You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred - True or False?

Explain with facts

How is heat transfered between frozen fish sticks in the oven?

A student uses a galvanic cell to determine the concentration of ethanol write a balanced equation for the overall reaction

How many moles of carbon are in 5.2 moles of C7H18?

An empty beaker weighs 39.09 g A) when completely filled with water, the breaker and its contents have a total mass of 388.15 g. what volume does the beaker hold? use d=1.00 g/mL as the density of the water.

Which chemical equation demonstrates the law of conservation of mass! F. 2NO + 02 - 2NO G. PA + 3Na - Na3P H. 4NH3 + 5024NO + 6H20 3. Nal + Cl2 + 12 + NaCl

A scientist studies the DNA of three different species. The DNA from species A is more similar to DNA from species B than DNA from species C. Which species are probably the most closely related? Explain your answer.

Gamma rays are waves of energy that have no charge. true false

Describe what a polar covalent bond is and name a common compound that has a polar covalent bond holding it together

Part a:we can determine the purity of solid materials by using calorimetry. a gold ring (for pure gold, specific heat = 0.1291 j⋅g-1⋅k-1) with mass of 10.5 g is heated to 78.3 ∘c and immersed in 50 g of 23.

How has desertification impacted the environment in Latin America?