a solution with a ph of 11.7 is how many time more basic than a solution with a ph of 8.7

Answer:

Signs of chemical reactions may be:

Gas release

Formation of a precipitate

Change of color

Change of odor

Change of pH

Change of aspect

Change of viscosity

Change of the temperature

Visible formation of new compounds

Explanation:

The energy released in other chemical reactions The energy released by the fusion process is roughly 3–4 times more than the energy liberated by the fission process.

In a fusion reaction, two light nuclei merge to create a heavier nucleus. The process leads to the generation of energy because of the mass of the single nucleus that forms is less than the sum of the masses of the two original nuclei. Any leftover mass is transformed into energy.

A deuterium (2H) nucleus is created from two protons in the first step of the hydrogen fusion process, along with an antielectron and a neutrino. Four hydrogen protons and two electrons are used in the basic hydrogen fusion cycle, which results in the creation of a helium nucleus, two neutrinos, and six photons.

To know more about Fusion visit:

https://brainly.com/question/12701636

#SPJ9

Answer:

Evaporation

Explanation:

the process where a liquid (in this case water) is converted into a gas. Evaporation is a type of vaporization that occurs on the surface of liquid so it is a surface phenomenon

From the periodic table as well as the patterns and trends on the table, the correct option are:

Periodic trends in the periodic table refers to the variation in character which is observed in the periodic table as one moves across the periodic table from left to right across a period or down a group in the periodic table.

The periodic trend observed is that reactivity of metals increase down a group and from right to left across a period.

For non-metals,  reactivity of non-metals increase from down to top in a group and from left to right across a period across a period.

Considering the given questions;

1. From the periodic table as well as the patterns and trends on the table, the best conductor of electricity is Titanium since it is the only metal in the list.

2. The most reactive element is oxygen because it is a non-metal found to the top-left of the periodic table.

3. The elements that has the highest electronegativity is oxygen because it is a non-metal found to the top-left of the periodic table.

Learn more about periodic trends at: https://brainly.com/question/28161428

#SPJ1

2 moles of CaSO4 are required to produce 128 g of SO2 in 3CaSO4 + CaS → 4CaO + 4SO2 in this equation.

The term mole is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

1 mole = 6.023 × 10²³ molecules

The balance equation is as follows:

3CaSO4 + CaS → 4CaO + 4SO2

1 mole = 6.023 × 10²³ molecules

1 mole SO₂ = 6.023 × 10²³ molecules

128 mole = ?

Molar mass of SO₂ = 64 gram

The numbers of moles in 128 gram SO₂ = 1 / 64 ×128

= 2 moles

Thus, 2  moles of CaSO4 are required to produce 128 g of SO2.

To learn more about the mole, follow the link;

https://brainly.com/question/26416088

#SPJ1

Psychology is useful in explaining current behavior and predicting future behavior.

Psychology is an empirical investigation of the intellect and conduct, encompassing a vast scope of subjects such as cognitive processes, affective states, volition, individual traits, and interpersonal dynamics.

Psychologists employ a diverse array of approaches to examine behavior, including careful observation, in-depth interviews, comprehensive surveys, and controlled experiments.

By discerning the underlying determinants, psychology serves as a tool to elucidate present conduct. These determinants may involve biological, psychological, and sociocultural influences.

Learn about psychology here https://brainly.com/question/12011520

#SPJ1

Approximately 8.24 mL of the standard EDTA solution is needed to reach the endpoint of the titration when using 20 mL of 0.07 M calcium solution.

EDTA (ethylenediaminetetraacetic acid) is a chelating agent that can bind to metal ions, including calcium, magnesium, iron, and zinc. It is a colorless, water-soluble solid that is commonly used in chemistry, biochemistry, and medicine for various purposes. EDTA forms strong complexes with metal ions, making it useful for a variety of applications, such as:

Chelation therapy: EDTA can be used to treat heavy metal poisoning by binding to and removing excess metals from the body.

Titration: EDTA can be used to measure the concentration of metal ions in a solution by adding a known amount of EDTA and using an indicator to detect when all the metal ions have been bound.

To calculate the volume of the standard EDTA solution needed to reach the endpoint of the titration, we need to use the following equation:

M1V1 = M2V2

where M1 is the molarity of the calcium solution, V1 is the volume of the calcium solution used (in this case, 20 mL), M2 is the molarity of the EDTA solution, and V2 is the volume of the EDTA solution needed to reach the endpoint of the titration.

