Using the excerpt from the periodic table, which statement MOST accurately explains the chemical behavior of a pair of elements?
A
Boron and Carbon have similar chemical behavior because their atomic numbers are about the same.
B
Nitrogen and Oxygen have similar chemical behavior because both are gases
С
Nitrogen and Oxygen have similar chemical behavior because they can react easily to form nitrogen dioxide.
D
Boron and Aluminum have similar chemical behavior because they belong to the same group on the periodic table.
©2020 Illuminate Education, Inc.
Type here to search
о

Answer:

Only thing that should hold constant is the Density of the water

Explanation:

Since you are removing some of the water, the Mass and Volume will decrease.

Density of the water are the properties should have the same value for both of her measurements.

The density can be described as the mass per unit volume like it is the ratio between mass and volume, how much stuff an object has in a unit volume.

Density is a determining factor of matter, where it shows how tightly the matter is crammed together, the term was discovered by the Greek scientist Archimedes

The density can be calculated as the mass (m) can be divided by the volume (v)

Density = Mass/Volume

The SI unit of density is kilogram per cubic meter (kg/m3).

Learn more about density, here:

brainly.com/question/15164682

#SPJ2

Answer:

 Locations at a higher altitude have colder temperatures

Explanation:

brainliest please

Answer:

216 K

Explanation:

T2=T1P2/P1

Change C to K

Answer:

21.92 gm

Explanation:

A 1.5 M  solution would have 1.5 * 58.44 = 87.66 gm per liter

   you only need 1/4 of this (250 ml)    =  21.92 gm

Answer:

23

This particular isotope of potassium-42 contains 42 nucleons (i.e., protons and neutrons, combined;) Like other isotopes of potassium 19 out of these nucleons are protons; the rest 42−19=23 are therefore neutrons.

Answer:

23 neutrons

Explanation:

The order of decreasing reactivity towards electrophilic aromatic substitution is as follows: ortho > para > meta.

This is known as the "ortho-para-meta" rule. This is due to the electron-withdrawing effect of the substituents. The ortho and para positions are the least stable due to the presence of a strong electron-withdrawing group.

As a result, they are the most reactive towards electrophilic substitution. The meta position is the most stable due to the presence of an electron-donating group and is the least reactive.

So, the correct order of decreasing reactivity towards electrophilic aromatic substitution is as follows: ortho > para > meta.

For more questions like Electrophilic click the link below:

https://brainly.com/question/17517332

#SPJ4

Sodium and chlorine are attracted to each other because of their opposite charges. Sodium has one valence electron that it can easily lose to become a positively charged ion. Chlorine has seven valence electrons and needs one more electron to complete its octet.

When sodium and chlorine combine, sodium gives its valence electron to chlorine, forming a positively charged sodium ion (Na+) and a negatively charged chloride ion (Cl-).The electrostatic force of attraction between the positive and negative ions causes them to come together to form an ionic bond.

The attraction between sodium and chlorine is strong enough to overcome the natural repulsion between their electrons. This results in a stable compound known as sodium chloride (NaCl), or table salt.This attraction between sodium and chlorine is an example of ionic bonding. Ionic bonding is the electrostatic attraction between ions of opposite charge.

To know more about chlorine visit:

https://brainly.com/question/19460448

#SPJ11

The equilibrium shifts to the right.When additional reactants are added to a system at equilibrium, the equilibrium shifts in the direction that consumes the added reactants.

In this case, PCl5 is a reactant in the reaction it is involved in, which can be represented as PCl5 ⇌ PCl3 + Cl2. Therefore, adding more PCl5 to the system will cause the equilibrium to shift to the right, resulting in an increase in the concentrations of PCl3 and Cl2 and a decrease in the concentration of PCl5.

This ensures that the reaction consumes the added PCl5 and maintains the equilibrium constant. This shift in equilibrium is in accordance with Le Chatelier's principle, which states that a system at equilibrium will respond to a change in conditions in a way that counteracts the change and maintains equilibrium.

For more similar questions on topic Chemical equilibrium.

https://brainly.com/question/15835643

#SPJ11

The solutions of NaOH and HCl can simply be made with careful weighing of reagents because both of these substances are pure and have known chemical formulas.

