Answers
Answer:
35 ElementsExplanation:
There are 35 elements that live in the p-block which can be seen here. The p-block is home to the biggest variety of elements and is the only block that contains all three types of elements: metals, nonmetals, and metalloids. Generally, the p-block elements are best described in terms of element type or column number.
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Related Questions
Can someone help me with these?
Answers
How many grams is 5.00 moles of carbon dioxide?
Answers
Answer:
220.1 grams of CO2.
A conclusion in science states whether or not a hypothesis is correct
or not?
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Answer:it do not states
Explanation:
I NEED HELP ASAP A liquid does ____________ have a definite shape but has a __________ volume. *
Answers
Answer:
A liquid does NOT have a definite shape but has a DEFINITE volume.
Explanation:
If you pour water in a shaped glass or container, it takes that shape of the object. But if you pour water on the table, it will run all aver the place.
How do plants release oxygen and not carbon dioxide in the air
Answers
Answer:
Photosynthesis
Explanation:
The process of photosynthesis converts sunlight and water into glucose which has a by-product of oxygen. The plant then consumes the glucose using cellar respiration and converts the glucose with oxygen into energy and carbon dioxide. Plants release both oxygen and carbon dioxide, but they use photosynthesis way more often so they release more oxygen and consume more carbon dioxide.
Explanation:
Plants release oxygen into the air through a cool process called photosynthesis. They use sunlight, chlorophyll (a green pigment), and water to turn carbon dioxide into glucose (a type of sugar) and oxygen. It's like a plant superpower! The oxygen they make gets released into the environment through tiny openings called stomata on their leaves. So, plants not only make food for themselves, but also give us the fresh oxygen we need to breathe.
how many calories are in a snack with 175 kj of energy
Answers
Answer:
41826.05 Calories
Explanation:
1 J = 0.239006 Calories
175 KJ
= 175 x 1000 J
= 175000 J
175000 J to Calories
= 175000 x 0.239006
= 41826.05 Calories
Answer: 41.8
Explanation:
Acellus verified ✅
Calculate the mass of NaCO3 used in experiment. SHOW WORK — 15 points!!
Mass of empty evaporating dish: 46.233g
Mass of evaporating dish + sodium bicarbonate: 48.230g
Mass of evaporating dish + product after 1st drying: 47.504 g
Mass of evaporating dish: 46.233g
Mass of evaporating dish + product after 2nd drying: 47.485
Answers
The mass of sodium bicarbonate (NaHCO₃) used in the experiment is 1.997 g
Calculating massFrom the question we are to calculate the mass of NaHCO₃ (sodium bicarbonate) used in the experiment
From the given information
Mass of empty evaporating dish = 46.233g
Mass of evaporating dish + Sodium bicarbonate = 48.230g
∴ Mass of sodium bicarbonate (NaHCO₃) = [Mass of evaporating dish + Sodium bicarbonate] - [Mass of empty evaporating dish]
Mass of sodium bicarbonate (NaHCO₃) = 48.230g - 46.233g
Mass of sodium bicarbonate (NaHCO₃) = 1.997 g
Hence, the mass of sodium bicarbonate (NaHCO₃) used in the experiment is 1.997 g
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Cellular respiration occurs in this part of the animal cell
Answers
why do cells prefer to use carbohydrates as a source of energy before they use fats and proteins.
Answers
The primary role of carbohydrates is to supply energy to all cells in the body. Many cells prefer glucose as a source of energy versus other compounds like fatty acids. Because the energy from glucose comes from the chemical bonds between the carbon atoms.
Answer:
Carbohydrates are primary sources of energy but fats and lipids are no primary sources of energy.
Which solids are insoluble in water.
