Which one of these is not a characteristic of electromagnetic waves.

amplitude

wavelength

frequency

intensity

The majority of laboratory equipment is constructed of glass, since it is an easy-to-clean material and allows for good vision. The majority of the chemicals used in studies don't react with it.

The fact that glass equipment is transparent, which enables researchers to easily monitor the chemical reactions and physical changes occurring within, is one of its main advantages.

This is especially crucial in investigations when the reaction's color or appearance is crucial to comprehending the underlying chemistry. The majority of the chemicals used in studies don't react with it.

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Answer: ok lets battle XD

Explanation:

Answer:

hmmmmm

Explanation:

seems kinda sus

Answer: covalent bonding

Explanation: atoms that carries a net charge due to the fact that the total number of electrons in the molecule is not equal to the total number of protons in the molecule.

I hope this is what you're looking for, have a great day!

The number of atoms :

C = 6 x 5 x 10²¹ = 3 x 10²²

H = 12 x 5 x 10²¹ = 6 x 10²²

O =  6 x 5 x 10²¹ = 3 x 10²²

Given

1.5 g glucose(C₆H₁₂O₆)

Required

The number of atoms

Solution

mol of glucose(MW=6.12+12.1+6.16=180 g/mol) :

mol = mass : MW

mol = 1.5 : 180

mol = 0.0083

Number of molecules = 0.0083 x 6.02 x 10²³ = 5 x 10²¹

There are 6 C, 12 H and 6 O, so number or atoms :

C = 6 x 5 x 10²¹ = 3 x 10²²

H = 12 x 5 x 10²¹ = 6 x 10²²

O =  6 x 5 x 10²¹ = 3 x 10²²

The isotopes of bromine from the options would be Z = 35,  A = 79.

Isotopes are atoms of the same element with the same atomic number but different neutron numbers.

The atomic number of an atom is the number of protons present in the nucleus of the atom. Since elements are arranged according to their atomic number on the periodic table, isotopes of the same element will occupy the same position on the periodic table.

Now, considering the isotope of bromine (Br). The atomic number is 35. The atomic number is denoted as Z on the periodic table. The normal bromine atom has a mass number of 80. With 35 as the number of protons, the number of neutrons can be calculated as:

80 - 35 = 45.

Considering an atom with Z = 35, A = 79, means the atomic number is 35, which means it is a bromine atom. The mass number is 79 instead of 80.

79 - 35 = 44.

This means that the atom has 44 as the neutron number instead of 45. Thus, Z = 35, A = 79 is the only isotope of bromine.

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The measure of the length of events and the duration of intervals between events is time.

The duration of events or the gaps between them can be measured, compared, or even ordered using time. The lengthy period of time that the Earth's geologic history takes up is known as geologic time. Starting at the beginning of the Archean Eon  formal geologic time runs until the present. Geology is defined as the "Science of the Earth."

Geology is the fundamental Earth science that examines how the earth created, its structure and composition, and the various forces acting on it. It is sometimes known as geoscience or earth science.

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Answer:

0, 0, 0, +1, 0

Explanation:

Because the compound has a +1 charge overall, the sum of the formal charges must equal +1.  The correct answer is the Lewis structure with as many atoms as possible having the formal charge of 0 with just a single atoms having the +1 formal charge.

Answer:

Security

Explanation:

A wireless network consists of good connection with fast speed, convenience, and reliability. Security is a major problem with wireless connection as someone can get your information by joining the same connection as you.

i) Entropy change for the surroundings when 2.13 moles of Fe(s) react at standard conditions is 52.89 K/J.

According to Hess law, “at constant temperature, heat energy changes (enthalpy – ΔHrec) accompanying a chemical reaction will remain constant, irrespective of the way the reactants react to form product”.

Heat of reaction = sum of heats of reaction of products - sum of heats of reaction of reactants or

ΔH0rxn = ∑n×ΔHf0(products)−∑n×ΔHf0(reactants)

= ΔHf0 FeCl2(s) + ΔHf0 H2(g) - (ΔHf0 Fe(s) + 2 *ΔHf0 HCl(aq))

= (-341.8 KJ + 0 KJ)-(2*-167.2 KJ+1*0 KJ)

= -7.4 KJ

the enthalpy change when 2.13 moles of Fe(s) react at standard conditions = 2.13(-7.4) KJ = -15.762 KJ

ΔS°surroundings = -ΔH0rxn /T

= -(-15.762 KJ)/298 K

= 52.89 J/K

ii) Entropy change for the surroundings when 2.23 moles of C2H4(g) react at standard conditions is 341.2 J/K.

