The size particles in a solution is about 1nm (1nm = 0.000000001 m). Write 0.000000001m in scientific notation.

When 0.1523 g of liquid pentane (CH) combusts in a bomb calorimeter, the temperature rises from 23.7C to 29.8 C. What is U for the reaction in kJ/mol pentane? The heat capacity of the bomb calorimeter is 5.23 kJ/C.

Even if a a large force is exerted on an object, no work is performed if

Why does pumping a soccer ball with an air pump increase the pressure inside the ball? the pump puts more gas particles inside the ball. the pump changes the gas particles into different substances. the pump increases the volume of the ball.

The speed of sound in air is about 340 meters per second. How long does it take a sound wave to travel a distance of 7800 meters

Which of the following is an example of a compound C2, O2, He2, CO2?

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present

Danilo is sliding down a slide. What forces are acting on him as he slides

If you want your investment or savings account to be easily turned into cash without losing its value, you should consider the?

What is the definition of "gravitational potential energy"?

A number of food chains linked together