What must you determine first when solving a word rproblem?

Alyssa is trying to balance the following equation: Pb (OH) 2 + 2H2SO4 = > PbSO4 + 2H20 What number should be used to replace the question mark (?) shown in the equation above to balance it? O a. 3 O b. 1 Oco O d. 2 Oe. 4

Calculate the mass of NaCl required to prepare 0.5 liters of a 2.5 molar solution of NaCl. 11 Na 22.99 Sodium 17 Cl 35.45 Chlorine A. 37.1 g B. 54.7 g C. 73.1 g D. 112.1 g

How many moles of glucose are contained in 8.3 x 10^21 molecules of glucose

Ca (OH) 2 + H2SO4 ⟶2H2O + CaSO4 What volume of 1.45 M Ca (OH) 2 is needed to react with 25.0 moles of H2SO4?

Diffusion bonding can be used to join (check the reference book before answer) : Group of answer choices Only metals, but the metals can be dissimilar Most combinations of metals and/or ceramics Only ceramics Only similar metals

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).

What compound will not give oxygen on heating

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?