Answer:
Theoretical yield = 40.8g
Explanation:
4Al + 3O2 ----] 2Al2O3
if 27.0g of Al ----] 102.0g of 2Al2O3therefore 10.8g -----] xg10.8g×102.0g/ 27.0g
theoretical yield = 40.8 g
Answer:
20.410 grams of Al2O3 are produced
Explanation:
First, we need to calculate the number of moles of aluminum that are actually reacting..
We will convert from grams to moles using the atomic weight which (for aluminum) is 26.982 g/mol (which can also be rewritten as 1 mol/26.982)
10.8 g Al * 1 mol Al/26.982 g Al = 0.4002668446 moles Al
**Grams cancel out, so we are left with moles
(I would type this differently so that it would make more sense visually, however brainly is giving me errors, so try writing it out yourself if it doesn't initially make sense..put the equation in fraction form)
Now that we have the moles of Al, we will convert from moles of Al reacting to moles of aluminum oxide produced..
To do this we will use the balanced chemical equation..
4Al + 3O2 -> 2Al2O3
Using the balanced chemical equation, we can see that for every 4 moles of aluminum that react, 2 moles of aluminum oxide are produced..
0.4002668446 moles Al * 2 mol Al2O3 / 4 mol Al
= 0.2001334223 moles Al2O3..
Now we need to convert from moles of Al2O3 to grams..
We can do this using the atomic weight of Al2O3..
The atomic weight of Al2O3 is 101.961 g/mol or 1 mol/101.961 grams
Now we will convert to grams of Al2O3...
0.2001334223 moles Al2O3 * 101.961 grams Al2O3/1 mol Al2O3
= 20.40580387..
20.410 grams of Al2O3 are produced
Calcium solid is placed in a solution of iron (III) chloride producing calcium chloride and iron solid
Answer:
3Ca₍s₎ + 2FeCl₃ -------------------------------------------------------------> 3CaCl₂ + 2Fe₍s₎.
Explanation:
Iron(III) chloride is also known as Iron trichloride and it has the molar mass value of 162.2 g/mol and density of 2.9 g/cm³.
The balanced equation for the chemical reaction between solid calcium and iron (III) chloride is given below as:
3Ca₍s₎ + 2FeCl₃ -------------------------------------------------------------> 3CaCl₂ + 2Fe₍s₎.
This kind of chemical reaction is known as single displacement reaction or single replacement reaction.
What does the calculated value of the equilibrium constant, Keq indicate regarding the degree of completeness of the reaction? In other words, at equilibrium, are there mostly products, reactants, or relatively large amounts of both?
Answer:
both
Explanation:
because equilibrium means that both sides of the reaction are equal
The concentration of the products is high at equilibrium if Keq is a large number (Keq > 1). The reaction in this instance encourages the production of products. The concentration of the reactants is high at equilibrium if Keq is a small number (Keq1).
What is equilibrium ?Chemical equilibrium is the condition where both the reactants and products are present in concentrations that have no further tendency to change over time, preventing any discernible change in the system's properties.
The size of a reaction when it is at equilibrium is represented by the equilibrium constant, K. It creates a ratio using the concentrations and coefficients of each reactant and product.
K is regarded as intermediate if it is larger than or equal to 0.001 but less than or equal to 1000. Significant quantities of reactants and products will be present. When the equilibrium constant K is big, products predominate at equilibrium, but when it is small, reactants predominate.
Thus, The concentration of the products is high at equilibrium if Keq is a large number.
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what host is used to make the flu vaccine and why can this host be a problem for some people?
3.A sample of chlorine contains 75% of 35
17Cl and 25% of 37
17Cl.
Calculate the relative molecular mass of chlorine.
Answer:
35.5
Explanation:
Given parameters:
Abundance of chlorine Cl - 35 = 75%
Mass of Cl - 35 = 35
Abundance of Cl - 37 = 25%
Mass of Cl - 37 = 37
Unknown:
Relative molecular mass = ?
