Explanation:
From the question it can be infered that initially only parent atoms were present in the rock and no daughter atom. So, initially there was only uranium atom and no lead atom. So, in total there were 500+1500= 2000 uranium atom. And no lead tom was there.
Intensive properties are useful for identifying a substance simply because these properties do not depend on the amount of sample, nor do they change according to conditions.
The correct answer choice which is a physical property of matter is boiling point.
Polymers are long chains of <u>molecules</u>
The method which I would use to separate two liquids with different boiling points is <u>distillation</u>
The particles are located in the nucleus of an atom are protons and neutrons
The type of molecular model which is used to represent very large molecules like proteins is ribbon diagram
The methods which is used to separate a mixture according to the size of the particles are filtration and chromatography
<h3>What is a mixture?</h3>
A mixture is a substance which contains two or more constituents which can easily be separated by physical means
So therefore, the methods which is used to separate a mixture according to the size of the particles are filtration and chromatography
Learn more about mixtures:
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Answer:
305 g of CO₂
3.77 × 10⁵ kJ
Explanation:
Let's consider the global reaction for photosynthesis.
6 CO₂(g) + 6 H₂O(l) → C₆H₁₂O₆(g) + 6 O₂(g) ΔHrxn = 2802.8 kJ
<em>A 1.70 lb sweet potato is approximately 73% water by mass. If the remaining mass is made up of carbohydrates derived from glucose (MW = 180.156 g/mol), how much carbon dioxide (MW = 44.01 g/mol) was needed to grow this sweet potato?</em>
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Let's consider the following relations:
- The potato is 100%-73%=27% glucose by mass.
- 1 lb = 453.59 g.
- 6 moles of CO₂ produce 1 mole of glucose.
- The molar mass of glucose is 180.156 g/mol.
- The molar mass of carbon dioxide is 44.01 g/mol.
Then, for a 1.70 lb potato:
<em>How much light energy does it take to grow the 1.70 lb. sweet potato if the efficiency of photosynthesis is 0.86%?</em>
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According to the enthalpy of the reaction, 2802.8 kJ are required to produce 1 mole of glucose. Then, for a 1.70 lb potato:
There are 4 significant figures
