Which of the following pairs is mismatched?
I. 180 days = 259200 seconds
II. 4 gallons = 15 liters
Ill. log(100) = 2
IV. In (1) = 1

a. I and III
b. II and III
c. I and IV
d. III and IV

Answer:

Copper will start to react with the oxygen in the air to form copper oxide. The copper oxide will continue reacting to oxygen over time. As the copper oxide continues to react with carbon dioxide and water in the air it coats the surface with that iconic blue-green patina colour

Answer:

51 L

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of nitrogen

The volume of a gas is inversely proportional to the pressure. If we consider nitrogen as an ideal gas at a constant temperature, we can find the final volume using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁ / P₂

V₂ = 90 kPa × 22.5 L / 40 kPa

V₂ = 51 L

To produce 28.8 g of water 4.81 x 10²³ molecules of O₂ will be required

The limiting reactant (or limiting reagent) is the reactant that gets consumed first in a chemical reaction and therefore limits how much product can be formed.

According to given equation;

2H₂ + O₂ ---> 2H₂O

If 36 g of H₂O (2 mole) is produced by 1 mole O₂ i.e, 32 gram.

Therefore, 28.8 g of H₂O is produced by ;

32/36 x 28.8 = 25.6 g of O₂

Number of molecules of O₂ = given weight / molecular weight x 6.023 x 10²³

                                              = 25.6 / 32 x 6.023 x 10²³

                                              = 4.81 x 10²³ molecules of O₂

Therefore,4.81 x 10²³ molecules of O₂ will be required to produce 28.8 g of water.

Learn more about Limiting reagent here ;

https://brainly.com/question/20070272

#SPJ1

If number of bonds is three (3) then bond angle is 120° and structure is trigonal and if number of bonds is four( 4) then bond angle will be 109° 28' and structure is tetrahedral.

The angle between two bonds in a complex molecule or between two orbitals that include bonding electron pairs encircling the core atom is the bond angle. It is calculated and represented in degrees using a spectroscopic method.

When a single electron pair there at central atom begins to resist the bound pair of electrons, the bond angle decreases and the bonds are slightly shifted inward. When there is a increase in back bonding, the bond angle increases.

To know more about bond angle visit :

https://brainly.com/question/6179102

#SPJ1

Explanation:

Arsenic is a solid chemical element that is used especially in wood preservatives, alloys, and semiconductors and is extremely toxic in both pure and combined forms.

A poisonous trioxide As2O3 or As4O6 of arsenic is used especially as an insecticide or weed killer.

5.2*\(10^{-4}\) is the solubility product constant Ksp.

What makes KSP a solubility product?

The explanation is that it stays at the same concentration throughout the process. Ksp, then, stands for the greatest degree to which a solid can dissolve in a solution. Ksp, also known as the solubility product constant, is the result of the ion concentrations in a saturated solution of an ionic substance.

The equilibrium constant known as the solubility product constant, or Ksp, measures how much an ionic substance dissolves in water. We can compare the Ksp values of compounds to assess their respective solubilities if they dissolve to create the same number of ions.

Pb\(Cl_{2}\)(s)  ↔ \(Pb_{2}\)+(aq)   +  2Cl-(aq)

Ksp  = [Pb2+] [Cl-]^2

Ksp  = S* 2S

S is 1.62×\(10^{-2}\)

Ksp  = 1.62×\(10^{-2}\)* 2 * 1.62×\(10^{-2}\)

Ksp  = 5.2*\(10^{-4}\)

To learn more about solubility product constant use:

brainly.com/question/1419865

#SPJ1

5.2*\(10^{-4}\)  is the solubility product constant Ksp.

What makes KSP a solubility product?

The explanation is that it stays at the same concentration throughout the process. Ksp, then, stands for the greatest degree to which a solid can dissolve in a solution. Ksp, also known as the solubility product constant, is the result of the ion concentrations in a saturated solution of an ionic substance.

The equilibrium constant known as the solubility product constant, or Ksp, measures how much an ionic substance dissolves in water. We can compare the Ksp values of compounds to assess their respective solubilities if they dissolve to create the same number of ions.

