Convert the following measurement. 4.9times 10^-7(mol)/(gcdot cm^2)=square (mol)/(kgcdot m^2)
Pure silver has a density of 10.53g/cm^3 What is the mass of a piece of silver that has a volume of 17.04cm^3 multicolumn(6)(|c|)( g ) Basic & Funcs & Trig & & & & square & x^square & x_(square) & sqrt(} & sqrt[n]{ ) & uparrow & downarrow
What is the mass in grams of 5.7times 10^25 formula units of aluminium sulfate? square
Why can't you see some of the reactions? They are producing a gas. They produce water, a soluble salt, an acid or a base. They are being neutralized. They are not reacting.
Discrete energy levels that contain the electrons of an atom are called __ orbital energies energy shells electronegativities ion rings
Find the pOH for the following: 735 L of a solution containing 0.34 moles of nitric acid. (find Molarity first) 4.63 10.67 3.33 2
What are the characteristics of a primary standard? It must be reasonably soluble. It must have a reasonably high molar mass. It must have a reasonably low melting point. It must react rapidly with the substance being standardized in a known stoichiometry. It must react with the substance being standardized in an exothermic reaction.
What temperature (in^circ C) did an ideal gas shift to if it was initially at -10.2^circ C at 4.61 atm and 39.0 L and the pressure was changed to 3.0 atm and the volume changed to 40.78 L? Enter a numeric answer with 1 place after the decimal. Answer square
Commercially pure coppers are __ Select one: a. hard b. very ductile c. strong d. all of the above
49. Us ng the molecular orbital model, write electron configurations for the following diatomic species and calculate the bond orders . Which ones are paramagnetic? a. Li_(2) SHOW ANSWER b. C_(2) SHOW ANSWER C. S_(2)
Explain why the valence electrons are important in determining the chemical properties of an element. They are involved in chemical bonding. They determine the element's color. They determine the atomic mass. They are located in the nucleus.
8. Arrange the following molecules in order of increasing boiling points: $CH_{4},CO_{2},HF,NaCl,Kr,PH_{3}$
4x A chemical reaction for the reaction of Sodium Hydroxide $(NaOH)$ and Hydrochloric Acid (HCl)is shown. The masses of some of the reactants and products are given in grams. $NaOH+HCl\rightarrow NaCl+H_{2}O$ 16g 24912g ? How many grams of water were produced in the reaction? A 189 B 289 C 409 D 529
3. In the lab what was the mass of the steel wool after burning? 1.5149 1.426 g 23479 2.7649 4. Why does steel wool burn, but not an iron rod? The steel wool increased the surface area between reactants, which increased the rate of reaction. The steel wool decreased the surface area between reactants, which decreased the rate of reaction. 5. Why does the steel wool weigh more after the reaction? because oxygen was added during the reaction. it didn't weigh more because energy was created
1. What factors affect reaction rates? Mark all that apply the surface area of reactants the temperature of systems the concentration of reactants presence of a catalyst color of the reactants In the lab , what was the mass of the steel wool before burning? 1.426 g 2.571 g 5.328 a
Marie is learning about the differences between physical and chemical changes in her physical science cuss Which of the following of the house of everyone is occurred? Having a sliced apple turn brown when exposed to air due to oxidation is a physical change Because a new substance has not formed you stall have an appe Heating a piece of metal in a furnace until it glows brightly is a chemical change because the color and appearance of the metal has changed Adding sugar crystals to water to form a clear, colorless liquid is a physical change because the sugar crystats can be separated from the lagued and returned b It's engineer lives. Heating a block of ice to form a liquid is a chemical change because the state of matter has changed from a solid to a bqux1.
Balance cherical reaction equalions Determine mole ratios from a balanced chemical maction equation. Vatue: 4 Seled the comed coeficient to balance the chemical reaction below. $Mg(s)+O2(g)-2MgO(s)$
3. Whattype of resction occure during this experiment? double replacement oxidation reduction (redox) reversible none of the above
Biochemistry A Final Exam Answer the following questions using the drop down menus below: What force makes protons not want to be together? $\square $ Is this force attractive or repulsive? $\square $ Nuclear Force
Aqua Sci Fall MidTerm 2023 A Thinking about how chlorine ne is added to tap water to disinfect the water, what does the quote "The dose makes the polson" mean"? some substances can be toxic/harmful if used in large amounts but may not be toxic/harmful in small amounts 6 $\square $ the poison is about the substance, not the amount $\square $ no one should drink chlorine no matter how small the amount $\square $ waler is water, doesn't matter what dose of substances are in the water POSSIBLE POIN
