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Describe the differences between physical change and chemical change in a material. Use examples related to the fire service to illustrate physical change and chemical change. Must be 300 words.
On the basis of their positions in the periodic table, select the atom with the larger atomic radius in each of the following pairs.
Explain how many mL of 0.95522 M hydrochloric acid are required to titrate 2.152 g of sodium carbonate to the equivalence point
If the -NO2 group is directly between the meta-xylene methyl groups and the -NH2 group is para to the -NO2 group, significantly different B/L basicity is observed for the -NH2 group than if the -NH2 grup is directly between the meta-xylene methyl ..
The pressure of 9.0 L of an ideal gas in a flexible container is decreased to one-sixth of its original pressure, and its absolute temperature is decreased to one-half of the original. What is the final volume of the gas
Blood pH can be altered by changes in breathing. When a person is hyperventilating, they are breathing in rapid, deep breaths.
what mass of Cu is electroplated by running 20.0A of current through
If 9.60 g of CuSO4 are left after heating 15.01 g of the blue compound, calculate the number of moles of water originally present in the compound.
Distinguishing between Organic Molecules, What chemical tests might be used to distinguish between: pentanal and 2-pentanone, between benzyl alcohol and diphenylmethanol?
Consider the following cell: Pt|H2(g, 0.645 atm)|H (aq, ? M)||Ag (aq, 1.00 M)|Ag(s) If the measured cell potential is 1.20 V at 25 °C and the standard reduction potential of the Ag /Ag half-reaction couple is 0.80 V, calculate the hydrogen ion con..
an element crystallizes in a body-centered cubic lattice. the edge of the unit cell is 2.69 and the density of the
Balance the following redox reaction as it occurs in the basic solution. What are the coefficients for OH^- an ClO^- in the balanced equation? Cr(OH)4^- (aq) _ ClO^- (aq) arrow CrO4^2- (aq) + Cl^- (aq)
The mixture of hot iron and aluminum is then dropped into 95.7 g of water at 20.0°C. Calculate the final temperature of the metal and water mixture, assuming no heat loss to the surroundings.
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