3 years ago

Los campers ________ por un parque cerca del camping. Question options: dan una caminata se duermen toman una ducha

Chemistry

1 answer:

zvonat [6]3 years ago

3 0

Answer:

dan una caminata

Explanation:

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0.125L or 125 mL

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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

What are some chemacial changes in your school?

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Putting glue on something, because once it is set in you cannot change it back.

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The group of atoms held together by covalent bonds is called a molecule

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3 years ago

when a number in scientific notation contains a significant zero, is that zero also significant in the expanded notation? give t

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</span>

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3 years ago