Which reaction below represents the second ionization of sr?

a. sr (g) → sr⁺ (g) + e⁻

b. sr2⁺ (g) + e⁻ → sr⁺ (g)

c. sr⁺ (g) + e⁻ → sr (g)

d. sr⁻ (g) + e⁻ → sr2⁻ (g)

e. sr⁺ (g) → sr2⁺ (g) + e⁻?

What sex is the person who has the karyotype described in Steps 3-4? How do you know?

A cylinder with a movable piston contains a sample of gas having a volume of 6.0 liters at 293 K and 1.0 atmosphere. What is the volume of the sample after the gas is heated to 303 K, while the pressure is held at 1.0 atmosphere? (1) 9.0 L (3) 5.

Heat that flows by conduction is the transter of thermal energy between substances in contact. What must occur for this to happen? The two systems must be the same temperature, The two systems must not be touching each another.

The mean radius of the Earth is 6,371 km, and 70.8% of its surface is covered by water. What is the surface area of the Earth covered by land?

3 examples of electrochemical cell

Do substances have to be cold to freeze?

Which statement is true of the carbon atoms that make up a diamond? A. They can slip past one another slowly. B. They are always vibrating in place. C. They vibrate only when they are heated. D. They are locked in place and do not move at all.

A 48.3 mL sample of gas in a cylinder is warmed from 22 C, 87 C to 0.0 C what is the final temperature

Titration of 25.00 ml of an unknown hcl solution with 0.1550 m naoh starts at a buret reading for naoh of 0.33 ml. the phenolphthalein indicator turns light pink in the acid solution for over 30 seconds at a buret reading of 24.19 ml.

To what volume should you dilute 70 mL of a 10.0 MH2SO4 solution to obtain a 1.70 MH2SO4 solution?