What makes a good scientific question??? Plsss help! I will give brainliest! :)
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I'm assuming that you meant 55 g/cm^3. Density=
. This is the definition of density. If you rearrange this equation by multiplying each side of the equation by the volume, you get: (Density)(Volume)=Mass. Divide each side by the density to get: Volume=Mass/Density. Now just plug everything in:
V=220 (grams)/55 (grams/cm^3)=<u>4 cm^3</u>
V=220 (grams)/55 (grams/cm^3)=<u>4 cm^3</u>
Answer: The sample that contains the greater number of molecules is water.
Explanation: To calculate the number of molecules, it is used the Avogadro's number ( particles/molecules). So, considering that the mass to water and carbon dioxide is 1g (it can be any other number), the relationship between moles and molar weight is:
To water: = 0.05 moles.
Therefore,
1 mol ---- molecules
0.05 moles ---- x
x = molecules of water.
To carbon dioxide: = 0.02 moles.
Therefore,
1 mol ---- molecules
0.02 moles ---- y
y = molecules of carbon dioxide.