(5) matter and energy. the student knows that matter has physical properties and those properties determine how it is described, classified, changed, and used. the student is expected to:

Answers

Answer 1

The student is expected to classify matter by physical properties, including shape, relative mass, relative temperature, texture, flexibility, and whether material is a solid or liquid.

Flexibility is the ability of a joint or series of joints to move through an unrestricted, pain free range of motion. Although flexibility varies widely from person to person, minimum ranges are necessary for maintaining joint and total body health.

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Related Questions

Which chemical reaction is most likely the slowest?
A. Red blood cells exchange oxygen molecules for carbon dioxide
molecules.
B. Oxygen produced by plants changes the pH of an aquarium's
water.
C. Chlorophyll in plants absorbs sunlight and converts it to chemical
energy
D. Rocks are eroded by acid rain.

Answers

Answer:

D

Explanation:

The chemical reaction is most likely the slowest will be rocks are eroded by acid rain.

What is chemical reaction?

A chemical reaction occurs that involves the chemical change of one group of chemical compounds into another series of chemical substances.

What is acid rain?

Acid rain was the rain that has an overabundance of acids.

The chemical reaction is most likely the slowest will be rocks are eroded by acid rain.

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HOW MANY MILLILITERS ARE IN 98.1 M? WHAT IS THE UNIT?

Answers

Answer:98.1 meters = 98,100 mm

Explanation: 1 meter = 1,000 mm.

What happens when an object
returns to its original shape-does it
still have elastic energy?

Answers

Answer:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic object. The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process. The deformation could involve compressing, stretching, or twisting the object.

A meniscus must be considered when making which of the following measurements?

Answers

Answer:

When you read a scale on the side of a container with a meniscus, such as a graduated cylinder or volumetric flask, it's important that the measurement accounts for the meniscus. Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus. For a flat meniscus, make sure the liquid is level. Usually placing the container on a lab bench does the trick.

You won't be able to take an accurate reading looking up at the liquid level or down into it. Get eye level with the meniscus. You can either pick up the glassware to bring it to your level or else bend down to take measurements in situations where you're concerned with dropping the container or spilling its contents.

Use the same method to take measurements each time so that any errors you make will be consistent.

Explanation:

HELP PLEASE 100 points!!!

Answers

Answer:

by the looks of it the answer you have is correct

Explanation:

Answer:

The answer B

.

Explanation:

Use the Venn Diagram below to identify where the listed characteristics belong.

Answers

The atom's nucleus is composed of neutrons and protons. BOTH: In the nucleus. Contribute to the mass of the atom. Mass equal 1 amu. PROTON. Number is atomic number of element. Determine the identity of the atom. NEUTRON: Neutral charge.

What is a subatomic particle?

Subatomic particles are matter structures that are smaller in size than an atom. Hence, subatomic particles compose the atoms, determining their properties.

Many subatomic particles are unstable and remain unknown. However, three of them are the most stable ones,

protons electronsneutrons

Subatomic particles can be either,

compound ⇒ divisible ⇒ protons and neutronelementary ⇒indivisible ⇒ electrons

Neutrons and protons compose the nucleus of the atoms, while electrons orbit around them.

These particles differ in their electric charge and their mass.

Protons have a positive charge (+)Neutrons have no charge (0)Electrons have a negative charge (-)

The number of protons in the atom is the atomic number and determines the atom's identity.

The massic number is the addition of the number of protons and the number of neutrons.

Atomic mass is composed of neutrons and protons mass. It is not the same as the massic number or the atomic weight.

When protons, neutrons, and electrons get together to form an atom, they lose part of their mass as energy. This is why the atomic weight is slightly inferior to the sum of masses.

1) BOTH

In the nucleus

Contribute to the mass of the atom

Mass equal 1 amu (1.67377 x 10⁻²⁷ kg or 1.67377 x 10⁻²⁴ g)

2) PROTON

Number is atomic number of element

Determine the identity of the atom

3) NEUTRON

Neutral charge

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Reyna is making a mixture of lithium chloride (LiCl)) and water (H2O). The lithium chloride completely dissolves in the water, LiCl (aq). What is the solvent?

Answers

Answer:

Water

Explanation:

The solvent that formed this mixture is the water. The solute is lithium chloride.

A solvent is the fluid medium which allows a solute to dissolve. A solute is a solid substance which is dispersed in the solvent

Since the solvent is the dissolving medium, it is stated in the problem that lithium chloride completely dissolves in the water.

Therefore, the water is the solvent.

If an exothermic reaction heats a calorimeter with a total mass of 10 grams from 20°c to 30°c what is the total enthalpy change for the reaction? assume that the specific heat capacity of the system is 2 j/g⋅k.

Answers

The total enthalpy change for the reaction is 200 J.

During an exothermic reaction, heat is released from the system which leads to an increase in its temperature.

The enthalpy change during an exothermic reaction is given by the equation,

Q= m × S × ΔT

Here, Q ⇒ Enthalpy change during a reaction

m ⇒ Mass of the substance

S ⇒ Specific Heat Capacity of the system

ΔT ⇒ Change in temperature of the system

On applying the given values in the above equation, we get the value of enthalpy as

Q= 10 x 2 x 10

  = 200 J.

Hence, the total enthalpy change for the reaction is 200 J.

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An organism can occupy more than one niche in an ecosystem

A) True
B) False

Answers

Answer T

Explanation:

Consider this reaction: Upper K Upper O Upper H + Upper H Upper B 4 right arrow Upper K Upper B r + Upper H Subscript 2 Baseline Upper O

Which is the acid in this reaction?

KOH

HBr

KBr

H2O

Answers

Hbr is the answer when I work it out that’s what I got.

Answer:

HBr

Explanation:

Is the Food Pyramid important to Humans and our Digestive Systems? Explain why or why not below please use a complete sentence, or put what the one thing that we cannot digest but is in the food pyramid.

Answers

Answer:

The food pyramid is just to make people have a healthier "Diet."

Explanation:

It shows the food groups we eat and which ones to put together to make a healthy diet. Eating the right amount of each food group is called a "Balance" diet. Therefore, its not needed, but it is useful.

On December 25th, 1776, General George Washington’s Continental Army crossed the Delaware River and defeated troops of Hessians (German soldiers fighting for the British). Here’s a fictionalized account of that historical event: “While our general stood bravely in the Christmas Day cold, I shivered from more than just the icy wind. Beyond the river were enemy soldiers from the most obscure corners of Europe. I could barely fathom the unknown monsters ahead.” How did the fiction author make the factual account more exciting? A The author altered the chronology of the historical events. B The author omitted the factual details, because readers already know them. C The author enhanced the drama by altering the description of the enemy troops. D The author created a sense of danger by changing the setting of the event.

Answers

Answer:the answer is C

Answer:

C

Explanation:

I'm doing this test now and I just got it right :)

The pressure of a gas in a tank is 3.20 ATM at 22.0°C if the temperature is increased to 60.0°C what will the new pressure in the tank be

Answers

Answer:

P₂ = 3.61 atm

Explanation:

Given data:

Initial pressure of tank = 3.20 atm

Initial temperature = 22.0°C

Final temperature = 60.0°C

Final pressure = ?

Solution:

Initial temperature = 22.0°C (22.0 +273 = 295 K)

Final temperature = 60.0°C (60 +273 = 333)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

3.20 atm / 295 K = P₂/333 K

P₂ = 3.20 atm × 333 K / 295 K

P₂ = 1065.6 atm. K /295 K

P₂ = 3.61 atm

Answer:

The answer is 3.61

Explanation:

reI did all the math and everything, the pressure is 3.61

please help find the significant figure when the mass is converted to mg

Answers

4 significant figures. The rest of the zeros are trailing zeros

student carries out a titration to determine the concentration of a solution of
nitric acid. She titrates the solution of nitric acid against a standard solution
of sodium hydroxide with a known concentration of 0.0998 mol/dm². She
finds that 21.80 cm of the nitric acid solution is needed to exactly neutralise
25.0 cm of the sodium hydroxide solution.
Calculate the concentration of the nitric acid solution. Give your answer to
three significant figures.
The equation for the neutralisation reaction is
HNO3 + NaOH → NaNO3 + H2O​

Answers

The concentration of the Nitric acid solution : 0.114 M

Further explanation  

Titration is a procedure for determining the concentration of a solution (analyte) by reacting with another solution whose known concentration (usually a standard solution) is called the titrant. Determination of the endpoint/equivalence point of the reaction can use indicators according to the appropriate pH range  

Titrations can be acid-base titration, depositional titration, and redox titration. An acid-base titration is the principle of neutralization of acids and bases  

Reaction

HNO₃ + NaOH → NaNO₃ + H₂O​

Concentration a standard solution  of sodium hydroxide :  0.0998 mol/dm³ , and the volume = 25 cm³

moles NaOH=

[tex]\tt mol=M\times V\\\\mol=0.0998\times 25\\\\mol=2.495~mlmoles[/tex]

From the equation, mol ratio HNO₃ : NaOH = 1 : 1, so mol HNO₃ = mol NaOH=2.495 mlmoles

The volume of HNO₃ = 21.8 cm³, so the concentration :

[tex]\tt M=\dfrac{n}{V}\\\\M=\dfrac{2.495}{21.8}\\\\M=0.114[/tex]

The concentration of the nitric acid solution is 0.11445 mol/dm³

From the question,

We are to calculate the concentration of the nitric acid solution

The given balanced chemical equation for the reaction is

HNO₃ + NaOH → NaNO₃ + H₂O​

This means 1 mole of HNO₃ is needed to completely neutralize 1 mole of NaOH

Using the formula

[tex]\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}[/tex]

Where [tex]C_{A}[/tex] is the concentration of acid

[tex]C_{B}[/tex] is the concentration of base

[tex]V_{A}[/tex] is the volume of acid

[tex]V_{B}[/tex] is the volume of base

[tex]n_{A}[/tex] is the mole ratio of acid

[tex]n_{B}[/tex] is the mole ratio of base

From the given information

[tex]C_{B}= 0.0998\ mol/dm^{3}[/tex]

[tex]V_{A} = 21.80 \ cm^{3}[/tex]

[tex]V_{B} = 25.0 \ cm^{3}[/tex]

From the balanced chemical equation

[tex]n_{A} = 1[/tex]

[tex]n_{B} =1[/tex]

Putting the parameters into the formula, we get

[tex]\frac{C_{A} \times 21.80 }{0.0998 \times 25.0} = \frac{1}{1}[/tex]

Then,

[tex]C_{A} \times 21.80=0.0998 \times 25.0[/tex]

∴ [tex]C_{A}=\frac{0.0998 \times 25.0}{21.80}[/tex]

[tex]C_{A} =\frac{2.495}{21.80}[/tex]

[tex]C_{A} = 0.11445 \ mol/dm^{3}[/tex]

Hence, the concentration of the nitric acid solution is 0.11445 mol/dm³

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What happens in cellular respiration?
A. Glucose reacts with water in the stomach to produce
energy.
B. Glucose and oxygen react to form carbon dioxide, water,
and heat.
O C. Glucose is broken down to provide oxygen for all cells in
the body.
D. Glucose is formed from smaller hydrocarbons in the body.

Answers

Answer:

Option B

Explanation:

The reaction can be summarized as

6O2+C6H12O6——›6CO2+6H2O+Heat

Answer:

B

Explanation:

ASAP!!!!! Just answer the reasoning and the story is there if you need it (probably do though)

Answers

Ok so it’s A because if the bacteria got exposed to that same mold that killed the first colony then it will happen again

Convert into decimal number system​

Answers

Answer:

Explanation:

I am sorry but please give detailed question

Answer:

Step 1 − Divide the decimal number to be converted by the value of the new base.

Step 2 − Get the remainder from Step 1 as the rightmost digit (least significant digit) of new base number.

Step 3 − Divide the quotient of the previous divide by the new base.

Step 4 − Record the remainder from Step 3 as the next digit (to the left) of the new base number.

Repeat Steps 3 and 4, getting remainders from right to left, until the quotient becomes zero in Step 3.

Explanation:

How many moles of NaCl are in a 1 kg salt packet? Write the answer to one decimal place.

Answers

1Kg = 1000g

the molar mass of NaCl = 58.44 g/mol

number of moles = Mass / Molar mass

n = 1000g ÷ (58.44 g/mol)

n = 17.1115 mol

since you want the answer in one decimal place

then number of moles = 17.1 moles

. the density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (v). density

Answers

Density is intensive because it is the ratio of two extensive properties that is mass to volume.

What is Density ?

Density is defined as mass per unit volume. S.I unit if density is kg/m³.

It is expressed as

Density = [tex]\frac{\text{Mass}}{\text{Volume}}[/tex]  or [tex]d = \frac{m}{V}[/tex]

What is Intensive Property ?

Intensive property is the property which does not depend on the size of the system. Intensive property can be easily identified. Intensive property is the independent property. The size does not change in this.

Example of intensive property are Density, Freezing point, melting point, colour, Lustre, etc.  

What is Extensive property ?

Extensive property is the property which depend on the substance. Extensive property cannot be easily identified.

Example of extensive property length, weight, volume, mass etc.

Thus from the above conclusion we can say that Density is intensive because it is the ratio of two extensive properties that is mass to volume.

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Disclaimer: The given question is incomplete on the portal. Here is the complete question.

Question: The density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (v)

density = [tex]\frac{\text{Mass}}{\text{Volume}}[/tex]  or [tex]d = \frac{m}{V}[/tex]

Considering that mass and volume are both extensive properties, explain why their ratio, density is intensive.

A container of gas is initially at 0.25 atm and 0 ˚C. What will the pressure be at 125 ˚C?

Answers

Answer:

0.37atm

Explanation:

Given parameters:

Initial pressure  = 0.25atm

Initial temperature  = 0°C  = 273K

Final temperature  = 125°C  = 125 + 273  = 398K

Unknown:

Final pressure  = ?

