What is the oxidation state of strontium in SrS? +1 -2 +2

Based on Law of Conservation of Mass: When you burn a candle, all that remains is a small puddle of wax. The puddle of wax has less mass than the original candle. The rest of the original candle's mass was: Destroyed Change to gasses Measured incorrectly None of above

What is the purpose for centrifuge? Let the two substances react completely Accelerate the reaction Mix the two substances Separate the two substances

What type of reaction is expressed below? CaO(s)+CO_(2)(g)arrow CaCO_(3)(s) Single displacement Decomposition Combination Double displacement

HBr(aq)+NaHCO_(3)(aq)arrow Express your answer as a chemical equation including phases. square A chemical reaction does not occur for this question. Part B NH_(4)Br(aq)+KOH(aq)arrow Express your answer as a chemical equation including phases. square D. chemical reaction does not occur for this question.

Calculate the enthalpy of formation of carbon disulfide given that the enthalpy of combustion of it is 110.2kJmol^-1 and those of sulfur and carbon are 297.4 kJ and 394.5kJ/g atoms respectively. C(s)+2S(s)arrow CS_(2)(l);Delta H=?

Which of the following is true for a system whose equilibrium constant is less than 1? A the equilibrium favors the reactants B the equilibrium factors the products C equilibrium will be reached relatively slowly D equilibrium will be reached relatively quickly

Which of the following cycloalkanes has the most angle strain? Select the single best answer. Cyclopentane Cyclobutane C Cyclohexane Cyclopropane

A chemical or combination of chemicals that prevents pH changes is called a square

Which statement about alcohol is not correct? Can dissolve membrane lipids Can be used as a degerming agent and antiseptic Can denature proteins Is typically used as a sterilizing agent

Hot Questions

Phosphorus reacts with iodine as shown in the chemical reaction below.What is the percent yield of the reaction if 28.2 g $Pl_{3}$ is obtained from the reaction of 48.0 g of 12 with excess phosphorus? $2P(s)+3I_{2}(s)\rightarrow 2PI_{3}(s)$ 51.7 g 51.48 51.5 g None of the above 51.98

Select the pair that has the larger atom or ion listed first. $Br^{-},Se^{2-}$ $S,S^{2-}$ $Cl,Cl^{-}$ $F^{-},Ne$ $P,P^{3-}$

What information do you need to look at on the SDS? There is 1 correct answer. Look at Section 2 - Hazards Look at Section 3 Composition / Information on Ingredients Look at Section 4 - First Aid Measures Look at Section 5 - Fire-Fighting Measures Look at Section 6 - Accidental Release Measures

Breaking bonds is hydrolysis. is dehydration synthesis. stores energy. is endergonic.

Which statements are true regarding reaction rates'[Select all that apply.] Larger activation energies are associated with faster reaction rates. Higher reactant concentrations are associated with faster reaction rates. Reducing the activation energy for a reaction increases its reaction rate. Reaction rates depend on how likely molecules are to collide in the correct orientation to react. Reactions that give off heat occur rapidly. Reactions that absorb heat occur rapidly. Large changes in enthalpy are associated with fast reaction rates. At high temperatures molecules are more likely to collide with enough energy to initiate a reaction. Two molecules must collide with one another to react.

If 5.00 g of gray iron powder reacts with 2.38 g of red phosphorus powder, what is the mass of the iron phosphide product? $\square $

How many oxygen molecules do we need to produce four molecules of water? a) 4 b) 2 C) 3 d) 1

6. How many hydrogen atoms are in the chemical formula $C_{6}H_{12}O_{6}$ o 6 24 18 12

What type of chemical reaction is illustrated in the following example? $FeBr_{3}(aq)+AgNO_{3}(aq)\rightarrow Fe(NO_{3})_{3}(aq)+AgBr(s)$ combination reaction decomposition reaction single-replacement reaction double-replacement reaction neutralization reaction

Foamers and defoamers work by affecting the __ of liquid/gas separation. Fill in the blank.