Other Chemistry Answers

Spectroscopic methods are based on the interaction of electromagnetism ration with matter.

a. What type of electrons in a molecule are generally involve in UV or visible radiation?

b. What is the necessary criterion for absorption to occur in the infrared region?

c. What types of molecular vibration are associated with infrared absorption?

250 cm³ of sodium hydroxide solution(NaOH) contains 2g of NaOH. Calculate the mass concentration and molar concentration of this solution. (Show ALL working using all relevant statements and upload a picture of your answer. Make sure you write your final answers with the correct units for molar and mass concentration). R.A. M.s Na=23 O=16 H=1 1 dm³=1000cm³ 

If it requires 75.0 mL of 0.500M NaOH to neutralize 165.0 mL of an HCI solution, what is the concentration of the HCI solution?

A 2.0 dm³ container contains 0.15 mol of N₂ gas and 0.20 mol of O₂ gas under a total pressure of 100 kNm⁻². Calculate the partial pressure of O₂ gas in the mixture.

Write T if the statement is true. If the statement is false, underline the word which makes it wrong and write the correct word on the space provided.

__________1. H2 is a polar molecule.

__________2. Water has a trigonal planar molecular geometry.

__________3. Asymmetric covalent compounds are usually nonpolar.

__________4. A molecule in which its central atom has 2 lone pairs and 3 bonding pairs of electrons has a T-shape molecular geometry.

__________5. The central atom in the compound SF6 should be fluorine.

How many sodium atoms are there in one mole of Na atoms?

Assignment- Calculate the molar concentration of HCl (Hydrochloric acid) based on titration

A gas mixture contains 4.0 g of CO(g), 11.0 g of CO₂(g) and 2.0 g of CH4 (g) in a 50.0 - L

vessel. Calculate the partial pressure of each gas in the mixture.

What is the pH of a 0.055 M of HBr solution?

How many moles of magnesium is 3.01 x 1022 atoms of magnesium