Will give brainliest if solved.

Answer:

they determine what element it is, and what charge it will be.

Explanation:

the amount of neutrons determines the mass of the atom

the amount of protons determines the element of the atom

the amount of electrons determines the charge of the atom

Answer:

0.5M is the answer.

Explanation:

1M solution is the solution containing 1mole solute dissolved per litre of solution.

Using unitary method,

1000cc gives 1M.

1cc gives 1/1000M.

500 cc gives 500/1000M=0.5M

In the voltaic cell :

at the cathode ⇒reduction reaction

at the anode ⇒ oxidation reaction

We can see which metal is more reactive between Ag and Mg with voltaic series

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au

From the series , Mg more reactive than Ag, so that Mg undergoes an oxidation reaction and Ag reduction reaction

Half-reactions

cathode : Ag⁺ (aq) + e⁻ ⇒ Ag (s)  

anode : Mg (s) → Mg²⁺ (aq) + 2e−

So the answer for :

15. A. Ag⁺ (aq) + e⁻ ⇒ Ag (s)  (Reduction reaction)

16. C. Mg (s) → Mg²⁺ (aq) + 2e−  (Oxidation reaction)

17. A. the anode (oxidation reaction)

Answer: 5 atoms

Explanation:

Answer:

red

Explanation:

Answer:

B Sonar

Explanation:

The theory of continental drift was widely unaccepted until scientists started using  SONAR (Sound Navigation Ranging) the map the ocean floor. Therefore, option (B) is correct.

Sonar has full-form sound navigation and ranging which is a technique that uses sound propagation usually underwater to navigate, measure distances, and communicate with or detect objects.

Sonar can be used as a measurement of the echo characteristics of "targets" in the water. Sonar is used for robot navigation, while SODAR is used for atmospheric investigations.

The frequencies used in sonar systems vary from very low (infrasonic) frequency to extremely high frequency (ultrasonic). Ultrasonic waves are used in SONAR because they travel deep into the water without losing their power and their frequency ranges from 20Hz to 20,000Hz.

SONAR showed the mid of the Atlantic ridge is dividing plates such as the north Atlantic from the European plate which provides evidence of continental drift.

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Answer: 1,334 j

Explanation:

The gravitational potential energy gained by the ball of mass 8.5 kg thrown 16 m upwards is 1334.16 J

From the question given above, the following data were obtained:

Mass (m) = 8.5 Kg

Acceleration due to gravity (g) = 9.81 ms¯²

Height (h) = 16 m

The gravitational potential energy gained by the ball can be obtained as follow:

PE = mgh

PE = 8.5 × 9.81 × 16

Therefore, the gravitational potential energy gained by the ball is 1334.16 J

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Answer:

The amount of mass in a certain volume

Explanation:

Answer:

Density is mass divided by volume. Density is the determination of something floating or sinking.

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1.distance

Explanation:

I hope it will help you

please mark me has brainlist

Answer:

change of state only

Answer:

The Eukaryotic cell that the organelle shows below belongs to the Nucleus.

Explanation:

In fact, the mere presence of a nucleus is considered one of the defining features of a Eukaryota cell.

Answer:

Just look up specific heat capacity of a certain element and it should give you the specific heat in the form of energy/mass×temperature i.e J/kg°C (joules per kilogram, and degrees celsius).

Answer:

2. Most people would get a germ protector. I would just get a water filter.

Explanation:

Answer is A

At the bottom of the periodic table is a special group of metallic radioactive elements called actinides or actinoids. These elements, usually considered ranging from atomic number 89 to atomic number 103 on the periodic table, have interesting properties, and play a key role in nuclear chemistry.

The correct option is D. Group 14 are metalloids and they contain both metals and non metals.

The lowest class of elements, known as the metaloids, only has six members: the elements boron, silicon, germanium, arsenic, antimony, and tellurium (Te). Metalloids have both nonmetal and metal qualities, including the ability to conduct electricity (elements that cannot conduct electricity).

The majority of metalloids, for instance, may conduct electricity, though not as well as metals. Metalloids frequently have a metallic sheen but a nonmetal brittleness.

Depending on the quantity of valence electrons they contain, metalloids can behave chemically like metals or nonmetals.

Therefore, The correct option is D. Group 14 are metalloids and they contain both metals and non metals.

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Answer:

option 4 - it can have different compositions, and it has a set of characteristics that change.

Mixture is defined to have different compositions, and it has a set of characteristics that does change.There are 2 types of mixtures:1) homogenous mixtures 2)heterogenous mixtures

Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.

As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.

Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.

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Answer:Silicon

Explanation:

Silicon - Element information, properties and uses | Periodic Table.

Royal Society of Chemistry › 14 › si...

Silicon - Element information, properties and uses | Periodic Table

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Answer:

A. Metals

Explanation:

Answer:

0.010285949393128987

Explanation:

I just used a conversion calculator

The concept of moles is a fundamental unit of measurement in chemistry that helps quantify the amount of a substance. There are approximately 10.28 moles of magnesium in 0.250 kg of Mg.

