Answer:
749 grams CO₂
Explanation:
To find the amount of carbon dioxide produced, you need to (1) convert grams C₃H₈ to moles C₃H₈ (via molar mass from periodic table), then (2) convert moles C₃H₈ to moles CO₂ (via mole-to-mole ratio via reaction coefficients), and then (3) convert moles CO₂ to grams CO₂ (via molar mass from periodic table). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The desired unit should be in the numerator. The final answer should have 3 significant figures because the given value (250. grams) has 3 sig figs.
Molar Mass (C₃H₈): 3(12.01 g/mol) + 8(1.008 g/mol)
Molar Mass (C₃H₈): 44.094 g/mol
1 C₃H₈ + 5 O₂ ---> 3 CO₂ + 4 H₂O
Molar Mass (CO₂): 12.01 g/mol + 2(16.00 g/mol)
Molar Mass (CO₂): 44.01 g/mol
250. g C₃H₈ 1 mole C₃H₈ 3 moles CO₂ 44.01 g
------------------ x ---------------------- x ---------------------- x -------------------- =
44.094 g 1 mole C₃H₈ 1 mole CO₂
= 749 grams CO₂
Answer:
Significant figures are a measure of <u><em>precision</em></u>.
Explanation:
The significant figures of a number are those that have a real meaning and, therefore, provide some information. Therefore, the set of digits that are known with certainty in a measure are called significant figures and are the digits of a number considered non-null.
Any experimental measurement is inaccurate and must be expressed with its significant figures.
In this way, significant figures express the precision of a measuring tool.
₇N¹⁴ + ₂He⁴ → ₈O¹⁷ + ₁H¹
The superscript for oxygen is 17.
Empirical formula of the compound contains 5 carbon atoms.
Explanation:
We have the molecular formula of the compound C₁₀H₂₂O₂.
To find the empirical formula we divide each number of atoms by the lowest number which is 2:
for carbon (C) 10 / 2 = 5
for hydrogen (H) 22 / 2 = 11
for oxygen (O) 2 / 2 = 1
The empirical formula is C₅H₁₁O and contains 5 carbon atoms.
Learn more about:
empirical formula
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Answer:
5 electrons
Explanation:
The atomic number of an element will tell you how many electrons it has in its ground state. The atomic number of boron is 5, therefore it has 5 electrons.
