Why is it important to close the container of sodium borohydride after use?

What does a ka value of approximately 1 show about the equilibrium? A. Very little of the acid has dissociated. B. The solution can act as both an acid and a base. C. The acid has completely dissociated. D. Some of the acid has dissociated.

How to calculate the mass of solid sodium hydroxide needed to prepare 200 ml of a 0.040m solution. if one pellet of sodium hydroxide weighs 0.170g, how many pellets should be dissolved?

Which of the following statements is true of asexual reproduction? A. Offspring have different combinations of genes ... B. Offspring have half of their genes from the male parent. C. Offspring have the same genes as the parent. D.

suppose that 0.05 g of NaHCO3 reacts with 0.05 g of HCI and the reaction bubbles due to the carbon dioxide being produced. if the substance produced are 0.04 g water and 0.03g of salt how many grams if carbon dioxide gas were produced

Which sub-atomic particle is positively charged and found in the nucleus? a. proton b. neutron c. electron d. beta particle

What is the connection between chemistry and synthetic materials?

The density of gold is 19.3 g/cm3. What is the volume of a 575 gram bar of pure gold?

How man kilo-calories of heat are required to raise the temperature of 225 g of aluminum from 20 C to 100 C? 0.59 kcal 3.8 kcal 38 kcal 85 kcal

In the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many grams of hydrogen gas will be produced from 125.0 milliliters of a 6.0 M HCl in an excess of Mg

An element has an atomic number of 92 and a mass number of 234, how many neutrons are there?