Which aqueous solution is the best conductor of an electrical current? 1. 0.1 M NaNO_(3) 2. 0.2 M NaNO_(3) 3. 0.01 M NaNO_(3) 4. 0.02 M NaNO_(3)
Which compound below is a hydrocarbon? CH_(3)CH_(3) CH_(3)COOH CH_(3)I CH_(3)OCH_(3)
Drag each mineral to the correct location to indicate whether it is used in smartphone screens or smartphone batteries. (2 points) & multicolumn(2)(|c|)(Screening the) & multicolumn(3)(|c|)(Batteries)
11. How does the Law of Conservation of Mass apply when vinegar and baking soda react in a closed system? 12. What products are formed in the reaction Cu+AgNO_(3)arrow Ag+Cu(NO_(3))_(2) 13. What does a combustion reaction in a vehicle typically produce? 14. What happens to the gravitational force between two objects when the distance between them is cut in half? 15. What two things affect how objects respond to a charged balloon in static electricity experiments?
How many individual atoms make up a molecule of methane?(type a number) square Question 4 How many different elements are used to make a molecule of methane? (type a number) square 1 pts
Predict the products for the this reaction: K+HClarrow Edit View Insert Format Tools Table square
What is the heat change when 4.72 g of Carbon reacts with excess O_(2) according to the following equation? Delta H=square kJ C+O_(2)arrow CO_(2) Delta H^circ =-393.5kJ "Report your answer with a positive sign (+) or negative sign (-) and to the appropriate number of significant figures. Is this reaction endothermic or exothermic? square
flip-flops, sandals,shorts, and long hair are prohibited in the lab. A True B False
Use your periodic table determine which element does not belong together with the rest. 1 Li,Be,Al,Nb,F 2. Ar,Rn,Se ,Si, He 3. I Rb,K,Ca,Sc , Te 4. Si,Ga,Ge , B, Sb 5. . Hg, I, In, Pt , Sn
1. In which of the following situations does a new substance form? Water evaporates from a glass of salt water A piece of wood burning on the fire Sugar is dissolved into a cup of tea A piece of bread is cut in half
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.
