Each element is defined by its number of its

Answer:They change

Explanation:

Be more specific the next time you ask a question :)

Answer:

matter can be classified as a substance or a element

Explanation:

The chemical reaction that describes the combustion of methane is

[tex]\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}[/tex]

We need to convert the mass of methane to moles:

[tex]0.00880\:\text{g} × \dfrac{1\:\text{mol CH}_4}{16.04\:\text{g}}[/tex]

[tex]= 5.49×10^{-4}\:\text{mol CH}_4[/tex]

Now use the molar ratios to determine the amount of oxygen used during the combustion:

[tex]5.49×10^{-4}\:\text{mol CH}_4×\left(\dfrac{2\:\text{mol O}_2}{1\:\text{mol CH}_4}\right)[/tex]

[tex] = 0.00110\:\text{mol O}_2[/tex]

Converting this to grams, we find that the mass of oxygen is

[tex]0.00110\:\text{mol O}_2×\left(\dfrac{15.999\:\text{g O}_2}{1\:\text{mol O}_2}\right)[/tex]

[tex] = 0.0176\:\text{g O}_2[/tex]

Answer:

8.3g

Explanation:

d=m/v

m=d*v

m=0.893*9.29

m=8.3g

If the density of carbon tetrachloride is 0.893 g/mL. The mass of the compound will be 8.3 g.

Mass is the quantity of matter. The mass can be calculated by multiplying density with the volume. The evaluation of how close something is packed. As the mass per unit volume, it has that definition.

Volume is the space occupied by the object. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts. A substance that is less dense than water will float if it is gently introduced to the water's surface.

So the formula will be d = m / v

m = d x v

The density of carbon tetrachloride is 0.893 g/m

The volume of carbon tetrachloride is 9.29 mL

What the mass is?

Putting the value in the formula

m = 0.893  x 9.29 = 8.3g

Thus, the mass of the compound will be 8.3 g.

To learn more about mass, refer to the link:

https://brainly.com/question/14329156

#SPJ2

Answer:

They are tube like structures that absorb nutrients or water from digested food into the bloodstream.

Hi i'm butt your

hahahahahahahahahahahahaha

Answer:

2,751 Meters.

Explanation:

0.86 + 22.4 + 4.25 = 27.51 km.

Convert that to meters which gives you 2,751 meters.

Answer:

he model of the atom changed and what additional evidence would require the model to change again.​

because ;

Explanation:

This atomic model has changed over time. Scientists used the model to make predictions. Sometimes the results of their experiments were a surprise and they did not fit with the existing model. Scientists changed the model so that it could explain the new evidence.

Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus. In one moment they are present on one side of the nucleus and at very next moment they will be on the other side due to their continuous rotation.

Answer:

3

Explanation:

i took the quiz

Answer:

Atom 3

Explanation:

The given data is as follows:

Atom number   Protons   Neutrons   Electrons

1                          9               8                9

2                         9               9                8

3                         9               9                10

4                         9               10               9

The charge on an atom is given by the relation:

Charge = number of protons - number of electrons

For atom 1: charge = 9 - 9 = 0

Atom 2 : charge = 9-8 = 1

Atom 3: charge = 9 -10 = -1

Atom 4 : charge = 9-9 = 0

Answer:

An orbit is a fixed path on which electrons revolve around the nucleus.

An orbital is the probable area of finding the maximum density of electrons in an atom. ..

Planck's constant =

6.62607004 × 10-34 m2 kg / s

Explanation:

Step by Step explanation

The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. Wikipedia

Answer:

The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency.

Plancks constant =

6.62607004 × 10-34 m2 kg / s

Answer:

chemical potential enery

Mark brainliest

Explanation:

mass of Fluorine = 10proton + 10 neutron

mass = 20

mark me as brainliest ❤️

Answer:

highly corrosive but not highly flammable

Explanation:

When a chemical has a high, or even a 1, in the health rating, it usually means that the chemical is corrosive or can damage a human in another way.

Answer:   highly corrosive but not highly flammable

Explanation:  When a chemical has a high, or even a 1, in the health rating, it usually means that the chemical is corrosive or can damage a human in another way.

Answer:3.935g/cm3

Explanation:39.35 g. /10cm3 = 3.935g/cm3

10 cm³ of metallic cylinder has a mass of 39.35 g. The density of this cylinder is 3.935 g/cm³.

Density is a measure of the amount of mass per unit volume of a substance. It is an intensive physical property, meaning that its value does not change depending on the size of the object.

Density is calculated by dividing an object’s mass by its volume.

The density of water is 1,000 kg/m³ at 4°C. The unit of density is kg/m³ (kilogram per cubic meter). The SI unit of density is kg/m³

Density = mass/volume

            = 39.35 g/10 cm³

            =3.935 g/cm³.

To know more about density here

https://brainly.com/question/29775886

#SPJ2

Answer:

Density=Mass/Volume

7.265=M/5.5

Mass=7.265×5.5g

=39.9575g

Answer: Coefficients

Explanation: The coefficients in a balanced chemical equation tell you how many moles of reactants you'll require and how many moles of product you'll be able to make.

Answer: The coefficient in front of the molecule tells it’s relative number of moles.