Answers
Some types of solids that are insoluble in water are:
Metals. (most of them)Non-Metallic ElementsMetal OxidesSome Non-Metallic ElementsMetal Carbonates (most of them)Metal Sulfides (most of them)Salts (some of them)Which solids are insoluble in water?Many solids are insoluble in water, meaning they do not dissolve in water to a significant extent. Here are some examples of common solids that are generally insoluble in water:
Metals: Most metals, such as gold, silver, platinum, and copper, are insoluble in water.
Non-Metallic Elements: Many non-metallic elements, such as carbon (in the form of graphite or diamond), sulfur, phosphorus, and iodine, are insoluble in water.
Metal Oxides: Some metal oxides, particularly those of less reactive metals, are insoluble in water. Examples include aluminum oxide (Al2O3), iron(III) oxide (Fe2O3), and lead(II) oxide (PbO).
Metal Carbonates: Most metal carbonates are insoluble in water. Examples include calcium carbonate (CaCO3), lead(II) carbonate (PbCO3), and copper(II) carbonate (CuCO3).
Metal Sulfides: Many metal sulfides are insoluble in water. Examples include lead(II) sulfide (PbS), silver sulfide (Ag2S), and mercury(II) sulfide (HgS).
Insoluble Salts: Certain salts have limited solubility in water. Examples include silver chloride (AgCl), lead(II) iodide (PbI2), and calcium sulfate (CaSO4).
It's important to note that while these solids are generally insoluble in water, they may exhibit some solubility to a small extent. The solubility of a solid in water can vary depending on factors such as temperature, pressure, and the presence of other solutes.
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Under what conditions would wind blow weakly or very little?
50 Points and Brainliest for right answer
Answers
Answer:
A gentle wind or when the wind blows slowly, it is called a breeze.
Explanation:
Breezes are the result of differences in air temperature. Warm air rises, leaving behind low pressure near the ground. Cold air creates high pressure and sinks to compensate; wind then blows from areas of high pressure to areas of low pressure to try to equalize pressures.
Answer:
under low pressure of air makes wind blow weakly or very little.
What compound is formed when 2,2-dimethyloxirane (2-methyl-1,2-epoxypropane) is treated with ethanol containing sulfuric acid
Answers
Answer:
2-ethoxy-2-methylpropan-1-ol
Explanation:
On this reaction, we have an "epoxide" (2-methyl-1,2-epoxypropane). Additionally, we have acid medium (due to the sulfuric acid \(H_2SO_4\)). The acid medium will produce the hydronium ion (\(H^+\)). This ion would be attacked by the oxygen of the epoxide. Then a carbocation would be produced, in this case, the most stable carbocation is the tertiary one. Then an ethanol molecule acts as a nucleophile and will attack the carbocation. Finally, a deprotonation step takes place to produce 2-ethoxy-2-methylpropan-1-ol.
See figure 1
I hope it helps!
Is Fe^+2 the same ion as Fe^2+?
Yes, it doesn't matter if you put the number first or the sign first therefore... +2 = 2+
No, Fe^+2 is a cation and Fe^2+ is an anion
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Answer:
It doesn't matter because either or it's still a cation because its positive
What charge does Magnesium acquire when it becomes an ion?
Answers
A magnesium atom will form a cation with two fewer electrons that protons and a charge of 2+.
a sample of ammonia has a mass of 45.5g. how many molecules are in this sample
Answers
Answer:
1.61 x 1024 molecules
Explanation:
See image below for step-by-step explanation
determine the volume of liquid in each graduated cylinders.
Answers
the number of particles in a mole if substance
A.avografo number
b.molar volume
c.molar mass
d.molar ratio
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represented by Na
6.02*10^23
A hydrogen atom absorbs a photon of visible light and its electron enters the n = 4 energy level. Calculate the change in energy of the atom and the wavelength (nm) of the photon.
Answers
The table describes a gas stored in four different containers. Properties of Stored Gas Container Properties 1 · Low number of collisions with container walls · Medium average kinetic energy · Large number of particles 2 · Large number of collisions with container walls · Medium average kinetic energy · Small number of particles with little spaces between them 3 · Large number of collisions with container walls · High average kinetic energy · Large number of particles with large spaces between them 4 · Few collisions with container walls · Low average kinetic energy · Small number of particles Which container has gas stored at the highest temperature? 1 2 3 4
Answers
Container 3 has the gas stored at the highest temperature.
Temperature is a measure of the average kinetic energy of the particles in a substance. In the given table, it is stated that container 3 has a large number of collisions with container walls, high average kinetic energy, and large number of particles with large spaces between them.
These properties indicate that the gas in container 3 has higher kinetic energy and more vigorous movement compared to the other containers.
Container 1 has a low number of collisions with container walls and a medium average kinetic energy. This suggests that the gas in container 1 has lower energy and less movement than the gas in container 3.
Container 2 has a large number of collisions with container walls, but it also has a small number of particles with little spaces between them. While the collisions may be frequent, the limited number of particles and the lack of space between them may result in lower overall kinetic energy compared to container 3.
Container 4 has few collisions with container walls, low average kinetic energy, and a small number of particles. These properties indicate that the gas in container 4 has the lowest energy and least movement among all the containers.
Container 3
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Draw a structural formula for the major product of the reaction shown.
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Draw a structural formula for the major product of the reaction shown:
The structural formula for the major product (2-butene) of the given reaction is as follows:$$\ce{CH3CH2CH=CH2}$$
The given reaction is an acid-catalyzed dehydration reaction.
During the reaction, the hydroxyl group (OH) and the adjacent hydrogen atoms (H) on the reactant alcohol (2-butanol) undergo dehydration (loss of water) to form an alkene (2-butene) as the major product.
The reaction is shown below:$$\ce{CH3CH2CH2CH2OH + H2SO4 ->[\Delta] CH3CH2CH=CH2 + H2O}$$To draw the structural formula for the major product of the given reaction, we need to consider the following points:
1. The reactant alcohol (2-butanol) is a four-carbon alcohol with the hydroxyl group (OH) attached to the second carbon atom (C2) of the chain.
2. The product alkene (2-butene) will be a four-carbon alkene with a double bond between the second and third carbon atoms (C2 and C3) of the chain.
The other two carbon atoms will have a single bond with the adjacent carbon atoms and a hydrogen atom each attached to them.
3. The major product will be formed via the elimination of water (dehydration) between the hydroxyl group (OH) and the adjacent hydrogen atoms (H) on the second carbon atom (C2) of the reactant alcohol (2-butanol).
4. The acid catalyst (H2SO4) does not participate in the reaction and remains unchanged. It only facilitates the formation of the alkene by providing a proton (H+) to the hydroxyl group (OH) and a medium for the elimination of water.
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draw a well-labelled diagram showing how your body digests food
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i too used it
i thought it will help
nice time. .....
Explanation:
...................
Just need to know the one with the Hexagon
Answers
Answer:2,4-dichlorohexane
Explanation:
Hope it helps
HelapPPPpPPPPpThe three states of matter that may change during a physical change are O atoms, molecules, electrons O color, shape, size O solid, liquid, gas
Answers
Answer:
Solid liquid and gas
Explanation:
Which of the following determines the range of spectral lines produced during electron transition?
Answers
A.The total number of energy levels the electron can jump to.
i hope i helped.
Which of the following are the weakest among the intermolecular forces? (5 points)
Ion-dipole forces
Hydrogen bonding
Dipole-dipole forces
London dispersion forces
Answers
London dispersion forces are known to be the weakest among the intermolecular forces. Therefore, option (D) is correct.
What are London dispersion forces?London dispersion forces can be described as a type of intermolecular force acting between atoms and molecules that are generally electrically symmetric. The electrons are generally symmetrically distributed with respect to the nucleus and are part of the van der Waals forces.
The electron distribution around an atom undergoes varies in time which creates electric fields felt by other nearby atoms and molecules.
The net effect is in electron positions in an atom produce a corresponding redistribution of electrons in other atoms. These are the weakest among the other intermolecular forces.
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if two substance are at the same temperature, their enthalpy
Answers
Answer:
cannot be measure
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Life decision pls help so here’s my problem when I look at the screen for a long time my eye gets like red like strings going to my eye and this happens both two my left and right eye from both sides and one eye is blurry and other is not when I look from fat and something when I look it’s blurry from far with both eyes?
Answers
Answer: I would suggest blue light glasses also go to a doctor because your eye veins are bullging and thats making it worse also Im not a doctor so i cant be sure but this is my tip also be careful looking under microscopes or anything with light.
Explanation:
What is the minimum volume (mL) of 4.00 M KOH required for the reaction below to go to completion (only products present at the end of the reaction) if 1.1798 g of aluminum foil is used?
2 Al(s) + 2 KOH(aq) + 6 H2O(l) → 2 KAl(OH)4(aq) + 3 H2(g)
Answers
The minimum volume of 4.00 M KOH required for the reaction to go to completion is 10.94 mL.
The first step is to determine the moles of aluminum foil used in the reaction. We can use the molar mass of aluminum to convert the given mass to moles:
1.1798 g Al / (26.98 g/mol Al) = 0.04375 mol Al
According to the balanced chemical equation, the reaction requires 2 moles of KOH for every mole of Al. Therefore, we need:
0.04375 mol Al x (2 mol KOH / 2 mol Al) = 0.04375 mol KOH
To calculate the minimum volume of 4.00 M KOH required, we can use the equation:
Molarity x Volume = Moles
Rearranging for volume, we get:
Volume = Moles / Molarity
Plugging in the values, we get:
Volume = 0.04375 mol KOH / 4.00 M = 0.01094 L = 10.94 mL
As a result, the minimum volume of 4.00 M KOH required to complete the reaction is 10.94 mL.
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For the reaction
2NH3(g)↽−−⇀ 3H2(g)+N2(g)
the equilibrium concentrations were found to be [NH3]=0.250 M, [H2]=0.470 M, and [N2]=0.800 M. What is the equilibrium constant for this reaction?
eq=
Answers
Rounding to the appropriate number of significant figures, the equilibrium constant (Kc) for the reaction is approximately 1.66.
To calculate the equilibrium constant (Kc) for the given reaction, we can use the formula:
Kc = ([H2]^3 * [N2]) / [NH3]^2
Plugging in the given equilibrium concentrations, we have:
Kc = (0.470^3 * 0.800) / (0.250^2)
Calculating the numerator:
(0.470^3 * 0.800) = 0.1037032
Calculating the denominator:
(0.250^2) = 0.0625
Now, dividing the numerator by the denominator:
Kc = 0.1037032 / 0.0625 = 1.6592512
The equilibrium constant represents the ratio of the concentrations of products to reactants at equilibrium. In this case, the equilibrium constant is greater than 1, indicating that the products (H2 and N2) are favored at equilibrium. This means that the forward reaction is favored, leading to the formation of more products compared to reactants.The equilibrium constant value of 1.66 suggests that the forward reaction is moderately favored at equilibrium, but without additional context, it is difficult to determine the extent of the reaction or the relative concentrations of reactants and products at the beginning of the reaction.
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Identify and describe the three ways that mutations affect organisms?
Answers
Answer:
The ways that mutation can affect an organism include:
Changing the physical characteristics of the organism.
It can impact the way that the DNA is able to code the genetic information.
Also, mutation can lead to the death of an organism.
What is mutation?
Mutation simply means a change in the DNA sequence of an organism. It can result from DNA copying mistakes that were made during the cell division.
Mutation can affect an organism as it changes the phenotype of the organism. It can also impact the way that the DNA is able to code the genetic information and lead to the death of an organism.