The blank solution used to calibrate the spectrophotometer is 10.0 mL of 0.2 M Fe (NO3) 3 diluted to 25.0 mL with 0.1 M HNO3. Why is this solution preferred to simply using de-ionized water for the calibration?

In 1869 many chemists did not agree with mendeleev's periodic table. Three reasons why.

A mixture of sand (SiO2), sodium chloride (NaCl), and iron (Fe) filings had a mass of 30.126 g. After analysis this mixture was found to contain 15.976 g of sand and 3.455 g of iron. What is the mass percent (%) of sodium chloride in the sample?

As compared to the general population, twice the usual probability of schizophrenia has been correlated with: Group of answer choices Rh-positive mothers and Rh-negative baby girls. Rh-positive mothers and Rh-negative baby boys.

What is the ground-state electron configuration of a neutral atom of cobalt? express your answer in condensed form, in order of increasing orbital energy. for example, [he]2s22p2 would be entered as [he]2s^22p^2?

2 - A gas has a volume of 500 mL at a temperature of - 73.0 °C. What volume will the gas occupy at 27.0°C?

What is DNA? What information does it carry? Where is DNA located?

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O What mass of CH4 is required to completely react with 100 grams of O2?

Which of the following is the correct expression for the rate of the following reaction

What are example of dense things.

What is the difference between a subscript and a coefficient?