Which of the following chemical reactions best represent the general formation of acid rain in the atmosphere? Choose 2 answers: A O_(2)+Oarrow O_(3) B 2SO_(2)+O_(2)+2H_(2)Oarrow 2H_(2)SO_(4) 4NO_(2)+1O_(2)+2H_(2)Oarrow 4HNO_(3) D H_(2)PO_(2)+H^+arrow H_(3)PO_(2)
9. Given the balanced equation representing a reaction: 4NH_(3)+5O_(2)arrow 4NO+6H_(2)O How many moles of O_(2) are needed to produce 12.5 moles of H_(2)O Show all work and include units in your final answer. (3 points)
pH 7.42,PaCO226,HCO316 Answer: square
The process of injecting small amounts of air into the vial at a time to prevent leaking is called: Select one: Coring Decoding Milking Scooping
13. How many atoms of palladium (Pd) is 400 g of palladium? 14. Find the mass of 4.55times 10^28 atoms of vanadium (V). 15. Find the mass of 4.77times 10^22 atoms of scandium (Sc) 16. Find the number of atoms in 36 g of germanium (Ge).
A sample of salt water contains 9.5 grams of salt per liter. How much salt, to the nearest tenth of a gram,is there in the sample if the sample was 5 liters? square
14. Write the net ionic equation for the neutralization of HNO_(3) and KOH.
What is the correct net ionic equation for the precipitation reaction shown below? 2Cul_((aq))+H_(2)CO_(3(aq))arrow Cu_(2)CO_(3(s))+2HI_((aq)) 2H_((aq))^++2I_((aq))^-arrow 2HI_((aq)) 2Cu_((aq))+CO_(3(aq))arrow Cu_(2)CO_(3(s)) 2Cu_((aq))^++CO_(3)^2-_((aq))arrow Cu_(2)CO_(3(s)) Cu_((aq))^++CO_(3)^2-_((aq))arrow Cu_(2)CO_(3(s))
Parts per million is used to express the 1. atomic mass of an element 2. concentration of a solution 3. volume of a substance 4. rate of heat transfer 1 2 3 4
1 Numeric 10 points What is the percent by mass of Cl in Fe(ClO_(3))_(3) Round your answer to the hundredths place. Answer square
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.
