If food spoils is this a chemical or physical change?

Chemistry

2 answers:

Gwar [14]3 years ago

6 0

es un cambio químico

Explanation:

Porque es un cambio irreversible y cambia su naturaleza.

amid [387]3 years ago

4 0

Answer:

Chemical

Explanation:

It includes the breakdown of the food particles by the organisms. It experiences acidic response and the breakdown of food into easier structure.

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2Na+S→Na2S

Sedbober [7]

Answer:

2.0 moles S

Explanation:

To find the number of moles of S, you need to convert the moles Na to moles S via the mole-to-mole ratio. This ratio is represented by the coefficients in the balanced equation. Because you wish to find moles S, you want to put this number in the numerator. Because you want to eliminate the moles Na, this number should be in the denominator.

2 Na + 1 S ---> Na₂S

4.0 moles Na 1 mole S
---------------------- x --------------------- = 2.0 moles S
2 moles Na

3 0

3 years ago

A mass of one centigram is a mass of A 100g B 10 g C .01 g D 1000 g

____ [38]

Mass of 1 centigram is equal to 0.01 grams
So, option C is your answer!

Hope this helps!

4 0

3 years ago

Read 2 more answers

Name the following ionic compounds: (a) K2Cr2O7, (b) Li2C2O4, (c) CuNO3.

Elis [28]

Answer :

(a) The name of $K_2Cr_2O_7$ is, potassium dichromate.

(b) The name of $Li_2C_2O_4$ is, lithium oxalate.

(c) The name of $CuNO_3$ is, copper nitrate.

Explanation:

Ionic compound : It is a type of compound that is made up of the ions of the two different elements in which one element is a metal and another element is a non-metal.

(a) $K_2Cr_2O_7$

The given compound $K_2Cr_2O_7$ is an ionic compound. It is made up of two different ions which are potassium ion $(K^+)$ and dichromate ion $(Cr_2O_7^{2-})$ .

So, the name of $K_2Cr_2O_7$ is, potassium dichromate.

(b) $Li_2C_2O_4$

The given compound $Li_2C_2O_4$ is an ionic compound. It is made up of two different ions which are lithium ion $(Li^+)$ and oxalate ion $(C_2O_4^{2-})$ .