What do we call the study of matter and how matter changes?

Answers

Answer 1

Answer:

Explanation:

Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space.


Related Questions

Chemical properties can be observed without changing the substance

Answers

Answer:

chemical properties can only be measured only by changing a substance chemical identity

Explanation:

apex

In which phase transition do molecules move directly from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles?
evaporation
sublimation
freezing
deposition

Answers

Sublimation

would be your answer because it releases other cells out and causes the needy of cells to evaporate and sink.

sublimation is the phase transition do molecules move directly from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles.

What is Sublimation?

In the process of printing sublimation shirts, an image is first printed on a special sheet of paper before being transferred to a different material, typically polyester or a polyester blend. After that, heat is applied to the ink until it fuses with the fabric.

Sublimation shirt printing is more expensive than other procedures, but it produces shirts that stay longer and don't peel or crack over time.

he primary distinction between sublimation and heat transfer is that during sublimation, just the ink transfers to the substrate. A transfer layer is frequently also transferred to the material during the heat transfer procedure.

Therefore, sublimation is the phase transition do molecules move directly from a state involving vibration of particles in a fixed position to a state involving random movement of high-speed particles.

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Calculate the atomic mass of the unknown element X described below.
Please help

Answers

Answer:

286

Explanation:

Add atomic mass of all the Isotopes,

                                          Outcome = 825

divide it by number of isotopes which is 4 because there are 4 isotopes

                       Atomic mass of x = [tex]\frac{825}{4}[/tex]

                       Atomic mass of x is 286

The atomic mass of the unknown element X is 206 amu. Thus option B is correct.

What is atomic mass?

Atomic mass is defined as the relative mass of the element's atom in comparison to the mass of an atom of the C12 isotope.

In an example, the general atomic mass is the average of the atomic masses of a large number of different isotopes.

First we added atomic mass of each isotopes

= 204 + 206 + 207 + 208 = 824

Now to calculate the atomic mass of element X we divide it by 4 as there is four isotopes

So, atomic mass = 824 / 4

                           = 206 amu

Thus, the atomic mass of the unknown element X is 206 amu. Thus option B is correct.

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Which of the following representations shows the correct placement of trophic levels?
Secondary Consumers
Primary Consumers
Producers

Answers

You have to start listing from the bottom :

3. Secondary Consumers

2. Primary Consumers

1. Producer

Answer the following questions in the space provided.
1. Classify each of the following as a homogeneous or heterogeneous substance.
a. iron ore
b. quartz
c. granite
d. energy drink
e. oil-and-vinegar salad dressing
f. salt
g. rainwater
h. nitrogen
2. Classify each of the following as a physical or chemical change.
a. ice melting
b. paper burning
c. metal rusting
d. gas pressure increasing
e. liquid evaporating
f. food digesting
3. Compare a physical change with a chemical change.

Answers

Answer: iron ore is heter

quartz homo

granite heter

energy drink homo

oil-and vingar salad dressing heter

salt homo

rainwater homo

nitrogen homo

ice melting chemical

burning paper chemical change

how many moles of methane are there in a 10g sample?​

Answers

 1 grams Methane is equal to 0.062334579609362 mole. Note that rounding errors may occur, so always check the results. 

Electron spin around the nucleus in specific paths called?

Answers

Answer:

Electron cloud

Explanation:

why does adding salt to ice make it melt faster

Answers

Hi :)

The salt will dissolve the ice, hence making it melt faster which lowers its freezing point below the temperature of the ice

Ice in contact with salty water therefore melts

Hope this helps :)

g If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure

Answers

The question is incomplete; the complete question is;

If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure?

A) Octane

B) Ethane

C) Butane

D) All the gases will condense at the same pressure

Answer:

Octane

Explanation:

If we study the table closely we will realize that octane has the greatest molecular mass among all the gases shown.

The greater the molecular mass, the lower the pressure required for the condensation of the gas. Hence, the lowest pressure is required for the condensation of octane at constant temperature.

What is the first step when using a microscope?


A. Place the microscope slide on the stage

B. Plug the microscope in and turn it on

C. Switch to the low power objective lens

D. Secure the slide to the stage clips

Answers

Answer:

I think the answer is B :)

Answer:

the first step is B

Explanation: I'm on this lesson

Question 20 of 66
Which of the following species has the same number of protons as Fe3+?
A) Mn3+
B) Co2+
C) Fe2+
D) Nit
E) CO3+

Answers

Okay, so you know that the number of protons never changes for a certain element. It defines what the element is, so as the element in the question is iron (fe) we know that the answer must also be iron. Therefore the answer is C. The 2+ and 3+ do not matter as these show that there are different numbers of electrons.
If you have any questions please let me know.