Pb(s)  ↔ +(aq)   +  2Cl-(aq)

Ksp  = [Pb2+] \([Cl-]^{2}\)

Ksp  = S* 2S

S is 1.62×\(10^{-2\)

Ksp  = 1.62× \(10^{-2\)*2 * 1.62×\(10^{-2\)

Ksp  = 5.2* \(10^{-4}\)

To learn more about solubility product constant use:

brainly.com/question/1419865

#SPJ1

Answer:

3) 1.25

Explanation:

I had the same question and somehow got it right :)

The new volume will be determined by molarity and which will be  1.25 ml.

The volume of an object is just a measurement of how much space it takes up.

The molality refers to the moles of a solute in relation to the mass of the solvent, whereas the molarity refers to the moles of a solute in based on the volume of the solution. It can be denoted by M.

The formula of Molarity is

\(M_{1} V_{1} =M_{2}V_{2}\)

where, M is molarity and V is volume.

Calculation of volume.

It is given that,\(M_{1} = 0.1 M, M_{2} =0.0025 M.\)

Now, puts the value of given data in molarity equation.

\(M_{1} V_{1} = M_{2} V_{2}\)

\(V_{1} = M_{2} V_{2} /M_{1}\)

\(V_{1}\) = 0.005×25/0.1 = 1.25 ml

Therefore, the correct answer will be option 3.

To know more about molarity and volume click here.

https://brainly.com/question/20366625.

#SPJ2

Answer:

gguhg

Explanation:

no te es caso drama me están muy una las y y que las te

Answer:

C

Explanation:

According to the activity series, Li can displace Zn to give LiCO3

Answer:

development of cancer drugs

Explanation:

Element widths in responsive designs are often specified in percentages with the size of each element relative to the width of its parent.

Responsive design refers to an approach of web page creation that involves use of flexible layouts, flexible images, and cascading style sheet media queries. The objective of responsive design is to develop web pages that detect the visitor's screen size and orientation and change the layout accordingly. In other words, responsive web design refers to a method that simply reflows, adjust, reposition, resize overall content and images according to width of browser or screen size. Responsive websites are designed to provide accessibility across all devices regardless of size of device screen. Element widths in responsive designs are often represents a percentage value which is often used to define a size as relative to an element's parent object.

Learn more about Responsive design:

https://brainly.com/question/16805626

#SPJ4

Two solutions with the same concentration can have differing amounts of total solute particles because concentration depends on the amount of solute per unit volume of solution.

For example, if we dissolve 1 gram of lemonade powder in 100 mL of water, we have a certain concentration of lemonade particles in the solution. If we dissolve the same amount of lemonade powder in 500 mL of water, we have the same concentration of lemonade particles, but the total number of particles is different.

In the case of concentrated lemonade solution and the glass of lemonade, the concentration of lemonade particles is the same in both solutions. However, the pitcher of lemonade contains more total lemonade particles because it has a larger volume of solvent (water) than the glass of lemonade. In other words, the concentration of lemonade particles is the same, but the amount of solvent (water) is different. Therefore, the total number of particles (lemonade mix particles and water molecules) is different in the two solutions.

Learn more about concentration here:

https://brainly.com/question/28480075

#SPJ1

In essence, there is no chemical reaction between ammonia and water. Although it is frequently said to produce NH₄OH, the overall response is:

H₂O + NH₃ = NH₄⁺ + OH⁻

You might compare the acid strength of H₂O (pka 15.7) and NH4⁺ (pka 9.24) or the base strength of NH₃ and OH⁻ to see which way the reaction would proceed. The reaction would shift to the weaker acid (H₂O) or the weak base in either case (NH₃). Despite what the bottle claims, weak doesn't make strong. I mean, there might be a small amount of NH₄⁺ and OH⁻ in the air, but not much.

The iron (III) ion forms an insoluble hydroxide and precipitates out of solution when ammonia is added to the solution.

To know more about reaction of ammonia, please refer:

https://brainly.com/question/9432528

#SPJ1

Answer:

12.5 grams

Explanation:

Answer:

69.647g Ag

Explanation:

First, determine the molecular weight of \(Ag_2S\):

Atomic Mass Ag = 107.87 \(\frac{g}{mol}\)

Atomic Mass S = 32.07 \(\frac{g}{mol}\)

So,

Molecular Weight \(Ag_2S\) = 2(107.87\(\frac{g}{mol}\))+(32.07\(\frac{g}{mol}\))

Molecular Weight \(Ag_2S\)=247.81\(\frac{g}{mol}\)

Then determine the mass of silver contained in the sample:

\(80.0gAg_2S(\frac{1molAg_2S}{247.81g})(\frac{2molAg}{1molAg_2S})(\frac{107.87gAg}{1molAg})=69.647gAg\)

This answer makes sense because the mass of silver in the compound must be less than the total mass of the compound.

Answer:

A harmless nuclear fallout

Explanation:

just did this

The percentage by mass of hydrogen can be calculated from the problem as 2.016

To calculate the mass percent of an atom in a compound, you first need to determine the molar mass of the compound and the molar mass of the atom of interest.

Determine the molar mass of the compound by adding up the atomic masses of all the atoms in the compound.

Determine the number of moles of the atom of interest in one mole of the compound. This is done by dividing the atomic mass of the atom by the molar mass of the compound.

We know that the relative molecular mas of the compound is; 300 g/mol

Then;

Percent by mass of hydrogen is; 6/300 * 100/1

= 2.016%

Learn more about percent by mass:https://brainly.com/question/5394922

#SPJ1

Answer:

Method 1 - precision

Method 2 - accuracy

Method 3 - precision

Method 4 - accuracy

Explanation:

The accuracy of a method refers to how close the experimental result is to the accepted value. Accuracy could be checked by carrying out the required test on the standard and not on the sample or by adding a known amount of analyte to the sample so that the results obtained can be carefully compared.

Precision on the other hand, refers to how close the results of a replicate analysis are to each other. In testing for precision, the analysis must be carried out several times, in order to check how close the results are to each other.

Answer:

D. Thermal energy increases as the atoms and molecules in a system move more.

Explanation:

Thermal energy is a form of kinetic energy possessed by molecules of a system. The measure of this kinetic energy in an atom is called heat.

The average kinetic energy of a system is the temperature.

The solid lines on a topographic map typically represent contour lines, which are used to show the changes in elevation of the land surface.

A topographic map is used to represent the three-dimensional features of the terrain on a two-dimensional surface. The topographic map shows the location, shape, and elevation of natural and man-made features on the earth's surface, such as hills, valleys, rivers, lakes, roads, buildings, and contour lines.

These lines connect points of equal elevation and show the shape and slope of the terrain. They can be used to visualize the topography of an area and can be useful for navigation, planning hikes, and other outdoor activities.

Find out more on topographic map here: https://brainly.com/question/181146

#SPJ1

Answer:

Distance lift the tree = 0.5 m

Explanation:

Given:

Work done = 50 joules

Force = 100 newton

Find:

Distance lift the tree

Computation:

Distance = Work done / Force

Distance = 50 / 100

Distance = 0.5 m

Distance lift the tree = 0.5 m

Answer:

Science is:

objective

based on fact

must be ethical

Explanation:

Science is considered to be objective because it is based on empirical evidence and systematic observation, and it strives to eliminate personal bias and opinions from the scientific process. Science is based on fact, as it relies on repeatable and verifiable experiments to test hypotheses and theories. And, it is important for science to be ethical because the scientific community has a responsibility to ensure that research is conducted in an ethical and responsible manner, and that the results are reported accurately and honestly.

