A two metal alloy is 85% iron by mass. How many grams of manganese are found in a 36 gram sample of the alloy?

5.4g

Explanation:

Metal Alloy = Iron + Manganese

Composition of Iron = 85%

Mass of Alloy = 36 g

Mass of Iron =  85/100  * 36 = 30.6g

Mass of Manganese = Mass of Metal Alloy - Mass of Iron

Mass of Manganese  = 36g - 30.6 g =  5.4g

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".