Question

A sample of a material has 200 radioactive particles in it today. Your great-grandfather measured 400 radioactive particles in it 90 years ago. 90 years from today, how many radioactive particles will the sample have?

180 years from today, how many radioactive particles will the sample have?

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Chemistry

General Chemistry

Related Chemistry Q&A

Find answers to questions asked by students like you.

Q: Not understanding the balancing of formulas or the the complete ionic and net ionic equations.

A: Since we are entitled to answer upto 3 sub-parts, we'll answer the first 3 sub-parts of first questi...

Q: Table 5.5 (data)ObservationsSample Tested Add NH 3Solid CaCO 3 _______Solid CuSo 4 _______Mixture __...

A: In first image two solutions are prepared -one of solid calcium carbonate and other of solid copper ...

Q: Consider the reaction:C2H4(g) + H2O(g)CH3CH2OH(g)Using standard thermodynamic data at 298K, calculat...

A: The standard thermodynamic data for the given reactants and products at given temperature is,

Q: The solubility of siliver bromide can be increased by dissolving it in a solution containing the thi...

A: The Equilibrium constant for the overall reaction = K1 × K2

Q: Question 4 of chapter 4, General Chemistry: Principles and Modern Apps by Petrucci   Balance th...

A: (a)The chemical reaction of sulphur dioxide gas with oxygen gas to produce sulphur trioxide gas is g...

Q: Draw the Lewis Dot structure for N2 (on paper, not on Canvas) then answer the questions. a. How many...

A: Skeletal structure of N2 is given below. Each nitrogen atoms contribute 5 electrons and hence total ...

Q: write a balanced chemical reaction for the reaction of zinc with iodine, assuming that zinc and iodi...

A: Both zinc and iodine are in solid form which means they exist as Zn and I2

Q: Keactions Br2 FeBr3 C12 Fecl3 S03 7 H2soy 7 HNO

A: The products of the given reactions can be written asBenzene reacts with chlorine or bromine in an e...

Q: The first order decomposition of C3H6(g) at a given temperature has a half-life of 5.522 x 103 secon...

A: Half-life is the time required by any substance to reduce to its half of initial concentration. 

Q: -3. The approximate CCO angle in acetone, HCCCH, , is a. 180° b. 90° c. 109° d. 60° e. 120°.

A: The C=O carbon in the acetone has three sigma bonds (two sigma bonds with methyl group and one sigma...

Q: What is the chemical reaction when completing extraction experiment and using 100mg Benzoic Acid, 2m...

A: The mixture of the Benzoic acid in 2ml of water and Dichloromethane, the benzoic acid organic it is ...

Q: What is the Kinetic energy of a 2000-Ib car traveling at 59 miles per hour? (Ib =0.4536 kg, 1 mi= 1....

A: The Kinetic energy of a 2000-lb car traveling at 59 miles per hour is calculated as,1lb =0.4536 kg1m...

Q: Hello, I am looking for a step by step method for balancing more complicated chemical equations beca...

A: A chemical equation is balanced when the number of atoms of  each element and the total charge on re...

Q: Calculate the difference in pH upon the addition of 1.00 mL of 0.100 M NaOH to 1.00 L of formate buf...

A: The pH of the sodium formate-formic acid buffer system is calculated as,

Q: A wave has a frequency of 5041.28 Hz and a wavelength of 6.51 m. What is the speed of the wave? m/s

A: in the given question ,v= frequency of wave= 5041.28 Hz or s-1ʎ=wavelength of wave =6.51m the speed ...

Q: At 20 degrees celcius, a 0.516 m aqueous solution of glucose (C6H12O6) has a density of 1.0165 g/mL....

A: In chemistry, number of moles refers to a unit of amount. It can also be defined as the mass of a ch...

Q: The frequency of a Microwave wave emitted from an unknown source is measured and found to be 7.1 x 1...

A: Energy of radiation is given by formula:E=nhv where n=no. of quanta=1h= planck\\'s constant =6.626×1...

Q: 66 X 6:21 PM Sandy 5 min, IMG_2274.jpg ming.com/ibiscms/mod/ibis/view.php?id 7679890 Sear ward Commu...

A: The mole fraction of a gas is determined using the below formula.

Q: Table 12.7 (data)   Salt Solution pH Sodium acetate   Ammonium chloride   Sodium carbonate  ...

A: pH of a solution ranges from 0 to 14.  When a solution has pH less than 7, it is acidic; when a solu...

Q: What is the change  in the enthalpy at 25*C and 1 atm for the production of 3.00 mol SnO(s)?  Sn(s) ...

A: The given balanced chemical equation is

Q: can you explain how to convert Newman projections to line angle formulas? and provide a few examples...

A: Newman Projection to Bond-Line notation :Newman projection visualizes the conformation of a chemical...

Q: A metal sample weighing 51.0 g and at a temperature of 100.0 oC was placed in 38.8 g of water at 25....

A: Hey, since there are subpart questions posted, we will answer first three questions. If you want any...

Q: 3. Which of the following is the Lewis dot structure for the fluoride ion? a. b. c.

A: The fluorine atom forms fluoride, which has 8 valence electrons, and is isoelectronic with a Noble G...

Q: benzoic acid and 2- naphthol

A: Carboxylic acids (like that in benzoic acid) have a pKa between 4-5 while phenols (seen in 2-naphtho...