The mole (mol) is a unit used to express the number of entities, such as atoms, molecules, or ions, in a sample of a substance. One mole is defined as the amount of a substance that contains as many entities as there are atoms in exactly 12 grams of carbon-12.

The number of entities in one mole is known as Avogadro's number, which is approximately 6.022 x 10²³. This means that one mole of any substance contains approximately 6.022 x 10²³ entities.

To calculate the number of moles of magnesium (Mg) in 0.250 kg of Mg, we need to use the molar mass of magnesium and the given mass.

The molar mass of magnesium (Mg) is approximately 24.31 grams per mole (g/mol).

First, we need to convert the given mass from kilograms (kg) to grams (g):

[tex]0.250 kg * 1000 g/kg = 250 g[/tex]

Now we can use the molar mass to calculate the number of moles:

Number of moles = Mass (g) / Molar mass (g/mol)

[tex]=0.250 kg * 1000 g/kg = 250 g[/tex]

Therefore, there are approximately 10.28 moles of magnesium in 0.250 kg of Mg.

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Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question.  In a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition

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thermal energy leads to an increase in the kinetic energy also increasing in temperature hope this helped!

Answer:

thermal energy leads to an increase in the kinetic energy also increasing in temperature This is known because temperature is in fact the measure of the average kinetic energy of the molecules.

Explanation:

hope this helps❤️

[tex]\bold{Hello!}\\\bold{Your~Answer~Is~Below!}[/tex]

______________________________

[tex]\bold{Meanings:}[/tex]

  [tex]1.)~Homogenous~-~Particles~distributed~uniformly,~(Evenly.)[/tex]

        [tex]\left[\begin{array}{ccc}O&o&O\\o&O&o\\O&o&O\end{array}\right][/tex]

[tex]2.)~Heterogenous~-~Particles~distributed~non~uniformly,~(Random.)[/tex]

       [tex]\left[\begin{array}{ccc}o&O&O\\O&o&o\\O&o&o\end{array}\right][/tex]

[tex]3.)~Colloid~-~This~mixture~is~made~up~of~particles~that~can~not~be~seperated.[/tex]  

______________________________

[tex]\bold{Answer:}[/tex]

[tex]\bold{Soil~is~considered~a~heterogeneous~mixture}\\\bold{becuase~there~are~so~many~compontents~that~make~up~soil,~and~none~}\\\bold{of~them~are~ordered~evenly.}\\\\\bold{So~your~answer~is~\boxed{C.}}[/tex]

______________________________

[tex]\bold{Hope~this~helps,}\\\bold{And~best~of~luck!}\\\\\bold{~~~-TotallyNotTrillex}[/tex]

Answer:

A=8, B=7,C=N

D=26, E=30, F =Fe

Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus. It is the average weight of an element. It is the total number of nucleons in the atom's nucleus.

Explanation:

Hope this helps have a great day its kinda hard to put it in one sentence so uhh just read this and make it into one sentence  

Answer:

atomic number is equal to no.of protons or no.of electrons and no.of neutros+atomic num=atomic mass

Explanation:

in above give the correct explanation

Answer:

1) NaCl, 5)MgS

Explanation:

What makes something an Ionic Bond:

For 1) Na has a charge of 1+ and Cl has a charge of 1-. They both come together to form table salt. Their electronegativity is also larger than 2.0. Also Na is a metal and Cl ion is a nonmetal.

For 2) C and O are both nonmetals and are covalent bonds

For 3) Water is a polar covalent molecule because there is a electronegativity difference between H and O, but not great. H and O are also nonmetals.

For 4) While Fe is a metal and O is a nonmetal, their electronegativity difference is not greater than 2.0. This makes it polar covalent.

For 5) Mg is a metal and S is a nonmetal. They have a large electronegativity difference. Also Mg has a charge of 2+ while S has a charge of 2-.

Answer:

4P + 3O2 → P4O6

Explanation:

Chemical Equation Balancer Online!

The balanced chemical equation can be represented for the given reaction as:

[tex]4\;P + 3\;O_2\longrightarrow P_4O_6[/tex]

A chemical equation for a chemical reaction can be represented in terms of chemical symbols of the reactants and products. A balanced chemical equation in which the number of atoms of reactants and products is equal on either side of the equation.

The law of conservation of mass gives the idea that the total mass of both the reactant side and the product side is equal in a balanced chemical equation.

The given chemical equation has the given reaction:

[tex]4\;P + 3\;O_2\longrightarrow P_4O_6[/tex]

The number of phosphorous and oxygen atoms are equal on both sides of the arrow therefore it is a  balanced chemical equation. Therefore, the mass of the phosphorus and oxygen elements will be equal on the reactant as well as product side.

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Answer:

78.56 kg

Explanation:

45.1 + 33.46 = 78.56

Each organ system performs specific functions for the body, and each organ system is typically studied independently. However, the organ systems also work together to help the body maintain homeostasis. For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance.

Answer:

Explanation:

Answer:

element:a,c

compound:f

mechanical mixture

solution:b

colloid:e

suspension:d

Explanation: