Answer:
monomer
Explanation:
a single unit of a organic molecule is called a monomer
When 3.0 moles of hydrogen peroxide decompose at 1.0 atm and 23°C, approximately 36.78 liters of oxygen gas are produced according to the ideal gas law.
To find the volume of oxygen gas produced when 3.0 moles of hydrogen peroxide decompose at a pressure of 1.0 atm and a temperature of 23°C, you can use the ideal gas law:
PV = nRT
Where:
- P is the pressure (1.0 atm).
- V is the volume (what we want to find).
- n is the number of moles of gas (1.5 moles of O2 since 1 mole of O2 is produced for every 2 moles of H2O2).
- R is the ideal gas constant (approximately 0.0821 L.atm/mol.K).
- T is the temperature in Kelvin (23°C needs to be converted to Kelvin, which is 296.15 K).
First, calculate the number of moles of O2 produced:
n = 3.0 moles of H2O2 * (1 mole of O2 / 2 moles of H2O2) = 1.5 moles of O2
Now, plug in the values into the ideal gas law and solve for V:
1.0 atm * V = 1.5 moles * 0.0821 L·atm/mol·K * 296.15 K
Now, calculate the volume:
V = (1.5 moles * 0.0821 L·atm/mol·K * 296.15 K) / 1.0 atm
Calculate the volume:
V ≈ 36.78 L
So, the volume of oxygen gas produced when 3.0 moles of hydrogen peroxide decompose at 1.0 atm and 23°C is approximately 36.78 liters.
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The concept of significant figures are mainly used by scientist and engineer to know the significance of digits in a measurement. Therefore, significant figures gives an idea about the digits that are necessary to indicate the experimental value.
Significant figures are the figures that indicate the degree of accuracy of a value. It tells about the precision of a value.
Rules for counting significant figures are:
Number between 1 to 9 is always significant
Zeroes after a number has got no significance
Zeroes before a number has got no significance
Zeroes between number has got significance
34g 2significant figures
564l 3significant figures
19.3mm 3significant figures
23.45 mg 3significant figures
101 km 3significant figures
3400 g 2 significant figures
Therefore, significant figures gives an idea about the digits that are necessary to indicate the experimental value.
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B. -273
C. 273