Solution:

To solve this problem, we use a derivative of the combined gas law;

           [tex]\frac{P1}{T1}[/tex]  = [tex]\frac{P2}{T2}[/tex]

  P and T are pressure and temperature

  1 and 2 are initial and final values

        [tex]\frac{0.25}{273}[/tex]   = [tex]\frac{P2}{398}[/tex]  

         P2  = 0.37atm

Coral reef are threatened today mainly because

Answers

Answer: Pollution.

Explanation: Humans are polluting Earth's oceans with our toxic waste and plastic garbage. This trash kills the coral reefs that exist in said oceans.

Answer:

Really pollution because that includes a lot of things

Explanation:

Have a good day

A tub is filled to the brim with water.
If you were to completely submerge
your body in this tub, how much water
would overflow out of the tub?

Answers

At least a quarter of it or maybe even two thirds it depends on your body mass/weight

The volume of water that would overflowed out of the tub is directly related to the volume of the object submerged on it. Thus it depends on the mass and density of the object.

What is Archimedes principle?

The Greek mathematician and inventor Archimedes discovered the physical law of buoyancy, which states that any body completely or partially submerged in a fluid (gas or liquid) at rest is subject to an upward, or buoyant, force whose magnitude is equal to the weight of the fluid displaced by the body.

The volume of fluid that has been displaced is equal to the volume of an object that is completely submerged in the liquid or to the portion of the volume below the surface for an object that is only partially submerged.

The buoyant force's strength is equal to the weight of the fluid that has been dispersed. A body floating in a liquid or gas experiences an analogous buoyant force.

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What causes liquid water to freeze?

Answers

Answer:

Loss of energy to a colder material. Ice forms at 32°F /0° C.

Explanation:

As water cools, the natural movement between the molecules slows until it changes to a solid state (just as it boils to gas if they become too active). This movement doesn't completely stop until the material hits "absolute zero" at -460°F /-273° C. (0° Kelvin).

That's about the temperature "in the shade" in outer space.

A more interesting question would be, "why does water expand when it freezes?" The H - two - O molecule forms a triangle (with the O in the middle).

As it cools, the angle formed by the two H's gets larger. At around 36°F /2° C , the shrinking space between molecules gets overwhelmed by the expanding size of each molecule.

So, for those last few degrees before freezing, the overall volume gets bigger instead of continuing to decrease.

That's what causes potholes in roads (water settles into cracks, then makes the crack larger as it freezes). It's what damages the eaves trough around your roof, breaks leaves down into topsoil and splits boulders in half.

an unknown substance with a mass of 56.5 grams is placed in a graduated cylinder. what is the identity of the unknown substance? responses aluminum gold iron lead

Answers

56.5 grams of an unidentified material are put in a graduated cylinder. Lead is the name of the unknown material.

What is graduated cylinder?

In order to make them lighter and less fragile than glass, large graded cylinders are typically manufactured of polypropylene due to its good chemical resistance or poly methyl pentene due to its transparency. Polypropylene (PP) is simple to repeatedly autoclave; however, autoclaving beyond 121 °C (250 °F) will warp or break polypropylene graduated cylinders, reducing accuracy (depending on the chemical composition; normal commercial grade polypropylene melts above 177 °C (351 °F)).

In order to improve the precision and accuracy of volume measurement, traditional graduated cylinders are typically tall and narrow. It has a "spout" for simple pouring of the measured liquid and a glass or plastic base (stand, foot, support). Another variation is low and wide.

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Taking deep breaths can help trigger our
parasympathetic
system. The
parasympathetic nervous
system controls the regular functions like—————

Answers

Answer:

digestion

Explanation:

The parasympathetic nervous regulates life-sustaining processes, like digestion, during times when your body is relaxed.

How many moles are found in 6.63 x 10^23 ions of Ca ^+2

Answers

Answer:

a milllion moles

Explanation:

The boiling point of a pure substance is defined as the temperature at which

Answers

Explanation:

The boiling point of a pure substance is the temperature at which the substance transitions from a liquid to the gaseous phase. At this point, the vapor pressure of the liquid is equal to the applied pressure on the liquid.

which of the following instruments id used to describe how much matter is an object ​

Answers

Answer:

Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up.

Hope it help

The answer is triple beam balance.

Juan lays an object on a table in a well-lighted room. The object absorbs all visible light waves. What color object does Juan see?

A. white
B. black
C. violet
D. red

I need the answer for science asap

Answers

A. black bc it doesnt reflect any light back to the eye

Answer:

Black

Explanation:

White color reflects visible light while Black absorbs all light, and gives heat, so the answer is Black!

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