Answer:
B?
Explanation:
In the example, the amount of hydrogen is 202,650 x 0.025 / 293.15 x 8.314472 = 2.078 moles. Use the mass of the hydrogen gas to calculate the gas moles directly; divide the hydrogen weight by its molar mass of 2 g/mole. For example, 250 grams (g) of the hydrogen gas corresponds to 250 g / 2 g/mole = 125 moles.
A: making s sandcastle. This is because water and sand is only a mixture, so they do not react with each other. All the rest include chemical reactions!
Energy transformations are the processes by which one form of energy is converted to another form.
<h3>What are energy transformations?</h3>
Energy transformations refers to the various ways in which different forms of energy are interconverted.
The given energy transformations are as follows:
- Microwaving popcorn: electromagnetic energy to thermal energy
- Water flowing over a waterfall: potential energy to kinetic energy
- Eating an apple: chemical energy to mechanical energy
- Using an iron: electrical energy to heat energy
- Turning on a car: chemical energy to mechanical energy
- Using a flashlight: chemical energy to light energy
- Fireworks on the 4th of July: chemical energy to light energy
- Turning on the light: electrical energy to light energy
- Playing the drum: mechanical energy to sound energy
- Eating a snack before a run: chemical energy to potential energy
- Making toast in the toaster: electrical energy to heat energy
- Turning on a car radio: electrical energy to sound
- The Sun: nuclear energy to light
- Plant photosynthesis: Light energy tp chemical energy
Therefore, energy transformations are the processes by which one form of energy is converted to another form.
Learn more about energy transformations at: brainly.com/question/961052
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False ,ionic compounds have<span> higher melting and </span>boiling points<span>.</span>