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Chemistry
Chemistry
Middle School
.92 moles of carbon dioxide, CO2, was produced when you burned C6H120. (glucose) with O2.How many grams of water was also produced?CGH 120(s) + 6 O2(g) 6 CO2 (g) + 6 H20 (8)O moles to molesmoles to massmass to molesmass to mass
Chemistry
Middle School
Low air pressure can causeQuestion 5 options:clouds and precipitation to formthe temperature to dropa sunny dayfog
Chemistry
High School
________ is defined as the number of protons plus the number of neutrons. ________ is defined as the number of protons plus the number of neutrons. Atomic number Isotopic number Ionic number Mass number Nuclear number
Chemistry
High School
Cab someone pls help me? I don't understand this1.From Part 2 of the lab activity, plot a graph of volume vs. temperature (in kelvins) with the two data points that resulted from your experiment. Draw a straight line connecting the two points, thus assuming a linear relationship between volume and temperature.The x-intercept corresponds to where the volume would be zero and the temperature can be no lower, defined as absolute zero. Absolute zero is 0 K. Compare your results to those expected. How close to absolute zero was your intercept? Why might your value be different from absolute zero?
Chemistry
College
What is the percent yield of a reaction in which 51.5 g of tungsten(VI) oxide (WO3) reacts with excess hydrogen gas to produce metallic tungsten and 5.76 mL of water (d = 1.00 g/mL)?
Chemistry
College
Draw the structure of ozone according to VSEPR theory. What would be its associated molecular geometry?
Chemistry
College
The d-metals can be mixed together to form a wide range of alloys because: 1. the range of d metal radii is not very great. 2. the d-electrons interact strongly with each other. 3. the d-metals have low melting points. 4. the d-metals have a wide range of metal radii. 5. the nucleus is well shielded by the d electrons.
Chemistry
High School
At what speed, in meters per second, does the Moon recoil after the perfectly inelastic collision? The mass of the Moon is 7.36 1022 kg?
Chemistry
Middle School
Which phrase best describes the main reason scientist perform experiments
Chemistry
Middle School
Fe + _ H2SO4 _ Fe2(SO4)3 + _ H2
Chemistry
Middle School
What are the four main reservoirs of carbon
Chemistry
Middle School
Which of the following is true for a cell that has a nucleus? A. It will not have nuclear membrane. B. It will not have a nucleolus. C. It will not have ribosomes. D. It will not have a nucleoid.
Chemistry
Middle School
Which equation has both a liquid and a gas as products? 2 upper H g upper O (s) right arrow 2 upper H g (l) plus upper O subscript 2 (g). 2 upper M g (s) plus upper O subscript 2 (g) right arrow 2 upper M g upper O (s). 1 UJpper K upper C l upper O subscript 3 (s) right arrow 2 upper K upper C l (s) plus 3 upper O subscript 2 (g). Upper M g (s) plus 2 upper H upper C l (a q) right arrow upper H subscript 2 (g) plus upper M g upper C l subscript 2 (a q).
Chemistry
College
The sulfur atom of sulfur dioxide is considered to be sp2-hybridized. The expected bond angle is 120, but is actually slightly smaller (119). Write down the correct statement that explains the smaller bond angle.
Chemistry
Middle School
Consider the following intermediate chemical equations.What is the enthalpy of the overall chemical reaction?-205.7 kJ-113.4 kJ-14.3 kJ78.0 kJ
Chemistry
Middle School
why do we consider diamonds a kind of metamorphic rock?
Chemistry
College
Determine the equilibrium pH and speciation (concentration of each species) of the following two solutions. Neglect activity corrections. Species added Total concentration (solution a) HCl 10-3 M (solution b) NaCl 10-3 g.
Chemistry
College
Calculate the concentration of H3O+ of a solution if the concentration of OH- at 25C is 3.8 10-5 M and determine if the solution is acidic or basic.
Chemistry
Middle School
20 POINTS !!! Based on Gay-Lussac's law, which of the following statements is true for an ideal gas at constant volume and mole amount? a - the number of collisions is independent of pressure b - the number of collisions decreases with increase in pressurec - pressure is directly proportional to the absolute temperatured - pressure is inversely proportional to the absolute temperature
Chemistry
College
Why does the malachite green dye elute first? What physical properties does it have that affect its interaction with alumina and how are those different from crystal violet?
Chemistry
Middle School
3. Which planes velocity was greatest?
Chemistry
High School
If an oxygen nucleus consists of eight protons and eight neutrons, the charge on that nucleus is positive. Since even I learned in high school that like charges repel, such a nucleus would find all its positive protons repelling and quickly fall apart." How would you answer his argument?
Chemistry
High School
A concrete pile from a waterfront pier was pulled from the harbor water at port hueneme california. It's dimensions we're 14in x 14 in x 15in. a. What is the surface area expressed in square feet of a single face of the pile
Chemistry
Middle School
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide ?Carbon and oxygen are chemically bonded in it. Carbon and oxygen retain their original identity in it It can be separated into carbon and oxygen using physical methods The proportion of carbon and oxygen is different in different samples of the gas
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