from a qualitative, valence-bond perspective, what is the hybridization of carbon-1 (c1) in 1-butyne?spsp^2sp^3

Answer:

i dont no this one plz the question is hard

Answer:

118 elements have been discovered so far

Explanation:

C

R. F. M (Relative Formula Mass) of C=12

12g of C=1 mole

1.39g of C=(1*1.39)/12

=0.1158 moles

The given mass of the laboratory worker is 50 kg and the radiation that they were exposed to is 20 mj of neutron radiation with an rbe of 10. We have to find the dose in mSv.

The dose equivalent can be calculated using the formula, Given, Mass of the worker, m = 50 kg Energy absorbed, E = 20 MJRBE (Relative Biological Effectiveness) = 10 We have,1 Sv = 1 Gy x Q, where Q is a quality factor. As per the question, the RBE value is 10 (for neutron radiation).

Now,1 Sv = 1 Gy x Q = 1 x 10 = 10 Gy From the formula, Dose equivalent = Energy absorbed / mass of the worker x RBEWe know, 1 Gy = 1 J/kg∴ Energy absorbed = 20 x 10^6 J Mass of the worker = 50 kgRBE = 10Dose equivalent = Energy absorbed / mass of the worker x RBE= (20 x 10^6) / (50 x 10^3) x 10= 40 mSvTherefore, the dose in mSv is 40.

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A weather map of Chicago with a high pressure system and warm front, so the upcoming weather be Warm, dry, clear skies in Chicago.

High pressure of air tries to compress the gas from upper atmosphere to lower atmosphere.

When any gas has high pressure then it sinks towards the land from the upper atmosphere, and at the upper part air gets cool and form water vapor. When air comes towards the land then, it becomes warm and dry as it doesn't participate in the formation of precipitate. Due to which we are able to see clear sky at the dry days.

Hence, option (1) is correct i.e. Warm, dry, clear skies are the upcoming weather.

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Answer:

A. Warm, dry, clear skies

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Glyphosate was initially thought to have no effect on human health because it primarily targets enzymes found only in plants and bacteria, not humans.

Additionally, the compound was believed to have a low toxicity level and was considered to be safe when used according to the labeled instructions.

However, recent scientific studies have suggested potential health risks associated with glyphosate exposure, including links to cancer and other health issues.

These studies have prompted further investigation and controversy surrounding the safety of glyphosate in herbicides.

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The completed table of the isotopes of the given elements is found in the attachment.

Isotopes are variations of chemical elements that have a varying number of neutrons but the same number of protons and electrons. In other words, isotopes are different forms of the same element that have different amounts of nucleons (the sum of protons and neutrons) because of variations in the total number of neutrons in each of their individual nuclei.

For instance, the carbon atoms carbon-14, carbon-13, and carbon-12 all exist. A sum of 8 neutrons are present in carbon-14, 7 neutrons are present in carbon-13, and 6 neutrons are present in carbon-12.

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In the given electrolytic cell setup having molten zinc iodide as the electrolyte, reduction of zinc ions to gray coloured zinc occurs at the cathode, whereas iodide ions get oxidized to reddish-brown iodine at the anode.

An electrolytic cell is a type of electrochemical cell that uses an external source of electrical energy to power a chemical process that would not occur otherwise. This contrasts with a galvanic cell, which serves as a power source and the cornerstone of a battery.

Any apparatus in which electrical energy is changed into chemical energy or vice versa is an electrolytic cell. Such a cell normally consists of two electrodes, which can be metallic or electronic conductors, kept apart from one another and in contact with an electrolyte, which is commonly an ionic substance that has been dissolved or fused.

In the given setup, the molten zinc iodide is the electrolyte, and the half reactions occurring at the two electrodes of the electrolytic cell are:

Half reaction at the cathode:

\(Zn^{2+} (l) + 2e^- \rightarrow Zn (s)\)

Half reaction at the anode:

\(2I^- (l) \rightarrow I_2 (s) + 2e^-\)

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Answer:

bromophenol

Explanation:

when phenol is treated with excess bromine water, it gives bromophenol. This reaction is an example of electrophilic substitution in which the phenol molecule acts as an electron-rich substrate and the bromine in bromine water acts as an electrophile, leading to the substitution of a hydrogen atom in phenol with a bromine atom.