According to Hess law,

ΔH0rxn = ∑n×ΔHf0(products)−∑n×ΔHf0(reactants)

= ΔHf0 CH3CH2OH(g) - (ΔHf0 C2H4(g) + ΔHf0 H2O(g)))

= (-235.1 KJ)-(52.3 KJ+(-241.8 KJ)

= -45.6 KJ

the enthalpy change when 2.23 moles of C2H4(g) react at standard conditions = 2.23(-45.6) KJ = -101.688 KJ

ΔS°surroundings = -ΔH0rxn /T

= -(-101.688 KJ)/298 K

= 341.2 J/K

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Answer:

I think 10

Explanation:

The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Answer: D. Intensity

Explanation: Intensity is correct, because if you originally were working on a treadmill with a speed of 8, that is how much intensity your putting your body on. And if you put the speed for a treadmill at 11 to increase your exercise, you are increasing the speed you have to run, making it more intense. The more intense you make your workout or training, the more stressful exercise you are doing.

Hope this helps,

:)

Answer:

The three pKa values for phosphoric acid (H3PO4) are 2.12, 7.21, and 12.32.

Answer:

a): The name of the product nuclide is lead-214

b): The symbol of the product nuclide is Pb-218

Explanation:

There are three types of decay processes:

Alpha decay is the decay process that happens when a heavy nucleus decays into a light nucleus with the release of an alpha particle. This alpha particle carries a charge of +2 units and has a mass of 4 units. It is also known as the helium nucleus. The general equation for this decay process is:

\(_Z^A\textrm{X} → _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha\)

The nuclear equation for the alpha decay of Po-218 follows:

\(_{84}^{218}\textrm{Po}\rightarrow _{82}^{214}\textrm{Pb}+_2^4\alpha\)

Hence, the name of the product nuclide is lead-214 and the symbol is Pb-218.

Answer: The number of series in Mendeleev's Periodic table is 12.

Explanation:

Horizontal rows present in the periodic table are called periods. Vertical rows in the periodic table are called series.

Mendeleev gave periodic table in the year 1869 by arranging elements according to their atomic weights a in tabular form.  

Mendeleev's periodic table depicts 12 periods/series.

Thus, we can conclude that the number of periods/series in Mendeleev's Periodic table is 12.

Answer:

Your answer will be 342 gmol.

Explanation:

Correct me if I'm wrong. Have a good day :)

Answer: B. Ketone

Explanation: Another name for acetone is propanone, and it is the main ketone as it has the functional group in the middle, a CH3 on each side. Ketones have the C=O functional group.

Acids: \(\text{H}_{2}\text{PO}_{4}^{\text{ }-}\) and \(\text{H}_{2}\text{BO}_{3}^{\text{ } -}\)

Bases: \(\text{HBO}_{3}^{\text{ } 2-}\) and \(\text{HPO}_{4}^{\text{ } 2-}\)

The formula for lithium hydrogen phosphate is Li2HPO4.

What is lithium hydrogen phosphate (Li2HPO4)?

Lithium hydrogen phosphate (Li2HPO4) is a chemical compound that contains the elements lithium, hydrogen, phosphorus, and oxygen. It is an ionic compound and a salt of phosphoric acid.

Lithium hydrogen phosphate is commonly used in the production of lithium-ion batteries and as a source of lithium ions in chemical reactions. It is also used in the synthesis of various other lithium compounds. In addition, lithium hydrogen phosphate has potential applications in the field of biomedical engineering as a material for bone tissue engineering and drug delivery.

What is an ionic compound?

An ionic compound is a type of chemical compound formed by the combination of positively charged ions (called cations) and negatively charged ions (called anions) through electrostatic attraction. The cations and anions are held together by ionic bonds, which are formed by the transfer of electrons from the cation to the anion. Ionic compounds are typically solids at room temperature and have high melting and boiling points. Examples of ionic compounds include sodium chloride (NaCl), magnesium oxide (MgO), and calcium carbonate (CaCO3).

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Answer:

yes it does

Explanation:because you are predicting the weather so your making a prediction which is what weather is all about

Answer:

I believe it does not. (Read explanation) ((and I know I’m answering like super late ))

Explanation:

Climate is mainly longer periods of time, and with temperature, humidity, etc. this is the average temperature of a whole summer which is more than 30 days. Please tell me if this was right or wrong. :-)

With a 27.7 mL sample of a 0.400 M aqueous hypochlorous acid solution  titrated with a 0.335 M aqueous potassium hydroxide solution, the pH value is mathematically given as

pH=12.90

Moles of HClO=0.329*21.5

Moles of HClO=7.0735

and

Moles of KOH=0.456*23.3

Moles of KOH=10.6248

Hence

The net mole of KOH=10.6248-7.0735

The  net mole of KOH=3.5513

Volume of solution=21.5+23.3

Volume of solution=44.8ml

Generally, the equation for the  Concentration of KOH is mathematically given as

CKOH=mole/volume

Therefore

CKOH=3.5513/44.8ml

CKOH=0.07927M

In conclusion,

pOH=-log{OH-}

pOH=-log{0.07927}

pOH=1.10

pH=14-110

pH=12.90

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Answer:

Trigonal Pyramidal

Explanation:

Here, we want to get the molecular geometry of ammonia

To get this, we have to look at the placement of the hydrogen atoms around the central nitrogen

Although there are 4 electron pairs and it is expected that ammonia is tetrahedral, the shape we have is a trigonal pyramidal shape because of the lone pair of electron

Answer:

Explanation:

The Reaction Rate for a given chemical reaction is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time. Let's see the following reaction:

The rate can be measured in terms of either reactant (A or B) or either product (C or D), like this:

The problem is asking for the rate of the reaction in terms of the change of nitrogen dioxide (NO2) concentration, so we can apply the formula of rate.