We know that the molarity of the calcium solution is 0.07 M, and we can assume that the concentration of the EDTA solution is around 0.17 M. We don't have a specific endpoint volume, so we'll leave V2 as a variable.

0.07 M x 20 mL = 0.17 M x V2

V2 = (0.07 M x 20 mL) / 0.17 M

V2 ≈ 8.24 mL

To know more about EDTA, visit:

https://brainly.com/question/26556460

#SPJ1

A full response is that the molecule with 32.1 g of S and 32 g of O has the empirical formula SO2.

Every compound's empirical formula is the simplest whole-number ratio of all of its atom types. It could occasionally be the same as the compound's molecular formula.

By first calculating the masses of each element contained in a compound, it is possible to experimentally ascertain the complex's empirical formula. Afterward, turning each element's mass into a corresponding mole.

To determine the empirical formula of the compound, we need to find the simplest whole-number ratio of the elements in the compound.

Moles of S = mass of S / molar mass of S

Moles of S = 32.1 g / 32.06 g/mol (molar mass of S)

Moles of S = 1.001 mol

Moles of O = mass of O / molar mass of O

Moles of O = 32 g / 15.99 g/mol (molar mass of O)

Moles of O = 2.001 mol

Moles of S in simplest ratio = 1.001 mol / 1.001 mol = 1

Moles of O in simplest ratio = 2.001 mol / 1.001 mol = 2

The empirical formula of the compound is SO2.

To know more about empirical formulas visit:

https://brainly.com/question/1603500

#SPJ1

There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

for such more questions on atoms

https://brainly.com/question/6258301

#SPJ8

The most effective poison is the poison that cost $30 per gallon.

i) Hypothesis : Most expensive poison is the most effective

ii) Experiment :

Plant 12 dandelions under similar conditions which are :

Divide the 12 Dandelions into four (4) different groups labelled ;

Apply the most expensive ( $30 ) poison to group A

Apply the second most expensive ( $20 ) poison to group B

Apply $10 poison to group C

Keep group D under natural conditions

iii) Result

The Dandelions grouped in Group A will die off faster than the plants grouped in other groups. which makes the poisons that cost $30 to be most effective.

Hence we can conclude that the most effective poison is the one that cost $30 per gallon.

Learn more about Dandelion : https://brainly.com/question/878684

Buffering capacity measures a solution's capability to withstand pH fluctuations by either absorbing as well as desorbing H+ as well as OH- ions.

Aqueous buffer solutions were made up of a weak acid as well as its conjugate base or even a weak base as well as its conjugate acid. The capability of buffer solutions to keep a fairly constant pH value in reaction to the addition of a tiny amount of acid or base is an important attribute.

A buffer would be a solution that avoids pH changes when a minuscule portion of strong acid as well as strong base is added. Technical definition (How does one come up with one?): A buffer was made up of a weak acid and its conjugate base.

Thus, the correct answer will be option (b).

To know more about solution's

https://brainly.com/question/1616939

#SPJ4

Answer:

As the thermal energy of matter increases, its particles usually spread out, causing the substance to expand.

Explanation:

i have a book about this stuff

As the thermal energy of matter increases, its particles usually spread out,

causing the substance to expand.

Thermal energy is the energy which is measured as a result of its heat

content. This is usually as a result of the increase in temperature of the

substance involved.

Increase in temperature leads to an increase in thermal energy. This leads

to the particles spreading out and the substance expanding as a result of

the atoms being loosely held together.

Read more about Thermal energy here https://brainly.com/question/19666326

Answer:

i think its D

Explanation:

In order to get maximum accuracy, student should take average of results from all four trials.

Accuracy  in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

Accuracy in case of instruments  is neglected up  to ±0.5 percent.Accuracy of measurements can be increased by taking multiple measurements and taking into account human errors.

Learn more about accuracy,here:

https://brainly.com/question/15276983

#SPJ2

When a chocolate bar is solid, it is able to smell it.  It is also important to note that a substance 's molecules cannot be in two distinct phases at the a time.

In general, it is not possible for a the molecules of the chocolate  to be in two distinct phases at the same time.

