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Questions in chemistry

[Sagot para sa’yo] what is an endothermic reaction

[Sagot para sa’yo] Section A: Find Chiral Centers and Determine R/SFind the chiral centers in each of these molecules with "alternativeuses" and determine R/S for each chiral center.​

[Sagot para sa’yo] What are the 3 states of matter

[Sagot para sa’yo] why does schiff’s test require alkaline solution

[Sagot para sa’yo] 1.A complexometric analysis of Ca2+ ion has been made to estimate the concentration of the said ion in 5.00-mL sample of milk. The sample was diluted to 100.0-mL and a 20.0-mL aliquot was taken and added with 20.0-mL 0.0500 M EDTA. About 10.0-mL of ammonia buffer and another 50.0-mL of distilled water were added in the solution. ErioT indicator was also added giving a blue color solution. After the reaction of Ca2+ and EDTA has taken place, the excess EDTA was titrated with standard 0.0250 M MgCl2 to pink endpoint. The required volume of titrant is 11.3-mL. Calculate % Ca (40.078 g/mol).

[Sagot para sa’yo] Determine the pH of a solution that is 0.100 M in acetic acid (HC2 H3 O 2 ) and 0.100 M in sodium acetate (NaC2 H3 O 2 )

[Sagot para sa’yo] What is the percent composition by mass of sulfur (S) in the compound MgSO4? * 20.22% 26.64% 19.85% 28.64%

[Sagot para sa’yo] The compound Aluminum Chloride has 1 aluminum atom and 3 chlorine atoms. This compound can be represented by the chemical formula Responses A Al3ClAl 3 Cl B Al3Cl3Al 3 Cl 3 C AlClAlCl D AlCl3

[Sagot para sa’yo] A scientist Uses electricity to break down water into hydrogen gas and oxygen gas. Which statement best explains what happens? A. A chemical change occurs B. A physical change occurs C. A base neutralizes acid. D. An acid neutralizes a base.

[Sagot para sa’yo] When a salt dissolves in water, it absorbs 130J of heat from the surroundings and does 45 J of work on the surroundings. What is the change in internal energy of the solution? AE=q+w 52. (Write all the given quantities.) 53. AE=?