However, they need to be standardized because the concentration of the solution may not be exactly what it is supposed to be due to measurement errors or impurities in the reagents.

Standardization is the process of determining the exact concentration of a solution by reacting it with a solution of known concentration. This is important because it allows for more accurate and precise measurements in experiments and chemical reactions.

For example, if you are trying to make a 0.1 M solution of NaOH, you would weigh out the appropriate amount of NaOH and dissolve it in water.

However, if there are impurities in the NaOH or if there was a measurement error, the actual concentration of the solution may be slightly different from 0.1 M.

By standardizing the solution with a solution of known concentration, you can determine the exact concentration and make any necessary adjustments. In conclusion, the solutions of NaOH and HCl can simply be made with careful weighing of reagents, but they need to be standardized to ensure accurate and precise measurements in experiments and chemical reactions.

Learn more about standardization at

https://brainly.com/question/25663758

#SPJ11

The compound Ammonium Phosphate is (NH4)3PO4 while that of sodium acetate is NaC2H3O2.

An ionic compound is  compound that is composed of ions. We know that a poly atomic ion is an ion that contains more than one atom.

Looking at the options that have been provided, we know that the correct formula for the compound Ammonium Phosphate is (NH4)3PO4 while that of sodium acetate is NaC2H3O2.

Learn more about ionic compound:https://brainly.com/question/9167977

#SPJ1

The characteristic of elemental bromine reacting vigorously with elemental sodium metal to form a white solid represents a chemical property.

Chemical characteristics define how substances react or change chemically. A white solid forms when elemental bromine and sodium metal combine, suggesting a chemical transition.

However, a substance's physical attributes can be detected or quantified without changing its chemical composition. Colour, density, melting, and boiling points are physical qualities.

It is a chemical property of elemental bromine to react with sodium metal and generate a new compound.

Learn more about chemical property, here:

https://brainly.com/question/1728902

#SPJ4

Density is the measurement of the amount of mass in a substance per unit volume. It is given by the formula, `

Density = Mass / Volume`.

The answer is (C) 42 hg/L.

How to get it:  density is the amount of mass in a substance per unit volume. It is given by the formula,

`Density = Mass / Volume`. If an object has a density of 4.2 g/mL,

Since 1 hg = 100 g and 1 L = 1000 mL,1 hg/L = 100 g/1000 mL = 0.1 g/mL.

So, to convert density from g/mL to hg/L, multiply by 0.1.

Therefore, the density of an object with a density of 4.2 g/mL in hg/L would be: 4.2 g/mL x 0.1 hg/g = 0.42 hg/L. Answer: `(C) 42 hg/L`.

To know more about Density visit:

https://brainly.com/question/29775886

#SPJ11

The molarity of the base used in the experiment, which was determined based on the recovered NaCl and the volumes of hydrochloric acid and sodium hydroxide, was approximately 1.15 M.

To determine the molarity of the base used in the experiment, we need to use the stoichiometry of the balanced chemical equation and the given data.

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is:

HCl + NaOH → NaCl + H2O

First, we need to find the number of moles of NaCl produced. We can do this by using the given mass of NaCl (2.22 g) and its molar mass (58.44 g/mol):

moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 2.22 g / 58.44 g/mol

moles of NaCl = 0.038 moles

Next, we can use the stoichiometry of the balanced equation to determine the number of moles of NaOH that reacted. Since the mole ratio between NaCl and NaOH is 1:1, the number of moles of NaOH is also 0.038 moles.

Now, we can calculate the molarity of the base (sodium hydroxide) using the given volume of sodium hydroxide solution (0.033 L):

Molarity of NaOH = moles of NaOH / volume of NaOH solution

Molarity of NaOH = 0.038 moles / 0.033 L

Molarity of NaOH ≈ 1.15 M

Therefore, the molarity of the base used in the experiment is approximately 1.15 M.

For more such question on experiment. visit :

https://brainly.com/question/20639065

#SPJ8

Answer:

Your answer will be: Physical

Explanation:

The proteins are the first to assemble in the organelle called the irregular endoplasmic reticulum and then the proteins are transported by an organelle known as the Golgi bodies.

