What does independent and dependent variable?

When is a hypothesis useful in science?

You need to make 10 mL of 2 mg/ml solution of protein and you have 25 mg/mL solution. How much protein solution and water do you need to mix in order to make the required solution?

Aluminum oxide (Al2O3) occurs in nature as a mineral called corundum, which is noted for its hardness and resis - tance to attack by acids. Its density is 3.97 g cm23. Calculate the number of atoms of aluminum in 15.0 cm3 corundum.

7. Explain if this statement is true: If the thermal energy of an object increases, so does the temperature.

What is meaning of trash

Ab2 has a molar solubility of 3.72*10-4 m. what is the value of the solubility product constant for ab2? express your answer numerically.

Thermal decomposition of sodium azide (NaN₃) into nitrogen gas and sodium metal is used to inflate car airbags. The reaction proceeds by the following chemical reaction. 2NaN₃ (s) ⟶3N₂ (g) + 2Na (s) How many grams of NaN₃ are need to inflate a 10.

Is salt water acidic, basic or neutral

The process of gathering knowledge about the natural world

4. Which of the following elements has the greatest electronegativity? a. Krypton b. Bromine c. Phosphorous d. Sulfur