When 6.8776g of aluminium reacts with an excess of oxygen, 6.8776g of aluminium oxide are produced.
What is the name of aluminum oxide?
Al2O3 is an inorganic chemical reagent with the chemical name aluminum oxide. Other names for it include alumina, alundum, al-alumina, and aloxide.
If there are 4 moles of Al that equals 107.926156 grams of 4Al
If there are 2 moles of Al2O3 that equals 203.9226g
If 107.9261 grams of 4Al equals 203.9226 grams of 2Al2O3 then, 3.64g of Al equals x
107.9261 / 3.64 = 203.9226 / x
(107.9261) x = (203.9226) 3.64
107.9261 x = 742.2782
dividing both LHS and RHS by 107.9261,
107.9261/107.9261x = 742.2782/107.9261
x = 6.8776g
Hence, 6.8776g of aluminium oxide are produced.
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A compound is found to contain 29.67 % sulfur and 70.31 % fluorine by mass.
To answer the question, enter the elements in the order presented above.
QUESTION 1:
The empirical formula for this compound is
anyone know the answer to this please?
Determine the molecular and empirical formulas for the substance shown in the ball-and-stick model below.
The elements Beryllium (Be), Magnesium (Mg), Calcium (Ca) and Strontium (Sr) are all what?
answer : alkaline earth metals ..
define saturated and unsaturated fats
Answer:
A saturated fat is a type of fat in which the fatty acid chains have all or predominantly single bonds. A fat is made of two kinds of smaller molecules: glycerol and fatty acids. Fats are made of long chains of carbon atoms. Some carbon atoms are linked by single bonds and others are linked by double bonds and a type of fat containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fat.
Explanation:
good luck
Which would have a stronger attraction to the nucleus, the outer electrons of a carbon atom or the outer electrons of an oxygen atom? Why?
The outer electron of an oxygen atom will have a stronger attraction to the nucleus than the outer electrons of a carbon atom.
In the periodic table, atomic sizes decrease across the period. This decrease in atomic size stems from increase in the size of the nuclear charge.
This implies that as we move from left to right in the periodic table, atoms of elements become smaller due to stronger nuclear attraction as the size of the nuclear charge becomes larger.
Oxygen atom has a nuclear charge of +8 while carbon atom has a nuclear charge of +6. Therefore, outer electron of an oxygen atom will have a stronger attraction to the nucleus than the outer electrons of a carbon atom.
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Calculate the mass of 6.02 x 10^23 formula units of iron (III) chloride, FeCl3?
Answer: 162.2 g
Explanation: 6.02 × 10^23 particles is one mole.
Molar mass of FeCl3 is 55.85 + 3· 35.45 = 162.2 g/mol
Explain why this substance is formed?
Explanation:
About which substance you are talking?
PLEASE HELP!! IM BEING TIMED
It takes 1 frame, 1 seat, 2 pedals, and 3 wheels to make 1 tricycle. If I start with 200 frames, 200 seats, 200 pedals and 240 wheels, how many tricycles can you make? What did you run out of? What is the limiting reactant?
Answer:
80 tricycle
Explanation:
Because u need 3 wheels to for each tricycle so Ll u have to do is just divide 3 with 240 u will get 80
What are prevailing winds
Answer:
a wind from the direction that is predominant at a particular place or season.
Explanation:
Brainlest is appriciated
answer it for 70 piontssssss !!!!!!!!!!
Which of the following formulas represents an empirical formula?
A. C8H18
B. C4H10
C. C2H5
D.C2H4
Answer:
C is the only option that represents an empirical formula, as it can't be simplified further.
You can turn C8H18, for example: to C4H9, but you can't do the same with C2H5.
Let me know if this helps!
5.14 x 1023 ions NaCl to Moles
Answer:
2 moles
Explanation:
For a mole NaCi, we have a mole of sodium ion and a mole of chloride.
Which statement best describes the use of a chemical indicator in a titration?
A. It must be measured to the nearest 0.01 mL.
B. It must be colored in the acid solution.
C. It must measure pH directly at all pH values.
D. It must change color near the equivalence point.
The statement best describes the use of a chemical indicator in a titration is it must change color near the equivalence point.
What is a chemical indicator?A chemical indicator is any substance that shows a chemical change by color or other things.
In titration, phenolphthalein is used as an indicator in the titration of an acid or base.
Other chemical indicators are methyl yellow, litmus paper, and pH indicator.
Thus, the correct option is D. It must change color near the equivalence point.
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PLEASE HELP IMMEDIATELY WILL GIVE BRAINLIEST
Which line (A or B) represents a faster
speed?
Answer:
A
Explanation:
Because in 1 second, line A was faster than line B.
What are 2 substances that DO NOT REACT?
Water and oil? Cake and your finger? Glass and virtually anything? ...
Tonnes and tonnes of noninterreactant substances.
Hope this helps.
How many moles are in 2.8x10^23 atoms of Calcium?
Answer: 1 mole ➡️ 6.022×10²³ atoms of si.
X mole ➡️ 2.8×10²⁴ atoms of si.
X = 2.8×10×10²³/6.022×10²³
= 28/6.022
= 4.65 moles.
Explanation:
The total number of moles in 2.8x10^23 atoms of Calcium will be 4.65 moles.
