What is number of protons in the nucleus of each atom of an element?

7. The equilibrium constant Kc for the reaction H2 (g) + I2 (g) ⇌ 2 HI (g) is 54.3 at 430°C. At the start of the reaction there are 0.714 moles of hydrogen, 0.984 moles of iodine, and 0.886 moles of HI in a 2.40-L reaction chamber.

New evidence can lead to a change in scientific knowlodge true or false

2. The temperature of CO2 gas at 99.3 mmHg was measured at 455 K. What will be the new temperature if the pressure is adjusted to 202.6 mmHg? Assume constant volume.

A skateboard is pushed up a hill with a 90 N force to the left and experiences a gravitational force of 100 N to the right. (A) Will accelerate to the left (B) Will accelerate to the right (C) Will not accelerate

What do scientists suspect the core might be made of?

A noncompetitive inhibitor. binds to the active site of an enzyme a. b. increases the rate of enzyme action alters the primary structure of the enzyme c. d. none of these

True or false? The radioactive wastes produced by nuclear fission remain dnagerous for dozens of years

Determine the number of moles of Krypton contained in a 3.25 liter gas tank at 5.80 atm and 25.5 °C.

In the reaction 2co (g) + o2 (g) â 2co2 (g), what is the ratio of moles of oxygen used to moles of co2 produced? select one:

A log's mass is 5 kg. After burning, the mass of the ash is 1 kg. Explain what may have happened to the other 4 kg of mass.