Solution:
The relative molecular mass of the chlorine can be deduced using the expression below:
Relative molecular mass = (abundance x mass of Cl - 35) + ( abundance x mass of Cl - 37)
Relative molecular mass = (75% x 35) + (25% x 37) = 35.5
3.4 g of AGno3 are dissolved to make a 200 ml solution what is the molarity
Answer:
hehe you might think im crazy but this answer makes no sEnSe
Explanation:
How many grams do 3.6 × 10^20 atoms of sodium weigh?
Answer in units of g.
Answer:
i
Explanation:
which part of a human cell contains chromosomes
Answer:
nucleus
Explanation:
Which energy level has the most energy available to it?
4
3
2
1
Minerals are only used for gemstones and jewelry.
True
False
Answer:
false
Explanation:
the answer is false because there is minerals in our water, ect.
Answer:
False because there are many minerals used for many different things
Which bonds form in this reaction used to make ammonia, NHg?
Answer:the bonds between the two nitrogen atoms and between each pair of hydrogen atoms
Explanation:
Answer: the bonds between the nitrogen and hydrogen
Explanation: I just did it but it's possible you might have a different question
What is kinetic energy?
All can change the Earth suddenly and swiftly except
A. erosion
B. asteroid impact
C. landslide
D. eruption
Answer:
Asteroid impact
Explanation:
:)))) jdiedhdueu
Answer:
A)erosion takes time and besides deposition will come soon after
Explanation:
If body fat has a density of .94g/mL and 4.0L of fat is removed, how many pounds of fat were removed?
Answer:
8.3lb of fat were removed
Explanation:
To solve this problem we need to convert the liters of fat removed to mL. Using the mL and density we can find the grams. To convert grams to pounds we must use (1lb = 453.592g):
mL fat:
4.0L * (1000mL / 1L) = 4000mL
g fat:
4000mL * (0.94g / mL) = 3760g of fat
lb fat:
3760g of fat * (1lb / 453.592g) =
8.3lb of fat were removed10 points and brainest
Answer:
B. Its direction changes, it's speed changes, and it's wave length changes.
Explanation:
If not, I'm sorry I'm not that smart or it might be d. I don't know
Answer: no one needs this anyway
Explanation:
What is the weight of 9.228 mol of copper?
Answer in units of g.
Answer:
590.2524g .
Explanation:
How would you decrease the mass number?
Answer:
Protons are positively charged. When a nucleus emits an alpha particle, these changes happen: the mass number decreases by 4. the atomic number decreases by 2.
Explanation:
In the equation 2A1 + 3Fe(NO3)2 + 3Fe + 2AI(NO3),
iron has been replaced by what ?
Answer:
2Al +3Fe(NO3)2 --------> 3Fe + 2Al(NO3)3
In the above reaction Aluminum and iron nitrate reacts to produce iron metal and aluminum nitrate so aluminum is replace by iron
Instruction: restate the background information in your own words what is Charles law a relationship do you expect to see between volume and temperature? Why?
Answer:
detail is given below.
Explanation:
Charles Law:
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
It means when we increase the temperature volume is also goes to increase and vice versa.
Let's consider the example,
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 4.5 L × 348 K / 298 k
V₂ = 1566 L.K / 298 K
V₂ = 5.3 L
We can see when temperature is increase from 298 K to 348 K volume is also increased from 4.5 L to 5.3 L.
The SI unit for force is the
Answer:
Newton, symbol N
What frequency is radiation with a wavelength of 5.00 x 10^-6 cm? In what region of the electromagnetic spectrum is this radiation?
