3 years ago

What might cause scientists to change a scientific theory?

Chemistry

2 answers:

nata0808 [166]3 years ago

5 0

I think the answer is c.

ioda3 years ago

4 0

Answer:

Explanation:

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3 years ago

When 2.3 × 10^3 g of CaCO3 are heated, the actual yield of CaO is 1.09 × 10^3g. What is

iren [92.7K]

The percent yield : 4. 84.58%

<h3>Further explanation</h3>

Reaction

CaCO₃ ⇄ CaO+CO₂

mass CaCO₃ = 2.3 × 10³ g

mol CaCO₃ (MW=100.0869 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{2.3\times 10^3}{100,0869}\\\\mol=22.98$

From the equation, mol CaCO₃ : CaO = 1 : 1, so mol CaO=22.98

mass CaO(MW=56.0774 g/mol)⇒ (theoretical) :

$\tt mass=mol\times MW\\\\mass=22.98\times 56,0774\\\\mass=1288.659~g$

The percent yield :

$\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{1090}{1288.659}\times 100\%\\\\\5yield=84.58\%$

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3 years ago

Hello people ~

Klio2033 [76]

<h3>CHEMISTRY</h3>

What is the most basic aromatic amine’s common name?

a) Benzenamine

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2 years ago

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Why did mendeleev leave blank spaces in his version of the periodic table?.

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<h2>Answer: He left blank spaces for <em>undiscovered</em> elements to be added to the table.</h2>

Explanation:

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What color of light refracted the most as it passes through a prism?

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3 years ago