What is the process in which coal is heated in the absence of air? Name the process.

Which of following statements is true about scientific knowledge? Scientific ideas are not subject to change, so scientific knowledge stays the same. Scientific knowledge is constantly evolving as new observations are made.

You weigh a dry flask, and place a chunk of solid into it, then weigh it again. You then fill the flask to the top with water and weigh the full flask. Finally, you take the solid out, fill the flask to the top with water and weigh it once more.

Are viruses alive? discuss why or why not.

Investigating iron thiocyanate requires several chemicals which must be used with caution. Using knowledge of these chemicals, select whether the following statements are true or false.

List and describe the steps of energy transfers that occur that allow a digital recording to be played through a speaker and ultimately become sound waves.

Why is particle size important in a heterogeneous catalyst

In a scientific experiment, the one variable that is purposely changed to test a hypothesis is called the manipulated variable. true or false

Consider separate 100.0-g samples of each of the following: nh3, n2o, hcn, n2h4, and hno3. which of the samples has the greatest mass of nitrogen?

How many grams of iodine are needed to prepare 28.6 grams of ICl

How do the himalayan mountains affect the people of india