What is flame over circle mean?

Which of the following is kept constant when using a bomb calorimeter?

What is the relationship between mass and weight? A. Mass and weight are the same B. weight is always greater than mass C. mass is always greater than weight D. weight is the effect of gravity on mass

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. Which kind of a change is seen in this process? ... a physical change ... a chemical change ... a nuclear change ...

What are isotopes? What are some examples of common stable isotopes?

In order for you to see an object, which of these must happen? A) Light reflected from the object's surface must enter your eyes. B) The object must have a shadow, for your brain to interpret what it is.

If you have 6 moles of CH4 how many moles of H2O can be produced

What is the definition of substance in your own words.

A 1.3 g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 86.9 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

In what applications might coal replace petroleum based fuel

How many molecules are in 7.5 mol of h2o