What is the mass of NaCl required to make 160 grams of a 12% solution of NaCl in

water?

1) 18 grams

2) 19 grams

3) 22 grams

4) 24 grams

Phenol red is a ph indicator routinely used to monitor the ph of solutions in laboratories. It is reddish-orange in neutral solutions, yellow in acidic solutions, and magenta in basic solutions.

Methane burns in oxygen to produce carbon dioxide and water. Which of the following represents a preliminary, unbalanced equation with the correct chemical formulas? 1. CH4 + O2 → CO2 + H2O 2. CH4 + CO2 → O2 + H2O 3. CO2 + H2O → CH4 + O2 4.

How many co2 molecules are produced for each glucose that is catabolized completely by glycolysis, the citric acid cycle, and the electron transport chain?

Consider formula A to be v = StartFraction 2 pi r over T EndFraction and formula B to be v2 = GStartFraction 2 pi r over T EndFraction. Write the letter of the appropriate formula to use in each scenario.

Which quantity is held constant when working with Boyle's, Charles's, and Gay-Lussac's laws? volume moles pressure temperature

How can a molecule such as bcl3 act as an acid if it has no protons to donate?

If a sample of this compound contains 6.4*1022 sodium ions, how many sulfide ions does it contain?

In a coffee-cup calorimeter, 0.00500 mol of mg is reacted with enough hno3 to produce 100.0 ml of solution. the reaction is shown below: mg (s) + 2 hno3 (aq) → mg (no3) 2 (aq) + h2 (g) the temperature of the solution rose from 25.0°c to 30.5°c.

How much energy, in joules, does 150.0 g of water with an initial temperature of 25 C need to absorb be raised to a final temperature of 75 C

Predict how heat would flow if beaker a is moved so that it is touching beaker b