Explanation: Quiz

 Answer:    67%

Explanation:  The weighted averages of the two isotopes must add to 131.01.  Let Y be the percentage of isotope 129.  Then (1-Y) will be the percentage of isotope 132.  The weighted average of each is:

129:   129Y

132:    132(1-Y)

Their sum is equal to 131.01

129Y + 132(1-Y) = 131.01

Y = 0.33, or 33%

(1-Y) = 0.67, or 67%

Check:  129*(0.33) = 42.57

             132*(0.67) = 88.44

                     Sum =   131.01  It checks OK  The 132 isotopes is 67% of the sample.

Considering the definition of atomic mass, isotopes and atomic mass of an element, the percent abundance of ¹³²X is 67%.

First of all, the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.

The same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.

On the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes. In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.

In this case, you know:

Then, the average mass of X can be calculated as:

132 amu×y + 129 amu×( 1-y)= 131.01 amu

Solving, you can find the percent abundance of ¹³²X:

132 amu×y + 129 amu×1 - 129 amu×y= 131.01 amu

132 amu×y + 129 amu - 129 amu×y= 131.01 amu

132 amu×y - 129 amu×y= 131.01 amu - 129 amu

3 amu×y= 2.01 amu

y= 2.01 amu÷ 3 amu

y= 0.67= 67%

Finally, the percent abundance of ¹³²X is 67%.

Learn more about average atomic mass:

brainly.com/question/4923781?referrer=searchResults

brainly.com/question/1826476?referrer=searchResults

brainly.com/question/15230683?referrer=searchResults

brainly.com/question/7955048?referrer=searchResults

The main duties of a laboratory shop are to offer a secure setting for the distribution and storage of materials, tools, and supplies used in laboratories.

Any laboratory or research facility must have this to run efficiently. A laboratory store's primary duty is to safely and securely store materials, equipment, and supplies used in laboratories.

Making sure the objects are stored in a way that keeps them from becoming harmed or contaminated is part of this. This also entails making certain that the goods are arranged such that they may be quickly found and retrieved when required.

In addition, the laboratory store should have a system in place to track the inventory and ensure that the items are always in stock. A laboratory store's second purpose is to act as a distribution system for materials, tools, and supplies used in labs.

This involves making sure the supplies are sent to the right people in a timely way and that they are kept in the suitable places for storage. Additionally, the staff should be able to receive support and guidance from the laboratory shop on how to use and care for the equipment.

The storage and distribution of laboratory supplies, tools, and materials takes place in a safe atmosphere, which is the laboratory store's third purpose. This involves making sure the assets are kept in a secure place and that only authorised people are allowed access to them.

Learn more about  laboratory  at:

https://brainly.com/question/30753305

#SPJ2

Answer:

I think its B because yeah lol but I hope you get it right

The following can be best described as a gaseous compound. The correct option is C.

A state of matter is one of the various forms that matter can take in physics. In everyday life, four states of matter are visible: solid, liquid, gas, and plasma.

The elements those are gases basically at standard temperature as well as pressure are referred to as gaseous elements. The periodic table contains 11 gaseous elements.

A gas is a sample of matter that conforms to the shape of the container in which it is held and acquires a uniform density inside the container, even when gravity is present and regardless of the amount of substance in the container.

The given image depicts that the molecules of particles are at some distance from each other, this usually implies for gaseous compound.

Thus, the correct option is C.

For more details regarding states of matter, visit:

https://brainly.com/question/9402776

#SPJ2

Answer:

should be D

Explanation:

Answer:

7.22 feet long

Explanation:

1 meter = 3.28084 feet

2.2 × 3.28084 = 7.21785

= 7.22

I hope this is helpful :)

Answer

the answer is it will bubble and foam.

Explanation:

when mixed with vinegar, baking soda will foam almost like a shaken carbonated drink.

Hope that helps!!!

Answer:

RbCIO2 rubidium chlorite magnesium hypocarbonite.

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, RbCIO[tex]_2[/tex] is named as rubidium chlorite magnesium hypo carbonite.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water. The name of the given compound is rubidium chlorite magnesium hypo carbonite.

Therefore, RbCIO[tex]_2[/tex] is named as rubidium chlorite magnesium hypo carbonite.

To learn more about chemical compound, here:

brainly.com/question/26487468

#SPJ2

The type of decay a radioisotope will undergo is determined by: the neutron to proton ratio.

An atom can be defined as the smallest unit which comprises the matter that forms all chemical elements. Thus, atoms are typically the fundamental building blocks of matter and as such determines (defines) the structure of a chemical element.

Generally, atoms are typically made up of three (3) distinct particles and these are;  

Isotopes can be defined as the atom of a chemical element that has the same number of protons but different number of neutrons.

This ultimately implies that, the isotopes of a chemical element have the same atomic number (number of protons) but different atomic mass (number of nucleons).

On a related note, this two distinct particles (protons and neutrons) found in the atom of a chemical element determines the type of decay or disintegration a radioisotope will undergo.

In conclusion, the type of decay a radioisotope will undergo is determined by the neutron to proton ratio.

Find more information: https://brainly.com/question/23392119

Answer: the proton : neutron ratio

Explanation:

stability

Answer: Sound

Explanation:

Answer: read your book

Explanation: if you read it should be in there

Answer:

A= 15 atoms B= 3

Explanation:

5 x 2 + 5 x 1

3 + 2 x 1