Adding enough _____ to a system can change the substance in a system

Answer:

Earth is made of several subsystems or "spheres" that interact to form a complex and continuously changing whole called the Earth system.  to thousands of kilometers, and on time scales that range from milliseconds to billions of years of the Earth; earthquake; Examples of long term - making coal; plate tectonics

Explanation:

Answer:

F = ma, where F is the force acting on the body, m is the mass of the body, and a is the acceleration of the body. Therefore, the force acting on the ball is 4Newtons.

Explanation:

1) The student which is neither precise nor accurate is student B

2) The student which is most accurate on any single trial is student A

3) The student that is both precise and accurate is student C

4) The student which is precise but not accurate is student D

The term precision has to do with the fact that the values of the measurement are close together. Precise values do not scatter a lot. They vary within a narrow range.

An accurate measurement is one that is close to the true value. This means that it does not differ so much from the true value of the measurement.

Hence;

1) The student which is neither precise nor accurate is student B

2) The student which is most accurate on any single trial is student A

3) The student that is both precise and accurate is student C

4) The student which is precise but not accurate is student D

Learn more about precision and accuracy:https://brainly.com/question/15276983

#SPJ1

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

The question is incomplete, the complete question is:

When 177. g of alanine \((C_3H_7NO_2)\) are dissolved in 800.0 g of a certain mystery liquid X, the freezing point of the solution is \(5.9^oC\) lower than the freezing point of pure X. On the other hand, when 177.0 g of potassium bromide are dissolved in the same mass of X, the freezing point of the solution is \(7.2^oC\) lower than the freezing point of pure X. Calculate the van't Hoff factor for potassium bromide in X.

Answer: The van't Hoff factor for potassium bromide in X is 1.63

Explanation:

Depression in the freezing point is defined as the difference between the freezing point of the pure solvent and the freezing point of the solution.

The expression for the calculation of depression in freezing point is:

\(\Delta T_f=i\times K_f\times m\)

OR

\(\Delta T_f=i\times K_f\times \frac{m_{solute}\times 1000}{M_{solute}\times w_{solvent}\text{(in g)}}\) ......(1)

\(\Delta T_f=5.9^oC\)

i = Vant Hoff factor = 1 (for non-electrolytes)

\(K_f\) = freezing point depression constant

\(m_{solute}\) = Given mass of solute (alanine) = 177. g

\(M_{solute}\) = Molar mass of solute (alanine) = 89 g/mol

\(w_{solvent}\) = Mass of solvent = 800.0 g

Putting values in equation 1, we get:

\(5.9=1\times K_f\times \frac{177\times 1000}{89\times 800}\\\\K_f=\frac{5.9\times 89\times 800}{1\times 177\times 1000}\\\\K_f=2.37^oC/m\)

\(\Delta T_f=7.2^oC\)

i = Vant Hoff factor = ?

\(K_f\) = freezing point depression constant = \(2.37^oC/m\)

\(m_{solute}\) = Given mass of solute (KBr) = 177. g

\(M_{solute}\) = Molar mass of solute (KBr) = 119 g/mol

\(w_{solvent}\) = Mass of solvent = 800.0 g

Putting values in equation 1, we get:

\(7.2=i\times 2.37\times \frac{177\times 1000}{119\times 800}\\\\i=\frac{7.2\times 119\times 800}{2.37\times 177\times 1000}\\\\i=1.63\)

Hence, the van't Hoff factor for potassium bromide in X is 1.63

Answer:

449 g/L

0.449 g/mL

Explanation:

Step 1: Given data

Step 2: Calculate the density (ρ) of the baseball in g/L

The density is equal to the quotient between the mass and the volume.

ρ = m / V

ρ = 350 g / 0.780 L

ρ =449 g/L

Step 3: Convert ρ from "g/L" to "g/mL"

We will use the conversion factor 1 L = 1000 mL.

449 g/L × (1 L/1000 mL) = 0.449 g/mL

Man weight will be multiplied by 0.001. S o option (b) is correct.

Density is defined as depending on the units of mass and volume used for the calculation, different units are used. The units for density would be kg/cm3 if the mass was measured in kg and the volume in cm3.

Density = Mass divided by volume.