Protein cargo moves from the ER to the Golgi is modified within the Golgi and is sent to various destinations in the cell, including the lysosomes and the cell surface. The Golgi procedure proteins are made by the endoplasmic reticulum (ER) before getting off them to the cell. All channel proteins and carrier proteins allow solutes to cross the membrane without the use of energy is called passive transport, or facilitated diffusion. These proteins, and specific genes within its DNA must first be transcribed into molecules of mRNA; then, these transcripts must be translated into chains of amino acids, which later folded into fully functional proteins. The organelle that transports proteins is called the endoplasmic reticulum.

So we can conclude that the endoplasmic reticulum is responsible for the production of protein and transported by the Golgi bodies.

Learn more about  Proteins here:  https://brainly.com/question/884935

#SPJ1

Answer:

The physician William Murrell was one of the first physicians to recognize the the clinical benefits of nitroglycerin in the treatment of the heart disease known as angina pectoris, a type of chest pain caused by reduced blood flow to the heart.

Explanation:

The physician William Murrell was one of the first physicians to recognize the the clinical benefits of nitroglycerin in the treatment of the heart disease known as angina pectoris, a type of chest pain caused by reduced blood flow to the heart. He also used nitroglycerin to treat and reduce high blood pressure. He used small diluted doses of nitroglycerin to treat patients with angina pectoris. Murrell published his treatment results in the article "Nitro-glycerine as a remedy for angina pectoris," in the journal The Lancet in 1879. Thereafter, the use of nitroglycerin as treatment procedure for angina pectoris soon became generally adopted by other physicians.

Nitroglycerin is a vasodilator which is a medicine that opens blood vessels in order to improve blood flow. Nitroglycerine acts to improve blood flow to the heart by opening up or dilating the coronary arteries in the heart, thereby reducing how hard the heart has to work in pumping blood round the body. It reduces preload by  dilating veins and reduces afterload moderately by dilating arteries.

Nitroglycerin comes in two forms: quick-acting forms and long-acting forms.

The quick-acting forms include tablets or oral sprays.

Long-acting forms include pills, tablets, skin ointment, and skin patches.

Mass of KNO₃ : = 40.643 g

Given

28.5 g of K₃PO₄

Required

Mass of KNO₃

Solution

Reaction(Balanced equation) :

2K₃PO₄ + 3 Ca(NO₃)₂ = Ca₃(PO₄)₂ + 6 KNO₃

mol K₃PO₄(MW=212,27 g/mol) :

= mass : MW

= 28.5 : 212,27 g/mol

= 0.134

Mol ratio of K₃PO₄ : KNO₃ = 2 : 6, so mol KNO₃ :

= 6/2 x mol K₃PO₄

= 6/2 x 0.134

= 0.402

Mass of KNO₃ :

= mol x MW KNO₃

= 0.402 x 101,1032 g/mol

= 40.643 g

Answer:

The movement of the electron changes the amplitude of the wave. The farther the electron moves from the center position, the greater the amplitude.

Explanation:

Answer:

The movement of the electron changes the amplitude of the wave. The farther the electron moves from the center position, the greater the amplitude.

Explanation:

Edmentum Sample Answer.

Answer:

C

Explanation:

Runoff occurs when there is more water than land can absorb so  it would be C.

Answer:

A

Explanation:

The sun heats up earths surface

Explanation:

The reaction between magnesium ribbon and dilute hydrochloric acid is a classic example of a single replacement reaction, which can be represented by the following chemical equation:

Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

In this reaction, magnesium (Mg) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2).

The rate of this reaction can be altered by changing the concentration of the hydrochloric acid. This is because the rate of a chemical reaction depends on the concentration of the reactants. Specifically, the rate of the reaction is proportional to the concentration of the reactants raised to some power, which is determined by the reaction's rate law.

In this reaction, the rate law can be expressed as:

Rate = k [Mg] [HCl]^x

Where k is the rate constant and x is the order of the reaction with respect to hydrochloric acid. The order of the reaction with respect to magnesium is one, since the concentration of magnesium does not change during the reaction.

When the concentration of hydrochloric acid is increased, the rate of the reaction increases because there are more hydrochloric acid molecules available to collide with magnesium atoms and react. This means that the value of x is greater than zero and the reaction is dependent on the concentration of hydrochloric acid.

