A cell with an extracellular sodium ion concentration of 50mm and an intracellular sodium ion concentration of 100mm needs to move sodium from outside the cell into the cell. which of the following mechisms is likely involved.

According to the Arrhenius definitions of acids and bases, choose the acids from the list of acids and bases. Check all that apply. HBr Sr (OH) 2 HClO H2S LiOH

Which color has the highest frequency? Question options: Blue Yellow Purple Red

What are the half reactions of this redox equation Cu + HNO3 - - - > Cu (NO3) 2 + H2O + NO

There have been at least five mass extinction events on earth. True or False?

Examples of how to conserve fossil fuels?

Is a sample of liquid nitrogen more dense than a sample of nitrogen gas

You have a balloon containing 1 L of air at STP in a vacuum chamber. What will the volume of the balloon be when you reduce the pressure by half and increase the temperature to 373 K?

Which method will correctly determine whether the forces on an object are balanced or unbalanced? A. Multiply the forces in the horizontal direction by the forces in the vertical direction. B.

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.

Name a type of asteroid and give a description.