An atom is determine to have 17 protons, 18 electrons, and 18 neutrons. What are the mass number and charge of this atom or ion

Answer:A

Explanation:

Answer:

V₂ = 530.5 mL

Explanation:

Given data:

Initial temperature = 20.0°C

Final temperature = 40.0 °C

Final volume = 585 mL

Initial volume = ?

Solution:

Initial temperature = 20.0°C (20+273 = 293 K)

Final temperature = 40.0 °C (40+273 = 323 K)

Solution:

The given problem will be solve through the Charles Law.

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

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₁ = V₂T₁ /T₂  

V₂ = 585 mL × 293 K / 323 K

V₂ = 171405 mL.K / 323 K

V₂ = 530.5 mL

Answer:

D. all of the above

Explanation:

edg 2021

A way that human modification of limiting factors causes unbalances in ecosystems. are habitat loss, pollution, and climate change. Option D. This is further explained below.

Generally, An ecosystem is a geographical region in which plants, animals, and other species, as well as weather and topography, coexist to produce a circle.

In conclusion, habitat loss, pollution, and climate change are all human modification of limiting factors causes unbalance in ecosystems.​

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CQ

which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above

Answer:

the anserw is 2

Explanation:

Ao H+HH OH

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Statements 6,9,13,14 are hypertonic, 8,10,12 hypotonic, and 7,11,15 are isotonic solutions.

6. Hypertonic

7. Isotonic

8. Hypotonic

9. Hypertonic

10. Hypotonic

11. Isotonic

12. Hypotonic

13. Hypertonic

14. Hypertonic

15. Isotonic

A hypertonic answer is any external solution that has excessive solute awareness and coffee water concentration as compared to frame fluids. In a hypertonic answer, the internet movement of water will be out of the frame and into the solution.

A hypotonic answer has a decreased awareness of solutes than some other answer. In biology, a solution outdoor of a cell is referred to as hypotonic if it has a decreased attention of solutes relative to the cytosol. because of osmotic stress, water diffuses into the cell, and the cell often appears turgid, or bloated.

A solution that has the same salt concentration as cells and blood. Isotonic answers are typically used as intravenously infused fluids in hospitalized sufferers. Isotonic solutions include electrolyte stability just like plasma in the bloodstream. whilst an isotonic solution is administered, the fluid extent of the affected person is elevated without a fluid shift. not unusual examples of isotonic solutions are zero.nine% ordinary saline and lactated ringers.

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Answer:

C

Explanation:

It is most likely non metal with a high electronegativity.

Homogeneous and heterogeneous mixture in colloid, suspension and solution

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension and within the categories of homogeneous and heterogeneous mixtures there are more specific types of mixtures including solutions is alloys, suspensions, and colloids and a solution is a mixture where one of the substances dissolves in the other and the substance that dissolves is called the solute

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Dalton's atomic theory was proposed by John Dalton in 1803. It states that elements are made up of indivisible atoms, atoms of the same element are identical, and atoms cannot be created or destroyed.

Dalton proposed that the concept of atoms might be used to explain the laws of definite proportions and the conservation of mass. In his theory, atoms—which he described as "solid, massy, hard, impenetrable, moving particle(s),"—are the minuscule, indivisible units that make up all matter.

It is significant to highlight that Dalton had no knowledge of the potential existence of interior structure in atoms because he lacked the tools necessary to observe or perform further experiments on individual atoms. In a molecular modeling kit, where the various components are represented by spheres of various sizes and hues, we may imagine Dalton's atom as a component. We now know that atoms are not solid spheres, despite the fact that this paradigm is useful in some situations.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.18 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 5.282392...[/tex]

We have the final answer as

Hope this helps you

Answer:

B.sugar solution

Explanation:

A sugar solution is not a compound.

Rather, the solution is a mixture and an impure substance.

Answer: same valence shell configuration and properties

Explanation:

Answer:

The given isotope is Br 80

If 35 protons present then its atomic number is 35

Mass number is 80 so its meutrons are 45 because proton+ neutron = mass number

Its electron are 36 because of negative one charge

Explanation:

Answer:

Law of multiple proportions

Explanation:

A 36.0 g sample of metal was heated from 0°C to 55.0°C. It absorbed 150 J of energy as heat then the specific heat of this piece of metal is 0.0758 J/g.°C  .

The term "specific heat" refers to the amount of energy needed to raise a substance's unit mass by one degree Celsius. This can be mathematically stated as:

q = m×c×ΔT,

where ,

q = the amount of heat

m = the mass of the substance

c = the respective substance's specific heat;

ΔT = the change in temperature.

So, if we want to determine the units for specific heat, we'll just isolate the term in the above formula to get

c = q / m × ΔT                    ( i )

Since heat is measured in Joules ( J ) , mass in grams ( g ) , and temperature in degree Celsius , we can determine that specific heat capacity from equation ( i )  by putting all the given data in this equation ,

c =  150 J / 36.0 g × 55.0 °C = 150 J / 1980 g.°C = 0.0758 J/g.°C

Therefore, specific heat is measured in Joules per g times degree Celsius.

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questions 3 gravity

question 1 meteorites

question 2 orbit

question 4 rocket and gaseous

Answer:

1. moons 2. orbits 3. gravity 4. rocky, gaseous

Explanation:

Answer:

Explanation:

Answer:

Decrease the distance between them or increase the mass.

Explanation:

F= GM1M2/ R²

Answer:

decrease the distance between the objects

Explanation:

i did the test and got da epic 100 score

Answer:

1+

Explanation:

the number of protons tells you which element it is in the periodic table, you can notice that there is 1 less electron that then there is protons which means that the element had to give 1 electron away. When you get rid of 1 e- you have 1 proton more that electrons so that's why it's 1+

also the element is Cr

Answer:

207g

Explanation:

Given compound:

            Ca(ClO₃)₂

The equivalent mass can be derived by summing the molar masses of each atom

  Molar mass of Ca = 40

                            Cl  = 35.5

                            O  = 16

Now solve;

 Molar mass  = 40 + 2(35.5 + 3(16)) = 207g

Answer:

n chemistry and physics, activation energy is the energy that must be provided to compounds to result in a chemical reaction.The activation energy (Eₐ) of a reaction is measured in joules per mole (J/mol), kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol). Activation energy can be thought of as the magnitude of the potential barrier (sometimes called the energy barrier) separating minima of the potential energy surface pertaining to the initial and final thermodynamic state. For a chemical reaction to proceed at a reasonable rate, the temperature of the system should be high enough such that there exists an appreciable number of molecules with translational energy equal to or greater than the activation energy. The term Activation Energy was introduced in 1889 by the Swedish scientist Svante Arrhenius.

Explanation:

Answer:

The activation energy for the forward reaction is the amount of free energy that must be added to go from the energy level of the reactants to the energy level of the transition state. The source of activation energy is typically heat, with reactant molecules absorbing thermal energy from their surroundings.

Explanation:

Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question we have

momentum = 45 × 1544

We have the final answer as

Hope this helps you

Answer:

69,480 kg. m/s

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Answer:

14.99 mols of CO2

Explanation:

STP= 273 k , 1 atm , .0821 gas constant

N=PV/RT

N= 1x336/.0821x273

14.99 mols of CO2

659.6 grams of CO2

Answer:

2Na + 2H2O ----> 2NaOH + H2

Explanation:

Answer:

0.1 M molar NaaOH

Explanation:

M1V1= M2V2

M1 = 0.150M NaOH

V1=100 ml

V2=150 ml

M2=?

M2= M1V1/V2

M2= 0.150*100/150=0.1 M

The graph (A) best represents the relationship between the volume and the pressure of a gas.

The force was applied perpendicular to an object's surface per unit area across which that force is spread is known as pressure. The relationship between pressure and volume can be understand with the aid of ideal gas law.

PV=nRT.

where, P is pressure, V is volume.

It can be seen that when temperature will kept constant then pressure will be inversely proportional to the volume. It can be shown as:

P ∝ 1/V.

Therefore, graph A represent relationship between pressure (P) and volume (V).

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The process of photosynthesis converts light energy into stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.

Utilizing a process called photosynthesis, plants and other living things may transform light energy into chemical energy that can then be released through cellular respiration to power their activities. Photosynthesis, from the Greek phs (light) and synthesis (putting together), derives from the fact that some of this chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are created from carbon dioxide and water.

Photoautotrophic organisms, such as the majority of plants, algae, and cyanobacteria, carry out photosynthesis. The majority of the energy required for life on Earth is produced and maintained through photosynthesis, which is also primarily responsible for producing and maintaining the oxygen concentration of the Earth's atmosphere.

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Your answer would be an Arrhenius base

Hope this helps

Answer:

2Zn(s) + O2(g)------2Zno