Fe²⁺ has the same number of protons as Fe³⁺.

In order to know the number of protons of a species, we need to look for the atomic number (Z) in the Periodic Table.

The atomic number of Fe is 26, so it has 26 protons. Since protons are in the nucleus, they are not lost nor gained. Fe³⁺ results from Fe losing 3 electrons, but it has 26 protons as well.

Taking this into account, let's consider the number of protons of the following species:

A) Mn³⁺. It has 25 protons like Mn (Z = 25).

B) Co²⁺. It has 27 protons like Co (Z = 27).

C) Fe²⁺. It has 26 protons like Fe (Z = 26).

D) Ni. It has 28 protons (Z = 28).

E) Co³⁺. It has 27 protons like Co (Z = 27).

Fe²⁺ has the same number of protons as Fe³⁺.

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Which element has more metallic properties?
Lead or Germanium

Answers

lead has more metallic properties

What is conduction?

Transfer of heat through circular movement
Transfer of heat through direct physical contact
Transfer of heat through electromagnetic waves
Transfer of heat through the movement of part

Answers

Answer:

Transfer of heat through direct physical contact

Explanation:

The meaning of conduction is the transfer of heat directly transmitted through a substance when there is the difference between temperature and electrical potential. Hope it helps!

Answer:

B

Explanation:

Which of the following is the metric system based on?

Answers

Where is the “following” can you show us the answer choices
The metric system is a decimal-based system of measurement originally based on the meter and kilogram, which were introduced by France in 1799. "Decimal-based" means all the units are based on powers of 10.

which type of matter is represented by the particle diagram

Answers

Answer:

a compound

Explanation:

A compound




Explanation: I’m BIGGER BRAIN THAN THEM ALL!

II. Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.86 g of magnesium ribbon burns with 155ml of oxygen at 1.0 atm and 275 K , a bright, white light and a white, powdery product is formed, magnesium oxide. How many grams of excess reactant remain?

Answers

Answer:

[tex]Excess=3.53g[/tex]

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

[tex]2Mg(s)+O_2(g) \rightarrow 2MgO(s)[/tex]

Next, we identify the limiting reactant by computing the moles of magnesium oxide yielded by 3.86 g of magnesium and 155 mL of oxygen at the given conditions via their 2:1:2 mole ratios and the ideal gas equation:

[tex]n_{MnO}^{by \ Mg}=3.86gMg*\frac{1molMg}{24.3gMg}*\frac{2molMgO}{2molMg} =0.159molMgO\\\\n_{MnO}^{by \ O_2}=\frac{1atm*0.155L}{0.082\frac{atm*L}{molO_2*K}*275K} *\frac{2mol MgO}{1molO_2} =0.0137molMgO[/tex]

It means that the limiting reactant is the oxygen as it yields the smallest amount of magnesium oxide. Next, we compute the mass of magnesium consumed the oxygen only:

[tex]m_{Mg}^{consumed}=0.0137molMgO*\frac{2molMg}{2molMgO} *\frac{24.3gMg}{1molMg} =0.334gMg[/tex]

Thus, the mass in excess is:

[tex]Excess=3.86g-0.334g\\\\Excess=3.53g[/tex]

Regards!

A type of substance containing atoms of two or more different elements that are chemically bonded together is referred to as a

Answers

Answer:

Compound

Explanation:

What of the following is made out of atoms? (HINT: vocabulary word "atom" or "matter") * 1 Air
2 Light
3 Energy
4 Sound

Answers

the correct answer would be air

The combination of two or more atoms, from the same or different elements, creates a(n).
a. element
c. molecule
b. atom
d. mixture
Please select the best answer from the choices provided
Pls help!!!! Fast!!!
B
С
D

Answers

It’s makes a molecule

Answer:

c Molecule

Explanation:

cuz science

Kinetic and potential energy are two types of energy that relate too

Answers

Answer:

Option B. A tractor–trailer traveling at 80 kph.

Explanation:

Kinetic energy can be defined as the energy possessed by a body in motion. Mathematically, it is expressed as:

K.E = ½mv²

Where:

K.E is the kinetic energy.

m is the mass of the object.

v is the velocity of the object.

From the equation, K.E = ½mv²,

We can say that the kinetic energy (K.E), is directly proportional to both the mass (m) and square of the velocity (v). This implies that the greater the mass of an object, the greater the kinetic energy and the smaller the mass, the smaller the kinetic energy.

Now, considering the options given in question above, it is evident that the tractor–trailer has a greater mass than the car, cheetah and motor cycle. Hence, the tractor–trailer will have a greater kinetic energy even though they are traveling with the same velocity.

