Variable that stays the same

The density of a test tube is 2.3g/cm3. The volume of the test tube is 4 cm3. What is the mass of the test tube? A. 0.92 g B. 9.2g C. 9.3g D. 92g

What mass of sodium sulfate is needed to make 2.5 L of 2.0 M solution? A 120 g B 150 g C 180 g D 710 9 E 750 g

Look at the table shown above; what evidence supports the conclusion that pigs gain more weight from feed that has more corn than wheat?

Is the formula FE a element, compound, or molecule

Which of the following statements is inaccurate? A. The electronic structure of an atom or ion being oxidized doesn't change during the reaction. B. Oxidation includes a loss of electrons from an atom or ion. C. Oxidation comes before reduction. D.

Sodiun atom, potassium atom, and cesium atoms have the same?

A molecule is what?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?

The reaction A+B-> C+D rate=k[A][B]^2 has an initial rate of 0.0810 M/s. What will the initial rate be if [A] is halved and [B] is tripled? What will the initial rate be if [A] is tripled and [B] is halved?

What is the chemical formula for coper (ll) hydroxide?