Is the following a chemical change or a physical change? A pencil is sharpened in a pencil sharpener, leaving behind shaving. Physical Change Chemical Change

Answers

Answer 1

Answer: This is an example of physical change, because the pencil's chemical composition does not change.

Answer 2

Answer: *Physical Change.*
A physical change in a substance doesn't change what the substance is.
A Chemical change, there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

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How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?
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A chemist has dissolved a certain substance in water the chemist knows that more of the substance could be dissolved into the water before it stops dissolving there for the current solution is a.) unsaturated b.) saturated c.) supersaturated

Why is chemistry important?

Answers

To study chemistry is to know the structures of bonds and the study of matter. When we study this, we learn about the pure substances and elements that are found on earth. The chemical equations are also important because it improves our math skills.

Answer:

Science chemistry is fundamental for meeting our essential requirements of food, clothing, cover, wellbeing, energy, and clean air, water, and soil. Synthetic advancements improve our personal satisfaction in various ways by giving new answers for issues in wellbeing, materials, and energy use.

Here are probably the best motivations to concentrate on science.

Science chemistry assists you with grasping your general surroundings. ...

Fundamental information on science assists you with perusing and comprehend item names.

Science can assist you with pursuing informed choices. ...

Science chemistry is at the core of cooking. ...

An order of science chemistry can assist with guarding you!

Explanation:

Science chemistry is fundamental for meeting our essential requirements of food, clothing, cover, wellbeing, energy, and clean air, water, and soil. Substance advances improve our personal satisfaction in various ways by giving new answers for issues in wellbeing, materials, and energy utilization.

Instances of Science chemistry in Regular day to day existence

Discolouration of Leaves

Food Processing

Normal Salt

Ice Drifting on Water

Creation of Tears While Slashing Onions

Sunscreen

Medications

Cleanliness

Baking Pop

Food Additives

Feelings

Espresso

Science chemistry will assist us with tackling numerous future issues, including practical energy and food creation, dealing with our current circumstance, giving safe drinking water and advancing human and natural wellbeing.

Viewed as the focal science chemistry , Science chemistry includes the investigation of how various substances change tones, shape, size and structures when responded with one more material or a bunch of substances. Besides, the utilization of different Parts of Science across various fields has prompted numerous disclosures and very good quality advancements which has helped humanity in either way. Understanding Science in day to day existence is significant in light of the fact that:

The food we eat, the beauty care products we use or the medications we take, these go through substance responses.

It can assist you with settling on choices connected with a great many things like watering plants in view of seasons, setting the temperature to prepare a cake, picking the right medication for causticity, applying a specific SPF sunscreen, and so on.

It assists you with understanding which component your body needs more. For example, some might require Vitamin D more than others

Infrequent participation in physical activity can lead toa. high blood pressure during exercise
b. muscle strain and soreness after exercise
c. extra calories burned during exercise
d. low heart rate after exercise

Answers

We can see here that infrequent participation in physical activity can lead to: b. muscle strain and soreness after exercise

What is physical activity?

Infrequent participation in physical activity can lead to muscle strain and soreness after exercise. When individuals are not regularly engaged in physical activity, their muscles may not be conditioned or accustomed to the stress and demands placed on them during exercise. As a result, they may experience muscle strain, micro-tears in the muscle fibers, and delayed-onset muscle soreness (DOMS) following physical activity.

It's worth mentioning that leading a sedentary lifestyle, which involves minimal physical activity overall, can have broader health implications beyond muscle strain and soreness.

Learn more about physical activity on brainly.com/question/13490156

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The reason the vapor pressure increases with increasing temperature is due to the increased kinetic energies of the gas molecules.TRUE
FALSE

Answers

True. More energy will mean the molecules will move faster, having more kinetic energy

Only smart people are allowed to answer ONLY smart people............... If you can answer this correctly then maybe you are actually yourself!!!Fill in the blanks: ______ compounds break up into ______ and ______ in solution, which can move freely and carry an _______ current.

Answers

Answer:

Fill in the blanks: IONIC compounds break up into ANIONS and CATION in solution, which can move freely and carry an ELECTRICAL current.

Which reaction occurs most rapidly at standard conditions?H2(g) + I2(s) 2HI(g)
Cu(s) + S(s) CuS(s)
C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(g)
5C2O42-(aq) + 2MnO4-(aq) + 16H+(aq) 10CO2(g) + 2Mn2+(aq) + 2H2O(l)
Ag+(aq) + I-(aq) AgI2(s)
NextReset

Answers

Answer : Option A) $H_(2)_((g)) + I_(2)_((s)) ----> 2HI_((g))$ .

Explanation : The reaction of hydrogen gas with iodine in solid phase will react most rapidly at standard conditions.

A rapid chemical reaction is one where reactants react fast with each other to give the products at the standard temperature and pressure conditions.

In the given choices Iodine is highly reactive as it belongs to the halogen group and also atomic hydrogen is very reactive in nature, when both combine it gives hydrogen iodide which is much stable in nature than the reactants.

when one mole of hydrogen reacts with one mole of iodine it produces 2 moles of hydrogen iodide.

$H_(2)_((g)) + I_(2)_((s)) ----> 2HI_((g))$ .

The reaction occurs most rapidly at standard conditions are:
H2(g) + I2(s) 2HI(g)

The reaction that do not occur rapidly at standard conditions are
Cu(s) + S(s) CuS(s)
C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(g)
5C2O42-(aq) + 2MnO4-(aq) + 16H+(aq) 10CO2(g) + 2Mn2+(aq) + 2H2O(l)
Ag+(aq) + I-(aq) AgI2(s)

A 25.5 liter balloon holding 3.5 moles of carbon dioxide leaks. If we are able to determine that 1.9 moles of carbon dioxide escaped before the container could be sealed, what is the new volume of the container?

Answers

Answer: The new volume of the container is 13.8 L

Explanation:

To calculate the new volume of the system, we use the equation given by Avogadro's Law. This law states that volume of the gas is directly proportional to the number of moles of the gas at constant pressure.

Mathematically,

$(V_1)/(n_1)=(V_2)/(n_2)$