Q: Calculate the molar solubility of calcium hydroxide in a solution buffered at a pH of 4.0

A: Calcium hydroxide is an ionic compound which dissociates in aqueous solution. Ca(OH)2 <-------&gt...

Q: For the reaction 2 H2S(g) <==> 2 H2(g) + S2(g) the value of Kc = 1.6e-2 Calculate the value of...

A: Kc  of the reaction is calculated as follows,

Q: what would the chemical reaction be for the process of aspirin when combining salicylic acid, phosph...

A: Preparation reaction of aspirin from the combination of salicylic acid, phosphoric acid, and acetic ...

Q: 5. A balloon used for atmospheric research has a volume of 1.0 x 106 L. Assume that the balloon is f...

A: The combined gas law relates "before and after" atmospheric conditions of a gas.  The volume of heli...

Q: For the reaction shown, at 25° C, dleta S  is0.00300 kJ/(mol K). Calculate the delta G for this reac...

A: The equation given below helps us to calculate the change in free energy in a system.

Q: When blue food coloring is dissolved in water, the result is a ________? a. homogeneous mixture call...

A: When particles moves from higher concentration to lower concentration than diffusion occurs. The pro...

Q: What would the theoretical yield and then reaction yield % be for esterification. My data point incl...

A: Theoretical yield is the amount of product predicted based on the stoichiometric ratio of the reacta...

Q: Which of the following will have the highest boiling point? Justify your answer.A. 0.10 m sodium sul...

A: The boiling point of normal compounds depends on the strength of the intermolecular forces between t...

Q: What is the atomic mass of butane (C4H10)? (C:12; H:1) a. 28 b. 58 c. 116 d. 172

A: The atomic mass of a compound is the sum of the mass of all the atoms present in the molecular formu...

Q: Grignard Reactions Provide the structure of the major organic product in the reaction shown below. 1...

A: The Grignard Reaction is the addition of an organomagnesium halide (Grignard reagent) to a ketone or...

Q: 0 0 0 H3NCH-C-NH-CH-CNH-CH-C- сH CH2 CH2 CH2 NA CH2 -NH CH2 OH NH3 a. Lys-His-Phe b. Lys-His-Tyr c. ...

A: The organic compound containing amine and carbonyl functional group along with a side chain known as...

Q: A commercial juice is known to have 130 % of the daily allowance of vitamin C per serving (235 mL). ...

A: 100% of the daily allowance of vitamin C per serving is calculated as,

Q: For the reactionCaCO3(s)CaO(s)+ CO2(g)H° = 178 kJ and S° = 161 J/KAt standard conditions, this react...

A: For the given reaction, the value of ΔH and ΔS is given and it is required to determine at what cond...

Q: what would the chemical reaction be for an experiment completing esterification of combining acetic ...

A: Write the chemical reaction of esterification of combining acetic acid with 1-butanol and find the w...

Q: Identify the preferred site(s) of electrophilic attack on the following compound. 3. CH2-0- ring 1 r...

A: -CH2O- group present on the ring 1 is deactivating group whereas –OCH2- group is an activating group...

Q: Determine the pH of a solution that is 0.20 M in NH3 and 0.30 M NH4Cl

A: The mixture of NH3 with NH4Cl is a buffer solution as it is a mixture of weak base (NH3) with its co...

Q: Please draw the ma lor Products for the olouwing r HBr/Uvlight Hz /Lindlars Ca talyst onc

A: When the given alkene reacts with HBr under UV light, it undergoes bromination through anti-Markovni...

Q: Why CH3CH2OH is most soluble is water?

A: Because of hydrogen atom in ethanol is directly bonded to oxygen atom, which can form hydrogen bondi...

Q: What is the OH- concentration in a 7.5 x 10-3 M Ca(OH)2 solution?

A: Calculate the OH- concentration in a 7.5 x 10-3 M Ca(OH)2 solution.

Q: When 5.967 x 10-1 mol of NH3 and 5.967 x 10-1 mol of O2 are introduced into a 1.976 L reaction vesse...

A: An equilibrium constant  is the ratio of concentration of products and reactants raised to appropria...

Q: If the RDA for vitamin C is 60. mg per day, and there are 70. mg of vitamin C per 100. g of oranges,...

A: The relation between oz. and g is as follows:1 oz. = 28.3495 gThus,3 oz. = 85.0485 gThe relation bet...

Q: what is the correct name of Au3(PO2)2

A: Oxidation number of Au is determined as given below.

Q: Label each ionic compound as either "soluble" or "insoluble" in water: a. BaSO4  b. Na2CrO4  c. Cu3(...

A: (a)On the basis of solubility rules, generally sulfate (SO42-) ion forms soluble salts but BaSO4 is ...

Q: 3. The number of significant figures in 0.090900 * 10^-4 is

A: Rules for finding number of significant digits are:1) All non zero digits are significant2) Zeroes p...

Q: What is the hybridization of the sulfur atom in sulfur hexafluoride? 1. sp2 2. sp3d2 3. sp3d ...

A: Hybridization is a hypothetical phenomenon or an idea where atomic orbitals combine together in such...

Q: 5. How do you separate acetanilide from sand?

A: Acetanilide is a water soluble substance whereas sand is insoluble in water.  Add some hot hot water...