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Q: In the electrochemical cell shown here, the concentrations of Mn2+ and Cr3+ are 1.5x10-5 and 0.25 mo...

A:

Q: 54 Draw the Fischer projection of the product of the oxidation of the monosaccharide D-talose at C1....

A:

Q: The density of lithium metal is 535 kg/m3 . What is this density in g/cm3?a) 0.000535 g/cm3b) 0.535 ...

A: 1 kilogram=1000 grams 1 meter=100 centimeter

Q: Which quantity in each pair is larger? a. 5 mL or 5 dLc. 5 cm or 5 mm b. 10 mg or 10 μgd. 10 Ms or 1...

A: Convert the suitable quantities into similar and units and then compare each unit in a pair.

Q: A patient is prescribed 1.25 g of amoxicillin, which is available in 250-mg tablets. How many tablet...

A: Conversion of unit  1 g = 1 x 103 mg Total mass of amoxicillin needed = 1.25 g = 1.25 x 103 mg Mass ...

Q: Consider the reaction between ammonium and oxygen: 4 NH3 ) + 5 02 (e) --> 4 NO () + 6 H20 ) A chemis...

A: In this question answer does not matched any of the above option.The answer of this question should ...

Q: The average speed of helium at 25°C is 1255 m/s.Convert this speed to miles per hour (mph).

A: The unit convertion for the speed of helium has to be given.  

Q: Carry out each calculation and report the answer using the proper number of signifi cant fi gures. a...

A: For addition and subtraction. Count the number of significant figures in the decimal portion ONLY of...

Q: Answer 1, 2, 3

A:

Q: Add lone pairs where needed to give octets and then determine the shape around each indicated atom.

A: The Lewis structure is also known as electron dot structure. It is the complete representation of a ...

Q: Give the total number of electrons, the number of valence electrons, and the identity of the element...

A: Electronic configuration represents the distribution of electrons in an atom.  

Q: A dietary supplement used to prevent and treat calcium defi ciencies consists of an ionic compound f...

A: An ionic bond can be defined as the electrostatic force of attraction between cation and anions. Her...

Q: how many moles of ammonium nitrate would be required to prepare .40 L of solution that is ph 5.40 A ...

A:     NH3         +      HNO3     →       NH4NO3  weak base        strong acid            salt    Salt...

Q: Which element in each pair is larger? a. bromine and iodine b. carbon and nitrogen c. silicon and po...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: Strontium-90 is a radioactive element formed in nuclear reactors. When an unusually high level of st...

A: The radioactive isotope of the strontium is strontium-90 and has 28.8 years half life. The biochemic...

Q: Use an orbital diagram to write the electronic confi guration of each element whose location is show...

A: The electronic configuration tells about the distribution of electrons of an atom in the atomic or m...

Q: Combustion reactions take place between a fuel and oxygen and produce carbon dioxide and water. Bala...

A: In simple words combustion is burning. Combustion reaction is chemical process in which substance re...

Q: 21. Which of the following statements is TRUE for an unsaturated solution?  A. Undissolved solute mu...

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for yo...

Q: What is the percent magnesium hydroxide, if a sample of magnesia magma weighing 5.2430g when dissolv...

A: By law of equivalence : Number of equivalents of Mg(OH)2 = equivalents of H2SO4 + equivalents of NaO...

Q: How many millimoles of phosphoric acid (a triprotic acid, H3A) can be completely neutralized by 20.0...

A: From given  20 ml of 0.252 M KOH = (20x0.252/1000) moles KOH=0.00504 moles KOH

Q: Identify the elements in each chemical formula and tell how many atoms of each are present. a. K 2Cr...

A: The number of atoms are mentioned at their subscript. Number of atoms present in the given chemical ...

Q: How many protons and electrons are present in each ion: (a) Ca 2 +; (b) O 2 −?

A: (a) The given ion is Ca2+.

Q: What is the pH of the solution when 0.2M HCl, 0.4M NaOH and 0.2M HCN is mixed, assuming the volume i...

A: NaCN is weak electrolyte it is Hydrolysis in water to Produces HCN and OH- ion  0.2M HCl means = 0.2...

Q: What is the number of electrons in the fifth subshell orbital?

A: Each shell has subshell which has orbitals.  

Q: Keeping in mind that some elements violate the octet rule, draw a Lewis structure for each compound:...

A: Lewis structure represents the bond via dots.  

Q: The maximum amount of lead fluoride that will dissolve in a 0.206 M lead nitrate solution is М. Subm...

