State the law of superposition

Select all that apply to diffusion. A solid cannot diffuse in to another solid. Solids can diffuse in liquids. Liquids can diffuse in liquids. It is the process of intermingling atoms from one substance into another.

Number of valence electrons in sulfur

If 50% of a radioactive element remains after 4000 years what is its half-life?

Which of the following correctly describes an Arrhenius acid? A. It accepts a lone pair of electrons. B. It donates a proton. C. It produces OH in solution. D. It produces H * in solution.

Hof metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes?

What is the correct value for Avogadro's number? A. 6.022 x 10^23 B. 6.023 x 10^22 C. 6.022 x 10^33 D. 6.022 x 10^2.3 E. none of the above

Fossil fuels are considered useful to humans because they are

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei

An atom that has 13 protons and 15 neutrons is an isotope of the element? How can I count it?

Which element is nuclear fusion least likely to produce? hydrogen, which has an approximate mass of 1 chlorine, which has an approximate mass of 35 argon, which has an approximate mass of 39 silicon, which has an approximate mass of 28 I know the