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Pie
4 years ago
10

Why beaker is least accurate

Chemistry
2 answers:
Alexxandr [17]4 years ago
5 0
It's very difficult to achieve accurate measurements
rodikova [14]4 years ago
3 0
Beakers are usually very wide and not needed for precise measurements so they don't need to be exact. Instead manufacturers produce graduated cylinders and volumetric flasks for when precision is important.
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A 100g of sample of a compound is combusted in excess oxygen and the products are 2.492g of CO2 and 0.6495 of H2O. Determine the
ruslelena [56]

The empirical formula : C₁₁O₁₄O₃

<h3>Further explanation</h3>

The assumption of the compound consists of C, H, and O

mass of C in CO₂ =

\tt \dfrac{12}{44}\times 2.492=0.680~g

mass of H in H₂O =

\tt \dfrac{2.1}{18}\times 0.6495=0.072~g

mass of O :

mass sample-(mass C + mass H)

\tt 1-(0.68+0.072)=0.248`g

mol of  C :

\tt \dfrac{0.68}{12}=0.056

mol of H :

\tt \dfrac{0.072}{1}=0.072

mol of O :

\tt \dfrac{0.248}{16}=0.0155

divide by 0.0155(the lowest ratio)

C : H : O ⇒

\tt \dfrac{0.056}{0.0155}\div \dfrac{0.072}{0.0155}\div \dfrac{0.0155}{0.0155}=3.6\div 4.6\div  1\\\\\dfrac{11}{3}\div \dfrac{14}{3}\div \dfrac{3}{3}=11:14:3

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3 years ago
Which of the following statements regarding physical and chemical changes is true?
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The students who conducted the shadow length experiment concluded that their results concluded that their results supported thei
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BRAINLIEST TO CORRECT only answer number 10 please
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Answer:

they are softer as you go deeper

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2 years ago
When 3.00 moles of hydrogen molecules and 1.50 moles of oxygen molecules react, they form 3.00 moles of water according to the r
Oksanka [162]
Hello there.

<span>When 3.00 moles of hydrogen molecules and 1.50 moles of oxygen molecules react, they form 3.00 moles of water according to the reaction below.



How many grams of oxygen were required?

Answer: </span><span>48.0 g
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6 0
3 years ago
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