Sorry but i just need points hope you do good on your test
Is a because is the best answer better
A. Air, desk, water. sound travels the slowest through air and the fastest through liquids. solids are somewhere in the middle.
Answer:
2.9
Explanation:
9.7 / 3.33 = 2.912912912...
We need to round to the correct number of significant figures. 9.7 has two significant figures, and 3.33 has three significant figures. We need to round to the least number of significant figures available, so we round to two.
2.91 ≈ 2.9
<u>Answer:</u>
Mass of combined products = 20.4 grams
Mass of combined product and Erlenmeyer flask = 136 grams
<u>Explanation:</u>
By law of mass conservation, mass cannot be destroyed or created. So mass before reaction is mass after reaction.
Mass of lead(II) nitrate = 15.6 grams
Mass of potassium iodide = 4.8 grams
Mass of the Erlenmeyer flask = 115.6 grams
Mass of reactants = 15.6 + 4.8 = 20.4 grams
So mass of products = 20.4 grams
Mass of combined product and Erlenmeyer flask = 115.6 + 20.4 = 136 grams