For the combustion of methane, CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) △H = -213
kcal/mol

How many kilocalories of energy are released from 5.0 mol of methane?
How many moles of methane are needed to give 100. kcal heat?

Answers

Answer:

1.-213(kcal/mol)*5mol=1065kcal

2.100/213 mol

a. The energy released from 5.0 mol of methane is -1065 kcal/mol.

b. The number of moles of methane needed to give 100. kcal heat is 0.4694 moles.

What is combustion?

Combustion is a chemical process in which the element reacts with oxygen to produce heat and light. Burning of wood.

The equation of combustion of methane:

CH₄ (g) + 2O₂(g) ------> CO₂ (g) + 2H₂O (l)

a) Enthalpy of the reaction is H = -213 Kcal/mol

This means 213 Kcal heat is released in the burning of one mole of CH4

H reaction = [ H products ] - [ H reactants ]

Hr = [ H(CO₂)g + 2H(H₂O)l ] - [ H(CH₄)g ] = -213 kcal/mol

For 5 moles of methane:

5CH₄(g) + 10O₂(g) -----> 5CO₂(g) + 10H₂O(l)

therefore, new Hr = 5 x -213 = -1065 kcal/mol

H reaction = -1065 kcal/mol

b) 213 kcal is released per mole of Methane

then, to release 100 kcal we need, 100 / (213) = 0.4694 moles

Thus, the energy released is -1065 kcal/mol, and the number of moles is 0.4694 moles.

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is a granite a mineral or a rock

Answers

mineral because its not a rock

Answer:

Rock

Step-by-step explanation:

It's an igneous rock

I hope this helps!

Which carboxylic acid can be combined with an alcohol to form the ester shown below?

Answers

Answer:

CH₃CH₂CH₂COOH.

Explanation:

To know which option is correct, let us hydrolysed the given ester. This is illustrated in the attached photo.

Hydrolysis of ester involves breaking the ester bond by a water molecule to produce the corresponding alcohol and carboxylic acid.

From the reaction given in the attached photo, we can see that the carboxylic acid needed to produce the desired ester is butanoic acid, CH₃CH₂CH₂COOH.

What is the mass number of Carbon–12, which has 6 protons and 6 neutrons?

Answers

Answer:

It has the atomic mass of 12.

I will mark brainliest as soon as there are two answers! Please be quick, I'm timed

A mineral forms in water heated by magma inside Earth.

Which statement best describes this mineral?

The mineral formed through evaporation.
The mineral crystallized from molten material.
The mineral formed when a hot water solution cooled.
The mineral likely has all the same properties as the surrounding rock.

Answers

Answer: i would do the mineral formed when a hot water solution cooled because you said that a mineral forms in water heated by magma inside Earth.

Explanation:

The answer would be C

Explanation:

When magma cools down it will change into a rock type so the answer would be C.

Help pls:)?
If the low power objective has 10X printed on it, what would be the total magnification when looking through the microscope?

Answers

Answer:

The magnification of the microscope is equal to the magnification of the ocular lens times the magnification of the objective lens. Since the objective lens has 10x printed on them at "low power". The total magnification would be 10 times 10.

Explanation:

i hope this helps C:

I need help with these 2 problems ASAP please.
This is not chemistry but i could not find science
(THIS QUESTION IS FOR SCIENCE)

Answers

i think the answer for the first question is sickle-cell anemia and second question is phenylketonuria (PKU)

Answer:

1. is sickle-cell anemia and 2. is phenyketonuria

Explanation:

Why is it important o differentiate between human and animal blood from a crime scene? A) To determine whether an animal might have been injured. B) In order to accurately identify the source of any blood. In order to thoroughly and accurately recreate the crime scene. D To determine the possible source of any trace evidence such as hair or bite marks​

Answers

Answer:

B) In order to accurately identify the source of any blood. In order to thoroughly and accurately recreate the crime scene.

How many electrons does 2Na+1 have

Answers

Answer:

So... for the element of SODIUM, you already know that the atomic number tells you the number of electrons. That means there are 11 electrons in a sodium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and only one in shell three.

Explanation:

brainliest pleaseeee <3

Answer:

so there would be 2 electrons because

Explanation:

sodium has 11 electrons but if you look at the shels it onl has one electron (from the image im looking at) and the other shell only have one so theres 2 electrons

The lowest energy state of an atom is its

A. Highest-occupied energy level.
B. Principle quantum number.
C. Electron configuration.
D. Ground state.

Answers

Answer:

Principle quantum number.

Explanation:

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