The mass, in grams of 1.16 mole of water, H₂O is 20.88 g

The mole of a substance is related to it's mass and molar mass according to the following equation

Mole = mass / molar mass

With the above formula, we can obtain the mass of H₂O

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

The mass of 1.16 mole of water can be obtained as illustrated below:

Mole = mass / molar mass

Cross multiply

Mass = mole × molar mass

Mass of H₂O = 1.16 × 18

Mass of H₂O = 20.88 g

Learn more about mole:

https://brainly.com/question/13314627

#SPJ1

Answer:

Compound 1 - Can't decide

Compound 2 - Can't decide

Compound 3 - molecular

Explanation:

The solid that has been designated as compound 1 is difficult to really classify because, we can see that the solid only became hot when heated but does not soften. This can be an attribute of an ionic solid. However, the same solid is not soluble in water. This insolubility in water is a property of molecular solids. As a result of these, we will find it difficult to classify the solid.

Compound 2 is also difficult to decide upon because ionic solids are crystalline and can not be ground into powder. Amorphous substances can be ground into powder easily. Then, we can see that the substance does not conduct electricity in block form but does so when moistened. This means that we can not conveniently classify it as a molecular solid since molecular substances do not conduct electricity.

A molecular substance usually has a low melting and freezing point and also does not conduct electricity hence compound 3 is molecular solid.

Answer:

1.45 x 10⁻² g CO₂

Explanation:

To find the mass of carbon dioxide, you need to (1) convert grams CH₄ to moles CH₄ (via molar mass), then (2) convert moles CH₄ to moles CO₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles CO₂ to grams CO₂ (via molar mass). The final answer should have 3 sig figs to reflect the given value (5.30 x 10⁻³ g).

Molar Mass (CH₄): 12.011 g/mol + 4(1.008 g/mol)

Molar Mass (CH₄): 16.043 g/mol

Combustion of Methane:

1 CH₄ + 2 O₂ ---> 2 H₂O + 1 CO₂

Molar Mass (CO₂): 12.011 g/mol + 2(15.998 g/mol)

Molar Mass (CO₂): 44.007 g/mol

5.30 x 10⁻³ g CH₄          1 mole              1 mole CO₂          44.007 g
---------------------------  x  ----------------  x  ---------------------  x  -----------------  =
                                      16.043 g            1 mole CH₄            1 mole

=  0.0145 g CO₂

=  1.45 x 10⁻² g CO₂

The gas that has the least collisions between its particle is helium at 20° C. The correct option is A.

Collision is a term used when two particles or object collides or clash and there is an exchange or transformation of energy between them. When a collision happens, the force is exerted on each other.

Helium is the second most abundant element present in the atmosphere. It is the lightest gas and its particle collides when there is an increase in the temperature.

Thus, the correct option is A. Helium at 20° C., regarding the collision of particles between its particles.

Learn more about the collision, here:

https://brainly.com/question/27453270

#SPJ5

Answer:

0.773 mole

Explanation:

From the question given above, the following were obtained:

Mass of dinitrogen oxide (N₂O) = 34 g

Mole of N₂O =.?

Next, we shall determine the molar mass of N₂O. This can be obtained as follow:

Molar mass of N₂O = (14 × 2) + 16

= 28 + 16 = 44 g/mol

Finally, we shall determine the number of mole in 34.0 g of dinitrogen oxide (N₂O) as follow:

Mass of dinitrogen oxide (N₂O) = 34 g

Molar mass of N₂O = 44 g/mol

Mole of N₂O =.?

Mole = mass /Molar mass

Mole of N₂O = 34/44

Mole of N₂O = 0.773 mole

Therefore, 0.773 mole is present in 34 g of dinitrogen oxide

The experiment involved measuring the temperature changes of water and solutions containing sodium hydroxide and hydrochloric acid.

What is HCl?

HCl is the chemical formula for hydrogen chloride, a colorless, highly pungent gas. It is a strong acid that is commonly used in industry for a variety of applications, such as the production of PVC, food processing, and metal cleaning. It is also found naturally in the stomach as a component of gastric acid, where it aids in digestion. In water, HCl dissociates into H+ and Cl- ions, making it a strong electrolyte.

The purpose of the experiment was to determine the heat of solution of sodium hydroxide and the heat of neutralization between sodium hydroxide and hydrochloric acid, using various methods such as enthalpy, Qsurr & Qrxn, percent error, etc.

Learn more about HCl from the given link

https://brainly.com/question/27576431

#SPJ1