Describe how the contents of a cell are protected from the cell's environment

Which of the following determines the strength of the force and gravity between two objects? choose all that apply A) the speeds of the objects B) the masses of the objects C) the distance between the objects D) the volume of the objects

Which of the following is an electronic device that measures ph? a. a ph meter b. a molarity meter c. a hydroxide meter d. a hydronium meter

What process does a new substance form

When HBr combines with water, it produces H3O + and Br - ions. This shows that HBr is a base. true false

Which of the following is an exothermic reaction? A) dissolving ammonium nitrate in water to cool the water B) dissolving sugar in water C) melting ice D) oxidation of iron Which of the following is an exothermic reaction?

How do you explain the relativity high conductivity of tap water compared to a low or zero conductivity for distilled water

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed

Standard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Which compound is inorganic? a. glucose (c6hl2o6) b. carbon dioxide (co2) c. ethane (c2h6) d. stearic acid (cl8h36o2) ?

Pure aluminum metal has a density of 2.70 g/cm