he radioactive isotope strontium-81 is used in medical imaging as indicated on the table above. If 40.7 milligrams of strontium-81 is dministered to a patient, how many milligrams are left in the body after 88.8 minutes? mg

Q: The atom with the largest radius is O Krypton O Strontium O Uranium Bromine

A: The trend of atomic radius in the periodic table is such that when we go across the period the…

Q: -294 In 2006, the synthesis of 118 Uuo (an isotope of element 118) was reported to involve the…

A: A correct nuclear reaction is that in which total charge and mass is conserved . That means sum of…

Q: The rates of many reactions approximately double for each 10°C rise in temperature. Assuming a…

A:

Q: 1. A reaction has an equilibrium constant Kp = 0.018 at 25°C. Calculate the standard free energy…

A:

Q: (a) beta emission from aluminum-30 Al He + Na Al → e + Si 13 Al + e Mg 13 Al - e + Si 30 (b) alpha…

A:

Q: What is the half-life of bismuth-214 if 62.5 minutes are required for the activity of a sample of…

A:

Q: The reaction of an acid and a base to form water and a salt is called:   a. combination   b.…

A: We have to predict the correct term for given sentence.

Q: aromatic, antiaromatic, or non aromatic molecule?

A:

Q: How CO2 be converted to value-added products mediated by ionic can quids such as CO2 hydrogenation,…

A:

Q: CI CH3

A:

Q: Determine the oxidation state of the metal atom in each of the following complex ions. ion oxidation…

A: Write oxidation state of given transition complex---

Q: Write a balanced nuclear equation for the following: The nuclide aluminum-25 undergoes positron…

A: Positron is a counterpart of an electron. Charge of positron is +1. The emission of positron  lowers…

Q: s: 4s! Ba104p! 28 3 outer electrons: Incorrect Incorrect 3 s: Incorrect 4f\45d*

A: Electronic configuration is the distribution of electrons in various orbitals.  A)  Inner electrons…

Q: When a sample of potassium nitrate is dissolved in water to prepare a solution, the potassium…

A: When a sample of potassium nitrate is dissolved in water to prepare a solution, the potassium…

Q: Он HO- H,SO, Но- NO2 OH

A:

Q: CH CHOO Br NO, CHCI/AICI3 CI CI CH3 CH3 HBr at 40°C

A: 1. Aromatic Sn2. 2. Aromatic Sn2. 3. Fridel craft alkylation. 4. 1,4-addition at high temperature.

Q: One possible mechanism for the decomposition of ethane, C2H6, into ethylene, C2H4, and hydrogen,…

A:

Q: A Haber process reactor contains 25.0% nitrogen and 75.0% hydrogen for the synthesis of ammonia.…

A:

Q: How many gallons of octane, C3H18, having a density of 0.703 g/cm°, would have to be burned to…

A: Interpretation- How many gallons of octane , C8H8  having a density of 0.703g/cm3 ,  would have to…

Q: Give the meachanism 2 f>2.0e2). im THF then H20 Li soea) क चारह them Hoot

A: Reaction 1 : Grignard ( 2 eq) reaction with esters produces alcohols. Vinyl lithium ( 2 eq )…

Q: Why do you think that learning the principles behind colligative properties of solution benefit the…

A: Colligative properties are freezing point depression, boiling point elevation, vapour pressure…

Q: Write the balanced neutralization reaction that occurs between sodium hydroxide and acetic acid.

A: * Acid and  base react to give salt and water.The      reaction  is known as acid base reaction .…

Q: A student tells you that the  sets of numbers below are listed in the following order:  n; l; ml ;…

A: given :-  quantum number sets : n  l  ml  ms 3; 2; 1; -1/2 4; 3; 3; 1/2 1; 0; 0; -1/2 2; 0;…

Q: Which of the following is true of pH? It is a measure of the overall acidity. It is a measure of…

A: Acids - - > Acids are any substance that tastes sour in aqueous solution, makes blue litmus paper…

Q: How much KCl and water  must be mixed to prepare 265. grams of a 11.5 % by mass aqueous solution of…

A: Given-> Weight of solution = 265 gm (m/m)% = 11.5 %

Q: Calculate ΔrG° for the disproportionation reaction of copper(I) ion (Cu+) at 25 °C. 2 Cu+(aq) →…

A: Disproportionation reaction -> 2Cu+(aq) ---> Cu2+(aq) + Cu(s) Cu+ + e- ---> Cu(s)       E°…

Q: Which of the following describes the reaction: 86 222 Rn → He + 218 Po 84 O alpha decay reaction O…

A: There are different kind of radioactive decays like alpha, beta , positron etc. In radioactive…

Q: Identify the reactant that gets oxidized in the following reaction 5C2O4^2- (aq)+…

A: Given :-  5C2O42-(aq) + 2MnO4-(aq) +16H+(aq) →2Mn2+(aq) + 8H2O(l) + 10CO2(g)  To identify :-…

Q: The nuclear symbol for an alpha particle is The name for the greek letter y is Of the radiations…

A: We have to predict the symbol, name and least penetrating and most penetrating.

Q: List the metals you used in order from most reactive to least reactive. Explain your reasoning.

A: To list the metals used in order from most reactive to less reactive:

Q: What is the solubility of La(IO₃)₃ in a solution that contains 0.100 M IO₃⁻ ions? (Ksp of La(IO₃)₃…

A:

Q: The fuel for a thermonuclear bomb (hydrogen bomb) is lithium deuteride, a salt composed of the ions…

A: When we bombard Uranium with the neutrons, the 235 isotope of Uranium split into two lighter…

Q: Internal alkynes are able to selectively form one product when subjected to most reaction…

A: Alkynes are unsaturated hydrocarbons that can carry out electrophilic addition reaction by…

Q: 4. a) What is the osmotic pressure of an aqueous solution at 25°C if its freezing point is -2.1°C?…

A: Using relationship between different colligative properties to concentration we can calculate the…

Q: 4. The following materials are available to you: AgNO, to make any molarity of solution needed,…

A: Voltaic cell

Q: As the concentration of reactants decrease, the rate of the reaction generally O remains constant. O…

A: As the concentration of the reactants decrease, the rate of 5ge reaction generally Remains…

Q: Balance the following half-reaction occurring in a basic solution. MnO2(s) → Mn(OH)2(s)

A: To balance half reaction, we follow steps as : First we balance nain atom if required , then balance…

Q: Propane is dehydrogenated to from propylene in a catalytic reactor: C3H8 → C3H6 + H2   The process…

A:

Q: Directions: Given the AH° and AS°, Calculate the AG° values for the following reactions and indicate…

A:

Q: Consider the following balanced equation: Cl 2(8) + 2 Br (aq) Br 2(aq) + 2 CI (aq) [CI 2] [Br ] Rate…

A: Answer: Power of concentration term of the reactant in the rate law is the order of reaction with…

Q: Calculate to five significant figures the binding energy in J/nucleon of the nucleus of an atom of…

A:

Q: Male patient suffering from Diclofenac sodium or diclofenac potassium no preference : rheumatoid…

A:

Q: Solve for the molar solubility of solid Fe2(SO4)3 in a solution of 0.75M BaSO4. 1.098 x 105. Compare…

A:

Q: How many molecules of carbon monoxide (CO) are needed to react with-excess trOFE) oxide (Es) to…

A:

Q: Consider the following two reactions for the production of ethanol. (1) C2H4(g) + H20(g) →…

A: The reactions given for production of ethanol are  1. C2H4 (g) + H2O (g) → CH3CH2OH (l) 2. C2H6 (g)…

Q: How many hydrogen atoms are in a 12.2 g sample of ammonia?

A:

Q: Consider the reaction when aqueous solutions of calcium acetate and ammonium sulfide are combined.…

A: Calcium acetate + ammonium sulfide -->

Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the…

A: Given, the cell reaction: 2H+(aq) + Ni(s) → H2(g) + Ni2+(aq) We have to calculate the cell potential…

Q: Given: M(C) = 12.01 g/mol; M(H) = 1.008 g/mol; M(0) = 16.0 g/mol; M(C6H60) = 94.108 g/mol. %3D %3D…

A: Given-> M(C6H6O) = 94.108g/mole M(C) = 12.01 g/mole M(H) = 1.008 g/mole M(O) = 16.0 g/mole

Q: solution containing H2CO3 and HCO3- is a buffer (in blood). Which of the two would be consumed if a…

A: Given-> Buffer ->H2CO3/HCO3-

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.