Starting with SEVEN TONS of the ore of pitchblende, Pierre and Marie Curie isolated a few milligrams of a new element, which was named polonium.  The radioisotope Polonium-218 can undergo both alpha and beta decay reactions.  Write the TWO nuclear reactions using the proper isotopic symbols of the parent and daughters and ionizing radiation symbols.

Q: 16. Some factors have a proportional effect on reaction rates. Choose two (2) factors that have a pr...

A: A rate of reaction means the speed at which a chemical reaction take place . There are many factors ...

Q: Na2S203 + 12 →Nal+Na2s406|

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Q: Kc

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A: Answer-1 Specific weight of the substance is the product of its density and gravitational accelerati...

Q: The freezing point of pure camphor is 178.4°C, and its molal freezing-point constant, Kf, is 40.0°C/...

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Q: 15. When hot tea is poured into both a steel cup and a styrofoam cup, the steel cup quickly feels ho...

A: Steel cup is a good conductor of heat and styrofoam is a bad one as explained below . Hence the obse...

Q: Calculate the Mass in mg of 2.88 x 10 22 formula units of Bi(NO3)3.5H2O

A: Given :- number of formula units of Bi(NO3)3.5H2O = 2.88 × 1022  To calculate :- mass (in mg) 

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A: Solution -  Above statement is False Explanation - According to the question - No change in cell vol...

Q: Consider the reaction: CO2 (g) + H2 (g) → CO (g) + H2O (g) ,for which Kc=0.64 at 900 K. If the initi...

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Q: Using the following equation: 2NaOH + H,SO, > 2H,0 + Na,SO, How many grams of sodium sulfate will be...

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Q: QUESTION 9 Which of the following alkenes yield(s) 3-bromo-3-methylpentane as the major product upon...

A: The answer is as follows:  

Q: thermometer A 57.0 g sample of iron is put into a calorimeter (see sketch at right) that contains 30...

A: Given :  Mass of iron sample = 57.0 gm  Mass of water = 300 gm  Initial temperature of iron sample =...

Q: For the reaction 4 PH, (g) = 6 H,(g) + P,(g) the equilibrium concentrations were found to be [PH,] =...

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Q: At 450ºC, the equilibrium constant Kp for the reaction PCl5(g)  PCl3(g) + Cl2(g) is 2.33. Sufficient...

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Q: 5. Determine the boiling point of a solution of 10 grams of a substance of molecular weight 94 g/mol...

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Q: An aqueous solution of hydrochloric acid contains 28% HCl (36.45 g/mol) by mass. What is the molal c...

A: The mass of solute in gram present in 100 g solution is known as the mass percent concentration of a...

Q: The partial pressure of oxygen is 0. 20 atm at sea level at 25°C. Calculate its partial pressure at ...

A: The correct answer is given below

Q: 1.96 Initial pH From your analysis of the titration curve: 23.203 mL of NaOH used to reach the equiv...

A: The above method is an example of pH metric titration, where by plotting pH vs volume of titrant or ...

Q: How many equivalent particles are inside a face-centered cubic unit cell? --> particles How many equ...

A: In a face centred cubic unit cell, atoms are present at the 8 corners as well as at the centres of 6...

Q: How are the following crystals are formed? a. salt b. snow c. uric acid d. amethyst e. sugar cr...

A: Let's discuss how the crystals of salt,snow,uric acid,amethyst and sugar crystals are formed. 

Q: t mass

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Q: standard enthalpy change

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Q: A mixture containing only Al2O3 (FM 101.96) and Fe2O3 (FM 159.69) weighs 2.019 g. When heated under ...

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Q: 1. The gas pressure in an aerosol can is 1.8 atm at 25°C. What pressure would develop in the can if ...

A: Gay-Lussac’s Law: According to Gay-Lussac’s law, if we increase the temperature of a definite amount...

Q: Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite min...

A:  

Q: (List three sources of error that could account for the differences between your values for the enth...

A: Here , we are doing experiment to measure enthalpy of fusion of ice. Following errors can cause this...

Q: In terms of bond energies and thermodynamics, why do we (as a society) make so much CO2?

A: Carbon dioxide (CO2) is a greenhouse gas.  It is mostly released through human activities. It is als...

