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PPE 15. What variables are you manipulating in this exercise? Identify a symbol to represent each variable.
Fe2O3 (s) + CO (g) -> Fe(s) + CO2 (g) (unbalanced)
1.Calculate the number of grams of CO that can react with 0.150kg of Fe2O3
2. Calculate the number of grams of Fe and the number of grams of CO2 formed
when 0.150 kg of Fe2O3 reacts
Answer:
1. 78.9g of CO
2. 104.9g Fe and 124.0g CO2
Explanation:
Based on the balanced reaction:
Fe2O3 (s) + 3CO (g) -> 2Fe(s) + 3CO2 (g)
1 mole of Fe2O3 reacts with 3 moles of CO to produce 2 moles of Fe and 3 of CO2
1. The moles of 0.150kg = 150g of Fe2O3 -Molar mass: are:
150g * (1mol / 159.69g) = 0.9393 moles Fe2O3
Moles CO:
0.9393 moles Fe2O3 * (3mol CO / 1mol Fe2O3) = 2.818 moles CO
Mass CO -Molar mass: 28.01g/mol-:
2.818 moles CO * (28.01g/mol) = 78.9g of CO
2. The moles of Fe produced are:
0.9393 moles Fe2O3 * (2mol Fe / 1mol Fe2O3) = 1.8786 moles Fe
Mass Fe -Molar mass: 55.845g/mol-:
1.8786 moles Fe * (55.845g/mol) = 104.9g Fe
The moles of CO2 produced are:
0.9393 moles Fe2O3 * (3mol CO2 / 1mol Fe2O3) = 2.818moles CO2
Mass CO2 -Molar mass: 44.01g/mol-:
2.818moles CO2 * (44.01g/mol) = 124.0g CO2
Which element has their valence electron farthest from the nucleus?
K (Potassium)
Li (Lithium)
Na (Sodium)
Rb (Rubidium)
The theoretical yield of NH3 is 945 grams. You conducted the experiment and only produced 598 grams.
Answer:
Given theoretical yield of NH3 is 945g.
The actual yield is 598g.
What is the %yield?
Explanation:
%yield of a chemical reaction can be calculated by using the formula:
[tex]%yield=\frac{actual yield}{theoretical yield} * 100[/tex][tex]\frac{actual yield}{theoretical yield} * 100[/tex]
Substitute the given values in this formula to get the %yield.
[tex]\frac{598g}{945g} * 100\\=63.3[/tex]
Hence, the %yield for the formation of ammonia is ---- 63.3.
A cup of coffee has 71 mL of coffee and 127 mL of water. What is the percent volume of the coffee solution?
Answer:
35.9%
Explanation:
The percent volume of the coffee solution can be calculated as follows:
% volume of coffee solution = volume of coffee/total volume of coffee solution × 100
According to this question, a cup of coffee has 71 mL of coffee and 127 mL of water. This means that, the total volume of coffee solution is;
71mL + 127mL = 198mL
% volume = 71/198 × 100
= 0.359 × 100
Percent volume of coffee solution = 35.9%
Does a reaction involving an acid and a base have to take place in a water environment? Justify your answer.
Answer:
Yes, because the water solvent is better
Explanation:
Hope this helps
How many liters of water is needed to make .340 M using 6.4 moles of Cu(OH)2?
Answer:
here, i think this helps
https://www.crestwoodschools.org/userfiles/867/Classes/9260/Moles%20Worksheet.pdf
2HCl → H2 + Cl2
Is synthesis?
Answer:
It's decomposition
explanation:
How do hydrogels retain water?
Answer:
The combination of the polymer opening up and the water molecules sticking to it make a solution of the hydrogel get thicker and more viscous (sticky). Disposable nappies make use of the ability of hydrogels to take up and retain water, even under pressure.
Explanation:
Elvis eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Elvis plans to go for a run later this afternoon. He is breathing normally. What does he need from the food he ate and the air he breathes so that he can go on his run? How do Elvis' body systems work together to get the molecules he needs into his cells? How do his cells use these molecules to release energy for his body to run?
Answer:
hi
Explanation:
What is the number of Co2 in a 220 gram
Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction? O sodium hydroxide + water → Sodium + hydrogen O sodium + water → sodium hydroxide + hydrogen O sodium + hydrogen → sodium hydroxide + water O sodium + sodium hydroxide → Water + hydrogen
The word equation that represents the violent reaction between sodium and water is as follows: sodium + water → sodium hydroxide + hydrogen.
