1) How do I calculate what the mass would be for the flask containing water and alkaseltzer if:

-mass of flask and the 10ml of water equals 150.23g
-mass of alkaselzer equals 0.65g

Calculate the mass of the carbon dioxide gas if:
-mass of flask , water , and alkaseltzer remains at the end of the experiement equals 150.43g ( using the answer in #1)

Calculate the density of the carbon dioxide gas if:
- the volume of water added to the 250ml flask at the end of the experiement was 132.3ml

mass flask + H2O = 150.23

mass alkaseltzer = 0.65g
Total mass flask + H2O + alkaseltzer is
150.23 + 0.65 = ?

To calculate the mass of the flask containing water and Alka-Seltzer:

1) Start with the initial mass of the flask and the water, which is 150.23 grams.
2) Subtract the mass of the flask, which is known as 150.23 grams.
3) Subtract the mass of the Alka-Seltzer, which is 0.65 grams.

After performing these calculations, you will find the mass of the flask containing water and Alka-Seltzer.

Now, to calculate the mass of the carbon dioxide gas:

1) Start with the final mass of the flask, water, and Alka-Seltzer, which is 150.43 grams.
2) Subtract the mass of the flask containing water and Alka-Seltzer that we calculated in the previous step.

After applying these steps, you will obtain the mass of the carbon dioxide gas.

Lastly, to calculate the density of the carbon dioxide gas:

1) Begin with the volume of water added to the flask at the end of the experiment, which is 132.3 milliliters.
2) Convert the volume from milliliters to liters by dividing by 1000.
3) Determine the density of carbon dioxide gas by dividing the mass of the carbon dioxide gas (calculated in the previous step) by the volume in liters.

By following these steps, you will obtain the density of the carbon dioxide gas.