Calculate the volume of a solution of 3.6 M NH4CI needed to prepare 350.0 mL of 1.24 M NH4CI. How many grams of ammonium chloride are in the solution you created? How many grams of ammonium carbonate are needed to prepare 1.75 liters of a 0.333 ...
Find the amount of K_2Cr_2O_7 required to prepare 100 ml of its 0.05 N solution. You have a 10 mg / mL protein solution. You take 50 mL of it and add this to 200 mL of buffer. What is the final concentration of the diluted solutio...
Calculate the moles in 7.98 grams of H2O. Converting Mass to Moles: Two quantities that are essential in quantitative chemistry are moles and mass. Both of these are used to express an amount of a particular substance, and are typically converted to one another during calculations. The substance...
{eq}A.\ Na_3PO_4\\ B.\ H_2S\\ C.\ (NH_4)_2C_2O_4\\ D.\ Mg(OH)_2 {/eq} Percent Composition: The amount of an element present in a molecule is given by dividing the atomic weight of that element from the molecular weight of the molecule m...
天内收到货款时： 借：银行存款 118000贷：应收账款 118000 超过 10 天收到货款：借：银行存款 120000贷：应收账款 118000财务费用 2000[例题 3]：甲公司为增值税一般纳税企业， 适用的增值税税率为 17%。2003年 3 月 1 日， 甲公司向乙公司销售一批商品，按价目表上标明的价格计算，其不含增值税的售...
Calculate the concentrations of each of the ions in {eq}\rm 0.25\ M\ Fe(NO_3)_2 {/eq}. a) {eq}\rm [Fe^{2+} ] {/eq}. b) {eq}\rm [NO_3^-] {/eq}. Molar Ratio: The molar ratio corresponds to the equivalent amount of one compound or eleme...
It can be observed that the expressions differ in how the units of the amounts of the solute and solution are expressed. Answer and Explanation: The percentage by mass of an element in a compound can be expressed as the mass of the element in gra...
A solution is a homogenous mixture composed of solute and solvent, where the latter is always present in a larger fraction. To express the relative amount of one over the other, we used concentration units. The most common concentration units are molarity, molality, per...