Answer:
pretty sure its B
Explanation:
Answer:
b :)
Explanation:
right on edge 2020
4.2 grams of magnesium metal reacts with excess gold III chloride to form 5.9 grams of gold and also magnesium chloride. What is the percent yield of gold?
Round your answer to two decimals
Answer:
???
Explanation:
Here, the actual yield of the reaction is given 5.9 gram. The theoretical yield obtained from the balanced equation is 23 g. Hence, the percent yield of gold is 25%.
What is percent yield?The percent yield of a product in a reaction is the ratio of its actual yield to the theoretical yield multiplied by 100. The theoretical yield is calculated from the balanced equation of the reaction.
The balanced equation for the given reaction is :
[tex]\rm 3 Mg + 2AuCl_{3} \rightarrow 2 Au + 3 MgCl_{2}[/tex]
The molar mass of Mg = 24 g/mol
mass of 3 moles of Mg = 72 g
mass of Au = 197.9 g/mol
mass of 2 moles of Au = 395.8 g
Hence, three moles or 72 g of Mg gives 395.8 g of Au. Thus, mass of Au that can be produced from 4.2 g of Mg is:
= (4.2 × 395.8)/72 = 23 g.
This is the theoretical yield of gold. Thus the percent yield can be calculated as follows:
percent yield = actual yield / theoretical yield × 100
= ( 5.9/23) × 100
= 25%.
Therefore, the percent yield of gold in this reaction is 25%.
To find more on percent yield, refer here:
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How does oil impact the environment?
Oil use produces pollution in the environment.
Oil produces more gases such as oxygen in the atmosphere.
Oil can help promote plant growth.
Oil help sustain ecosystems.
Answer:
the first oneeeee
Explanation:
this i because it impacts as in change
Given the reaction:
1C6H1206(s) + 602(g) → 6CO2(g) + 6H2O(1)
How many moles of C6H12O6(s) are needed to produce
24 moles of carbon dioxide (CO2)?
Answer:
4 moles
Explanation:
From the equation 1 mole of C6H1206 produces 6 moles of CO2.
Therefore the answer is 24/6 = 4 moles of C6H1206.
5. An example of a muscle that is voluntarily controlled is a muscle that
A. Makes the leg move.
B. Makes the heart pump.
C. Squeezes blood through vessels.
D. Squeezes food in the stomach.
Answer:
A, Makes the leg move
Explanation:
The location oon the surface of the Earth directly above the focus of an earthquake
is called the
A.focus point
B.seismic wave
C.epicenter
Answer:
I think its epicenter
Explanation:
The epicenter is the point on the earth's surface vertically above the hypocenter, point in the crust where a seismic rupture begins.
Which type of substance is soft, has a low melting point, and is a poor conductor of electricity
1.Covalent and the electrons and shared (2).Covalent and the electrons and transferred
(3).Ionic and the electrons are shared (4).Ionic and the electrons are transferred
Answer:
Covalent compounds have low forces of attraction between their molecules (i.e. one H2O molecule isn't as attracted to another H2O molecule than the oppositely charges ions are in an ionic compound). Little energy is needed to break their bonds, therefore they have low meting points. Hope this is what you are looking for!
Explanation:
Brainliest please?
How many moles are in 5.67 X 1025 molecules of FeS?
Answer:
9.42 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{5.67 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 9.418604...[/tex]
We have the final answer as
9.42 molesHope this helps you
Can anyone help me out with these questions? Thanks!!
10. Given 2.30 grams of Fe, how many moles of FeCl3, can be produced? 2 Fe + 3 Cl2 → 2 FeCl3 A. 0.04 moles
B. 0.08 moles
C.0.02 moles
D. 2.3 moles
Answer:
0.04 moles
Explanation:
Given data:
Mass of Fe = 2.30 g
Moles of FeCl₃ produced = ?
Solution:
Chemical equation:
2Fe + 3Cl₂ → 2FeCl₃
Number of moles Fe:
Number of moles = mass/molar mass
Number of moles = 2.30 g/ 55.85 g/mol
Number of moles = 0.04 mol
now we will compare the moles of iron and iron chloride.
Fe : FeCl₃
2 : 2
0.04 : 0.04
Thus, 0.04 moles of iron chloride are produced.
The number of moles that could be produced is 0.04 moles
The calculation is as follows:Chemical equation:
2Fe + 3Cl₂ → 2FeCl₃
Number of moles Fe:
It should be
[tex]= mass\div molar mass\\ = 2.30 g\div 55.85 g/mol [/tex]
= 0.04 mol
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which of the following is not a method of separating the components of mixture
A.) filtration
B.)decantation
C.)stiring
D.)evaporation
Answer:
stiring
Explanation:
Because in the process of stiring components mix together not separate.
hope u got it
If an ionic compound is made of Cl- and Fe2+,
the compound will be called Iron (___) chloride
Answer:
iron dichloride
which of the following shows correctly an ion pair and ionic compound the two ions from
Answer:
what are the choices?
Explanation:
Which of the following answers properly show the math for converting 50 ° F into Celcius?
Question 7 options:
(50 - 32) x (5/9)
(50 x 9/5) + 32
(50 - 32) x (9/5)
(50 x 5/9) + 32
50 - 273.15
50 + 273.15
Answer:
The first one
Explanation:
Electromagnetic Waves can propagate (move through);
Answer:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Explanation:
what element is this?
Answer:
hydrogen and helium is the answer
5. What is the pressure of a 5.0 L container which contains 3.0 moles of a gas at a temperature of 0°C?
Note: Use Ideal gas law. R=8.31 (kPax L/mol x K)
Answer:
P = 1361.17 KPa
Explanation:
Given data:
Mass of sample = 3.0 mol
Pressure of sample = ?
Volume of gas = 5.0 L
Temperature of gas = 0°C
Solution:
Pressure of gas:
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 8.31 KPa.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
0+273 = 273 K
by putting values,
P × 5.0 L = 3.0 mol × 8.31 KPa.L/ mol.K × 273 K
P = 6805.89 KPa.L/ 5.0 L
P = 1361.17 KPa
What is the nuclear charge of an atom of Silver?
A) +79
B) +47
C) +108
D) +61
Answer:
47 is your correct ans, which is b
Please help :,) I’m being timed
Answer:
B
Explanation:
How does geothermal energy differ from solar energy?
Geothermal energy is cooler and denser than solar energy.
Geothermal energy comes from the internal heat of Earth.
Geothermal energy is transmitted through the atmosphere.
Geothermal energy results from radiation of electromagnetic waves.
Answer:
Solar panels capture the sun's rays and convert it into heat and electricity, which is used to heat and cool your home, while geothermal solutions use the constant core temperature of the Earth to warm and cool a property.
Explanation:
Mark as brainliest
What is wrong with this graph? *
1 point
7
6-
2
0
Answer:
The Red?
Explanation:
This graph is missing a title
help me please lol....
Answer:
Explanation:
It the beginning levels, it stays the same. For example Be and Mg both have 2 valence electrons.
The bottle of hydrogen peroxide you used in Experiment 1: Ideal Gas Law - Finding Percent H2O2 is labeled as a 3% solution (the same as store-bought hydrogen peroxide). Do your experimental results support this (with consideration given to experimental error)
Answer:
0.33%
Explanation:
So, from the question it is given that the mass of the hydrogen peroxide in percentage is = 3% that is to say there are 3.0grams of hydrogen peroxide in 100mL of water. Therefore, the number of moles of hydrogen peroxide = 3/ molar mass = 3/ 34.02 = 0.088 moles.
Also, the mass of hydrogen peroxide = number of moles × molar mass = 0.088 × 34.02 = 2.99grams. Hence, the percentage by mass = [2.99/100 mL 0f water] × 100 = 2.99%
Therefore, the error in percentage = [ (3 - 2.99)/3 ]% × 100 = 0.33%
The percent error in the calculation has been 0.34%.
The moles of Hydrogen peroxide in 3% solution has been:
3% solution = 3 grams in 100 ml.
The molecular mass of hydrogen peroxide = 34.02 g/mol
The moles of hydrogen peroxide can be given as:
1 mole = 34.02 g/mol
3 g/100 ml = 0.088 mol.
The moles of hydrogen peroxide has been 0.088 mol.
Mass of hydrogen peroxide in 0.088 mol has been:
Mass = Moles × molecular mass
Mass of hydrogen peroxide = 0.088 × 34.02
Mass of hydrogen peroxide = 2.99 grams.
% of hydrogen peroxide = 2.99%.
The error in the calculation can be given as:
Error = [tex]\rm \dfrac{Bottle\;-\;Experimental}{Bottle}\;\times\;100[/tex]
Error = [tex]\rm \dfrac{3-2.99}{3}\;\times\;100[/tex]
Error = 0.34%.
The percent error in the calculation has been 0.34%.
For more information about the errors, refer to the link:
https://brainly.com/question/3105259
The SI unit for weight is the pound.
True or False
Answer:
t
Explanation:
Balanced or Unbalanced
CH4+4Ci2=CCi4+4HCi
Answer:
balanced
Explanation:
its balance since all the elments add up on both sides
Rachel is researching the differences that exist in each layer of the Earth. Which of the following best describes Earths crust?
1. Liquid, metallic
2. Dense, extremely hot
3. Semisolid, convective
4.Solid, rocky
HURRY I ONLY HAVE 5 MIN LEFT PLEASEEEEEE HELP I AM BEGGING YOUUUUUUUUUUUU
WHAT IS THE CONCENTRATION, IF A SOLUTION IS PREPARED BY DISSOLVING 90ML OF HYDROGEN PEROXIDE IN ENOUGH WATER TO MAKE 3000ML OF SOLUTION
Answer:
30%
Explanation:
Chemical concentrations are general defined as the ratio between amount of solute (Less amount compound, hydrogen peroxide) and amount of solvent or solution (More amount, water).
For example, volume/volume percentage -(V/V%)- is defined as 100 times the ratio between volume of solute (90mL of hydrogen peroxide) and volume of solution (300mL of solution), that is:
V/V% = 90mL / 300mL * 100 =
30%
effect of azeotrope system
Answer:
Explanation:
The effect of azeotrope system is that , a positive azeotrope system boils at lower temperature than the other liquid constituents. It is also refer to as minimum temperature.
A negative azeotrope system boils at high temperature than other liquid constituents.
A azeotrope mixure refer to mixture of liquid with constant boiling point.
Which of the following elements could replace copper in a single replacement reaction?
A. gold
B. lithium
C. sodium
D. lead
Which of the following is not the same as 13.6 milliliters?
Answer:
Need choices
Explanation:
Your question suggest that there are answers to choose from. Need those to complete the question.
Answer:
it is 0.0136 dkl
What is Scientific definition of a compound?
