer profiles and track their technology needs. The moment we sense purchase behavior, you get an instant update.

An Arrhenius base yields which ion as the only negative ion in an aqueous solution

Answers

The answer is most likely hydroxide.

Given the equation: 2Na + 2H2O → 2NaOH + H2 Which substance in this equation is a binary compound?

Answers

Answer: In the following equation, H_2O is considered as a binary compound.

Explanation: A binary compound is considered as a compound having 2 elements only. In the following chemical equation:

2Na+2H_2O\rightarrow 2NaOH+H_2

There are 2 compounds present because compound is defined as the chemical combination of two or more elements in a fixed ratio.

In the equation, compounds are: H_2O and NaOH

H_2O consists of 2 elements which are hydrogen and oxygen and hence is considered as a binary compound.

NaOH consists of 3 elements which are sodium, hydrogen and oxygen and hence, cannot be considered as a binary compound.

How many moles of atoms are in 2.00 g of 13c?

Answers

There are 0.154 moles of atoms in 2.00 g of carbon-13.

Further Explanation:

Moles, Atomic mass and Molecular mass  

  • 1 mole of a pure substance contains a mass that is equal to the relative atomic mass or molecular mass of the substance.
  • Therefore; molar mass is given as grams per mole of a substance  

Hence;

Molar mass = mass of a substance/ Number of moles  

     g/mol = g /mole  

Thus;

  • M = m/n; where M is the molar mass, m is the mass and n is the number of moles
  • From this relationship we can therefore, calculate mass by multiplying the number of moles by molar mass of a substance.

That is; Mass = moles x molar mass  

  • To calculate number of moles;

We have; n = m/M

Number of moles = Mass of the substance/ Molar mass

  • In our case;

Mass = 2 g of Carbon-13  

Molar mass = 13.0 g/mol  

Since; Number of moles = Mass/ molar mass

Thus;

Moles = (2.0 g)/ (13.0 g/mol)

          = 0.154 moles  

Keywords: Moles, Molecular mass, relative atomic mass  

Learn more about:

Level: High school  

Subject: Chemistry  

Topic: Moles  

Sub-topic: Moles, molecular mass and mass of a pure substance.

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