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Mendeleev is considered the father of the periodic table. He was so advanced that he left space for elements not discovered. Explain Mendeleev's logic in leaving blank spaces then describe how the modern periodic table came to be. (YOUR ANSWER MUST BE COMPLETE AND THOROUGH FOR FULL CREDIT)
The temperature in the freezer compartment of a household refrigerator is kept at 0 F. On a summer day the ambient temperature is 92 F. The effective performance factor for the refrigerator (qc/w where qc is the heat removed from the frozen food c..
Problem- 2 moles of the ideal gas nitrogen, N2, are compressed adiabatically, and the temperature of the gas rises from 25.0C to 40.0C. What are change in U and change in H, respectively, for this process
Carbon and silicon belong to the same group and are known to have similar properties. Do you think that silicon can replace the role that carbon
p4 white phosphorus ignites in air to make light heat and p4o10 according to the p4s 5o2g p4o10s reaction it is
What is the density of carbon dioxide gas inside a cylinder of CO2 pressurized to 21.8 atm at a temperature of 286 K? (R = 0.08206 L atm K-1 mol-1)
what mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.137 m
a chemist studying the properties of photographic emulsions needed to prepare 500 ml of 0.174 m agno3aq. what mass of
3.00×10-3 mol of HBr are dissolved in water to make 18.0 L of solution. What is the concentration of hydroxide ions, [OH^-], in this solution?
container a with 150ml contains a gas with an unknown pressure. container b with volume 250ml contains a gas under 628
A solid Silver Group (Anion) unknowon that contains only sodium ion as a catio is acidified and divided into tow portions, to both of which 6 M HC2H3O2
Write a blance equation with Cu, NaI, I2, and a drop of acetic acid to form CuO and CuCO3.Cu(OH)2.
A sample of helium gas occupies 945mL at 605 mmHg. For a gas sample at a constant temperature, determine the volume of helium at 745 mmHg?
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