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The volume of a cylindrical capillary tube is given by V = ? r^2h where r is its radius and h its height. If the radius of the capillary tube is found to be 0.030 ± 0.002 cm and the height found to be 4.0 ± 0.1 cm, what is the volume of the capillary tube and its associated error? What measurement must be made to a higher precision to decrease the error in the volume?
The minimum frequency of light needed to eject electrons from a metal is called the threshold and find the minimum energy needed to eject electrons from a metal with a threshold frequency of 3.27*10^14s^-1.
When 5.0 g of an unknown compound is dissolved in 200.0 g of carbon tetrachloride, CCl4, the freezing point of the solution is -31.8 degC. The freezing point of pure carbon tetrachloride is -22.3degC
If 3.00 g of (NH4)2SO4 is dissolved in enough water to form 200. mL of solution, what is the molarity of the solution?
What masses of iron(III)oxide and aluminium must be used to produce 15.0g iron? What is the maximum mass of aluminium oxide that could be produced?
At a particular temperature, K 3.75 for the reaction SO2(g) + NO2(g) SO3(g) + NO(g) If all four gases had initial concentrations of 0.800 M
A compound contains 43.64% P with the remainder being oxygen. What is the empirical formula of the compound?
what are the pH and the change in pH after the addition of 0.054 mol hydrochloric acid to the buffer solution?
Consider the solubility information BaSO4 = 3.4 ×10 -4 g 100 g H2O at 20 ?C.Calculate the solubility-product constant Ksp
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
Calculate Ecell for the following electrochemical cell at 25 °C Pt(s) | H2(g, 1.00 atm) | H+(aq, 1.00 M) || Pb2+(aq, 0.150 M) | Pb(s) given the following standard reduction potentials.
If it takes 52 J of energy to warm 7.40g of water by 17°C, how much energy would be needed to warm 7.40g of water by 55 °C
Determine How much sodium hydroxide (in grams) is required to form 546 mL of solution with a pH of 10.00?
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