How long would it take, in minutes, for the amount of lead-196 to decrease from 80.0 mg to 10.0 mg?

Q: how to use the equation of the line to calculate the arrhenius pre-exponential factor a   y =…

A: Equation : y=-1.3376×104 x+ 34.073

Q: What mass in grams of CO2 is evolved in the complete decomposition of a 2.300-g sample that is 38.0%…

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Q: 4. Enter the chemical equation 2H+(aq)+S2−(aq)→H2S(g)2H+(aq)+S2−(aq)→H2S(g)?

A: Given:-we have to  enter the chemical equation.2H+aq+S2-aq →           H2Sg

Q: Are Ca, K, Na spectator ions?

A: In a chemical reaction; the substance which involves in conversion is said to be reactant whereas…

Q: While idly tossing a baseball from hand to hand one day, your friend Yolanda (an expert chemist)…

A: Given statement is  "Metal sulfides react with strong acids to produce hydrogen sulfide and a salt"…

Q: Question 17 How many moles of iron are needed to make 17g of Fe2O3? 4Fe +302 2FE2O3 Type your answer…

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Q: Assuming complete reaction, what volume of 0.200 mol dm HCl(aq) is required to neutralize 25.0 cm of…

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Q: the concentration of lead (ii) nitrate goes down when it is mixed with potassiu

A: Why the concentration of lead (ii) nitrate goes down when it is mixed with potassium iodide

Q: der these reactions, where M represents a generic metal. 2 M(s) + 6HCl(aq) → 2 MC1₂ (aq) + 3 H₂(g) -…

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Q: 13. Complete the table below. :8 hes Equation 1: Equation 2: 1 H₂(g) + 02(g) Mg(s) + 2HCl(aq) SUL…

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Q: Consider the following scenario: Carbon and oxygen combine to form carbon dioxide. A chemical…

A: We are given the reaction of formation of carbonsioxide from carbon and oxygen. We are to discuss…

Q: Solar winds composed of free protons, electrons, and particles bombard Earth constantly, knocking…

A: Given data: Earth loses 3.0Kg matter/sec. Time given=50billion years. Mass % of nitrogen occupied of…

Q: The reaction between nitrogen and oxygen is given below: N2(g) + 2 O2(g) → 2 NO2(g) We therefore…

A: Answer:- This question is answered by using the simple concept of a chemical reaction. In the given…

Q: 3. The atmosphere currently contains 398 ppm(v) CO₂. How many kilograms of carbon is this? Note: the…

A: To calculate the amount of carbon in the atmosphere in kilograms, we need to first find the total…

Q: 19. The chemical equation for photosynthesis is _CO2 (g) + H₂O (1)→____C6H1206 (s) +_ (C6H12O6 is…

A: The given chemical equation for photosynthesis is CO2(g)+H2O(l)→C6H12O6(s)+O2(g). Amount of CO2…

Q: Nitrogen trifluoride, NF3, is used in the production of flat panel displays. It is also a potent…

A: Here we have to convert  0.454 ppt of NF3  in 2008 to mg per kg of air.

Q: Write the reaction for the generation of oxygen in word form and then using chemical symbols.

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Q: Hydrogen peroxide decomposes as shown below: 2 H2O2 → 2 H2O + O2 molar mass H2O2 = (34.0 g/mol)…

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Q: The 2-step process for melamine is: CO(NH2)2(l)→HNCO(l)+NH3(g) 6HNCO(l)→C3N3(NH2)3(l)+3CO2(g)…

A: Given,Mass of urea, CO(NH2)2 = 189.0 kg = 189000 g   (1 kg = 1000 g)Moles of urea can be calculated…

Q: 2 Al(s)+3CuCl,(aq)→3Cu(s)+2 AlCl, (aq) A piece of aluminum metal is placed in an aqueous solution of…

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Q: A concentration of carbon monoxide of 4000  ppm  (0.400 %  by mass) in air is lethal in about half…

A: Given: Volume of car = 2.9 m3. Since 1 m3 = 1000 L Hence volume of car in L = 2900 L

Q: Draw a molecular picture that illustrates the following reaction. Molecular hydrogen and carbon…

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Q: When magnesium hydroxide reacts with nitric acid, it produces magnesium nitrate and water. Mg(OH)2 +…

A: The given balanced equation is :-  Mg(OH)2 + 2HNO3 → Mg(NO3)2 + 2H2O

Q: Classify each chemical reaction: Reaction H₂SO3(aq) → H₂O (1) + SO₂(g) - Cl₂(g) + 2KI (aq) 2K Cl(aq)…

A: Balance chemical reactions are those which number of atoms on both side of the reaction are equal.…

Q: One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide…

A: The solution is provided in the next step:

Q: 1. Classify the following reactions as homogeneous or heterogeneous (highlight one) a. 2 SO₂(g) +…

A: Homogeneous reaction: These are those reactions in which all the reactants and products are in the…

Q: When potassium metal is placed in water, a large amount of energy is released as potassium hydroxide…

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Q: Adding helium to a balloon increased its volume from 479.9 mL to 2.961 L. If the final number of…

A: Given: Initial volume =  479.9 ml Final volume = 2.961 L Initial moles (n1) =? Final moles = 16…

Q: 25. NaOH Fe2(SO4)3 >

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The reaction between ammonia and oxygen is given below: 2 NH3(g) +2 O2(g) → N2O(g) +3 H₂O(1) We…

A: The objective of the question is to determine which of the given reactions can occur based on the…

Q: The concentration of gold in seawater is 0.0027 ug/L. What mass of gold (in kg) is present in the…

A: Given: The concentration of gold in seawater = 0.0027 ug/L. Volume =  3.23 x 1011  km3  To…

Q: Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe)…

A: According to the question, we have: Mass of mixture of Fe and Al = 6.00 g Excess of HCl is present…

Q: A 1.00 mL sample of seawater is determined to contain 2.50 × 10-14 moles of dissolved gold. How…

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Q: Hydrogen peroxide decomposes as shown below: 2 H2O2 → 2 H2O + O2 molar mass H2O2 = (34.0…

A: Hydrogen peroxide decomposes as shown below: 2 H2O2 → 2 H2O + O2 molar mass H2O2 = (34.0 g/mol) A…

Q: 2. NITROGEN MOLECULES It is difficult to think that some good things come from the electrical…

A: Note: As per guidelines I can answer only the first question answer.  Nitrogen is a nonmetal.…

Q: What mass of Cu(103)2 can be formed from 0.650 g of CuSO4.5H2O? What mass of KIO3 is needed to…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Hydrogen peroxide decomposes as shown below: 2 H2O2 → 2 H2O + O2 molar mass H2O2 = (34.0 g/mol)…

A: Mass Percent = Mass of Solute/Mass of sample × 100

Q: Write a balanced chemical equation based on the following description: solid sodium reacts with…

A: The objective of the question is to write a balanced chemical equation for the reaction of solid…

Q: What is true for this chemical reaction: CO₂(g) + 4H₂(g) = CH4(g) + 2H₂O(g)? Select an answer and…

A: Enthalpy is a thermodynamic property. It is the sum of the internal energy plus the product of…

Q: Balance the following chemical equation (if necessary): Sio,(s) + C(s) → Si(s) + CO(g) ->

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.