CHEMISTRY HIGH SCHOOL

The of an element is the total number of protons and neutrons in the______________________ of the atom.

Answers

Answer 1
Answer: the nucleus of the atom ....

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The solvent is usually referred to as the component of a solution which is present as

Answers

The solvent is usually referred to as the component of a solution which is present as the one with the larger quantity and in most cases as the liquid which dissolves a solid. In a solution, there are two components namely the solvent and the solute. The solute is the one in smaller amount.

Answer: Larger proportion

Explanation:

A binary solution is made up of two components , one of which is solute and another is solvent.

A solute is defined as the component which is present in smaller proportion. It can be in solid, liquid or gaseous phase.

A solvent is defined as the component which is present in larger proportion in a solution. It can be in solid, liquid or gaseous phase.

Hence, solvent is present in larger proportion.

What is the law of conservation of mass? How it is related to balancing chemical equations

Answers

The law of conservation of mass states that whatever goes in comes out the same. That's not the exact concept, but it'll help you remember it.

Here's another way of thinking about it.

Okay, so, we have:

Reactants  ⇒ Products

The reactants form into products, but stay the same.

What does this mean?

This means that the mass is conserved. When mass is conserved, the energy is also conserved.

In other words, nothing has changed.

Now, lets relate that to balancing equations.

When you try to balance an equation, what is your goal? ⇒ To get the reactants to equal the products..? Right?

Ah, yes!

Now we have the exact meaning→→→→

The law of conservation of mass states that mass is always conserved in a chemical reaction.

Hope I helped! Please feel free to comment with questions! :)
Law that states that mass is neither created or destroyed in ordinary chemical and physical changes.

What is the definition of half-life

Answers

Answer:

the time taken for the radioactivity of a specified isotope to fall to half its original value.

Explanation:

True or false: the Precision of a calculated answer is limited by the least precise measurement used in the calculation

Answers

The Precision of a calculated answer is limited by the least precise measurement used in the calculation is false.

what is Precision?

If the average value of different measurements is similar to the correct value of the measurement is said to be accurate and if the value of different measurements is close to each other then it is said to be precise.

The everage value of the different measurements may or not may be the same as exact and the resultant values must be the same as the calculated value for the precision of the result.

Therefore, the Precision of a calculated answer is limited by the least precise measurement used in the calculation is false.

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the precision of calculated answer is limited by the least precise measurement used in calculation

What can be said about the mass of a system when a change of state occurs? A) The mass of the system always increases during a change of state. B) The mass of the system always decreases during a change of state. C) The mass of the system remains constant during a change of state. D) The mass of the system varies depending on the type of change of state.

Answers

Answer:

C) The mass of the system remains constant during a change of state.

Explanation:

During a change of state (such as melting, boiling, or condensation), the mass of a closed system remains constant. This principle is based on the law of conservation of mass, which states that mass cannot be created or destroyed; it can only change forms or be transferred between components of the system

An LED lightbulb has an energy efficiency of 89%. This means that 11% of the electrical energy that goes into an incandescent lightbulb is used to produce light energy.Which statement best explains what happens to the other 11% of the electrical energy that goes into the lightbulb?


The leftover electrical energy is destroyed


The leftover electrical energy is transferred into heat energy


The leftover electrical energy is transferred into chemical energy


The leftover electrical energy is transferred into potential energy

Answers

Answer: The answer is The leftover electrical energy is transferred into heat energy.

Explaination: I took the test

Final answer:

The LED lightbulb converts 89% of the electrical energy it consumes into light. The leftover 11% of the electrical energy is predominantly converted into heat energy.

Explanation:

An LED lightbulb having an energy efficiency of 89% indicates that 89% of the electrical energy it consumes is converted directly into light. The remaining 11% does not disappear or get destroyed but is transformed into a different type of energy. According to the law of conservation of energy, energy cannot be created or destroyed; it can only be converted from one form to another. In this case, the remaining 11% of electrical energy is mostly converted into heat energy. Hence, the LED lightbulb gets hot when in use.

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