What is a mole?The mole is defined as the amount of substance containing the same number of chemical units (atoms, molecules, ions, electrons, or other specified entities or groups of entities) as exactly 12 grams of carbon-12
The mole unit allows us to express amounts of atoms and molecules in visible amounts that we can understand.
For example, we already know that, by definition, a mole of carbon has a mass of exactly 12 g. This means that exactly 12 g of C has 6.022 × 10 23 atoms
1 mole is 6.022×10²³ atoms of calcium
one mole of calcium = 2.8×10²⁴
substitute the value in the equation,
2.8×10²⁴ atoms of calcium = 2.8×10×10²³/6.022×10²³
total number of moles = 28/6.022= 4.65 moles
Therefore, the total number of moles will be 4.65 moles
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What are the purpose of a chemical equation check all that apply
Answer: (A,B,D) [1, 2, 4]
Explanation:
define saturated and unsaturated fats
Answer:
SATURATED: Saturated fat is a type of fat in which the fatty acid chains have all or predominantly single bonds.
UNSATURATED: Unsaturated fats are loosely packed. They tend to be liquid at room temperature.
There are two main types of unsaturated fat:
Monounsaturated
Polyunsaturated
A tank of gas is found to exert 8.6 atm at 38°C. What would be the required
temperature to change the pressure to standard pressure?
Answer:
36.2 K
Explanation:
Step 1: Given data
Initial pressure of the gas (P₁): 8.6 atmInitial temperature of the gas (T₁): 38°CFinal pressure of the gas (P₂): 1.0 atm (standard pressure)Final temperature of the gas (T₂): ?Step 2: Convert T₁ to Kelvin
We will use the following expression.
K = °C +273.15
K = 38 °C +273.15 = 311 K
Step 3: Calculate T₂
We will use Gay Lussac's law.
P₁/T₁ = P₂/T₂
T₂ = P₂ × T₁/P₁
T₂ = 1.0 atm × 311 K/8.6 atm = 36.2 K
how does berylium apply to real life
☁️ Answer ☁️
Safety features like air bags and fire suppression sprinkler systems are maintained in a state of constant readiness, saving lives thanks to the reliability and strength of beryllium.
❤️
Beryllium is a part of many of the things you rely on each day, including cellular phones, kitchen and laundry appliances, home temperature controls, MP3 players, desktop and portable computers, and your car.
❤️
Beryllium and beryllium–containing materials are utilized extensively in many of the high tech devices (including satellites and imaging systems) used by the military to keep our citizens safe at home and abroad.
❤️
Used in high-resolution medical imaging and laser equipment, beryllium is a valuable part of the medical field’s arsenal to help you fight disease and stay healthy.
Hope it helps.
Have a nice day noona/hyung!~ ￣▽￣❤️
if the pressure, volume, and tempature of a gas are known which can most likely be found by using the ideal gas law
• the molar amount of the gas
•the partial pressure of the gas
•the stand temperature
•the molar mass
Answer:
• The molar amount of the gas
Explanation:
Hello!
In this case, according to the ideal gas law:
[tex]PV=nRT[/tex]
Whereas P stands for pressure, V for volume, n for the molar amount of the gas, R for the universal gas constant and T for the temperature, we can see that as pressure, volume and temperature are given, we can compute the molar amount of the gas as shown below:
[tex]n=\frac{PV}{RT}[/tex]
Since R is a constant always.
Best regards!
All substances freeze at the same temperature, so they all have exactly the
same freezing point.
O True
O False
Answer:
I think it would be false
Explanation:
All things have a unique freezing/melting point
2. What is the molality of a solution in which 25 g of NaCl is dissolved in 20 kg of
water?
Answer:
0.21 m
Explanation
25 NaCl * 1 mole/58.44 g NaCl * 1/20 kg = 0.21 m
How many electrons can beryllium lend
Answer:
2 because it has two outer shell electrons out of 8 (relevant rule only for the first 20 elements)
Which of the following best describe the parts of the volcano?
a .mountain or hill
B. are openings in the earth surface
c. are found only on land D. composed of caldera, vent and crater
Answer:
B. are openings in the earth surface
water is a ____ molecule meaning the positive hydrogen end attracts the negative oxygen ends of another
A. balance
B.universal
C. wet
D.polar
please answer! will give brainliest
Water is a polar molecule where, the positive hydrogen end attracts the negative oxygen ends of another water molecule. Thus, option D is correct.
What is polarity ?Polarity is ability of charge separation in a molecule. In some molecules, the positive and negative ends exists separately and both ends remains reactive towards the counter charged end of other molecule.
The charge separation in molecules results in a dipole moment. Permanent dipole moment make the molecule polar. Water is a polar molecule.
The shared pair of electrons in water are more attracted towards the electronegative oxygen atom leads the charge separation. This polarity helps to the formation of strong intermolecular hydrogen bonding.
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What does (endangered wildlife) mean ?
Answer:
Hey mate....
Explanation:
This is ur answer.....
A species considered to be facing a very high risk of extinction in the wild.
Hope it helps you,
Mark me as the brainliest...
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Answer:
It means when a species in the wildlife is in danger or close to being completely extinct.
pls help will give brainilest or however you spell it
Answer:
1. balanced
2. balanced
3. unbalanced
4. balanced
5. balanced
6. unbalanced
7. balanced
8. unbalanced
Explanation: