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Mila [183]
3 years ago
11

4.6 x 105 How many significant figures?

Chemistry
1 answer:
nordsb [41]3 years ago
6 0

Answer:

2

Explanation:

4.6 has two figures.  The 10^5 tells us only that it is a very large number, but adds nothing that tells us the number was any more accurately measured than what was provided in the 4.6

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AleksAgata [21]

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the speed of the wave is 96.6

Explanation:

to find do frequency x wavelength

6 0
3 years ago
Explain the term 'end point'?<br> What do you mean by a 1.0 M solution?
andrey2020 [161]

Answer:

According to me end point is the end of a reaction

4 0
2 years ago
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What kind of reaction is sncl2(s)+tibr2(s) ---&gt; snbr2+ticl2?
Elanso [62]
Chemical replacement
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3 years ago
How many moles of Al will be consumed when 0.400 mol of Al2O3 are produced in
Vladimir [108]

Answer:

C) 0.800 mol

Explanation:

  • 4Al + 3O₂ → 2Al₂O₃

In order to <u>convert from moles of Al₂O₃ into moles of Al</u>, we'll need to use<em> the stoichiometric coefficients</em>, using a conversion factor that has Al₂O₃ moles in the denominator and Al moles in the numerator:

  • 0.400 mol Al₂O₃ * \frac{4molAl}{2molAl_2O_3} = 0.800 mol Al

So the correct answer is option C).

7 0
3 years ago
Many homeowners treat their lawns with CaCO3(s) to reduce the acidity of the soil. Write a net ionic equation for the reaction o
Agata [3.3K]

The reaction of acid, assuming HCl and calcium carbonate always produces a gas. The reaction is as follows:
2 HCl + CaCO3 --> CaCl2 + H2CO3 
H2CO3, carbonic acid, is a weak acid that is unstable in water solutions at high concentrations. As such, it decomposes: 
H2CO3 --> H2O + CO2 
Then, 
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The total ionic equation looks as follows: 
2H+(aq) + 2 Cl-(aq) + CaCO3(s) --> Ca+2(aq) + 2 Cl-(aq) + H2O(l) + CO2(g) 
Clearly, Cl- is a spectator ion as it is unchanged in the reaction. The net ionic reaction looks as follows: 
2 H+(aq) + CaCO3(s) --> Ca+2(aq) + H2O(l) + CO2(g)
4 0
3 years ago
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