As NO2 are in the reactants, the rate is negative because it is consuming and the coefficient which is 14 is in the denominator:

The answer would be that the rate of NO2 concentration in the reaction is -1/14*(Δ[NO2])/Δt).

We need 147.5 ml of 10% CuSO4 solution and 33.6 ml of 20% NaOH solution to obtain 10 g of Cu(OH)2.

To obtain 10 g of Cu(OH)2, we need to start by writing the balanced chemical equation for the reaction between copper sulphate (CuSO4) and sodium hydroxide (NaOH):

CuSO4 + 2NaOH -> Cu(OH)2 + Na2SO4

From the balanced equation, we can see that one mole of CuSO4 reacts with two moles of NaOH to produce one mole of Cu(OH)2 and one mole of Na2SO4.

The molar mass of Cu(OH)2 is 97.56 g/mol. Therefore, we need 10 g / 97.56 g/mol = 0.1024 mol of Cu(OH)2.

To determine how much CuSO4 solution and NaOH solution we need, we can use the following equations:

Amount of CuSO4 required = 0.1024 mol x (159.61 g/mol) / 0.1 = 163.38 g

Amount of NaOH required = 0.2048 mol x (40.00 g/mol) / 0.2 = 40.96 g

Where the first equation is using the molar mass of CuSO4 and the density of the solution to determine the required volume. The same idea is used in the second equation but with NaOH.

Using the density of the solutions, we can convert the required mass to volume:

Volume of CuSO4 solution = 163.38 g / 1.107 g/ml = 147.5 ml

Volume of NaOH solution = 40.96 g / 1.219 g/ml = 33.6 ml

Therefore, we need 147.5 ml of 10% CuSO4 solution and 33.6 ml of 20% NaOH solution to obtain 10 g of Cu(OH)2.

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The balanced equation for the reaction of acetylene (C₂H₂) and oxygen (O₂) is; 2 C₂H₂(g) + 5 O₂(g) → 4 CO₂(g) + 2 H₂O(g) + heat

The coefficients in the balanced equation represent the stoichiometric ratio of the reactants and products in the chemical reaction. In this case, 2 molecules of acetylene (C₂H₂) react with 5 molecules of oxygen (O₂) to produce 4 molecules of carbon dioxide (CO₂) and 2 molecules of water (H₂O), along with the release of heat.

The balanced equation shows that the number of atoms of each element is the same on both the sides of the equation, in accordance with the law of conservation of mass.

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A substance's temperature in physics' laws, is directly related to the average kinetic energy of its particles. Because the particles' mass is constant, they must travel faster as the temperature rises.

In physics, the kinetic energy of an object is the energy it possesses as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a given speed.

The body retains its kinetic energy, having acquired it during acceleration, until its speed changes.

Kinetic energy is present in an accelerating ball, a walking human, and electromagnetic radiation like light. Another type of kinetic energy is the energy associated with the continuous, random bouncing of atoms or molecules.

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The number that is given as digits is established using significant figures. A meaningful representation of numbers is carried by these digits. Frequently, significant digits are employed in place of figures.

Thus, By counting all of the values beginning with the first non-zero digit on the left, we may determine the number of significant digits.

The crucial or important digits that accurately represent the meaning of a certain number are known as the significant figures of that number.

6.658, for instance, has four significant digits. These huge amounts give the numbers accuracy. Additionally, they are known as significant digits.

Thus, The number that is given as digits is established using significant figures. A meaningful representation of numbers is carried by these digits. Frequently, significant digits are employed in place of figures.

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The answer is: The electronic configuration of Nitrogen is \(1s^22s^22p^3\).

Electronic configuration: The electronic configuration is defined as the distribution of electrons of an atom in the atomic or molecular orbitals and is written using the labels for the subshell.

How to decide which orbital is filled first?

(Shown in image)

         \(1s^22s^22p^3\)

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Nitrogen's complete electron configuration is 12s2s22p3.

The shorthand electron configuration for noble gases is [He] 2s22p3. Nitrogen has an atomic number of 7. The nitrogen atoms' nucleus contain this many protons. An atom that is neutral has an equal number of protons and electrons. Thus, the ground state electron configuration will consist of 7 electrons in the suitable s and p orbitals (state of lowest energy). For nitrogen, the entire electron configuration is 1s22s22p. Scientists may easily express and explain how the electrons are organized around the nitrogen atom's nucleus by using the configuration notation for nitrogen (N). As a result, it is simpler to comprehend and forecast how atoms will cooperate to form chemical bonds.

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