Recent questions tagged chemistry

+13 votes

1 answer

According to one acid-base theory a molecule acts as an acid when the molecule

asked Jun 4 by answerscourse (100 points)

+3 votes

1 answer

What is the rate constant of a reaction if rate = 1.5 (mol/L)/s, [A] is 1 M, [B] is 3 M, m = 2, and n = 1? k= rate [A]" [B]" A. 0.17 B. 13.5 C. 0.5 D. 4.5

asked Jun 4 by answerscourse (100 points)

+6 votes

2 answers

100 POINTS +BRAINLIEST PLZ ANSWER ASAP Eduardo looks at stars through his telescope. He says that the star Sirius is brighter than the star Rigel. In reality, Rigel has a greater absolute brightness than Sirius. What can explain

asked Jun 4 by answerscourse (100 points)

+14 votes

1 answer

SERIOUS ANSWERS ONLY! Explain the damage that can be caused by performing presumptive drug tests as confirmatory tests, making sure to cite one specific example to support your explanation. Proper spelling, grammar, and sentence s

asked Jun 4 by answerscourse (100 points)

+13 votes

1 answer

What is the molecular formula of aluminum chloride containing 20.2% by mass of aluminum and 79.8% My mess of chlorine. The relative molecular mess is 267 g.

asked Jun 4 by answerscourse (100 points)

+6 votes

1 answer

A gas has an initial volume of 2.4 L at a pressure of 1.5 atm and a temperature of 273 K. The pressure of the gas increases to 4.5 atm, and the temperature of the gas increases to 313 K. What is the final volume of the gas? 0.70 L

asked Jun 4 by answerscourse (100 points)

+2 votes

2 answers

In the gaseous state, chlorine exists as a diatomic molecule cl2 (molar mass = 70.9 g/mol). calculate the number of moles of chlorine present in 130 g of chlorine gas.

asked Jun 4 by answerscourse (100 points)

+3 votes

2 answers

Calculate the mass of oxygen produced from the decomposition of 75.0 g of potassium chlorate?

asked Jun 4 by answerscourse (100 points)

+7 votes

1 answer

Complete combustion of 1.00 g of the hydrocarbon pagodane gives 3.38 g carbon dioxide. what is the empirical formula of pagodane?

asked Jun 4 by answerscourse (100 points)

+3 votes

2 answers

Which could cause topsoil to be lost? A)wind and water erosion B)lack of use C)compaction D)desertification

asked Jun 3 by answerscourse (100 points)

+15 votes

2 answers

Which statement best describes london dispersion forces? a: repulsive intramolecular forces b: attractive intramolecular forces c: repulsive intermolecular forces d: attractive intermolecular forces

asked Jun 3 by answerscourse (100 points)

+7 votes

2 answers

Determine the best formula for reacting elements. calcium and iodine a. cal b. cal2 c. ca2l d. ca2l2

asked Jun 3 by answerscourse (100 points)

+7 votes

2 answers

Which material is very strong and tough but shows very little elongation as it absorbs energy? spider silk rubber kevlarÂ® concrete

asked Jun 3 by answerscourse (100 points)

+7 votes

2 answers

An atom's lewis dot structure has three dots. which of the following elements could it be, and why? aluminum, because it is in group 13 and has three valence electrons. lithium, because it is a group 1 element with three total el

asked Jun 3 by answerscourse (100 points)

+13 votes

2 answers

B) calculate the ratio of moles of h2o to moles of anhydrous kal(so4)2. note: report the ratio to the closest whole number. (show all work including units)

asked Jun 3 by answerscourse (100 points)

+13 votes

1 answer

What is the chemical name of the covalent compound P4O9? A. tetraphosphorus nonaoxygen B. tetraphosphate nonoxygen C. tetraphosphide nonaoxide D. tetraphosphorus nonoxide

asked Jun 3 by answerscourse (100 points)

+10 votes

1 answer

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2â€¢2h2oÂ Â Â Â Â sncl2â€¢4h2oÂ Â Â Â Â sncl

asked Jun 3 by answerscourse (100 points)

+4 votes

1 answer

Consider two gases oxygen and nitrogen at stp. how old the kinetic energy of the gases be affected if we only increase the temperature of oxygen

asked Jun 3 by answerscourse (100 points)

+12 votes

1 answer

A student places a small amount of water in a glass dish and then carefully places a small paperclip on the surface of the water. The paperclip floats. What happens if the student adds a drop or two of dish soap to the water? Expl

asked Jun 3 by answerscourse (100 points)

+9 votes

1 answer

Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. kclo3(s) â†’ kcl(s) + o2(g) [unbalanced] what mass of oxygen gas is formed if 26.4 g of potassium chlorate decompo

asked Jun 3 by answerscourse (100 points)

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