General Chemistry Answers

1. A closed flask contains gas at STP (273K, 76 cmHg). If the temperature is raised to 400K what will the pressure be in mmHg?

Assume that after you made your measurements, you realized that your solid rod had a nick in the side and a portion was missing. When comparing the density that would be calculated using the ruler method with the result of the displacement method of the rod, would the calculated density for the ruler method be higher, lower or the same as the water displacement density? Explain.

if you are given the formula 2C8H18 + 25O2 --->16O2 + 18H2O

If 255.0g of Octane and 1510.0g of Oxygen are present, determine which reagent is limiting

What volume (mL) of 0.025 M HNO₃ is necessary to titrate 19.6 mL of 0.042 M Ca(OH)₂ solution to the endpoint?

The smell of a burning match is due to the formation of sulfur oxides. The relevant reaction is S + O₂ → SO₂. If 4.8g of sulfur is burned in this manner, what mass of sulfur dioxide is produced?

What is the atomic number if mass #=144, p=60, e=60?

Calculate the heat change in kilocalories for condensation of 6.5 kg of steam at 100 ∘C.