PLS HELP ME WITH MY CHEMISTRY

When this occurs the result that is obtained from the calculation would no longer be trustworthy because it is above the actual value.

We know that evaporation involves the heating a sample of a substance until all the water in it leaves and it remains only the crystalline solid. The whole water would evaporate and the mass of the sample would decrease.

When the student accidentally drops the watch glass atop the evaporating dish containing the dried salt and it breaks, the particles of the glass would mix with the dried salt and increase the mass of the dried salt.

When this occurs the result that is obtained from the calculation would no longer be trustworthy because it is above the actual value.

Learn more about evaporation:https://brainly.com/question/12306949

#SPJ1

AgNo3 is a polymorph as it can be many forms.

A substance's capacity to crystallize into various crystalline forms is known as polymorphism. These crystal modifications are also referred to as polymorphs. Polymorphs behave differently in the solid state even though they are the same in the liquid or gaseous states.

The ability of some chemical elements to exist in two or more different forms, in the same physical state, is known as allotropy or allotropism. These forms are referred to as the element's allotropes. Allotropes are different structural modifications of an element in which the bonding between the atoms is altered.

To know more about crystalline :

https://brainly.com/question/28274778

#SPJ9

Answer:

see bellow..

Explanation:

a) independent variable ; the specific scents being used (like vanilla, or blueberry etc.)

b) how much of it is sprayed

c) the weather,  brand of perfume, record time

The correct answer is  a sphybridisation in z coordinate.So to form sphybridisation we need a s orbital and a p orbital  .

In genomics, hybridization is the process by which two complementary single-stranded DNA or RNA molecules bond together to form a double-stranded molecule.The bonding is determined by the correct base pairing between the two single-stranded molecules. When one s and one p orbital in the same main shell of an atom combine to form two new equivalent orbitals, this is referred to as sphybridization.

The newly formed orbitals are known as sphybridized orbitals. It forms linear molecules with a 180° angle. Atomic orbitals include both s and p orbitals. These orbitals represent the most likely region in which we can find an electron of that atom. The primary distinction between s and p orbitals is that s orbitals are spherical in shape, whereas p orbitals are dumvell-shaped.So to form  sp hybridisation we need a s orbital and a  p orbital .

Learn more about hybridisation  here :-

https://brainly.com/question/14140731

#SPJ9

Explanation:

make up some of your own signs which can warns people about the dangers of river an ocean a large snake hiding in the bush

Answer: The same answer

Explanation: I believe atomic mass should remain the same regardless of the amount of substance you have. Carbon for example has an atomic mass of 12. Regardless of if you have 1 mole or 120 moles of Carbon, it is still a mass of 12.

The true statement about a molecule is that all molecules of a compound have the same properties and is therefore denoted as option C.

This is referred to as the smallest unit of matter without the release of electrically charged particles which include proton, electron etc.

Atoms combine together to form molecules and they are involved in the formation of chemical compounds such as NaCl etc. It consists of identical molecules which means that all of them have the same properties which is therefore the reason why option C was chosen as the most appropriate choice.

Read more about Atom here https://brainly.com/question/6258301

#SPJ1

Answer:

All molecules of a compound have the same properties.

Explanation:

Explanation:

though the statements were not given let just give you a brief review of normative system.

A normative statement explains what should be base of the subject according to the belief through valued judgement that describes the fairness of the subject on public policy. Therefore, the unemployment rate should be lowered is a valued judgement based on the belief that it will bring economic welfare.

Normative systems, i.e., sets of norms, have two main. tions: a) to evaluate human actions, and b) to guide peop. The guidance and the evaluation based on a normativ. be good or bad.In social psychology three different normative behaviours have been identified: obedience, conformity and compliance.In the context of a normative system like law (or religion or morality), every statement of what one ought to do (or ought not to do) requires justification from a more general or basic statement. Such statements lead upward through the normative hierarchy until one reaches a foundational normative premise.

please rate brainliest if helps and follow

Dimensions of a table and recorded the length as 103.50 cm and the width

as 73.75 cm

AREA = L × B

AREA = 103.50 × 73.75

area = 7,633.125 cm²

but the student should report 7633 cm² because the width measurement (73.75 cm) has 4 significant figures while the length measurement (103.50 cm) has 5 significant figures and when multiplying the answer should have the same number of significant figures as the number with the least number of sig figs.

so the correct answer should be 7633 cm².

