# . Please help me with a chemistry question????

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. The space shuttle envrionmental control system handles carbon dioxdie (4% of exhaled air) by reacting with Lithium Hydroxide (LiOH) pellets to form lithium carbonate (Li2CO3) and water. if there are 7 astronauts on board the shuttle, and each exhale 20L of air per minute, how long could clean air be generated if there were 25,000g of lithium hydroxide pellets available for each shuttle mission (round to the nearest 10 minutes)? Assume the density of air is 0.0010g/ml

. The space shuttle envrionmental control system handles carbon dioxdie (4% of exhaled air) by reacting with Lithium Hydroxide (LiOH) pellets to form lithium carbonate (Li2CO3) and water. if there are 7 astronauts on board the shuttle, and each exhale 20L of air per minute, how long could clean air be generated if there were 25,000g of lithium hydroxide pellets available for each shuttle mission (round to the nearest 10 minutes)? Assume the density of air is 0.0010g/ml

##### 1 Answer

#### Answer:

The

#### Explanation:

**Step 1. Calculate the mass of #"CO"_2# treated**

**Step 2. Calculate the mass of air treated**

**Step 3. Calculate the volume of air treated**

**Step 4. Calculate the time required**

**Note**: The answer can have only one significant figure because that is all you gave for the percentage of carbon dioxide.

The best we can do is estimate the time to the nearest 10 h.