The gram-formula mass of citric acid is 3(1)+6(12)+5(1)+16(7)=192 g/mol.
This means that in 13.00 grams of citric acid, there are 13.00/192 = 0.067 moles.
From the equation, we know that for every 1 mole of citric acid that is consumed, 3 moles of carbon dioxide are produced.
This means that there are 3(0.067)=0.203 moles.
Since the gram-formula mass of carbon dioxide is 12+2(16)=44 g/mol, meaning it has a mass of 0.203(44)=8.93 g
To solve this kinematics formula use the following equation:
Vf = Vi + at
Vf = 0 + (9.81 m/s^2)(3 seconds)
Vf = 29.43 m/s and or about 29.4 m/s of reported to 3 significant figures.
To obtain more accurate values of the densities of the pennies:
- more trials can be conducted to reduces the effect of measurement errors
- more care should be taken in taken volume measurements by displacement of water to avoid splashing of water.
<h3>What is density of a substance?</h3>
The density of a substance is the ratio of the mass of the substance to the volume of that substance.
It is a measure of the compactness of the matter in a substance.
The densities of the pennies made before 1982 was 8.7 g/ml
The actual density of pennies made before 1982 is about 8.8 g/mL.
The densities of the pennies made after 1982 was 6.9 g/ml
The actual density of pennies made after 1982 is about 7.2 g/mL.
Due to several random and experimental errors, the values obtained from the experiment are not exactly the same with the accepted values.
To obtain more accurate values:
- more trials can be conducted to reduces the effect of measurement errors
- more care should be taken in taken volume measurements by displacement of water to avoid splashing of water.
In conclusion, the densities varied as as a result of random and experimental errors.
Learn more about density at: brainly.com/question/1354972
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Answer:
Nickel(II) cyanide is an inorganic compound with a chemical formula Ni(CN)₂
Explanation:
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<span>a) cation on left, anion on right b anion on left, for example NaCl.</span>
