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Thermochemistry In an experiment, it was found that a sample of gas having a mass of 39.2 grams required 614 J of heat to raise the temperature from 25.0 °C to 55.0 °C. What is the identity of the gas? specific heat values

Which element has the following electron configuration? [Kr] 5s2 4d10

Density Read the mass and determine the volume of an irregularly-shaped metallic object using the information in the attached image file.  Calculate the density from this information and identify the element from the list of densities below. Pt (platinum)  21.5 g/cm3 Fe (iron)            7.87 g/cm3 Ag (silver)        10.5 g/cm3 Al (aluminum) 2.60 g/cm3 Au (gold)         19.3 g/cm3 density volume displacement

Refer to Exam File: Geometries and HybridizationWhich molecule has resonance structures?

Temperature conversion Read the temperature on the Celsius scale in the attached file and convert to Fahrenheit.  An arrow has been added to this image to indicate where the reading should be made. Temperature scale

Significant figuresUsing the rules for significant figures and rounding numbers, select the correct answer to the following calculation for specific heat:c = q/mΔTwhere q = 321.01 J, m = 9.555 g, and ΔT = 21.0 ℃

Reaction A   CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) Reaction B   Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Reaction C   AgNO3 + NaCl → AgCl + NaNO3  Reaction D   HCl + NaOH → NaCl + H2O Reaction E   N2(g) + 3H2(g) → 2NH3(g) How many grams of H2O is produced in the combustion of 8.71 g of methane in excess oxygen? Molar Masses

Identify the electron configuration of the ion formed from sodiumNote that superscripts can not be formatted correctly in the answers (example: 1s2 is 1s2).

When someone speaks two languages, the languages stay totally separate in their brain and never influence each other.

Dynamic assessments allow for multiple levels of: