jordanprice1223 jordanprice1223

07-05-2018
Chemistry

contestada

While studying chemical and physical changes, students added salt to a glass of water. They stirred the salt until it dissolved and could no longer be seen. "That's a chemical change," Sarah stated. Do you agree? Explain. A) Yes, it is a chemical change because something new is formed. B) No, it is a physical change. It is salt and water and you can get the salt back by boiling off the water. C) Yes, it is a chemical change because there was a change in the appearance of one of the components, the salt. D) No, it is a physical change. A chemical change cannot occur when you mix two compounds together like salt, NaCl, and water, H2O, without adding heat.

Respuesta :

icedipping icedipping

07-05-2018

B. It's debatable if it's a physical or chemical change, because actual chemists don't have a hard distinction between the two.

Answer Link

1245247 1245247

07-05-2018

B. It's debatable if it's a physical or chemical change, because actual chemists don't have a hard distinction between the two.

Answer Link

Otras preguntas

a hedge fund purchased credit default swaps on securities it did not own because it believed that the securities were likely to default. in this example, the he

In the above diagram, the block is at static equilibrium on the ground. What is the value of the force exerted by the ground on the block if the force due to gr

When the abundance of different species in a taxon is poorly known the estimate of the number of species that are endangered in that taxon is likely to be?

Hola, Andrés, ¿cómo te va? ANDRÉS Bien, mamá. ¿Y a ti? MAMÁ También estoy bien. ¿Qué tal las clases? ANDRÉS En la clase de historia (1)

a perfectly market is one in which well-informed, price-taking buyers and sellers easily trade a standardized good or service.

A theater owner wants to provide enough seating for 786 people. The main floor has 24 rows of 20 seats in each row. If the balcony has 17 rows, how many seats

A downward-sloping demand curve means that the quantity demanded of a good and the price of that good are ________. a. inversely related b. the same amount c. n

Which of the following would be a good example of an observation in the scientific method process? O a researcher watching a chemical reaction and noting color

A flat work of art has two dimensions: ________ and width.

True or false: Scientific study can always be categorized as belonging to only one of the three major categories of sciences. True false question.