Radium decomposes at a rate proportional to the quantity of radium present. Suppose that it is found in 25 years that approximately 1.1% of a certain quantity of radium has decomposed. How many percent of the original amount or radium decompose after 76 years?

Q: ecific gravity of 13.6 contained in the tank. Wh rcury surface O 0.29 V O 0.34 V O 0.74 V O 0.47 V

A:

Q: When Ethanol is burn in the presence of Oxygen. Carbon Dioxide (CO2) and water (H2O) molecules are…

A: Given data-

Q: Calcium has an FCC crystal structure, density of 1.55 Mg/m3, and atomic massof 40.08 g/mole.a.…

A: Given: The density of the material is ρ=1.55×106 gm3. The atomic mass of the element is A is A=40.08…

Q: Chlorine gas (7 mg/1 as Cl,) was added to water sample. The free residual chlorine and pH are 2 mg/1…

A:

Q: tank of carbon tetrachloride has a mass of 784 kg

A:

Q: It is seen that solids and liquids will have different coefficients of volume expansions for…

A: Coefficient of volume expansion:- The unit increase in the unit volume of any substance following…

Q: RTC means? * Your answer For the particles of an atom, which two particles have the same mass? *…

A: RTC - Regensburg Theoretical Chemistry   Protons and Neutrons have same mass - 1.67*10-24grams

Q: C/ Bismuth (Bi) was melted at 2710C and tin (Sn) was melted at 2320C. Bismuth and ten are formed a…

A: Consider these points 1.) At eutectic point, liquid transform into two different solid states on…

Q: Explain about the reaction mass in the statnamic test.

A: The statnamic test is the tests which are used for determining load carrying capacity of deep…

Q: The total hardness in raw water is 500 milligram per liter as CaCO3. The total hardness of this raw…

A: given- total hardness=500 mg/L as CaCO3Total hardness=?

Q: A water has the following analysis (mg/L as ion or compound): Na+ 20 mg/L 40 mg/L K 30 mg/L 67 mg/L…

A:

Q: Period 6 is unusual in several ways.(a) It is the longest period in the table. How many elements…

A: Period 6 accommodates a total of 32 elements from Cesium (At. No. 55) to radon (At. No. 86). Out of…

Q: The radioactive isotope of lead, PB-209, decays at a rate proportional to the amount present at time…

A:

Q: Determine the density of a hypothetical BCC metal with an atomic mass of 63.5 g/mole and atomic…

A: Given: BCC lattice structure Atomic mass, M = 63.5 g/mol Atomic radius, r = 0.128 nm   Also, Number…

Q: Considering an alloy of the two components A and B described by a phase diagram Figure, determine…

A: Given: Total mass, M = 100 gm Percentage of component B, PB = 45% Percentage of component B in…

Q: A fluid in motion suffers a frictional loss, which is an expenditure of energy required to overcome…

A:

Q: In an ion exchange process, which ion has a higher affinity for exchange: Potassium ions (K+) or…

A: Calcium ions has a very high affinity. According to the  general principles  The higher the charge,…

Q: : What mass of AgNO3 is needed to convert 3.46g of Na2CO3 to A92CO3, and calculate the mass of…

A:

Q: Determine the density of a hypothetical BCC metal having an atomic mass of 63.5 g/mole and atomic…

A: Given: BCC lattice structure Atomic mass, M = 63.5 g/mol Atomic radius, r = 0.128 nm   Also, Number…

Q: Determine the number of protons and neutrons in each isotope Na 11 protons, 12 neutrons O 12…

A:

Q: We have an initial amount of H3N2Cl4 of 72 milligrams, and a half-life of 60 days. Find the decay…

A: With the help of the exponential curve growth and decay graph, we can analyze the material decay at…

Q: A 325 L of carbon tetrachloride weighs 4905N. What is its unit weight in kn/m3. What is its specific…

A: Given data :-  Volume of Carbon tetrachloride (V) = 325 L  V = 0.325 m3  And  Weighs of Carbon…

Q: A tank of carbon tetrachloride has a mass of 784 kg and a volume of 0.481 m3. What is its specific…

A:

Q: A metal ball of radius 90 centimeters is coated with a uniformly thick layer of ice, which is…

A: Solution-The given values are,The inner ice layer radius (Ri)=90cmThe rate of change of volume w.r.t…

Q: Sel 10 only: 1. Which one has low Si + Al elements, land Earth crust or oceanic Earth crust? 2.…

A: 1) heavier minerals are found in lower parts of crust. But mineral like Al are not found in oceanic…

Q: An electrolytic cell produces aluminum from Al2O3Al2O3 at the rate of five kilograms a day. Assuming…

A: The oxidation reaction for the Al2O3 is Al2O3→4Al3+aq+3O2g+12e- From the reaction we get number of…

Q: 120 mg/m3 of SO2 concentration is present at STP. What will be its concentration in ppm at 20°C?

A:

Q: 7. Which among the following is the formula for Gibbs free energy? a) H-TAS b) H-T c) TAS d) H-S

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Q: The population of bacteria in a culture grows at a rate proportional to the number of bacteria…

A:

Structure of materials

The word ‘structure’ means the thing that is built or constructed from combining the different interrelated parts on a definite location on the ground surface. The structure should be able to possess sufficient rigidity against the external loads that are applied to it.