P.S it's due today
Answer:
f = 6 × 10^15 Hz in the ULTRAVIOLET (UV) region
Explanation:
Using λ = v/f
Where;
λ = wavelength (m)
v = speed of light (3 × 10^8m/s)
f = frequency (Hz)
According to this question, λ = 5.00 x 10^-6 cm
= 5.00 x 10^-8 m
λ = v/f
f = v/λ
f = 3 × 10^8 ÷ 5.00 x 10^-8
f = 0.6 × 10^(8+8)
f = 0.6 × 10^16
f = 6 × 10^15 Hz
In the electromagnetic spectrum (EM), a frequency of 10^15 is found in the ULTRAVIOLET region. This means that this radiation with a wavelength of 5.00 x 10^-6 cm and frequency of 6 × 10^15 Hz is in the ULTRAVIOLET region of the EM spectrum.
I’ll give people points if they answer this plz(math)
Which of these is a difference between a single skin cell and the skin tissue that covers an entire hand?
A.
A skin cell has a less complex structure than skin tissue has.
B.
A skin cell provides protection, but skin tissue does not.
C.
A skin cell grows more than skin tissue grows.
D.
A skin cell contains fluid, but skin tissue does not.
Answer:
A. A skin cell has a less complex structure than skin tissue has.
Explanation:
A skin cell has a less complex structure than skin tissue has. Hence option A is correct.
What is cell?Cell is defined as the smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. The three essential parts of a cell are the cell membrane, nucleus, and cytoplasm. From bacteria to humans, cells give all living things their structure and functionality.
The tiniest, structurally and functionally distinct, and typically microscopic, unit of an organism is called a cell. The several forms of material made up of specialized cells and their byproducts are referred to as tissues. Cells are very small. The size of tissues is macro.
Thus, a skin cell has a less complex structure than skin tissue has. Hence option A is correct.
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which part of the human body is more complex your heart of the circulatory system
Answer:
The circulatory system
Explanation:
The human body has two circulatory systems, the pulmonary system, and the systemic system.
Help please please
Science atoms
Quick help
Answer:
step 3
Explanation:
electrons have a negative charge which is -1
protons have carry a positive charge +1
neutrons possessing no net charge which is 0
Calculate the mass of Na
Answer:
22.98977
Explanation:
Na is actually sodium and its atomic number is 11.
I'm not sure if this is multiple choice or a question where you have to answer in writing but here is the mass of Na 22.98977.
Hope this helps
Please help due soon.
Answer:
X
Explanation:
because it is the greatest
NH4 oxidation number
What is a colander used for?
A
measuring liquid and dry ingredients
B
straining liquid out of food
C
mixing ingredients together
D
separating egg yolks from the whites
Answer:
b is the answer have a good day
which are exmaples of chemical change?
•baking cookies
• The statue of liberty's metal tarnishes from copper to green
• cold butter melts into liquid when heated
•salt is dissolved into freshwater
•Food scraps decompose into fertilizer in a compost pile
• frying changes the color and texture of an egg
•ocean water evaporates to water vapor on a hot day
•lighting a match
Answer:
C: salt is dissolved into freshwater
D: salt is dissolved into freshwater
F: frying changes the color and texture of an egg
G: ocean water evaporates to water vapor on a hot day
Hsaio manages the finances for her company and has a particularly large amount of money budgeted for the purchase of calcium chloride, or CaCl2. Which type of company does Hsaio most likely own?
a snow-plowing service
a cosmetics factory
a pottery art studio
a catering business
Answer:
cosmetics factory
Explanation:
The company owned by Hsaio has been most likely to be the cosmetic factory. Hence, option B is correct.
What is a cosmetics factory?A cosmetic manufacturer is a company that manufactures cosmetic items. The products manufactured by the cosmetic industry include soap, shampoo, and toothpaste that smell good, such as perfume and deodorant.
The cosmetic industry products are formed to be viscous in nature, in order to be applied with ease in personal care. Calcium chloride has been the chemical agent that has been mediating to add viscosity to cosmetic products.
Since, Hsaio has been incorporating most of the budget of his company over calcium chloride, a product used in the cosmetic industry. Thereby he is most likely to own a cosmetic factory. Hence, option B is correct.
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