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Chemistry
Chemistry
High School
Please hurry!!!!!!!!!!Due tomorrow Which pair of properties describes the elements in Group 18?F They are chemically stable and liquid at room temperature.G They have eight valence electrons and are flammableH They are magnetic and boil at low temperatures.J They are gaseous at room temperature and chemically stable.
Chemistry
College
Based on the time and temperature data collected for the reaction of KMnO4 with either malonic acid or oxalic acid, one can conclude that generally as the temperature of a reaction is increased, the rate of the reaction increases. This is becaus:_________a. the activation energy is lowered and the reactant molecules collide with greater energy b. the activation energy is lowered and the reactant molecules collide more frequently c. the activation energy is lowered, the reactant molecules collide more frequently and with greater energy per collision d. the reactant molecules collide more frequently and with greater energy per collision
Chemistry
College
The rate law for a reaction can be derived from the: Select the correct answer below: stoichiometry of the overall reaction molecularity of the rate-determining step molecularity of the overall reaction none of the above
Chemistry
High School
The graph shows the volume of a gaseous product formed during two trials of a reaction. A different concentration of reactant was used during each trial, whereas the other factors were kept constant.Which of the following statements explains which trial has a lower concentration of the reactant? A: Trial 1, because the average rate of the reaction is lower. B: Trial 1, because this reaction lasted for a longer duration than Trial 2. C: Trial 2, because this reaction was initially fast and later slowed down. D: Trial 2, because the volume of product formed per unit time was higher.
Chemistry
College
What is a system called when neither energy nor matter is exchanged between the system and the surroundings? Closed system Free energy Isolated system Open system
Chemistry
High School
molecular formula of ammonium nitrite using cris method
Chemistry
College
you ned to make an aqeous solution of .139M aluminum nitrate for an experiment in a lab, using 300. ml volumetric flask. how much solid aluminum nitrate
Chemistry
College
The SALT I agreement in 1972 brought aboutO the creation of documents that officially ended the Cold War.O the US recognition of China for the first time since 1949. the regulation of Chinese production or missiles that carried nuclear weapons. the regulation of Soviet production of missiles that carried nuclear weapons.
Chemistry
College
Oxygen and hydrogen form the polyatomic hydroxide ion. What is its charge?
Chemistry
High School
Balance the following equations by inserting the proper coefficients.CH4 + O2 CO2 +H2OCaCl2 + AgNO3 Ca(NO3)2 +AgClC2H6O + O2 CO2 +H2O
Chemistry
College
Salts have varying solubilities in solvents such as water. Some salts dissolve well in water, whereas others are nearly insoluble. The solubility product Ksp is the equilibrium constant for the dissolution of a solid salt into water, and its magnitude is an indicator of the solubility of the salt.Barium sulfate, BaSO4, is used in medical imaging of the gastrointestinal tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail, is ingested by the patient, whose stomach and intestines can then be visualized via X-ray imaging. If a patient ingests 280mL of a saturated barium sulfate solution, how much toxic Ba2+ ion has the patient consumed?
Chemistry
High School
If the velocity of a body is decreased to 1/2, then K.E. of the body decreases to
Chemistry
College
How many grams of calcium chloride are needed to produce 10.0 g of potassium chloride?CaCl2(aq) + K2CO3(aq) 2 KCl(aq) + CaCO3(aq)
Chemistry
High School
Which statement is true about matter?a: all matter has volume b: all matter has massc: both A and B.d: all mater has either volume or mass but not both
Chemistry
High School
What type of molecule is shown below? A. AlkyneB. AlkeneC. AlkaneD. Aromatic
Chemistry
High School
A sample taken from a layer of mica In a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. How much potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years? A. 4.20 g B. 8.40 g C. 12.6 g D. 16.8 g the E. 25.2 g
Chemistry
High School
Question 15A 25.6 L sample of gas at 300 K is heated until its volume becomes 51.2 L.Assuming pressure is constant, what will be the final temperature of the gas?a. 500 kb. 600kc.300kd.150 k
Chemistry
College
How many seconds in day?
Chemistry
High School
during times of personal crisis we may feel the need to engage the services of a therapist to help us with out problemsfact or opinion and why
Chemistry
College
The absorption of infrared (IR) radiation results in vibrations in the molecules or ions that make up a chemical sample.a. Trueb. False
Chemistry
College
Our five senses can help us to recognize some of the physical properties of matter.TrueFalse
Chemistry
High School
The pressure of x mL of a gas was increased from 2 ATM to 3 ATM at constant temperature what will be the new volume?
Chemistry
High School
Which functional group is found in an ester?
Chemistry
High School
please help I will mark as brainliest!!and explain.what mass of copper(ii) oxide would react completely with 500cm3 of a 0.5M dilute sulphuric acid.
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