It must be noted that smelling a solid, such as a chocolate bar, however, mean  the release  of loose molecules from the solid,   which may then move   through the air and   reach our olfactory receptors in our nose, allowing us to sense the fragrance.

Learn more about phase transition:
https://brainly.com/question/29795670
#SPJ1

Answer:

hydrochloric acid

Explanation:

chemical compound any substance composed of identical molecules consisting of atoms

Valence electrons are the electrons in the outermost shell of an atom and are responsible for chemical reactions. In a chemical reaction, atoms gain or lose electrons to achieve a stable electron configuration, which is known as the octet rule. The number of valence electrons an atom has determines its chemical reactivity and how it will bond with other atoms. For example, atoms with only a few valence electrons, such as hydrogen, are highly reactive and will readily form chemical bonds, while atoms with many valence electrons, such as noble gases, are relatively unreactive and do not easily form chemical bonds.

Well How is a generator different from an electromagnet?

Generators are based on the connection between magnetism, motion and electricity. Generators typically use an electromagnet, which is created by electricity and a rapidly spinning turbine to produce massive amounts of current. The standard generator contains a group of insulated wire coils in the shape of a cylinder.

Answer:

"Generators are based on the connection between magnetism, motion and electricity. Generators typically use an electromagnet, which is created by electricity and a rapidly spinning turbine to produce massive amounts of current. ... When the magnet spins, it induces a tiny current in each part of the wire coil."

Explanation:

this is all copied from the internet just so you know

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.

Answer:

58.44277 gram

Explanation:

According to the given reaction, one molecule of H2 reacts with one molecule of C2H4 to produce one molecule of C2H6.

In the reactants, there are 7 molecules of C2H4 and 3 molecules of H2, it means that 3 molecules of C2H4 react with the 3 molecules of H2 to form 3 molecules of C2H6, and 4 molecules of C2H4 will remain.

It means that you have to add 3 molecules of C2H6 and 4 molecules of C2H4.

Answer:

Calcium is the 20th element, with 20 protons. Since a stable atom has a net charge of 0, we must have 20 electrons. The number of neutrons will be the same as the number of protons, or else we will have an isotope, in this case, it is also 20.

Explanation:

Answer:

Salt Method of Preparation

(i) Sodium nitrate (b) Neutralisation

(ii) Iron (III) chloride (e) Direct synthesis

(iii) Lead chloride (d) Double decomposition

(iv) Zinc sulphate (a) Simple displacement

(v) Sodium hydrogen sulphate (c) Decomposition by acid

Explanation:

In the above case, there are 0.103 moles of argon gas as well as 4.12 grams of argon within the holder.

At STP (standard temperature and pressure), 1 mole of any gas involves 22.4 L. Also, the number of moles of argon gas in 2.3 L at STP can be calculated as:

n = V/ V_m

n = 2.3 L / 22.4 L/mol

n = 0.103 moles

To know the mass of argon, we need to make use of its molar mass. Note that the molar mass of argon is said to be 39.95 g/mol. Also , the mass of argon:

m = n × M

m = 0.103 moles × 39.95 g/mol

m = 4.12 g

So, 0.103 moles of argon gas as well as 4.12 grams of argon inside the holder.

Learn more about STP from

https://brainly.com/question/2783971

#SPJ1

Answer:

The lithosphere is the brittle crust and uppermost mantle. The asthenosphere is a solid but it can flow, like toothpaste. The lithosphere rests on the asthenosphere

Explanation:

Answer:

pretty sure its B

Explanation:

might not be tho but pretty sure it is

Answer:

0.0238 moles NaOH

Explanation:

To find the amount of moles, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (using the molarity equation)

It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs.

 125.0 mL NaOH                  1 L
---------------------------  x  ---------------------  =  0.1250 L NaOH
                                         1,000 mL

Molarity = moles / volume (L)                    <----- Molarity equation

0.190 M = moles / 0.1250 L                       <----- Insert values

0.0238 = moles                                         <----- Multiply both sides by 0.1250

Answer: Mesopotamia

Civilizations first appeared in Mesopotamia (what is now Iraq) and later in Egypt. Civilizations thrived in the Indus Valley by about 2500 B.C.E., in China by about 1500 B.C.E., and in Central America (what is now Mexico) by about 1200 B.C.E. Civilizations ultimately developed on every continent except Antarctica.

Hope this helps!