Question 6 of 32 In the Lewis structure for a molecule of ethylene (C_(2)H_(4)) how many electron dots are shared between carbon atoms that are joined by a double bond? A. 8 B. 4 C. 2 D. 6

Question 1 of 32 What is the noble gas configuration for tellurium (Te)? The Periodic Table A. [Xe]5s^25p^65d^8 B. [Kr]5s^25p^65d^8 C. [Xe]5s^24d^105p^4 D. [Kr]5s^24d^105p^4

Question 11 of 32 How did the methods of alchemists differ from the methods of early chemists? A. Chemists did not try to discover new materials. B. Chemists did not study gold or other metals. C. Alchemists did not use experiments to find evidence. D. Alchemists did not make observations.

Mixtures can be separated by physical changes. Please select the best answer from the choices provided T F

What is the smallest unit of an element that retains its chemical properties? a. Proton b. Atom c. Molecule d. Ion

Which of the following gas diffuses faster? a. Propane b. Ethane c. Hydrogen d. Methane

The color of hair is an example of __ physical property physical change chemical change chemical property

Why is burning wood a chemical change? The wood can still be seen It evaporates easily It becomes a new substance with different properties It creates a solution

Identify the semi-solid solution. Mayonnaise Saltwater Brass Air

Why is saltwater a homogeneous mixture? Because salt floats Because the salt forms a compound Because it is uniform and components are not easily distinguished Because it is a gas

Hot Questions

An element cannot be broken down by chemical means. True False

Why is vaporization classified as a phase change? It forms ash Identity changes It is reversible and involves state change It forms new compounds

Which of the following statements about a catalyst is true? A catalyst accelerates a reaction by lowering the energy of activation. A catalyst accelerates a reaction by raising the energy of activation. A catalyst accelerates a reaction by changing the amount of reactant and product at equilibrium. A catalyst accelerates a reaction by lowering the equilibrium constant.

The compound $2,4,6$ trimethylheptane has how many chiral centers? o 3 1 4

Complete the atomic orbital diagram for the ground-state electronic configuration of phosphorus. $\square $ $\square $ $\square $ $\square $ $\square $ $\square $ $\square $ $\square $ $\square $

13. Base your answer to the following question on the balanced equation below. $2Na(s)+Cl_{2}\rightarrow 2NaCl(s)$ Explain, in terms of electrons, why the bonding in NaCl is ionic.

Which of the following types of compounds can form hydrogen bonds with itself? Alcohols ethers alkenes

Mixtures can be separated by physical changes. Please select the best answer from the choices provided T F

Which among the following is a chemical change? Reactivity Melting Cutting Freezing

Part F $CH_{3}CH_{2}CHCl\\ \downarrow \\ CH_{3}$ Spell out the full name of the compound.