Given a man shrinks proportionality to 1/10 of the original height

Now as it is the proportional overall area will also be decreased by (1/10)^2 = 1/ 100 times

Therefore overall decrease in volume = 1/10 x 1/100

= 1 / 1000 times(v/1000)

Mass/ volume = Q (density)

Here Q remains constant

Hence M initial = Q x V

M final = QV/1000

Initial weight = QV x g

= QVg

Final Weight = (QV/1000) x g

Final /Initial = QVg/1000QVg

= 1/1000

= 0.001

Therefore his weight will be multiplied by 0.001

To learn more about density visit

https://brainly.com/question/29775886

#SPJ4

A reaction that looks to follow second-order kinetics but is not actually a second-order reaction is described by the pseudo-second order (PSO) model.

A chemical reaction that looks to follow second-order kinetics but is not actually a second-order reaction is referred to as pseudo second order (PSO) in a kinetic model.

It is frequently seen in reactions where one reactant's concentration is substantially higher than that of the other reactant, resulting in an abundance of the abundant reactant that remains essentially constant throughout the reaction.

The rate equation in PSO kinetics has the following structure:

1/t = k * [A] * [B]

where [A] and [B] stand for the reactant concentrations, k for the rate constant, and t for the passage of time. According to the equation, the rate of the reaction is inversely proportional to the product of the reactant concentrations.

The consumption of the limiting reactant, which determines the total reaction rate, is what causes the apparent second-order behaviour. The rate of the reaction falls together with the concentration of the limiting reactant with time.

Adsorption reactions, surface reactions, or situations where one reactant is present in excess of the other are frequently described by the PSO model. The PSO model is an approximation and does not imply a real second-order reaction mechanism, it is vital to remember this.

For more such question on reaction. visit :

https://brainly.com/question/11231920

#SPJ8

Answer:

conservation of mass

The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.

To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.

The ideal gas law equation is given by:

PV = nRT

Where:

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

At STP, the pressure is 1 atm, and the temperature is 273.15 K.

From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.

Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.

Therefore, the volume of I2 gas formed is 21 L.

For more such questions on volume

https://brainly.com/question/1749900

#SPJ8

Based on the given data, the amount of products from 5.00 g of KClO₃ is:

The decomposition of KClO₃ is given by the equation below:

2 KClO₃  -----> 2 KCl + 3 O₂

2 moles of KClO₃ produces 2 moles of KCl and 3 moles of O₂

Molar mass of KClO₃ is 122.5 g/mol

molar mass of KCl = 74.5 g

molar mass of O₂ = 32 g

Moles of KClO₃ in 5.00 g = 5.00/122.5

For KCl

a. moles: 0.04 moles of KClO₃ will produce 0.04 moles of KCl

b. mass of KCl = 0.04 * 74.5 = 2.98 g KCl

c. number of molecules of KCl = 0.04 * 6.02 * 10²³ = 2.41 * 10²² molecules of KCl

For O₂:

a. moles of O₂; 0.04 moles of KClO₃ will produce = 0.06 moles of O₂.

b. mass of O₂ = 0.06 * 32 g = 1.92 g of O₂

c. number of molecules: 0.06 * 6.02 * 10²³ = 3.61 * 10²² molecules of O₂

Therefore, the amount of products from 5.00 g of KClO₃ is:

Learn more about moles and molecules at: https://brainly.com/question/26135244

Answer:Features very high tensile strength and toughness. Titanium alloys are light in weight, have superior corrosion resistance properties and can withstand extreme temperatures. ... Titanium alloys are heat-treated to increase their strength in terms of fracture toughness, fatigue strength and high temperature strength.35 grams is the sollubility.

Explanation:

Copper metal has a mole weight of 0.45 moles. the complementary interaction of copper and aluminum. 0.45 moles of copper nitrate.

Sodium is created when sodium chloride and silver nitrate combine. Next, we must determine how many moles of each reactant there are. This molarity concentration unit connects moles of solute to volume of solution. Chemical processes are expressed in terms of moles of reactants and products. Aluminum oxide is created when aluminum and oxygen react.  The lowest set of whole number coefficients in a balanced equation.

to know more about copper nitrate please visit.

https://brainly.com/question/12768349

#SPJ4

By focusing on certain fields, precision management can assist farmers in using less fertiliser. Option D is the right choice as a result.

In 1994, Precision Management was founded with the express purpose of offering customers comprehensive, effective, and personalised property management services while concentrating on and achieving their goals and objectives. Precision has developed friendships as well as commercial ties during the past 25 years. Our clients value Precision's distinctive, hands-on management approach and the company's overall commitment to their assets. By focusing on certain fields, precision management can assist farmers in using less fertiliser.

Therefore, the correct option is option D.

To know more about Precision management, here:

https://brainly.com/question/31721041

#SPJ1

The balanced chemical equation for the reaction between strontium and oxygen can be written as follows: 2 Sr (s) + \(O_2\)(g) → 2 SrO (s).

In this equation, solid strontium (Sr) reacts with gaseous oxygen (\(O_2\)) to produce solid strontium oxide (SrO).

To determine the mass of product expected to form in this reaction, we need to consider the molar ratio between strontium and strontium oxide. From the balanced equation, we can see that 2 moles of strontium react to produce 2 moles of strontium oxide.

The molar mass of strontium (Sr) is 87.62 g/mol, and the molar mass of strontium oxide (SrO) is 119.62 g/mol. Since the molar ratio is 1:1 between strontium and strontium oxide, the mass of strontium oxide formed will be equal to the mass of strontium used.

In this case, the student added 4.93 g of strontium to the crucible. Therefore, the expected mass of strontium oxide formed will also be 4.93 g.

It's important to note that this calculation assumes that the reaction proceeds to completion, meaning that all of the strontium reacts with oxygen. In actual laboratory conditions, the yield of the reaction may be less than 100% due to factors such as incomplete reaction, side reactions, or product loss.

For more such questsion on balanced chemical equation visit:

https://brainly.com/question/11904811

#SPJ8

Answer:

b or c but I would just pick c

Answer:

C

Explanation:

Sun is an energy source not a matter.

Option (e) is correct. Alcohol is not a humectant because it binds to water and dehydrates the body.

Humectant is a substance which is used to keep things moist. A humectant attracts and retains the moisture in the air nearby via absorption. Sorbitol is a naturally occurring polyol. It is widely used in the food industry as a humectant. Sorbitol is a good humectants. Glycerol is a humectant which is most often derived naturally from vegetable oils. Humectants work to preserve other skincare ingredients and retain moisture by drawing water from the surface of your skin down into the deeper skin layers. Lanolin oil softens the skin and is a good humectant making it ideal for use in you skin care products. Methyl is an extremely effective humectant for both rinse off and leave on products. It is recommended for use in skin care products including lotions and creams.

To learn more about Humectant please visit:

https://brainly.com/question/947751

#SPJ4

Explanation:

a) We have to find the number of moles of oxygen gas that are present in 22 g of it. To convert from grams to moles we usually use the molar mass. To find the molar mass of oxygen gas we need the atomic mass of O.

atomic mass of O = 16.00 amu

molar mass of O = 16.00 g/mol

molar mass of O₂ = 2 * 16.00 g/mol

molar mass of O₂ = 32.00 g/mol

moles of O₂ = 22 g * 1 mol/(32.00 g)

moles of O₂ = 0.6875 moles = 0.7 moles

b) 2 CO₂ --> 2 CO + O₂

According to the coefficients of the reaction 2 moles of CO₂ will produce 2 moles of CO and 1 mol of O₂. Then the molar ratio between CO₂ and O₂ is 2:1. We will use that ratio to find the number of moles of CO₂ that are required to produce 0.7 moles of O₂.

2 moles of CO₂ : 1 mol of O₂

moles of CO₂ = 0.7 moles of O₂ * 2 moles of CO₂/(1 mol of O₂)

moles of CO₂ = 1.4 moles

Answer:

a) Percy has to produce 0.7 moles of oxygen gas.

b) 1.4 moles of carbon dioxide are required.

Answer:

Graduated cylinder vs Beaker

Both graduated cylinders and beakers are pieces of laboratory glassware that have a specific function. Graduated cylinders typically are more accurate at reading the volumes of the liquid inside. Beakers are better for stirring and mixing liquids

Explanation:

Answer: A model would be useful because the model makes the concepts easier to understand.

