Which part of the electromagnetic spectrum is nearest to x rays

Sugar, flour, and eggs cannot be separated. The materials' properties have changed, resulting in a chemical change.Therefore, crumbling a cookie is not a physical change.

What is physical change ?

Physical changes affect a chemical substance's form but not its chemical composition. Physical changes can be used to separate mixtures into their component compounds, but not to separate compounds into chemical elements or simpler compounds.

A chemical change is the transformation of one material into another, the formation of new materials with different properties, and the formation of one or more new substances. It occurs when one substance reacts with another to form a new substance.

A physical change is characterized by a change in physical properties. Melting, transition to a gas, change in strength, change in durability, changes in crystal form, textural change, shape, size, colour, volume, and density are all examples of physical properties.

Thus, crumbling a cookie is not a physical change.

To learn more about physical change, follow the link;

brainly.com/question/3680148

#SPJ2

Answer:

Because the sugar flour and eggs can no longer be separated. The properties of the materials have changed so it's a chemical change

Answer:

2

Explanation:

Edge 2021

Answer:

3

Explanation:

I wish you the best, its three or 2

The dilution of each tube are as follows;

• Tube 2; 8.26 × 10-³
• Tube 3; 7.5 × 10-⁴
• Tube 4; 6.83 × 10-⁵

For each time a dilution is further diluted;

The dilution ratio is; 1 : 11; In essence, 0.5 mL of agent was added to 5.0 mL of nutrient broth.

• For the first tube; dilution factor is; 1 : 11 = 9.1× 10-²

• For the second tube; 0.5mL of the first tube was added to 5.0mL of the nutrient broth; The dilution factor is then; (1/11) × (1/11) = 1/121 = 8.26 × 10-³.

• For the third tube; 0.5mL of the second tube was added to 5.0mL of the nutrient broth; The dilution factor is then; (1/11) × (1/11) ×(1/11) = 1/121 = 7.5 × 10-⁴.

• For the fourth tube; 0.5mL of the third tube was added to 5.0mL of the nutrient broth; The dilution factor is then; (1/11) × (1/11) × (1/11) × (1/11) = 1/14641 = 6.83 × 10-⁵.

Read more;

brainly.com/question/20885742

Answer:

Tube 2: 8.26 * 10^-3; Tube 4: 6.83 * 10^-5

Explanation:

In the serial dilutions for MIC test, the volume of nutrient broth in each tube should be equal: 5.0 mL. And the volume of agent in each dilution should also be similar: 0.5 mL.

The serial dilutions was as following:

• Tube 1: 0.5/5.5
• Tube 2: 0.5 mL of tube 1 was diluted with 5.0 mL broth. Then, the dilution of tube 2 is (1:11) * (1:11) = (0.5/5.5) * (0.5/5.5) = 1:121 = 8.26 * 10^-3
• Tube 3: We perform the similar calculation. Thus, the result is 1:1331 = 7.51 * 10^-4
• Tube 4: It is 1:14641 = 6.83 * 10^-5.

Answer:

Explanation:

# moles that exist in 1.9 X 10 23 =

             =  # of atoms/# of Avogadro 's num

             =    1.9 X 10 23 / 6.02x10 23

              = 0.266 mole of Pb

now we calculate the mass

   mass of lead = # mol x m.wt

                       =    0.266 X 106.4

                       = 28.30 gram

a device that measures the heat that is gained or lost in a chemical change.

information regarding calorimeter:

• calorimeter refers to the device for determining the heat creating at the time of  mechanical, electrical, or chemical reaction.
• Also, it measured the heat capacity of materials.
• Moreover, the heat should be gained or lost

Find out more information about the  Temperature here:brainly.com/question/7510619?referrer=searchResults

Answer:

it's A

Explanation:

I didn't it in a test and got an A I put b but got it wrong so it's A