Water flows smoothly through the pipe shown in the figure, which gets progressively wider as it descends in elevation from sections 1 and 2 down to sections 3 and 4. The water flow speed is _____ and the pressure is _____.
A block of plastic has a mass of 50 g and a volume of 40 cm3…
A block of plastic has a mass of 50 g and a volume of 40 cm3. Will the block sink or float in water ( ρ = 1.0 g/cm3)? It will _____.
When 35.0 g of water is cooled by 40.0 °C, how much heat is…
When 35.0 g of water is cooled by 40.0 °C, how much heat is released?
The following reaction is an example of an _______ reaction….
The following reaction is an example of an _______ reaction. 2N2(g) + O2(g) → 2N2O(g) ΔHrxn = +163.2 kJ
A solution that has [H3O+] = 6.7×10-10 M is:
A solution that has = 6.7×10-10 M is:
The signs of q and w for an exothermic reaction are _______,…
The signs of q and w for an exothermic reaction are _______, respectively.
Consider the reaction below: Fe + Br2 → FeBr2…
Consider the reaction below: Fe + Br2 → FeBr2 If 44.2 g of iron reacts with an excess of bromine gas, what mass of FeBr2 can form? (Hint: FeBr2 = 215.65 g/mol)
From the balanced equation, Zn + S → ZnS, a chemist calculat…
From the balanced equation, Zn + S → ZnS, a chemist calculates that 6.41 g of zinc sulfide should be obtained. However, the chemist isolates only 5.01 g of product. What is her percent yield for this reaction?
What is the mass of 1.6×1021 argon atoms?
What is the mass of 1.6×1021 argon atoms?
Which of the chemical pairs below CANNOT produce a Brønsted–…
Which of the chemical pairs below CANNOT produce a Brønsted–Lowry acid/base reaction between them?