The formula of a compound is written based on the valency of each bonded atoms. The formulas Mg₂(SO₄)₃, Rb₃As are incorrect. Such compounds does not exist.
What is chemical formula?The formula of a chemical compound is written based on the number of atoms participated in bonding. Magnesium is second group element having two valence electrons.
Magnesium thus donates its two electrons into the bonding atom or group. The sulphate group SO₄ have a valency of 2 it gains two electrons from Mg when bonded.
Thus the formula of magnesium sulphate being MgSO₄ and not Mg₂(SO₄)₃. Similarly Rb is a second group metal having two valence electrons. Its valency being two. As is a halogen with valency one. Thus they cannot form a compound like Rb₃As.
Hence, option a and b are incorrect formulas.
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Answer:
D. 4:3
Explanation:
The mole ratio is simply the coefficients in a balanced chemical reaction and their relation to each other. For example, the mole ratio between Al and [tex]Al_{2}O_{3}[/tex] is 2:1, and the ratio between [tex]O_{2}[/tex] and [tex]Al_{2}O_{3}[/tex] is 3:2.
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The Olympian swam 200 meters in 20 seconds.
1) velocity
2) acceleration
3) speed
Answer: velocity
Explanation:
which process helps guarantee that a species continues to involve over hundreds of years?
A. growth
B. nutrition
C. reproduction
Answer:
C. reproduction
Explanation:
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Answer:
A, B, C
Explanation:
WDYT a mixture is? Please help
Answer:
A mixture is when two substances are physically combined and can be taken apart.
Explanation:
my words
connect them, dont guess please + 23 points
Answer:
Astronaut- highly trained individual for space travel
Payload Specialist- partnering scientist, journalist, or political guest.
Space Sickness- nausea, vomiting, and upset stomach.
Muscle Atrophy- the result of microgravity.
Johnson Space Center- training facility for U.S. astronauts.
What is the atomic number of the following element??
Answer:
91
Explanation:
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What is the molecular formula for a compound that is 34.31% sodium, 17.93% carbon, 47.76% oxygen and has a molar mass of 134.00g?
Answer: Na2C2O4 probably sodium oxalate
Explanation: assume you have 100 g substance.
Mass of Na is m(Na) = 34.31 g, m(C) = 17.93 g and m(O) = 47.76 g.
Calculate moles n(Na) = 34.31 g/22.99 g/mol= 1.49 mol.
For C n(C) = 1.49 mol and n(O) = 2.985. You divide all by 1.49 you
Get n(Na) : n(C) : n(O) = 1:1:2 M(NaCO2) = 67 g/mol.
Divide 134:67 = 2. You get formula Na2C2O4
What is an important effect of gravity?
Answer:
pulling objects with mass closer to each other
Explanation:
that is the only role of gravity
A block of concrete has a mass of 5100 g and a volume of 2500 cm3 . Calculate the density.
Answer:
2.04 g/cm3
Explanation:
Density = mass ÷ volume
= 5100 ÷ 2500
=2.04 g/cm3
From point A to point B, the car will . From point B to point C, the car will . Assuming the washer on the car is not blocked by the book, once the car hits the book, the washer will still have . This experimental design will examine Newton’s law.
Answer:
Accelerate, Have Constant velocity, Velocity, and First
Explanation:
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From point A to point B, the car will . From point B to point C, the car will assuming the washer on the car is not blocked . It will examine Newton’s law will be "Accelerate, Have Constant velocity, Velocity, and First."
What is Newton’s law ?The link between an object's motion with even the forces acting on it is outlined by Newton's laws of motion, which were three fundamental principles of classical mechanics.
What is velocity?The displacement of the item in one unit of time would be the definition of velocity.
Therefore, from point A to point B, the car will . From point B to point C, the car will assuming the washer on the car is not blocked . It will examine Newton’s law will be "Accelerate, Have Constant velocity, Velocity, and First."
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