I need help solving all of these problems help plsss! helpppp

it provides carbon dioxide and rhen it goes through the car and gives the gas oxygen

Answer:

Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.

Explanation:

Answer:

mass of reactants mass of products

Answer:

C. mass of reactants = mass of products

Explanation:

I just took the test. Hope this helps and good luck!

Answer:

Periodic table

Explanation:

Answer:

The new pressure of the gas is 395.5mmHg

Explanation:

The pressure of a gas is inversely proportional to its concentration (Boyle's law). The equation that explain this law is:

P₁V₁ = P₂V₂

Where P is pressure

And V is volume of 1, initial state and 2, final state of the gas

Initial state:

791mmHg; 0.500L.

Final state:

1.00L

Replacing:

791mmHg* 0.500L = P₂*1.00L

P₂ = 395.5mmHg

Answer:

Soapy detergents clean more effectively than normal soap. Hard water (water with high mineral content). Hard water can be used with soapy detergents but soap cannot be used with hard water. When soapy detergent and hard water are combined it makes a protective film that is really resistant to rinsing.

Have a good day.

Answer: They combined to form molecules.

Explanation:

That statement that describes atoms in Group 18(8A) are inert is "they have a full valence shell."

A substance that is not chemically reactive is referred to as chemically inert.

When elements react, their atoms lose, gain, or share electrons to complete their outer shells. Noble gas atoms already have entire outer shells, therefore they don't inclined to lose, gain, or share electrons. This is why noble gases are chemically inert and do not participate in reactions.

When atoms bond, they try to form an octet by transferring or sharing valence electrons in the case of ionic bonds and covalent bonds, respectively. There is no incentive for group 18 atoms to bond because they already have an octet of valence electrons.

As a result, the noble gases belong to the periodic table's group 18. They are nonmetal elements with a full shell of valence electrons that are chemically inert, colourless, and odourless. We can see that helium (atomic number 2) has a full shell of two s electrons if we look at the electron configurations.

Hence the correct option is D.

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Answer:

2.8 mg ≈ 0.12 mol

Answer:

Tin (IV) Nitrate

General Formulas and Concepts:

Chem

Explanation:

Sn has 2 general forms in charges: Sn²⁺ and Sn⁴⁺ as it is a Post-Transition metal.

Nitrate, NO₃⁻, has a 1 minus charge.

To balance out these charges from the given compound, we know that there are going to be 4 nitrates to balance out a charge. +4 and -4 equals 0, so the charge of Sn would be +4.

Therefore, our compound name would be Metal (Oxidation Number) polyatomic ion:

Tin (IV) Nitrate

Answer:

The electron cloud keeps the surronds the atom like abubble and the orbit is what the  electrons go around

Explanation:

Answer:

The number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge. The atomic number tells you the number of protons in one atom of an element. It also tells you the number of electrons in a neutral atom of that element.

Explanation:

Answer:

The number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge. The atomic number tells you the number of protons in one atom of an element. It also tells you the number of electrons in a neutral atom of that element.

Explanation:

Answer:

Explanation: i think it is C if i'am wrong i'am sorry

Answer:

hope you like

Explanation:

the solubility rate of a solid is directly proportional to the temperature. if the temperature is high the solubility will also increase

Answer:

Explanation:

volume of spherical ball = 4/3 x π R³

= 4 x 3.14 x .5³ / 3

= .5233 cm³ or ml.

mass = 2 g

density = mass / volume

= 2 / .5233

= 3.8 g / ml .

So its density is more than that of water , hence it will sink into water .

Answer:

4. all the above

Explanation:

It's all of the above because Thermal energy has all three. An example is like a pot of water on the stove boiling.  Radiation is coming off of the eye of the stove. Conduction occurs when heat transfers from hot to cold ( like the handle of the pot). Convection occurs in the boiling of the water by rotating causing the heat to rise.

Answer:

0.05

Explanation:

We find the rate of the chess

Sarah is 2.5/10

Arun is 1.6/8

We will get

0.25 for Sarah

0.20 for Arun

We subtract the two

0.25 - 0.20, we then get 0.05

Sarah has 0.05 more cheese in one serving than Arun

Answer:

Barium and chlorine

Explanation:

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Answer:

Sucrose is made up of one glucose and one fructose molecule, and are joined together by a glycosidic bond

Explanation:

Answer:

option B is correct

Explanation:

The properties of the elements can be determined from their electron configuration

outer electron : 2 (3s²)

lose(2 electron)

charge : +2

cation (positive)

symbol : Mg²⁺

outer electron : 7 (4s²4p⁵)

gain ( 1 electron)

charge : -1

anion (negative)

symbol : Br⁻

Helium⇒electron configuration : 1s²

outer electron : 2 (1s²)

stabil(no gain/no lose)

charge : 0

neutral

symbol : He

outer electron : 5 ( 2s²2p³)

gain(3 electron)

charge : -3

anion

symbol : N³⁻

Answer:

Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

The frequency : a) 7.5 x 10¹⁴ /s

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves  (/s or Hz)

f = c / λ

c = speed of light

= 3.10⁸  m/s

λ = wavelength

The wavelength(λ) of purple light is 400 x 10⁻⁹ m, so the frequency :

[tex]\tt f=\dfrac{c}{\lambda}\\\\f=\dfrac{3.10^8~m/s}{4.10^{-7}m}\\\\f=\boxed{\bold{7.5.10^{14}}/s}[/tex]

Answer:

Balancing an equation

Explanation:

These steps describes the processes which are involved in balancing a chemical equation.

In balancing the a chemical equation, the law of conservation of mass is strictly adhered to. It suggests that in a chemical reaction, atoms are neither created nor destroyed, but they combine with one another.

Answer:

balancing

Explanation:

Answer:

Chemical equation: AgNo3 + LiBr = AgBr + LiNO3

Explanation:

Answer:

Chemical equation: AgNO3 + LiBr -> AgBr + LiNO3

Complete Ionic equation: Ag + NO3 + Li + Br -> AgBr + Li + NO3

Net Ionic equation: Ag + Br -> AgBr

Explanation:

You start out with the chemical equation. We know that to get to the complete ionic equation we have to follow the solubility guidelines for common ionic compounds. In there, we can see that NO3 is soluble with no exceptions, which means every NO3 in this equation should be separated from the compound (this brings us to Ag + NO3 + LiBr -> AgBr + Li + NO3). Next we should separate Br, but be careufl because in the solubility guidelines it states that an exception to this being soluble would be if Br was next to Ag, Hg, and Pb. Since our second Br is next to an Ag, our equation will look like Ag + NO3 + Li + Br -> AgBr + Li + NO3. To find the net ionic equation all we're going to need to find are the substances that cancel each other out on both sides of the equation (aka the spectator ions). Our spectator ions in this case are Li and NO3. After we cancel those out, our net ionic equation is Ag + Br -> AgBr.

Answer:

No, it is not

Explanation:

The reason for this answer is below

To conduct an experiment/investigation that involves the use of specific amounts of carbon dioxide and water by plants, one needs a controlled environment where the amount of carbon dioxide and water made available to the plant can be monitored and regulated as desired by the experimental design. The neighbor's backyard cannot provide this controlled environment and thus it is a bad idea.

Note that the neighbor's backyard cannot provide the controlled environment because the amount of carbon dioxide the plants will be exposed to there cannot be regulated as this is the carbon dioxide from the atmosphere and also the plants could get additional water from midnight dew which cannot be regulated also.

It is a good idea to use backyard garden to conduct an investigation of

how tomato plants use specific amounts of carbon dioxide and water to

grow at a certain rate.

To obtain an accurate result, experiments should be done in an

environment  which is similar to those in which plants are exposed to during

photosynthetic reactions.

The use of the backyard garden will have different factors such as

atmospheric pressure, sunlight, precipitation which the plants are exposed to

in its normal environment which is why it is a good idea.

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Answer:

Fnet = 13920 Newtons

Explanation:

Net force can be defined as the vector sum of all the forces acting on a body or an object i.e the sum of all forces acting simultaneously on a body or an object.

Mathematically, net force is given by the formula;

[tex] Fnet = Fapp + Fg[/tex]

Where;

Given the following data;

Mass, m = 800 kg

Acceleration, a = 7.6m/s²

To find the applied force;

[tex] Fapp = ma[/tex]

Substituting into the equation, we have;

[tex] Fapp = 800 * 7.6[/tex]

Fapp = 6080N

To find the gravitational force;

We know that acceleration due to gravity, g = 9.8m/s²

[tex] Fg = mg[/tex]

Substituting into the equation;

[tex] Fg = 800 * 9.8[/tex]

Fg = 7840N

To find the net force;

[tex] Fnet = Fapp + Fg[/tex]

Substituting into the equation, we have;

[tex] Fnet = 6080N + 7840N[/tex]

Fnet = 13920 Newton.

Therefore, the net force experienced is 13920 Newton.

Answer:

9.03 x 10²³atoms

Explanation:

Given parameters:

Number of moles of CO₂  = 1.5mol

Unknown:

Number of atoms  = ?

Solution:

In a mole of a substance, we have the Avogadro's number of particles which is 6.02 x 10²³atoms.

  Using this number, we can determine the amount of atoms in any substance.

If;

       1 mole of CO₂ contains 6.02 x 10²³ atoms;

     1.5mole of CO₂ will contain 1.5 x 6.02 x 10²³ atoms

                                                = 9.03 x 10²³atoms

Answer:

More than soap sc um, hard-to-remove scale or film is often due to hard water. Also, take a good look at your faucets or fixtures.

Explanation:

hope this helps :D

Answer:

I believe 11 is B 12 is C 13 is B and 14 is C