CHEMISTRY
HIGH SCHOOL

Answer: Following the Law of Conservation of Mass, you simply add the mass of both substances. Thus, 160 grams + 40 grams = 200 grams. So, even if initially, they are in liquid and solid form, they would still have the same mass even if they change phases, owing to that they are in a closed space.

Answer:

Answer:

200 grams, because all the atoms remain in the balloon or flask.

Explanation:

I got a 95 on usatestprep

MIDDLE SCHOOL

Compare 51.5 hectograms to 51,500 decigrams. How do each of these values compare to a gram, and which represents a larger mass?

Well all I know is that a hectogram is bigger than a decigram. Hoped that helped :)

HIGH SCHOOL

The law of conservation of mass and how it applies to chemical changes

According to law of conservation of mass, mass is neither created nor destroyed and hence for a chemical reaction the mass of reactants and products is equal.

What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.

Learn more about law of conservation of mass,here:

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The law of conservarion of mass states that mass can neither be destroyed nor created, but only changed into other forms. So through chemical reactions, the chemical makeup may change but the amount of substance is still equal to the sum of the amount of original chemicals before the reaction.

HIGH SCHOOL

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. This simple process is which kind of a change?

a physical change for plato answer

HIGH SCHOOL

The concentration of a dilute aspirin solution is 0.000526 m. standard solutions of this compound were used to prepare a beer\'s law plot which gives a slope of 1550.3 m-1. what is the expected absorbance value for the aspirin solution?

The expected absorbance value for the aspirin solution is 0.815

Beer Lambert's lawFrom the question, we are to determine the expected absorbance value for the aspirin solution

From the Beer Lambert's law formula, we have that

A = εbc

Where A is the absorbance

ε is molar absorptivity

b is the path length

and c is the concentration

The Beer's law equation conform to the equation of a straight line, where εb is the slope of the line

Then, we can rewrite the equation as

A = mc

Where m is the slope

Now, from the given information

c = 0.000526 M

and m = 1550.3 M⁻¹

Putting the parameters into the formula, we get

A = 1550.3 × 0.000526

A = 0.8154578

A ≅ 0.815

Hence, the expected absorbance value for the aspirin solution is 0.815

Learn more on Beer Lambert's law here: brainly.com/question/12975133

Answer:

0.815.

Explanation:

- We should mention Beer's law:

A = ∈bC.

Where, A is the absorbance of the solution.

b is the cell length of the cuvette.

C is the concentration of the solution.

- The calibration curve is a relation between A and C has a slope of (∈b).

We have C = 0.000526 M and a slope of (∈b) = 1550.3 M⁻¹.

∴ A = ∈bC = (1550.3 M⁻¹)(0.000526 M) = 0.815.

MIDDLE SCHOOL

What device increases voltage? a. generator b. motor c. step-down transformer d. step-up transformer

The answer is step-up transformer. D

the answer is step-up transformer. D

HIGH SCHOOL

One reason the bohr model of the atom failed was because it did not explain why

Bohrs' model of an atom failed because he didn't explain the bonding in molecules

Hope this helps :)

HIGH SCHOOL

An original sample of K-40 has a mass of 25.00 grams. After 3.9 × 109 years, 3.125 grams of the original sample remains unchanged. What is the half-life of K-40?

(1) 1.3 × 109 y (3) 3.9 × 109 y

(2) 2.6 × 109 y (4) 1.2 × 1010 y

Answer:

La respuesta correcta es

Explanation:

Hello! Let's solve this!

First we have to know the mass / mass exponent without changes

The data is:

m = 25 g

mc (mass without changes) = 3.125g

25 / 3,125 = 8 =

The exponent is 3, so we divide the number of years by three.

La respuesta correcta es

(1) 1.3*10^9 years

HIGH SCHOOL

Consider the chemical reaction in equilibrium. H2 + I2 + heat mc006-1.jpg 2HI What will happen to the chemical equilibrium if the temperature of the system is increased?

To predict the change or shif t in equilibrium, we use Le Chatelier's Principle. The reaction absorbs heat or is endothermic so that heat is being supplied for it to proceed. If the temperature of the system is increased, the equilibrium would continue to the right or to producing more of the products since heat is added continuously.

MIDDLE SCHOOL

Think of a resource and predict What happens to the resource when competition for it increases

Lets say foxes hunt rabbits. If their are too many foxes then they will compete for the rabbits. The rabbits get outnumbered by the amount of foxes so the foxes kill all the rabbits and the rabbits could eventually go extinct.