Which of the following is most likely to exhibit covalent bonding? CaCl_2 Cs_2O

Question

Which of the following is most likely to exhibit covalent bonding? CaCl_2 Cs_2O CO_2 NaF NaCl The law of definite proportions states that ____________ the elements forming a given compound always react in the same proportions. compounds such as NO and NO_2 have identical chemical properties. compounds such as NO and NO_2 must have masses that are whole-number multiples each other. only one compound can be produced when two elements combine. nitrogen and oxygen can combine to form a variety of compounds, such as NO or N Which of the following is the SI base unit for mass? kg lb g m mg Identify the base in the following acid-base reaction. H_2PO^-_4..(aq) + H_2O(l) rightarrow HPO^2-_4(aq) + H_3O^+(aq) H_2O H_3O^+ You can't determine without a titration This is not an acid-base reaction. H_2PO^-_4 Which of the following lasers emits photons with the lowest energy? an Ar^+ laser with lambda = 514.5 nm a Nd: YAG laser with lambda = 1064 nm a He-Ne laser with lambda = 633 nm ArF laser with lambda = 193 nm an Kr^+ laser with lambda = 647 nm Which of the following statements about energy, systems, and surroundings is NOT true? The system can do work on the surroundings. The surroundings can provide thermal energy to the system. The system can be a chemical reaction that occurs in a sample of matter. The system is the part of the universe that is the focus of thermochemical study. The surroundings experience the same energy change as the system in order to keep total energy in the universe constant. Bond length and bond strength are_______________ arbitrary. unrelated. identical. directly proportional. inversely proportional. Which type of bonding involves the sharing of valence electrons by two atoms? polar ionic metallic covalent ionic intramolecular

Explanation / Answer

Ans 7 (c) CO2 exhibit covalent bonding, there is double bond between C and O atom and makes the structure linear.

Ans 8 (a) The element forming a given compound always react in a definate proportion.

Ans. 9 (a) SI unit of mass is Kg

Ans 10 (a) H2O acts a base and abstract the H+ and form H3O+.

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