Answer:
The mass of 3.13*10²³ molecules of carbon dioxide is 22.88 g.
Step-by-step explanation:
Avogadro's Number or Avogadro's Constant is the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and it applies to any substance.
Then you can apply the following rule of three: if 6.023*10²³ molecules are present in 1 mole, 3.13*10²³ molecules are present in how many moles?
moles= 0.52
Since the molar mass of carbon dioxide is 44 g / mole, then the following rule of three can be applied: if there are 44 g in 1 mole, how much mass is there in 0.52 moles?
mass= 22.88 g
<u><em>The mass of 3.13*10²³ molecules of carbon dioxide is 22.88 g.</em></u>
Answer:
Step-by-step explanation:
That means that the number must end in 2 or 8 to be divisible by 2.
Because the number must be between 7000 and 8000 the only number it can start with is 7
With those clues in mind, we can write
1 * 2 * 1 * 2. It doesn't say if we can use a number more than once. I am assuming not. We should get 4
7 2 5 8
7 5 2 8
7 5 8 2
7 8 5 2
Egg McMuffins are 300 calories and the hash browns are 150 calories.
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Answer:
Hope this helps
Step-by-step explanation:
When new substances are produced in a reaction we say a chemical change has occurred. These changes are very difficult, sometimes impossible, to reverse.
Atoms are not created or destroyed in a chemical reaction, they are just rearranged from the reactants to form the products. This is the reason why symbol equations must be balanced.
If a chemical reaction is completed in a closed system (when nothing extra can get in and nothing can escape), then the mass will remain constant. But, if the chemical reaction happens in an open system (where air can get in and out), then mass may appear to change.
In this simulation we will explore the mass changes in chemical reactions and endeavour to explain why they have occurred.