A:

Q: Write the formula for the ionic compound formed from each cation and anion. a. lithium and nitrite b...

A: a. lithium and nitrite LiNO3 b. calcium and acetate Ca(CH3COO)2 c. sodium and bisulfite NaHSO3

Q: Label the bond formed between carbon and each of the following elements as nonpolar, polar, or ionic...

A: Since you have posted multiples sub-parts, the answer for first three sub-parts are given below. Kin...

Q: A 5.80-g sample of copper is heated from 55.0C to 75.0C. The amount of energy required to 23.20j . T...

A: The heat capacity is the ratio of the energy supplied in the form of heat to the rise in the tempera...

Q: Identify and name all the different functional groups in the following molecule. CH3 CI l. CO,H CH3 ...

A: The functional group is atoms or bonds present in the compound that is responsible for characteristi...

Q: How many protons, neutrons, and electrons are contained in an atom of argon, which has an atomic num...

A: The atomic number is determined by the number of protons. The number of neutrons is obtained by the ...

Q: d) Explain why A is less reactive than B towards a nucleophilic attack. `H. A.

A: The reactivity of aldehyde depend upon the electrophilic character of carbonyl Carbon.

Q: What element is located in group 1A but is not an alkali metal?

A: The elements that are present in group 1A are called as alkali metals because their hydroxides form ...

Q: Rank the following elements in order of increasing ionization energy: nitrogen, fl uorine, magnesium...

A: Increasing order of ionization energy : Na < Mg < P < N < F Periodicity of ionization en...

Q: Answer the following questions about the macronutrients calcium, magnesium, and sulfur. a. Is each e...

A: Since you have posted multiple sub-parts, the answer for first three sub-parts are given below. Kind...

Q: How many valence electrons does an element in each group contain: (a) 2A; (b) 4A; (c) 7A?

A: (a)  Group 2A : Valence electrons = 2 (b)  Group 4A : Valence electrons = 4 (c)  Group 7A : Valence ...

Q: Find the Density: A solid object has a mass of 1.86 lb and a volume of 160 mL. Express your answer ...

A: Density of the Substance is the mass of that Substance present in particular volume of this Substanc...

Q: Rank the following organic acids from strongest(1) to weakest (5). HO HO COH C. HO А. В. HO D. NO2 E...

A:

Q: If one gallon of gasoline contains about 2.0 g of lead, how much lead (in kg) is emitted into the at...

A: The given data contains, one gallon of gasoline contains 2.0 g of lead.

Q: a) Rank the following in order of increasing boiling point. HO HO, CH3 A B

A: The boiling point depends on the strength of intermolecular forces between the molecules. The greate...

Q: Classify each micronutrient in Figure 2.2as a metal, nonmetal, or metalloid.

A: An atom can be considered as the smallest unit of any matter. An atom is composed of certain sub-ato...

Q: QUESTION 10 (4b-401-1.53-1) An intern working in a research lab knocks over a beaker containing an i...

A: For such type of questions, we first calculate the number of moles present initially, and then after...

Q: Write a formula that corresponds to each name. a. selenium dioxide b. carbon tetrachloride c. dinitr...

A: The formula corresponds to each name has to be given.

Q: 2 2 Calculate the following: a. If K, = 1.76 x 10-5, what is pK.? b. If Ka If pH = 2.500, what is [H...

A: Kw = Ka×Kb = 1× 10-14  From here we can calculate ka and Kb  pKa = - log Ka  pH = - log [H3O+] pOH =...

Q: Name each ionic compound. a. FeCl 2 b. FeBr 3 c. FeS d. Fe 2S 3

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for ...

Q: Give an example of an element and a compound.How do elements and compounds differ?

A: Element is a substance whose constituents atoms have the same atomic number. Two or more different e...

Q: Predict whether the bonds in the following compounds are ionic or covalent: (a) NaI (sodium iodide);...

A: An ionic compound is formed as a result of the complete transfer of electrons between two atoms. Ion...

Q: What determines the formula of an ionic compound?

A: An ionic compound is made of a group of atoms. An ionic compound is said to be stable when electrons...

Q: Calculate the concentration of buffer components present in 209.00 mL of a buffer solution that cont...

A:   Volume of the solution = 209.00 mL   Number of moles of NH4+ =M*V = 0.320 M * 209.00 mL = 66.88 mm...

Q: Direction: Analyze each of the following statements whether it describes the heating and cooling cur...

A: 1. False  Replace irreversible by reversible. 2.  sorry I can't answer this as you haven't attached ...

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.