Which of the following could result from a substance that undergoes a physical change?

a) Its chemical composition is altered.

b) It has an irreversible change.

c) It forms a new substance.

d) Its shape is altered.

When using the ideal gas constant value, R = 0.0821, in an ideal gas law calculation, the units of pressure may be expressed in units of atmospheres or kilopascals. TRUE FALSE

The phase of matter where particles at extremely high temperatures become ionized.

Which of the following reasons best explains why a scientist would want to replicate Gregor Mendel's pea plant experiment? A. to discover new aspects of the natural world B. to test the predictions of current theories C.

2no2 (g) ⇌n2o4 (g) kp=6.7at298k a 2.35-l container contains 0.053 mol of no2 and 0.084 mol of n2o4at298k. is the reaction at equilibrium? if not, in what direction will the reaction proceed?

Calculate the ph of a 0.060 m carbonic acid solution, h2co3 (aq), that has the stepwise dissociation constants ka1 = 4.3 * 10-7 and ka2 = 5.6 * 10-11.

List one reason as to why historical growth has slowed in recent years.

Name some specific liquids that you think might contain less than 80 percent water.

The ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. in the first step of the ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water.

Convert 6.766 * 10 ms into s

How much CO2 is produced from 10g of CH4?