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3 years ago

Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change

2 answers:

8 0

Mixing water and sugar is a physical change. A physical change is just a change in the form of the substance, whereas a chemical change is when the substance itself changes… chemically. An easy way to figure out which is which is trying to "undo" the change. If it can be undone, it is physical.

stiks02 [169]3 years ago

5 0

If to evaporate water, there will be a sugar.

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4 FeCO3 + O2 --> 2 Fe2O3 + 4CO2

Andre45 [30]

The percentage yield of the reaction : 93.3%

Mass of FeCO₃ 2310.44 g

<h3>Further explanation </h3>

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products

Reaction

4 FeCO₃ + O₂ ⇒ 2 Fe₂O₃ + 4CO₂

MW FeCO₃ : 115,854 g/mol

MW Fe₂O₃ : 159,69 g/mol

mol FeCO₃

$\tt \dfrac{35}{115.854}=0.302$

mol Fe₂O₃

$\tt \dfrac{2}{4}\times 0.302=0.151$

mass Fe₂O₃

$\tt 0.151\times 159.69=24.113~g$

percent yield

$\tt \dfrac{22.5}{24.113}\times 100\%=93.3\%$

mol of 1 kg Fe₂O₃ = 1000 g

$\tt \dfrac{1000}{159.69}=6.262$

mol of FeCO₃

$\tt \dfrac{4}{2}\times 6.262=12.524$

mass of FeCO₃

$\tt 12.524\times 115.854=1450.955~g$

a purity of 62.8%

$\tt \dfrac{100}{62.8} \times 1450.955=2310.44~g$

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3 years ago

A large atom decays and emits a particle. After the reaction is complete, the atom’s mass has changed substantially. What kind o

hoa [83]

The answer is alpha particles <span />

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2 years ago

Read 2 more answers

What is the Lewis structure for CH2NO2H

Irina-Kira [14]

Answer:

Please check attachment

Explanation:

Here in this question question, we are concerned with writing the Lewis structure for the given molecule.

The Lewis structure is simply using dots to represent electrons which are not involved in the bonding.

That is, we shall be using dots to represent the non-bonding pairs of electrons around the atoms which are central.

Please check the attachment for the diagram

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