What is a chemical reaction?A chemical reaction is the process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
According to this question, sodium (Na) and water (H2O) are involved in a chemical reaction to produce sodium hydroxide (NaOH) and hydrogen gas (H2).
Therefore, the word equation that represents the violent reaction between sodium and water is as follows: sodium + water → sodium hydroxide + hydrogen
Learn more about chemical reaction at: https://brainly.com/question/22817140
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i need help answering this question on my homework, could anyone help?
Which of the following is not an amphoteric substance?
a) lead(II) oxide
b) aluminum hydroxide
C) iron(ill) oxide
d) zinc oxide
Sắt oxit
Explanation:
what is the mass percentage for hydrogen
Answer:
The mass percent of hydrogen in hydrogen peroxide is 5.88
The mass percentage of hydrogen in water is 11.19 percent.
please help bbg'sssss
Answer:
Explanation:
from the way the trees look, i would say A: Wind from the sky, it seems B: Clouds and in the distance C:Precipitation(rain)
WILL GIVE BRAINLIEST - A solution has a [H3O+] of 1 × 10−3 M. What is the [OH−] of the solution?
11 M
14 M
1 × 10−14 M
1 × 10−11 M
Answer:
The answer is 1 x 10 - 11 M. :))
3. Pretend you're a farmer and you want to grow more crops. You have three different
fertilizers to choose from. Design an experiment that will help you choose which
fertilizer is best.
a. What variables would you need to control in your experiment?
b. Which variable would you change to test the fertilizers?
C. What is the measurable data point for this experiment?
d. What would the procedure be for your experiment?
Answer:
A
Explanation:
Loud speaker A vibrates 200 times each second. Loud speaker B vibrates 400 times each second.a)What is the frequency of the sound produced by Loud speaker A ? Give the value and unit.
b)Which loudspeaker produces higher frequency of vibrations?
(Show calculations)
Answer:
For a: The frequency produced by loudspeaker A is 200 Hz
For b: Loudspeaker B produces a higher frequency of vibrations.
Explanation:
To calculate the frequency of a loudspeaker, we use the formula:
[tex]\nu=\frac{\text{Number of vibrations}}{\text{Time period}}[/tex] ......(1)
where,
[tex]\nu[/tex] = frequency
For loudspeaker A:Number of vibrations = 200
Time period = 1 second
Putting values in equation 1:
[tex]\nu_A=\frac{200}{1s}=200Hz[/tex]
For loudspeaker B:Number of vibrations = 400
Time period = 1 second
Putting values in equation 1:
[tex]\nu_B=\frac{400}{1s}=400Hz[/tex]
Hence, the frequency produced by loudspeaker A is 200 Hz and loudspeaker B produces a higher frequency of vibrations.
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?
Answer:
c
Explanation:
Answer:
B: They must be cooler than the air inside the house.
Explanation:
I got it right on edge!
The correct formula for finding the relative velocity of an object is:
Vac= vah-vыс
Valc = ab + b c
Vad = ab + b c
b c = ab + b c
Answer:
va/c = v a/b + v b/c
Explanation:
This is the correct formula for relative velocity
1. Ecosystems are composed of biotic and abiotic factors. Which of the following
represent only an abiotic factor in an ecosystem that could have an effect on
the ecosystem?
a. rivers with more dams
b. wood being taken for manufacturing
c. waste not being used by fungi
d. decomposers only taking nutrients from plants
Answer:
wood being taken for manufacturing
A student tests a solid sample of a compound and determines that it does not conduct electric
current. When the
compound is dissolved in water, the solution does conduct electric current
What type of bonding does the compound have?
a.non polar covalent
b.ionic
c.polar covalent
d.metallic
Answer:
A
Explanation:
because they are non polar so would not conduct electricity :)
The type of bonding does the compound have non polar covalent.
What is non polar covalent?A non-polar covalent bond is just a sort of chemical bond that occurs when two atoms share electrons evenly. As a result, the count of electrons shared by neighboring atoms in an atom would be identical.
What is compound?A compound would be a material made up of two or maybe more chemical elements that have been chemically bonded together.
They still wouldn't conduct electricity even though they can non-polar.
Therefore, the correct answer will be option (A).
To know more about compound and non-polar compound.
https://brainly.com/question/13516179
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A sample of oxygen gas has volume 150.0 mL, at 0.947 atm, what will be the volume of the gas at 750.12 mm of Hg if temperature remain constant.