To know more about significant figures visit :

https://brainly.com/question/14359464

#SPJ9

According to postulates of the Dalton's atomic theory, atoms of same element are identical in all respects i.e., in shape, size, mass and chemical properties. However, after the discovery of isotopes, it was modified as : atoms of same element may not be similar in all respects

The mass of H₂s present in 2.00 L of natural gas at 298 K is 0.002156 g.

The volume hydrogen sulfide in 2.00 L of natural gas at 298 K is calculated as follows:

Volume of hydrogen sulfide = percent composition * volume of natural gas

Volume of hydrogen sulfide = 0.07/100 * 2.00 L

Volume of hydrogen sulfide = 0.014 L

The given temperature is standard temperature.

Density of H₂s at STP is equal to 1.54 g/L.

mass of H₂s = density * volume

mass of H₂s = 0.0014 * 1.54

mass of H₂s = 0.002156 g

Learn kore about mass and density at: https://brainly.com/question/1354972

#SPJ1

When a neutral molecule is exposed to a solution, it splits into charged ions, which is known as ionization. The degree of ionization of acids and bases is determined by the degree of dissociation of compounds into their constituent ions. Strong acids and bases have a higher degree of ionization than weak acids and bases.

The Ionisation degree denotes the strength of an acid or a base. A strong acid is said to completely ionize in water, whereas a weak acid is said to ionize only partially. Because there are different degrees of acid ionization, there are also different levels of weakness, which can be expressed quantitatively.

Ionization of these bases results in the formation of hydroxyl ions (OH). As a result, the degree of ionization of acids and bases is determined by the degree of dissociation of compounds into their constituent ions. Strong acids and bases have a high degree of ionization when compared to weak acids and bases.

Learn more about Ionization here:-

https://brainly.com/question/5880605

#SPJ9

To know more about  electromagnetic spectrum visit : https://brainly.com/question/18704022

#SPJ9

The volume of the sapphire, given the data from the question is 1.3 mL

From the question given above the following data were obtained:

The volume of the sapphire can be obtained by using the displacement method as follow:

Volume of sapphire = (Volume of water + sapphire) - (Volume of water)

Volume of sapphire = 6.2 - 4.9

Volume of sapphire = 1.3 mL

Thus, the volume of sapphire is 1.3 mL

Learm more about volume of irregular shape:

https://brainly.com/question/27911332

#SPJ1

Explanation:

taking atom as hydrogen than

answer is +2.55

just apply Delta energy=energy in 4th orbit -energy in 2nd orbit

[tex]energy = - 13.6 \times z ^{2} \div n {}^{2} [/tex]

so here you can find answer

Answer: C. Biochemistry

Explanation:

Merriam-Webster Dictionary defines Biochemistry as:

"chemistry that deals with the chemical compounds and processes occurring in organisms"

“Definition of BIOCHEMISTRY.” Merriam-Webster.com, 2018,   www.merriam-webster.com/dictionary/biochemistry.

The arrows B, C, and E represent the process of cooling.

Solid state: In the solid state, the molecules are arranged in a regular and fixed pattern. The molecules in a solid are closely packed that is the solid particles can not move.

Liquid state: In the liquid state, the molecules are present in an irregular pattern. The molecules are closely packed but particles can move.

Gaseous state: In the gaseous state, the molecules are present in an irregular manner. The molecules of gases are not closely packed and can move freely.

Therefore, the solid changes to liquid on heating, and the liquid changes to solid after cooling.

Liquid changes to a gaseous state on heating while gases changes to liquid on cooling.

Solid changes to gas on heating and gases change to solid after cooling.

To learn more about the process of cooling, visit: https://brainly.com/question/4385546

#SPJ9

Answer:

88.63494750000001

Explanation:

Convert moles Gold to gram.

Answer:

you can do it shshbssjjsjsnsjssbsjsb

All processes for which the temperature stays constant are described by Boyle's law.

Boyle's law is expressed as p1 * V1 = p2 * V2, where p1 and V1 are starting pressure and volume, respectively. The ultimate values of these gas parameters are p2 and V2.

Boyle's law formula can be stated in a variety of ways, depending on the parameter we want to estimate. Let's imagine we wish to determine the pressure that results from changing a gas' volume under isothermal conditions. The Boyle's law equation thus reads: p2 = p1 * V1 / V2 or p2 / p1 = V1 / V2.

As we can see, the final-to-initial pressure ratio is the opposite of the volume ratio.

Learn more about Boyle's law here-

https://brainly.com/question/1437490

#SPJ9

The energy of an electromagnetic wave that has a wavelength of 4.2nm is 4.731 × 10-¹⁷ J.

