How many electrons are present if a bromine ion has a charge of - 1

How many centimeters are in 25 kilometers? A. 2.5 x 10 to the power of 6 B. 2.5 x 10 to the power of 4 C. 2.5 x 10 to the power of 3 D. 2.5 x 10 to the power of 5

Which of the following is called Energy of activation or Eact? A) The energy released during an exergonic reaction. B) The additional energy required for reactions to occur spontaneously. C) The energy consumed during an endergonic reaction

Which statement best describes a cell? A. A compartment that contains DNA and regulates when genes are turned on and off. B. the smallest structural and functional unit of organism can can be said to be alive. C.

A pharmacist wants to mix a 16% saline solution with a 26% saline solution to get 15 l of a 20% saline solution. how much of each solution should she use?

What is the standard atmospheric pressure

What is a neutron and what charge does it have

Examples of mechanical and physical weathering in our neighborhoods

Balance the redox reaction KMNO4 + NH3 - --> KNO3 + MNO2 + KOH + H2O

A representation that shows the distribution of geologic features in a given area

The process of evaporation describes which of the following changes of state? solid ➡ liquid gas ➡ solid liquid ➡ gas solid ➡ gas