16.56 If solution of HF (K_(a)=6.8times 10^-4) has a pH of 3.65, cal- culate the concentration of hydrofluoric acid.
What kind of bonding exists in substances that consist of discrete molecules? ionic covalent hydrogen bonding intermolecular
tert-butylamine has a pKa of 10.83. At what pH will t-butylamine have a charge and what will the charge be? pH 12, +1 pH 1, -1 pH7, +1 pH 1, +2
Which term refers to the number of protons in an atom of an element? atomic number period average atomic mass symbol
Choose the proper coefficients for each substance to balance this equation. underline ( )C_(2)H_(4)(g)+underline ( )O_(2)(g)arrow underline ( )CO_(2)(g)+underline ( )H_(2)O(g) 2,3,4,2 2.2.4.2 1,3,2,2 1,1,2,2
Which polyatomic ion formula and name is NOT correctly paired? 1. CN^- cyanate 2. NO^- nitrate 3. ClO^- chlorate 4. SO42^- sulfate 5. CrO42^- chromate
Each year, the science club puts on a science show for the stud demonstrations to show properties of metals. For one property pin. Which property of metals is Luis most likely going to demonstr luster opacity conductivity malleability
The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56.Which comparison is best supported by this information? They are in the same group because they have similar atomic masses but they are in different periods because they have different chemical properties. They are in the same group because they have similar chemical properties but they are in different periods because they have very different atomic numbers. They are in the same group because their atomic numbers are each multiples of four, but they are in different periods because they have different chemical properties. They are in the same group because they have similar atomic masses but they are in different periods because they have very different atomic numbers.
Consider the following unbalanced equation: N_(2)(g)+H_(2)(g)arrow NH_(3)(g) How many moles of H_(2) will be required to react exactly with 3.83 mol N_(2) HOW DO WE GET THERE? What is the balanced equation for this reaction (in lowest multiple integers)? square N_(2)(g)+square H_(2)(g)arrow square NH_(3)(g)
__ is/are types of chemical reaction. Synthesis reaction Redox reaction Precipitation reaction All of the choices
When you balance the Separate Water simulation how many individual oxygen atoms do you need on the products side to complete the balanced equation? 1 2 3 4
Determine which type of property each statement describes by typing "physical or "chemical" in the blank. Hydrogen is a colorless tasteless, and odorless gas. $\square $ Hydrogen is very combustible in the presence of oxygen. $\square $ Hydrogen is very reactive with most elements. $\square $ Hydrogen is the least dense of all elements. $\square $
Which of the following is an empirical formula? $C_{3}H_{6}$ $C_{3}H_{8}$ CH $C_{2}H_{4}$
Which of the following has the most mass per mole? Oxygen Nitrogen Carbon Potassium
What is the electron configuration for oxygen, O? $1s^{2}2s^{2}2p^{3}$ $1s^{2}2s^{2}2p^{6}3s^{2}$ $1s^{2}2s^{2}2p^{4}$ $1s^{2}2s^{2}2p^{6}3s^{2}$
Gasoline, paints, thinners solvents, natural gas acetylene are all examples of potential: A. Toxic hazards. B. Flammable hazards. C. Combustible hazards. D. All of the above. E. None of the above.
Trans fats and partially hydrogenated oils are the same thing. False True
Is this compound ionic or covalent? $NO_{2}$ ionic covalent
(b) $H_{3}C-CH-CH_{2}-CH_{2}-CH_{3}\\ H_{2}C-CH_{3}$ 2-Ethylpentane Spell out the full name of the compound. The correct name is $\square $
Question 2 (Multiple Choice Worln 2 Points) (05.01 LC) Which of the following groups have seven valence electrons and are very reactive? Column 1 alkali metals Column 2 alkaline earth metals Column 17 halogens Column 18 noble gases
