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A steel alloy to be used for a spring application must have a modulus of resilience of at least 2.07 MPa (300 psi). What must be its minimum yield strength? The modulus of elasticity is 207 GPa (30 × 106 psi)
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 h. How long does it take for 99.99% of a sample of sulfur-38 to decay
The average person burns 12000 kJ of food energy per day(2,800,000 cal.) If the heat of combustion of sugar is 4000 cal/g, and the heat of combustuio of fat is 9000 cal/g: How many grams of sugar must eat to get a day's supply of energy
Living organisms use energy from the metabolism of food to create an energy-rich molecule called adenosine triphosphate (ATP). The ATP then acts as an energy source for a variety of reactions that the living organism must carry out to survive.
Predict whether the equilibrium favors the reactants or the products for each of the following reactions: a)H3PO4(aq)+H2O(l) H3O^+(aq)+H2PO4^-(aq). b)CO3^2-(aq)+H2O(l) OH^-(aq)+HCO3^-(aq) c)HS^-(aq)+H2O(l) H3O^+(aq)+S^2-(aq) d)HCN(aq)+CH3-NH2(aq..
How many moles of hydrofluoric acid (ka=6.8e-4) must be added to 500 ml of .10M sodium fluoride to give a buffer of pH 3.20
Given that 4NH3(g)+5 O2(g)---> 4NO (g)+ 6H2O (g), If 8.2 moles of NH3 React with sufficient oxygen, how many moles of water will be formed?
Determine the temperature dependence of the diffustion limited rate constnt (kdiff proprotional T7/3 or so )
Calculate the total heat capacity in J/degreeC for a bomb calorimeter that contains 2069g of water(Sp.Ht=4.18 J/g degreeC) 588g steel bomb (Sp.Ht.=0.88 J/g degreeC) 12g thermometer (Sp.Ht.=0.79 J/g degreeC)
How many milliliters of 0.200 M FeCl3 are needed to react with an excess of Na2S to produce 1.38 g of Fe2S3 if the percent yield for the reaction is 65.0%? 3 Na2S(aq) + 2 FeCl3(aq) ? Fe2S3(s) + 6 NaCl(aq)
a scientist proposed the following equation of state p rtvm - bvmsquared cvmcubed show that the equation leads to
How many moles of methane are produced when 82.6 moles of CO2 gas react with excess hydrogen gas? CO2+4H2----->CH4+2H2O I am having problems trying to set this problem up correctly, any help would be appreciated
How many jules of energy are needed to change 275 g of water from 15 degrees celcius to steam at 50 degrees celcius
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