What type of change (physical or chemical) occurs when hydrogen bonds with oxygen to make water

How many total moles of ions are released when the following sample dissolves completely in water? 6.188 x 10 21 formula units of NiCl 2 a. 1.36 mol of ions b. 1.86 mol of ions c. 3.08 x 1022 mol of ions d. 0.0205 mol of ions e. 3.

What is critical mass?

Look at the chemical equation: Zn + 2HCl → ZnCl2 + H2 How many atoms of hydrogen (H) are present on both sides of the equation?

A 30.00 ml ba (oh) 2 solution of unknown concentration was neutralized by the addition of 32.83 ml of a 0.1382 m hcl solution. write the balanced molecular equation for the neutralization reaction between hcl and ba (oh) 2 in aqueous solution.

Chemical reactions differ from nuclear reactions because ... a. chemical reactions only involve electrons and nuclear reactions only involve protons. b. chemical reactions involve bonding and nuclear reactions involve releasing particles. c.

How much energy is required to heat 250 grams of water from 20.0°C to 80.0°C? The heat capacity of water is 4.186 J/g°C Q=mc∆T

The ph of a solution is measured to be ph=3. what is true of this solution?

The mole fraction of water in a solution of sugar in water is equal to 0.942. What is the mole fraction of the sugar?

How many protons are in chromium-58?

Which statement about the effusion rates of nitrogen and oxygen is true? Oxygen effuses 1.07 times faster than nitrogen. Nitrogen effuses 1.07 times faster than oxygen. Oxygen effuses 0.9 times faster than nitrogen. Nitrogen effuses 0.