Answer:
143.9 mL
Explanation:
Applying,
PV = P'V'................. Equation 1
Where P = Initial pressure, V = Initial Volume, P' = Final pressure, V' = Final volume.
Make V' The subject of equation 1
V' = PV/P'............. Equation 2
From the question,
Given: P = 0.947 atm, V = 150 mL, P' = 750.12 mm of Hg = (750.12/760) = 0.987 atm,
Substitute these values into equation 2
V' = (0.947×150)/0.987
V' = 143.9 mL
N is another unit for mass True or False
An Element X has been discovered. Element X forms an Xt ion and
G9 EOT3 2020-
has an atomic number of 11. The X* ion of Element X forms a bond
with CI.
1-3
5.00
11
Na
Mg
3
22.99
19
24.10
20
21
K
Ca
Sc
19.10
400
19
Rb
Sr
Y
NOT
R$ 47
53
N7
so
CS
Ba
3.71
112.91
117 11
Ra
malleable and co
malene bi
Answer: The chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]
Explanation:
An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).
The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.
Element X has the atomic number 11 which is sodium. The electronic configuration of it is [tex]1s^22s^22p^63s^1[/tex]
This element will lose 1 electron to form [tex]X^+[/tex] ion of [tex]Na^+[/tex]
Chlorine has the atomic number 17. The electronic configuration of it is [tex]1s^22s^22p^63s^23p^5[/tex]
This element will gain 1 electron to form [tex]Cl^-[/tex] ion
When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of [tex]XCl[/tex] or [tex]NaCl[/tex]
Hence, the chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]
Write a balanced equation state the reaction type, and perform the requested stoichiometry: Carbon and hydrogen combine to form
methane. How many grams of carbon would be needed to react with 30.2 grams of hydrogen?
Answer:
C + 2H2 = CH4
Given 30.2g of H2
Find the Moles
Mole =Mass/Molar Mass
Molar Mass of H2 = 1x2 = 2g/mol
Mole = 30.2/2
= 15.1moles of Hydrogen gas.
Now from the balanced equation of Reaction above...
1mole of Carbon reacts completely with 2moles of Hydrogen gas.
"x" moles of carbon with react with 15.1moles of Hydrogen
x = 15.1/2
=7.55moles of carbon.
We now have moles of carbon.
To find mass
Mole =Mass/Molar Mass
Mass = Mole x Molar Mass
Molar mass of carbon = 12g/mol
Mass = 7.55 x 12
Mass = 90.6g of carbon is needed.
What is the oxidation state of each element in the compound CaSO4?
How many grams of ammonia (NH3) can be produced by the synthesis of excess hydrogen gas (H2) and 253.8 grams of nitrogen gas (N2) in a synthesis reaction?
Answer:
308.2 g of NH₃.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
3H₂ + N₂ —> 2NH₃
Next, we shall determine the mass of N₂ that reacted and the mass of NH₃ produced from the balanced equation. This can be obtained as follow:
Molar mass of N₂ = 2 × 14 = 28 g/mol
Mass of N₂ from the balanced equation = 1 × 28 = 28 g
Molar mass of NH₃ = 14 + (3×1)
= 14 + 3 = 17 g/mol
Mass of NH₃ from the balanced equation = 2 × 17 = 34 g
Summary:
From the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃.
Finally, we shall determine the mass of NH₃ produced by the reaction of 253.8 g of N₂. This can be obtained as illustrated below:
From the balanced equation above,
28 g of N₂ reacted to produce 34 g of NH₃.
Therefore, 253.8 g of N₂ will react to produce = (253.8 × 34)/28 = 308.2 g of NH₃.
Thus, 308.2 g of NH₃ were obtained from the reaction.
If [H3O^ + ]=1.7*10^ -3 M what is the pOH of the solution?
Answer:
The pOH of the solution is 11.23.
Explanation:
To solve this problem, we must remember the following formula for pH: pH = -log[H+].
If we plug in the value we are given, we can find the pH.
pH = -log[H+]
pH = -log(1.7*10^-3)
pH = 2.77
To find the pOH, we use the following formula:
pH + pOH = 14
To solve, we should plug in the value we found above for pH and solve for the pOH.
2.77 + pOH = 14
pOH = 11.23
Therefore, the correct answer is 11.23.
Hope this helps!
