20 Systems in nature tend to undergo changes toward (1) lower energy and higher entropy (2) lower energy and lower entropy (3) higher energy and higher entropy (4) higher energy and lower entropy

1. The vapor pressure of pure water at 85oC is 434 torr. What is the vapor pressure at 85oC of a solution prepared from 100g of water and 150 g of diglyme, C6H1403?

What is stationary in science?

How is the mole similar to a dozen?

Sound waves require a medium to travel through, such as a solid, liquid or gas because A) waves cannot move through a vacuum. B) sound only works within certain pressures. C) waves only work within certain temperatures.

Explain why is there no chemical equation to describe what happens when water evaporates?

What are the products of photosynthesis? A. Glucose and oxygen B. Oxygen, solar energy, and glucose C. Carbon dioxide, water, and solar energy D. Hydrogen, oxygen, and carbon

A sample of a substance that has a density of 0.824 g/mL has a mass of 0.421 g. Calculate the volume of the sample.

The tyndall effect is used to detect A: suspensions B:liquid solitions C:tyndalls D:colloida

Which of the following is not an empirical formula? A. C3H8O B. Sb2S3 C. C2N2H8 D. BeCr2O7

The molar heat of fusion for water is 6.01 kJ/mol. How much energy must be added to a 75.0-g block of ice at 0°C to change it to 75.0 g of liquid water at 0°C?