What is a classified as an inner transition element?

- calcium

-copper

-fermium

-helium

Walter gets a paper back in lab with "-2.75% error" written on it. He found the mass of an object to be 100.7 grams. What should he have found as the mass of the object?

Which samples are substance? (A) HCI (aq) (B) NaCI (aq) (C) HCI (g) (D) NaCI (s)

Which of the following represent the keq value

Why does increasing the temperature of a reaction cause the reaction rate to increase? The potential energy of each particle increases. Increased energy enables more particles to collide.

Although the distance between the Earth and Sun varies slightly throughout the path of Earth's orbit, it has little impact on seasonal changes.

What is the term for the amount of salts in water? Evaporation Evaporation Salinity Thermocline Density

In an acid-base titration, of 20 ml of a m HCI solution with 1 m NaOH. How many ml of NaOH are needed

Which of the following is not a source of air pollution related to human activities

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?