Conversely, when the concentration of hydrochloric acid is decreased, the rate of the reaction decreases because there are fewer hydrochloric acid molecules available to react with magnesium. This means that the value of x is less than one and the reaction is not entirely dependent on the concentration of hydrochloric acid.

The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration

To learn more about electron configuration, refer to:

https://brainly.com/question/26084288

#SPJ4

If the sample is compressed to a volume of 11.4L, the pressure is  1.147 atm.

"Pressure" is defined as the thrust (force) applied to a surface per area. The ratio of force to area is another way to describe it (over which the force is acting).

Formula and Pressure's Unit:

Thrust/Area = Pressure (P)

Pascals (Pa) is the SI unit. 1 Pa = 1N/m2

For instance, it is simpler to hammer a sharp pin than dull pin. This is due to the fact that sharp pin's end has a lower surface area than blunt pin. This causes the pressure to rise.

Types of Pressure:

Calculation:

We can find \(P_{2}\) by using the formula for Boyle's law:

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

Since we are finding another pressure:

\(P_{2} = \frac{P_{1}V_{1}}{V_{2}}\)

From the question we get:

\(P_{2} = \frac{(1.03)(12.7 ) }{11.4 }\)

\(P_{2} = 1.147\)

Therefore the pressure is 1.147 atm.

To learn ore about pressure visit:

https://brainly.com/question/18915714

#SPJ4

Answer:

The larger the atom, the lesser the tendency for the atom to withhold its valence electrons.

Explanation:

The size of an atom is usually estimated in terms of its atomic radius. Across the period in the periodic table, the atomic radius decreases progressively from left to right. This is due to the progressive increase in the nuclear charge (i.e., the number of protons in the nucleus) without an attendant increase in the number of electronic shells.

Similarly, down the group, the atomic radius increases progressively from top to bottom due to the successive number of electrons' shells.

Thus, the larger the atom's radius, the smaller the Ionization energy because of the increasing shielding effect of inner shell electrons on the electron to be removed from the nuclear attraction.

Finally, we can conclude that as the atom becomes larger, the tendency to withhold the electrons on the outer shell decreases due to distance and the shielding/ screening effect.

Answer:

800.3 Kelvin

Explanation:

127°C = 400.15 Kelvin   (because 127 + 273.15)

Charles Law:

\(\frac{V1}{T1} = \frac{V2}{T2}\)   Thus, \(\frac{10.0 L}{400.15 K} = \frac{20.0 L}{T2}\)

Then, work out the math algebraically.  

T2 = 20.0 / (10.0/400.15)

= 20.0 / 0.02499...

= 800.3 Kelvin

This is assuming the pressure remains constant.

A property of matter than can observed without changing its composition or makeup is called Physical Property.

Physical features of a substance are those that can be seen or quantified without altering the substance's makeup or identity. Physical characteristics include things like colour, texture, density, melting and boiling points, and conductivity. These characteristics can be used to recognise a substance and set it apart from other substances. Physical characteristics can be qualitative or quantitative and can be applied to both solids and fluids. Understanding physical attributes is crucial in a variety of disciplines, such as chemistry, physics, and materials science, as it enables the identification and classification of materials according to their observable qualities. The behaviour of a substance can also be predicted using a substance's physical qualities when subjected to various situations like temperature, pressure, or electric fields.

Learn more about Physical here:

https://brainly.com/question/28600368

#SPJ4

Answer:

C

Explanation:

Mass of magnesium (Mg) = 0.12 g

Atomic mass of Mg = 24.31 g/mol (from periodic table)

Number of moles of Mg = Mass of Mg / Atomic mass of Mg

= 0.12 g / 24.31 g/mol

= 0.00494 mol

Number of moles of O₂ = Number of moles of MgO produced / 2

= 0.00650 mol / 2

= 0.00325 mol

When the experiment is performed without the crucible cover, the magnesium oxide created reacts with any oxygen in the air. When more oxygen reacts with the magnesium, the amount of magnesium oxide generated will be larger than when the experiment was run without a cover on the crucible.

Also, any water vapour or other gases in the air may react with the magnesium oxide, influencing the final product's mass. As a result of the existence of extra reactants in the air, the mass of magnesium oxide formed will change when the crucible is not covered.

Learn more about number of moles

brainly.com/question/13314627

#SPJ1