30.0g of N_(2)CSH_(2)Cl is mixed with a 1.00L.solution of 0.100MN_(2)CSH. If 0.200 mol of NaOH is added, what will be the final pH? N_(2)CSHKb=6.1^ast 10^-6
What variable determines which "R" value you use in your calculation? moles (n) pressure (P) volume (V) temperature (T)
If E^circ (red) of a given half-cell is more negative than E^circ (red) for a standard hydrogen electrode, the half-cell will: A & tend to oxidize. B & tend to reduce. C & be at equilibrium. D & Not enough information is given.
Pb_(3)PO_(4) has a molar solublity of 3.0^ast 10^-23 What is the molar solubility in a solution of 0.0230MNa_(3)PO_(4) Answer
A container has 9.0 ml of liquid X with a density of 1200kg/m^3 How much liquid Y with a density of 1400kg/m^3 should be added to the flask so that the density of the liquid mixture is 1280kg/m^3 3.5 ml 6.0 ml 6.4 ml 8.7 ml
Question 26 (2 points) Which of the following will cause the rate of a reaction to increase? Decreasing reactant concentration Removing a catalyst Decreasing the temperature None of the above will increase reaction rate
Find the pH of a 0.0153 M solution of hypochlorous acid. (The value of K_(a) for hypochlorous acid is 2.9times 10^-8 Express your answer using two decimal places. pH=square
What does SDS stand for? Safety Data Sheets Standard Systems Solutions Saturated Diluted System Super Dynamic Suds
What is the name for BaCl_(2) A. Barium chlorine B. Monobarium dichloride C. Barium dichloride D. Barium chloride
What is the chemical formula for copper(II)phosphate? Cu_(2)PO_(4) CuPO_(4) Cu(PO_(4))_(3) Cu_(3)(PO_(4))_(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