Answer:

it gives 2,4,6-Tribromophenol.

Answer:

c

Explanation:

The forward acceleration of the bicycle is 1.52 m/s². Option A is correct.

Forward acceleration refers to the rate at which an object's velocity increases in the forward direction. It is measured in units of meters per second squared (m/s²).

To find the forward acceleration of the bicycle, we need to use Newton's second law of motion, which states that force is equal to mass times acceleration (F=ma).

Given:

Force (F) = 125 N

Combined mass (m) = 82 kg

Using the formula:

a = F/m

Substituting the values, we get:

a = 125 N / 82 kg

a = 1.52 m/s²

Hence, A.  1.52 m/s² is the correct option.

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The pH is lowest at 1.0 M LiC0. c. The pH is lowest in 1.5 M NH4Cl. The pH is lowest at c. 1.0 M NaF. c. The pH is lowest at 1.0 M Mg(NO3)2. d. The pH is lowest at 1.0 M Ca(NO3)2. f. The pH of CO2 and water is lower than that of O2 and water.

The term "lowest pH" describes the solution's or mixture's most acidic pH value. On a scale from 0 to 14, the pH scale determines the acidity or basicity of a solution, with 7 being neutral, values lower than 7 being acidic, and values higher than 7 being basic. As hydrogen ions (H+) are more abundant than hydroxide ions (OH-) in a solution with the lowest pH, it is said to be extremely acidic. The kind and quantity of a solution's constituents, such as salts or acids, can influence its pH, which can have a significant impact on a variety of chemical and biological processes.

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The percentage yield of the reaction is 76.1, when the actual yield and theoretical yield is 37.5 g and 49.28 g respectively.

First of all we would write a balanced chemical equation for the reaction between calcium oxide (CaO) and hydrochloric acid (HCl):

CaO + 2HCl → CaCl₂ + H₂O

We can now see that 1 mole of CaO reacts with 2 moles of HCl to produce 1 mole of CaCl₂ and 1 mole of H₂O.

Calculating the theoretical yield of CaCl₂:

m(CaO) = 25 g / 56.08 g/mol = 0.445 mol

n(CaCl₂) = n(CaO) = 0.445 mol

m(CaCl2) = n x M

= 0.445 mol x 110.98 g/mol = 49.28 g

Therefore, the theoretical yield of CaCl₂ is 49.28 g.

To find the percentage yield of the reaction:

% yield = (actual yield / theoretical yield) x 100

The actual yield of CaCl₂ is given as 37.5 g.

% yield = (37.5 g / 49.28 g) x 100

= 76.1%

Therefore, the percentage yield of the reaction is 76.1.  

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Answer:

Explanation:

1 km =1000 m

1km=1000000 mm then

1mm=1/1000000=1*10^-6

1 hour =3600 sec

1 sec=1/3600=2.8*10^-4 hr

now

1000.0 km/hr=1000.0*1*10^-6/2.8*10^-4=3.571 mm/s

The human activity creating water pollution and depletion are uses of fertilizers, detergents and chloro flouro carbon many other things.

Water pollution is defined as the contamination of water bodies, usually as a result of human activity, in such a way that their lawful uses are harmed.

The activities of human that creating water pollution are:

And depletion in the ozone layer are due to halogen source gases, which contain chlorine and bromine atoms, are produced by human activities. These emissions into the atmosphere eventually contribute to ozone depletion in the stratosphere.

Hence human activities are uses of fertilizers, detergents and many other things.

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Answer:(part a) Lithium and Chlorine, (part c) Potassium and Oxygen are likely to form an ionic compound.

Explanation:

brainliest please

Two elements having same properties as magnesium are calcium and strontium. The number of protons and neutrons in  potassium is 19 and number of neutrons is 20.

Groups in periodic table are vertical columns with elements of similar physical and chemical properties. All elements are classified into different groups based in the number of valence shell electrons.

Elements of same group have same number of valence electrons. The element magnesium Mg have 12 electrons with 2 valence electrons. Its group members are shown under Mg in the column and they are calcium, strontium and rubidium.

Number of electrons in an tom is equal to the number of protons and this is called the atomic number. The atomic number o potassium is 19 and it have 19 electrons and protons.

Number of electrons = mass number-number of protons

                                   = 39 -19 =20.

Hence, potassium  (K) have 19 electrons and protons and 20 neutrons.

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The silver ring of the same mass of 27.5 gm of gold will have 1.9 times more atom.

We need to find moles first,

Moles = mass/ Atomic Mass

Then number of atoms can be calculated from moles,

So , no. of moles of gold ring = 27.5g/196.967

= 0.13 moles.

Since 1 mole contains 6.023 x 10^23 atoms, then 0.13 mole contains (6.023 c 10^23) x 0.13 atoms

= 7.82 c 10^22 atoms.

no. of moles for silver = 27.5/107.87

= 0.25 moles.

This contains (6.023 x 10^23) x 0.27 atoms.

= 1.5 x 10^23 atoms.

So 27.5g of silver contains 1.67 x 10^23/9.17 x 10^22 more atoms than 27.5g of gold.

So 27.5g silver contains 1.9 x more atoms than 27.5g of gold.

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Answer:

Taking the animal kingdom as an example, we can see that it is split into two clear groups: Invertebrates - animals without a backbone. Vertebrates - animals with a backbone.

Explanation:

Explanation:

J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.

there u go :>

The experiment that proved atoms  positive, negative, and neutral particles is the J.J. Thomson's experiments with cathode ray tubes, which showed that all atoms contain  negatively charged s electrons, on the other hand  Rutherford's gold foil experiment showed the atom  is present in mostly empty space with a tiny, dense, positively-charged nucleus.

J J Thomson's experiment was used to determine the existence of corpuscles or electrons which says the cathode rays are charges of negative electricity which is carried by particles of matter.

He studied about electric discharge with high vacuum cathode ray tube and there were many other scientists who also have done the same experiment on the similar field.

Cathode ray is made up of of negatively-charged particles and these particles must exist as part of the atom and the mass of the particle is only ∼ 20001​ start fraction, 1, divided by, 2000, end fraction the mass of a hydrogen atom.

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None, it will all be lost as Carbon dioxide.

Krebs or citric acid cycle is also known as The tricarboxylic acid (TCA) cycle.

The main source of energy for cells and an important part of aerobic respiration. Aerobic respiration is the respiration occurs in the presence of oxygen.

This cycle harnesses the available chemical energy of the acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).

TCA cycle metabolizes acetate that is derived from carbohydrates, proteins, and fats to form adenosine triphosphate (ATP) which is the body's energy currency.

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There are seven sequential steps of scientific research.

The scientific method is a process used when conducting experiments and exploring observations. Some areas of science rely more heavily on this method to answer questions, as they are more easily tested than other areas.

This method aims to discover the relationships between cause and effect in various situations and applications. The 7 steps of scientific research are -

Therefore, there are seven sequential steps of scientific research.

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Answer:

you have to use the avogadro's constant of 6.023×10^23 to calculate the number of molecules of carbon dioxide.and you also have to use the molecular mass which is 44.

35.5/44×6.023×10^23

=4.85×10^23

I hope this helps and sorry if it's wrong

Answer:

C.at 100•C.30 g of NaNO3 is dissolved in 100 g of water

The mass of sodium chloride : 3.5 g

Given

Reaction :

2.5g of sodium sulphate + 4.5g of barium chloride ⇒ 3.5g of barium sulphate + sodium chloride

Required

The mass of sodium chloride

Solution

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

From the reaction :

mass of reactants = 2.5 g + 4.5 g = 7.0 g

mass of products = 3.5 g + mass of sodium chloride

mass of reactants = mass of products

7.0 g = 3.5 g + mass of sodium chloride

mass of sodium chloride = 7 g - 3.5 g =3.5 g

Answer:

Explanation: As the good witch Azura said when she was in the bog of immediate regret I challenge you to a witches duel.

im sorry if that was bad i got nothing lol

also took it from The Owl House

Answer:

The solute is the substance being dissolved.

The solvent is the substance dissolving the solute.

Therefore, the salt is the solute and the water is the solvent.

Explanation:

The salt is the solute.

The answer is option

The reaction:

is a Synthesis reaction, because from 2 different substances it is produced