Which of these electrons is a halogen?

Potassium (k)

Calcium (ca)

Vanadium (v)

Gallium (ga)

Bromine (br)

Which of the following statements about noncovalent interactions are true? Charge-charge interactions (salt bridge, ionic bond) are electrostatic interactions between a pair of ions.

What energy is changed to cell energy in stage 1 of photosynthesis. true or false

A compound with the empirical formula CH2 has a molar mass of 126g/mol. What is the molecular formula for this compound?

What is true at STP? a. Temperature is 273.15 Kelvin. b. One mole of gas occupies one liter of volume. c. Pressure is 101 atmosphere. d. Volume is 4.2 liters.

How will the changes listed affect the position of the following equilibrium? 2 NO2 (g) 4 NO (g) 1 NO3 (g) a. The concentration of NO is increased. b. The concentration of NO2 is increased. c.

According to the graph, which activity has used the largest amount of water over the past twenty years?

Tiffany leaves balloons filled with helium gas inside her car in on a sunny day when she returns to her car some some of the balloons are much larger and a few have popped explain what happened

If the pH indicator bromothymol blue was added to the nitric acid solution, it's colour would be?

Which statement describes a chemical reaction? Atoms in the products are rearranged to form new substances. Atoms in the reactants are rearranged to form new substances. Atoms in the products change into new atoms to form new substances.

The gases CO₂ (g) and NH₃ (g) can be liquefied at 20°C by compressing them to sufficiently high pressures. A student claims that NH₃ (g) can be liquefied at a lower pressure than CO₂ (g) can be liquefied.