Balanced chemical for hydrochloride acid and sodium hydroxide

What elements are in the phone screen?

The table below gives the atomic mass and relative abundance values for the three isotopes of element M. Relative abundance (%) Atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 What is the average atomic mass (in amu) of element M? 2.86 5.

The pressure exerted on a sample of gas is 735 mm Hg with a volume of 375 mL and a temperature of 25 degrees Celsius. What would the pressure of the gas be if the temperature was reduced to standard temperature and the volume was expanded to 500.

How do scientists and engineers use scientific methods

A buffer that contains 0.123 M acid, HY, and 0.211 M of its conjugate base, Y-, has a pH of 8.67. What is the pH after 0.0018 mol of Ba (OH) 2 is added to 0.325 L of this solution?

Moles of Zn (NO3) 2 in 131.50g of this substance.

Each degree on the Kelvin scale equals: 1°C 10°C no relationship (different scale) 100°C

2C (s) + 2H2 (g) → C2H4 (g) : ΔH = + 52.4 kJ/mol Which statement about this reaction is correct?

A chemist dissolves 660. mg of pure hydroiodic acid in enough water to make up 300. mL of solution. Calculate the pH of the solution. Round your answer to 3 significant decimal places.

What type of radiation wave from the Sun does this graphic display? answer choices: x rays microwave visible ray infrared ray