The energy of a wave can be calculated using the following formula:

E = hf

Where;

However, the frequency must be calculated first as follows:

λ = v / f

Where;

4.2 × 10-⁹ = 3 × 10⁸/f

f = 7.14 × 10¹⁶Hz

Energy = 6.626 × 10-³⁴ × 7.14 × 10¹⁶

Energy of the wave = 4.731 × 10-¹⁷ J

Therefore, the energy of an electromagnetic wave that has a wavelength of 4.2nm is 4.731 × 10-¹⁷ J.

Learn more about energy at: https://brainly.com/question/9624826

#SPJ1

The mass (in grams) of 10.00 L of propane vapor ([tex]C_3H_8[/tex]) at STP is 19.668 g

One mole of gas requires 22.4 L of space at STP.

Moles of[tex]C_3H_8[/tex] = 10.0L/22.4L = 0.446 mol

Mass of [tex]C_3H_8[/tex] = 0.446×44.1 = 19.668 g

To learn more about STP visit:

brainly.com/question/15469566

#SPJ9

There are 4 orbitals in the principal energy level two. These are: one 2s orbitals and three 2p orbitals (2px, 2py and 2pz).

Principal energy level indicates the energy shell outside the nucleus in which an electron is located. There are 4 principal energy levels. These are:  s (sharp), p (principal), d (diffuse) and f (fundamental). The principal energy level can be denoted by the letter n.

Orbital is a function. It describes the behavior and the location of an electron in an atom. The orbitals for any energy level are calculated using the formula n² (where n is the number of orbitals). Hence for energy level 2, the number if orbitals = 2² = 4. Now s has only one orbitals and p has three, therefore a total of four orbitals.

To know more about principal energy level, here

brainly.com/question/5718835

#SPJ1

From the stoichiometry of the reaction, 0.094 g  of [tex]Cu^{2+}[/tex] is contained in the reaction.

The reaction equation is given by; [tex]2Na_{3}PO_{4} (aq) + 3CuCl_{2} (aq) ----- > 6NaCl (aq) + Cu_{3}(PO_{4}) _{2} (s)[/tex]. We must note that the balanced reaction equation is the entry way into obtaining the correct stoichiometry of the reaction in order to solve the problem.

Number of moles of [tex]Na_{3}PO_{4}[/tex] =  5.00 × 10−2 L *  0.173 mol L−1 = 0.00865 moles

If 2 moles of [tex]Na_{3}PO_{4}[/tex] produces 1 mole of[tex]Cu_{3}(PO_{4}) _{2}[/tex]

0.00865 moles of [tex]Na_{3}PO_{4}[/tex] produces  0.00865 moles * 1 mole/2 moles

= 0.0043 moles of [tex]Cu3(PO4)2[/tex]

Number of moles of [tex]Cu^{2+}[/tex] = 0.0043 moles/3 = 0.00144 moles

Mass of [tex]Cu^{2+}[/tex] = 0.00144 moles * 63.5 g/mol = 0.094 g

Learn more about stoichiometry:https://brainly.com/question/9743981

#SPJ1

Answer:

ddddxddddddddddddddddddddddddd

An atomic mass unit is defined as 1/12 th of the mass of carbon-12 atom.

The mass of an atom is mainly due to its protons and neutrons in the nucleus.

Weight of a proton is 1.6 x 10^-27 kg

Weight of a neutron is 1.6 x 10^-27kg

However weight of an electron is 9 x 10^-31kg and hence is negligible in calculation of amu

A chlorine atom has 17 protons in its nucleus and 18 neutrons in its nucleus

Its atomic number is 17

Amu weight of Cl= weight of protons+ weight of neutrons

        =17+18

        =35amu

Hence the average atomic mass unit of chlorine atoms will be 35 amu

Disclaimer:

The value is taken for easier calculation and is not accurate upto 3 decimals

For further reference:

https://brainly.com/question/13668134?referrer=searchResults

#SPJ9

Sugar compound would make a saturated solution if 200 grams were dissolved in 100 grams of water at 90 degrees Celsius.

A saturated solution is a type of solution in which the maximum amount of solvent has been dissolved. In a saturated solution, no more solute can be dissolved at a given temperature because of no capacity. We can make an saturated solution by adding more solute until no more solute can be dissolved in the solvent. We can make a saturated solution if we added more amount of sugar in less amount of water.

So we can conclude that Sugar compound would make a saturated solution if 200 grams were dissolved in 100 grams of water at 90 degrees Celsius.

Learn more about saturated here: https://brainly.com/question/388072

#SPJ1

go play mine craft use code wild ............................