What is the molecular formula of a molecule that has an empirical formula of CH_(2)O and a molar mass of 120.12g/mol
State the number of valence electrons for each of the following elements. Sn square
What is the term for a pure substance that cannot be broken down any further by ordinary chemical reaction? homogeneous mixture element compound heterogeneous mixture none of the above
Which of the following groups of elements has the highest ionization energy? Group VIIA/17 Group VIIIA/18 Group IIB/12 Group IA/1 Group IIA/2
What is the current official name for element 108? hassium bohrium seaborgium dubnium none of the above
Which of the following is an example of a chemical change? charring sugar cooking a steak baking a pie boiling an egg all of the above
Which of the following is an example of a physical property? physical state melting point color crystalline form all of the above
What is the term for the weighted average mass of all the naturally occurring isotopes of an element? atomic mass atomic notation mass number atomic number none of the above
Which of the following is an inactive ingredient used as an occlusive skin protectant? Glycerin Lecithin Petrolatum Dimethicone
The solute particles that interfere with vaporization are: Select the correct answer below: in the middle of the solution at the surface of the solution in the gas phase none of the above
E What is the total atmospheric pressure if the partial pressures of $N_{2},O_{2}$ , and Ar are 6045 mm Hg. 162.8 mm Hg , 0.5 mm Hg. respectively?
What are the isotopes of lodine used for? Prevent tooth decay Plants and Agriculture Cancer Treatments Bone healing
There are more than 500 chemicals in marijuana, but about 100 of them are unique to the Cannabis plant, these are called cannabinoids. THIQs. opioids. butyrates.
d. What is the volume of 03620 mol He at STP?
Please answer in complete sentences: 5. What is the meniscus of a liquid and how does a scientist use the meniscus? __
Identify the correct chemical equation when copper(II) sulfate reacts with zinc to form zinc sulfate and copper? $CuSO_{4}+Zn\rightarrow Cu+Zn$ $CuSO_{4}+Zn\rightarrow ZnSO_{4}+Zn$ $CuSO_{4}+Zn\rightarrow CuSO_{4}+Zn$ $CuSO_{4}+Zn\rightarrow ZnSO_{4}+Cu$
Which of the following species can be Bronsted -Lowry acids? Check all that apply. $SO_{4}^{2-}$ D $I_{2}$ $Cl^{-}$ $H_{2}SO_{4}$ None of the above
What mass of carbon (in g) is present in $8.02\times 10^{23}$ formula units of $Al_{2}(CO_{3})_{3}$ $\square $
Which of the following is a common property of acids? Corrosive Conducts electricity All of these Sour taste
3. ¿Cuál es la masa molar de $K_{2}SO_{4}$ (2 puntos)