Q: Osmium tetraoxide, OsO4 is a molecular crystal. Which of the following general properties would you ...

A: Properties of osmium tetraoxide 

Q: Write balanced net ionic equations for the following reactions in basic solution: N2(g)+NO2−(aq)→N2...

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Q: Draw the (pericyclic) reaction (reaction 1), including all mechanistic steps, that lead from the sta...

A: To draw the mechanistic steps of reaction 1, show all isomers that can be formed and determine the c...

Q: Calculate the pH of a 0.10 molL- solution of hydrazine, N2H4. Kô for hydrazine is 1.3 x 10-6. Expres...

A: The given questions asks to calculate the pH of solution when the Ka or Kb value of acid or base and...

Q: Experiment Singut downfield UPfield C-0 OH triplet quacdrypiet 4.8 4.6 4.4 4.2 3.8 3.2 2.8 1.8 1.6 1...

A: Hydrogens  Multiplicity Chemical shift  a quartet 4.1 δ b singlet 2.1 δ c triplet 1.2 δ

Q: If 1.07 g of CUx{SO4)y z H2O(s) is heated to form 0.80 g of the dehydrated Cux(SO4)y(s), determine t...

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Q: 3. A solution is prepared by dissolving 66.0g of acetone, C3HeO, in 146.0g of water. The density of ...

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Q: A raindrop has a mass of 50. mg and the Pacific Ocean has a mass of 7.08 x 10° kg. Use this informat...

A: Given, Note: 1 mg = 0.001 g mass of a raindrop = 50.0 mg  = 0.05 g Note: 1 kg = 1000 g Mass of Pacif...

Q: Calculate the [OH-] and pH given that it is a mixture of 0.12 M in NaNO2 and 0.23 M in Ca(NO2)2

A: Given,  A mixture of 0.12 M in NaNO2 and 0.23 M in Ca(NO2)2

Q: Classify each of these as an element, a compound, a heterogeneous mixture, or a homogeneous mixture....

A: Elements – these are constitute the simplest chemical substances in which all the atoms are exactly ...

Q: A student reacted 49.3 mL of 1.0 M HCl at 20.0°C with 48.7 mL of 1.5 M NaOH at 22.0°C, after the rea...

A: When HCl is reacted with NaOH, neutralisation reaction takes place and NaCl and H2O will be produced...

Q: Predict the major product in each of the following reactions: (a) CH3 CH3CH2CH=CCH2CH3 H20 ? Ic) .CH...

A: The reaction of alkene (hydrocarbon with at least one C=C bond) will undergo addition reaction. The ...

Q: A mixture of krypton and hydrogen gas is expanded from a volume of 28.0 L to a volume of 39.0 L, whi...

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Q: altitude?

A: In this question, we have to choose the correct option for the above statements with suitable reason...

Q: 4) 5,5-dibromo-2,3,4-trimethylcyclooctane Expanded Structural Formula Condensed Structural Formula L...

A: The solution has been given below

Q: Figure 1. Square and rhombic unit cells in 2D layers. Use the visualization tool, and the discussion...

A: Introduction :  Lattice structure can be defined as the basic repeating 3D block representation of t...

Q: Preparation of HCI solution a. Measure 20.7 ml of concentrated Hcl (37% wt HCI) using the pipet and ...

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

Q: Using specific heat eap A chemical reaction takes place inside a flask submerged in a water bath. Th...

A: The heat transferred ( q ) can be found out using the equation,           q = m × C × ΔT  m =   mass...

Q: Suppose a 250. mL flask is filled with 1.5 mol of CO, 0.30 mol of H,O and 1.3 mol of H,. The followi...

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Q: Consider the reaction: CO2(g) + H2(g) + CO(g) + H2O(g), for which Kc = 0.64 at 900 K. If the initial...

A: Given, CO2 (g) + H2(g) ➝ CO(g) + H2O(g) Equilibrium constant (Kc) = 0.64  Temperature (T) = 900 K In...

Q: the standard NaOH(aq). Compare the hydronium ion concentration to the hydroxide ion concentration wh...

A:  This question based on acid base titration . The given HCl is neutralized by NaOH .  So we can calc...

Q: he kinetics of an enzyme-catalyzed reaction is measured in the absence and presence of two potential...

A: The answer of the following question :

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.