Chemistry » Page 8

Chemistry

Saige Mack

Hen an electric current passes through liquid water, hydrogen gas passes accumulates at one electrode and oxygen accumulates at the other. Which of the following is true?

A) A physical change has occurred, with energy is being absorbed.

B) A chemical change has occurred, with energy being given off.

C) A physical change has occurred, with energy being given off.

D) A chemical change has occurred, with energy being absorbed.

Answer Answers (1)

Chemistry

Boyer

Explain what happens to water when heat energy is absorbed

a. Ice melts

b. Liquid water freezes

c. Water vapor condenses

Answer Answers (1)

Chemistry

Joanna Roy

Will fluorine form an anion or a cation? Why?

Answer Answers (1)

Chemistry

Koen Mahoney

An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has 1). More protons than neutrons 2). More neutrons than protons. 3) a total of 2 valence electrons. 4). A total of 8? valence electrons

Answer Answers (2)

Chemistry

Simone Meyer

When bases dissolve in water they release what type of negative ion?

Answer Answers (1)

Chemistry

Lang

An acid is added to water, and a new equilibrium is established. What is the system after the acid is added?

Answer Answers (1)

Chemistry

Isabelle Ferguson

The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm?

A. 7.7 degrees

B. 16.6 degrees

C. 6.6 degrees

D. 3.2 degrees

E. 19.2 degrees

Answer Answers (2)

Chemistry

Maximillian Steele

g write net ionic equations for the reactions of h2po4 - an amphiprotic ion with aqueous solutions of hcl koh

Answer Answers (1)

Chemistry

Harley Zhang

Eagles use sharp talons to grab fish from the water. What characteristic of life is this most directly an example of?

Answer Answers (1)

Chemistry

Humberto Lucas

Which of the following statements about rock and mineral resources is true

Answer Answers (1)

Chemistry

Felix Rodriguez

What are similarities between opinion based research and observation based research

Answer Answers (1)

Chemistry

Gauge Underwood

What does your circulatory system transport?

Answer Answers (2)

Chemistry

Hamza

What are the chemical components of a dna molecule?

Answer Answers (2)

Chemistry

Guest

Which type of reaction is described by the following equation? Na2O (s) + 2CO2 (g) + H2O (g) produces 2NaHCO3 (s)

Answer Answers (1)

Chemistry

Lilly Dawson

According to Hund's Rule, if you were filling the three orbitals at the 2p energy level, you would first put an electron in the 2px orbital, then in the 2py orbital, and then in the 2pz orbital; and THEN use any additional electrons to pair up (one at a time) with those electrons.

A. True

B. False

Answer Answers (1)