As ice melts and changes from solid to liquid, A) entropy increases. B) kinetic energy decreases. C) an exothermic reaction occurs. D) the random movement of molecules remains constant.

Why is a gas easy to compress

Where does oxidation occur in an electrochemical cell? (1) at the cathode in both an electrolytic cell and a voltaic cell (2) at the cathode in an electrolytic cell and at the anode in a voltaic cell (3) at the anode in both an electrolytic cell and

Which of these elements is unlikely to form covalent bonds? s, h, mg, ar, si?

Use these statements about valence electrons to answer the question. 1. All valence electrons are used to form bonds with other atoms or ions. 2. Bonding electrons are represented by a single dot in an electron dot diagram. 3.

Referring to the article, which of the following is associated with the use of genetic engineering to clone farm animals? A. There is controversy associated with cloning farm animals B. Cloning could improve the availability of food in some areas C.

What part of an atom has no relative mass

A scientist studies the DNA of three different species. The DNA from species A is more similar to DNA from species B than DNA from species C. Which species are probably the most closely related? Explain your answer.

Gamma rays are waves of energy that have no charge. true false

Describe what a polar covalent bond is and name a common compound that has a polar covalent bond holding it together

Part a:we can determine the purity of solid materials by using calorimetry. a gold ring (for pure gold, specific heat = 0.1291 j⋅g-1⋅k-1) with mass of 10.5 g is heated to 78.3 ∘c and immersed in 50 g of 23.