B. Cell, organ. Cells make tissue and tissue make organ.
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Answer:
I think D but dont count on me
The number of moles contained in 39 L of F2 gas at STP is 1.74mol. Details on how to calculate number of moles can be found below.
<h3>How to calculate number of moles?</h3>
The number of moles of a gas at STP can be calculated using the following formula:
PV = nRT
Where;
- P = pressure
- V = volume
- n = number of moles
- R = gas law constant
- T = temperature
At STP, the following applies:
- T = 273K
- P = 1 atm
- R = 0.0821 Latm/molK
1 × 39 = n × 0.0821 × 273
39 = 22.41n
n = 1.74mol
Therefore, the number of moles contained in 39 L of F2 gas at STP is 1.74mol.
Learn more about number of moles at: brainly.com/question/14919968
Hello,
You balanced the equation and then you have to set up what is called a psychometric equation for each reactant so that you get the same unit for each in order to compare the two. so for (calcium hydroxide) = 78.5 g ÷ (40.1 + 32 + 2) = 1.0593 mol * Note: I just broke it down in my own science way..u can just get the molar mass of calcium hydroxide which is approx 74 g/mol
Hope this helps
Answer: Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity.