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saw5 [17]
4 years ago
8

___ is the sacrifice involved in making one decision over another

Chemistry
1 answer:
Scilla [17]4 years ago
4 0
Opportunity cost

Opportunity cost is the benefit, profit or value that could have been received or obtained but instead given up in favor of another alternative or course of action. Every situation has several alternatives and every resource has several alternative uses as well. Thus, every decision comes with it an opportunity cost. <span>
</span>
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White raven [17]

Answer:

D [polymers]

Explanation:

The joining of monomers (small molecules) is polymerization.

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3 years ago
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In a mechanical clock, the swinging of a pendulum causes the hands to move. The diagram shows the path of the pendulum as it swi
lesya [120]
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2. HBIO3 name this acid.​
aleksandr82 [10.1K]

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Hydroxy(oxo)bismuthine oxide

3 0
3 years ago
2Al + 6HCl --&gt; 2AlCl3 + 3H2 Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L
dem82 [27]

Answer:

8.8g of Al are necessaries

Explanation:

Based on the reaction, 2 moles of Al are required to produce 3 moles of hydrogen gas.

To solve this question we must find the moles of H2 in 11L at STP using PV = nRT. With these moles we can find the moles of Al required and its mass as follows:

<em>Moles H2:</em>

PV = nRT; PV/RT = n

<em>Where P is pressure = 1atm at STP; V is volume = 11L; R is gas constant = 0.082atmL/molK and T is absolute temperature = 273.15K at STP</em>

Replacing:

1atm*11L/0.082atmL/molK*273.15K = n

n = 0.491 moles of H2 must be produced

<em />

<em>Moles Al:</em>

0.491 moles of H2 * (2mol Al / 3mol H2) = 0.327moles of Al are required

<em />

<em>Mass Al -Molar mass: 26.98g/mol-:</em>

0.327moles of Al * (26.98g / mol) = 8.8g of Al are necessaries

7 0
3 years ago
A rock has a mass of 127 grams and displaces 32.1 mL of water. what is the density of the rock?
anzhelika [568]

Answer:

3.96 g/cm^3

Explanation:

5 0
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