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Effectus [21]
2 years ago
11

Which of the following statements about matter is false?

Chemistry
2 answers:
4vir4ik [10]2 years ago
8 0
The statement that is incorrect I believe would be A. The amount of matter increases slightly as water changes state.
weqwewe [10]2 years ago
4 0
I think the correct answer from the choices listed above is option A. The statement that is false about matter is that the <span>amount of matter increases slightly as water changes state. This statement is very far from being true. There is no known correlation between the amount of matter and the change of state in water.</span>
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In the balanced reaction below, what is the mole ratio comparing iron (Fe) and oxygen gas (O2)?
zepelin [54]

The given balanced reaction is,

4Fe(s) + 3O_{2}(g) --->2Fe_{2}O_{3} (s)

The stoichiometric coefficients of each element or compound represents the number of moles of that element or compound required for the complete reaction to take place.

The mole ratios of different products and reactants will be:

\frac{Fe}{O_{2}} = \frac{4 mol Fe}{3 mol O_{2}}

\frac{Fe}{Fe_{2}O_{3}} = \frac{4 mol Fe}{2 Fe_{2}O_{3}}

\frac{O_{2}}{Fe_{2}O_{3}} =\frac{3 mol O_{2}}{2molFe_{2}O_{3}}

So the mole ratio comparing iron (Fe) and oxygen gas (O_{2}) is

4 : 3

5 0
3 years ago
Read 2 more answers
Corinne uses a model rocket in her physical science class. The rocket begins its trip traveling vertically at 22 m s . It reache
dezoksy [38]

The answer is D have a good day

8 0
2 years ago
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Number of atoms in compound<br><br> Mg(OH)2
Crank

ANSWER

there are 20 number of atoms in compound

Explanation:

In a formula unit of Mg(OH)2, there are one magnesium ion and two hydroxide ions; or one magnesium, two oxygen, and two hydrogen atoms.

3 0
2 years ago
Consider formula A to be v = StartFraction 2 pi r over T EndFraction and formula B to be v2 = GStartFraction 2 pi r over T EndFr
MissTica

Answer:

The formulas that will be used are:

Situation one:

The moon will be experiencing gravitational force in the form of centripetal force, so we equate the two formulas.

Gravitational force = GMm /r²

Centripetal force = mv²/r

Equating,

GMm/r² = mv²/r

v² = GM/r

The first scenario will use the formula v² = GM/r

Situation 2:

The second situation will use the simple distance over time formula for velocity, where the distance will be the circumference and the time will be in seconds.

v = 2rπ/t

Explanation:

8 0
2 years ago
Read 2 more answers
3. Suppose a student determined the empirical formula of the compound to be K3[Fe(C2O4)3] 2H2O, rather than the correct formula
yuradex [85]

Answer:

Explanation:

When determining empirical formulas of hydrates we have to find the mass of water which left the hydrate when heating The sample. This amount of water calculated will provide us with the correct ratio of moles water / moles anhydrate since moles water > moles anhydrate. The mistake might have been done while determining the water that left the sample so then we see and impropre result in ratios.

8 0
2 years ago
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