Explanation:

Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.

The mass of the barium carbonate is 0.286 g.

The term titration refers to the manner by which we could be able to obtain the volume of a solution and then use it to estimate the amount of the analyte that is present in the reaction. When we carry out a back titration, we are essentially trying to titrate the excess that is left over.

Now we have the fact that the reaction reaction the sodium hydroxide and the excess hydrochloric acid during the back titration yields a 1:1 reaction. Thus the amount of HCl left over is;

22.48/1000 L * 0.1082

= 0.0024  moles

The amount of HCl used in the first reaction is;

25/1000 L * 0.2120 M

= 0.0053 moles

Amount of used HCl =   0.0053 moles - 0.0024 moles  = 0.0029 moles

Given that;

1 mole of barium carbonate reacts with 2 moles of acid

x moles of barium carbonate reacts with 0.0029 moles  of acid

x = 1 mole  * 0.0029 moles/ 2moles

x = 0.00145 moles

Mass of barium carbonate =   0.00145 moles * 197.33 g/mol = 0.286 g

Learn more about titration:https://brainly.com/question/2728613

#SPJ1

The reaction between A and B is reactant favored. This  inference can be drawn from the graph.

Chemical reactions occur all around us, including in our body's digestion of food and the creation of the sunlight's light. Understanding both chemical and physical alterations is crucial before starting any chemical reactions. The best illustration of a chemical and physical alteration is a burning candle. The reaction between A and B is reactant favored. This  inference can be drawn from the graph.

Therefore, the correct option is option A.

To know more about Chemical reaction, here:

https://brainly.com/question/29039149

#SPJ1

Answer:

Carbon is stored on our planet in the following major sinks (1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere; (3) as organic matter in soils; (4) in the lithosphere as fossil fuels and sedimentary rock deposits such as limestone, dolomite

Answer:

D.ionic interaction is a strong interaction

When atoms come close enough to one another, an ionic connection is created. Atoms can interact with one another ionically, and this distance is greater than the bonding distance. Therefore, option D is correct.

The main interaction taking place in ionic compounds is ionic bonding, a form of chemical bonding that includes the electrostatic attraction between two atoms or ions with dramatically differing electronegativities.

Ions with opposing charges are drawn to one another through ion-ion interactions. They are also known as ionic bonds, because they are what keep ionic compounds together. opposing charges attract each other whereas like charges repel each other.

The whole transfer of valence electrons between atoms is referred to as an ionic bond. It is a kind of chemical connection that produces two ions with opposing charges. In ionic bonding, the nonmetal receives the electrons to become a negatively charged anion while the metal gives them up to become a positively charged cation.

Thus, option D is correct.

To learn more about ionic interaction follow the link;

https://brainly.com/question/4082308

#SPJ5

Answer:

To determine the identity of metal X, we need to compare the standard reduction potentials of the possible metals with the standard reduction potential of the Mg half-reaction.

From Table 18.1, we can find the standard reduction potentials for each of the metals listed:

Pb: -0.13 V

Zn: -0.76 V

Ni: -0.25 V

Fe: -0.44 V

Mn: -1.18 V

The reduction half-reaction for the Mg electrode is:

Mg2+ + 2e- → Mg E° = -2.37 V

The overall reaction for the galvanic cell is:

Mg(s) + X2+(aq) → Mg2+(aq) + X(s)

The standard cell potential is given by:

E°cell = E°(cathode) - E°(anode)

where the cathode is the reduction half-reaction and the anode is the oxidation half-reaction.

Substituting the given values, we get:

1.61 V = E°(X2+/X) - (-2.37 V)

Simplifying, we get:

E°(X2+/X) = 1.61 V + 2.37 V = 3.98 V

Comparing E°(X2+/X) with the standard reduction potentials in Table 18.1, we see that only zinc (Zn) has a reduction potential that is more negative than 3.98 V. Therefore, the metal X is zinc (Zn).

Therefore, the answer is (b) Zn.

Answer:

20M or 20mol/L

Explanation:

molarity = moles/volume (in Liters)

= 2.5/0.125L

=20M or 20 mol/L