An atom's ground state is its lowest energy conceivable state, in which all of its electrons are at their lowest possible energy levels.
What degree of energy does an atom contain?The energy levels of the atoms match the rows of the Periodic List of Elements when you look at it. The last electrons of the two elements on the top row, hydrogen and helium, are filling their initial energy level.
The second energy level of the eight components in the second row is being filled. The chemical characteristics of an element are determined by its outermost electrons.
Starting with the level nearest to the nucleus, the energy levels were built up. By using the Aufbau Principle, electrons are filled in by moving from the initial lowest-energy level to a second, slightly higher energy level, and finally to the third, even higher energy level.
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the freezing point of water is depressed when mixed with ethylene glycol. ethylene glycol is used as a de-icing fluid for windshields and aircraft, as an antifreeze in automobile engines. a mixture of 60% ethylene glycol and 40% water freezes at −45 ∘c.
The temperature in degrees Fahrenheit is -49°F and the temperature in Kelvin is 228K.
How does temperature conversion take place?
Celsius to Fahrenheit-
In order to convert temperature in degrees Celsius to Fahrenheit, the formula we use is multiplied by 1.8 (or 9/5) and added to 32.
i.e, (°C × 9/5) + 32 = °F
Given the water freezes at -45°C, so temperature in degree Fahrenheit is
(-45°C × 9/5) + 32 = -49°F
Celsius to Kelvin-
In order to convert the degrees Celsius to Kelvin, the formula we use is
Kelvin = Celsius + 273.15.
i.e, K = °C + 273.15
Given the water freezes at -45°C, so temperature in Kelvin is
K = -45 + 273.15 = 228 K
So after conversion the temperature in degrees Fahrenheit is -49°F and the temperature in Kelvin is 228 K.
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Determine the percent abundance for Fe-57 in the attached photo. The average atomic mass for Fe is 55.845 u.
Please help with step by step. I'll choose the correct answer the brainliest!
The percent abundance for Fe-57 in the attached photo if the average atomic mass for Fe is 55.845 u is 2.1%.
How to calculate percent abundance?The relative abundance is the percentage of a particular isotope that occurs in nature.
According to this question, four isotopes of Fe (iron) was given. The percent abundance can be calculated using the following expression;
M1(0.05845) + M2(0.91754) + M3 (x) + M4 (y) = M(E)
Where;
M1 - M4 = the mass of isotopes 1 - 4x = the relative abundance of isotope 3y = the relative abundance of isotope 4M(E) = the average atomic mass of Fe3.153 + 51.32 + 56.9354x + 57.9333y = 55.845
56.9354x + 57.9333y = 55.845 - 54.475
56.9354x + 57.9333y = 1.37......eqn 1
0.97599 + x + y = 1
x + y = 0.02401.......eqn 2
Solving both equations simultaneously using substitution method
x = 0.02401 - y
56.9354 (0.02401 - y) + 57.9333y = 1.37
1.3670 - 56.9354y + 57.9333y = 1.37
1.3670 + 0.9979y = 1.37
0.9979y = 0.003
y = 0.003006
x = 0.02401 - y
x = 0.02401 - 0.003006 = 0.021
Therefore, the percent abundance for Fe-57 in the attached photo if the average atomic mass for Fe is 55.845 u is 2.1%.
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Is there a relationship between groups and periods on the periodic table and electron configuration?
Considering the relationship between groups and periods on the periodic table and electron configuration:
The groups in the periodic table determines how many electrons are found in the outermost shell of the atom of the element.The periods in the periodic table determine how many electron shells there are in the atom,What is electronic configuration?Electronic configuration is the arrangement of the electrons around the nucleus of an atom in orbits or shells or energy levels.
The electronic configuration of atoms depends on the groups and periods which the element belongs to.
The groups in the periodic table refer to the vertical columns in the periodic table while the periods in the periodic table refers to the horizontal rows.
The groups in the periodic table determines how many electrons are found in the outermost shell of the atom of the element.
The periods in the periodic table determine how many electron shells there are in the atom,
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What is your evidence? This can be in bulleted points.
can you help I don't now how to explain it.
in the lab, we used two solvents, one for the extraction and one for the recrystallization. what solvent did we use for the extraction, and which for the recrystallization? what solvent is trimyristin more soluble in, and why?
The solvent we use for extraction is diethyl ether and the solvent we use for the recrystallization is acetone.
Trimyristin is more soluble in diethyl ether rather than in acetone. In order to get extracted from the nutmeg, Trimyristin has to be soluble in the solvent.
Why is Trimyristin more soluble in diethyl ether?
Trimyristin was extracted in the ether rather than acetone since the molecule is predominantly nonpolar and more soluble in the latter. Trimyristin was re-crystallized in acetone since acetone is more polar than ether, which indicates that trimyristin won't dissolve as well in acetone.Trimyristin can be easily dissolved by diethyl ether, a somewhat organic material, more readily than by an aqueous solvent. It can be more easily dissolved by acetone, an organic solvent, at a much higher temperature than by diethyl ether.To learn more about extraction and recrystallization visit:
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Someone pls help meeee
A biome is a biogeographical unit made up of a biological community that has developed as a result of its physical surroundings and a common local climate.
1) The majors two characteristics that determines the terrestrial biomes are rainfall and temperature.
2) Latitude, which runs from 0° at the equator to 90° (North or South) at the poles, is a geographic coordinate that describes the north-south position of a point on the surface of the Earth.
Since the latitude degrees are parallel, the distance between each degree is constant
3) Winter, spring, summer, and autumn are the four seasons that alternate in temperate areas.
A area or climate that is never very hot or extremely cold is said to as temperate climate.
4) The polar climate are places where the climate is extremally cold and the temperature is below zero degrees.
5) The two majors characteristics of aquatic biome are water bodies and sunlight.
6) marine regions such as oceans have high salinity.
7) Fresh water have low salinity .
8) Deep water plants have short plants because less amount of sunlight reaches under water.
9) Shallow water have medium sized of plants because the amount of sunlight reaches to the plant but enough amount is reached.
It is challenging to categorize the entire planet into a small number of ecological zones, in part because to the minor variances that exist everywhere on the planet and the gradual transition from one biome to another.
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A rectangular block of copper metal weighs 1896 g. The dimensions of the block are
8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper?
Based on the mass and volume of the copper, the density of copper is 8.92 g/cm³.
What is the density of a substance?The density of a substance is the ratio of the mass of that substance and the volume of the substance.
mathematically:
Density = mass of substance/volume of substanceFrom the data provided:
mass of the copper = 1896 g
volume of the copper can be calculated as follows:
volume = length * width * height
Volume of copper = 8.4 cm * 5.5 cm * 4.6 cm
Volume of copper = 212.52 cm³
Density of copper = 1896 g/212.52 cm³
Density of copper = 8.92 g/cm³
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Suppose naoh standardization of khp determined that a volume of 25. 00 ml naoh has a concentration of 0. 049 m. Suppose 22. 20 ml of khp was used to get to the endpoint in this standardization. What is the mass of khp dissolved in 50. 00 ml of the standardization khp titrant?.
0.5634 g of KHP was dissolved in 50.00 mL of the standardization titrant.
1 mol of potassium hydrogen phthalate reacts with 1 mol of sodium hydroxide to form 1 mol of potassium sodium phthalate and 1 mol of water. Because of this molar ratio, the amount of NaOH used will be equal to the amount of KHP present in the sample of the standardization titrant.
c = n/V, so n = c * V = 0.049 M * 0.025 L = 0.001225 mol of NaOH and KHP
With this information, we can obtain the moles of KHP present in the 50.00 mL of the titrant:
22.20 mL : 0.001225 mol = 50.00 mL : X
X = 0.001225 mol * 50.00 mL / 22.20 mL = 0.002759 mol
The next step is utilizing the potassium hydrogen phthalate molar mass (204.22 g/mol), to calculate the grams of it dissolved in the sample:
n = m/M, so m = n * M = 0.002759 mol * 204.22 g/mol = 0.5634 g
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A blank is represented by a chemical blank.
The most abundant elements in the foods and beverages you consume are oxygen, carbon, hydrogen, and nitrogen. Why might having these elements in consumables be useful?.
These four elements - oxygen, carbon, hydrogen, and nitrogen - together make up more than 95% of the mass of the human body, and body cannot make elements, so it is helpful to have them in consumables.
What are food and beverages?By the definition, food and beverage is the stuff we eat and drink. But what kinds of things are those? They're meat and the vegetables, of course. But they could also be the spices or seasonings, or beverage pieces. For us, that means the food and beverage is a wide-ranging category that has no limits on potential. We do our best to take the advantage of that when making each order.
Food and beverages service training is all about serving the customers with drinks and treats. This can be in a restaurant, a cafeteria or even a banquet. Be ready to fill the orders, take orders and make sure they get the right food item they’re after.
It’s important to note that the food and beverage service training will vary from one school to the next. This is because every college and university, as well as each faculty within these institutions, handles this process in different way. While general layout of instruction remains the same, some aspects of the learning experience might change.
For example, some schools may have separate cafeteria location for the purpose of teaching food and beverage service skills. Many establishments choose to use their existing dining hall or other area on campus to accomplish this task though, along with the during-class learning experiences.
Food: Food is anything which provides the essential nutrients to an organism for growth ,repair of body and perform all the works. Food provides the nutrients like carbohydrates, protein, fat and minerals.
Beverage: Any liquid including water which can quench thirst is called a beverage, eg Tea, coffee, milk ,butter milk, coco Cola soda lassi are beverage.
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which is more efficient , the incandescent or fluorescent bulb
Fluorescent bulb is the more efficient one.
An electric bulb which has a filament inside it and the electricity passes through the filament and it get heated an it glows. The condition inside the bulb is vacuum or inert gas. This is an incandescent bulb. they uses a lot of energy.
Fluorescent bulb is a mercury vapour low pressure, gas discharge lamp which will use less energy and fluoresce to produce visible light. So in this the electric current will cause the gas to get exited and there is a production of UV light which causes the coating on the inside of the lamp to glow..
Fluorescent bulb is the more efficient that the incandescent bulbs. They also have more life span than incandescent bulbs.
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I’m giving brainlest help meee
Answer:
mmmm possibly that they are all created of atoms?
Explanation:
Answer:
Im not sure but i would say that they are all solid
Explanation:
Metals participate in two types of single-displacement reactions. A reactive metal can displace _____ gas either from water or from an aqueous acid. A _____ reactive metal can also displace the ion of a _____ reactive metal from solution.
A reactive metal can displace HYDROGEN gas either from water or from an aqueous acid.
A MORE reactive metal can also displace the ion of a LESS reactive metal from the solution.
A less reactive metal can be displaced by a more reactive metal (one that produces positive ions more readily). An example of this is a displacement reaction.
The more reactive metal thus enters the solution as a cation, while the cations of the less reactive metal are changed into metal. In their salt solutions, more reactive metals thus displace less reactive metals.
Only when a metal is situated above another metal in the reactivity series may one metal remove another metal from a complex.
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The density of mercury, the only metal to exist as a liquid at room temperature, is 13. 6 g/cm3. what is that density in pounds (lb) per cubic inch? (1 in = 2. 54 cm; 1 lb = 454 g)?
The density of mercury in pounds per cubic inch is 0.49 lb/in³.
Mercury is the only metal that exists in liquid form. The density of mercy is 13.6 g/cm³. It's one of the essential application is in thermometers, especially the ones used in chemistry labs. It is used to measure the temperature of various things. As with the increase in temperature, the mercury present inside the thermometer also increases.
The density of the mercury = 13.6 g/cm³.
1 lb = 2.54 cm
1 lb = 454 g
The density of the mercury in pounds per cubic inch is,
[tex]13.6 \frac{g}{cm ^{3} } = 13.6 \frac{g}{cm ^{3} } \times \frac{1 \: lb}{454 \: g } \times ({ \frac{2.54}{1 \: in} } ) {}^{3} [/tex]
[tex]13.6 \frac{g}{cm ^{3} } \times \frac{1 \: lb}{454 \: g } \times ({ \frac{2.54 {}^{3} \: cm ^{3} }{1 ^{3} \: in ^{3} } } )[/tex]
= 0.49 lb/in³
Therefore, the density of mercury in pounds per cubic inch is 0.49 lb/in³.
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two atoms have a chemical bond between them. neither of the atoms is hydrogen. each of the atoms has a partial charge. what kind of chemical bond is it?
Chemical Bonding : The molecules are usually categorized into two categories depending on the bonding and the bonding are classified into ionic bonds and covalent bonds.
Other comes under wander vall interactions.
If the molecular atoms are not hydrogen atoms then it must shares polar covalent bond , it is defined as the distribution of electrons unequally (that means one have partial charges considered both positive and negative.
The main reason behind the distribution of electrons in any atom is the electronegativity. It determines the distribution of of the shared electrons in the middle of two atoms in a polar covalent bonding.
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If a dextrose solution had an osmolarity of 100 mosmol/l, what percentage (w/v) of dextrose (mw = 198. 17) would be present?
w/v percentage of a dextrose solution with an osmolarity of 100 mosmol/L would be 1.9817%.
Because dextrose does not disassociate in an aqueous solution, the osmolarity of the solution is equal to its molarity, so we have a 100 mmol/L (or 100 mM or 0.1 M) dextrose solution. That means that, in 100 mL (0.1 L) of this solution, we have:
c = n/V, so n = c x V = 0.1 M x 0.1 L = 0.01 mol
n = m/M, so m = n x M = 0.01 mol x 198.17 g/mol = 1.9817 g of dextrose
w/v percentage would be:
100% x 1.9817 (g) / 100 (mL) = 1.9817%
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What does Resources that control the size a population can reach are known as? Mean I need to study for a test
Answer: What does Resources that control the size a population can reach are known as? a limiting factor
Explanation: A limiting factor is anything that constrains a population's size and slows or stops it from growing. Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources.
Substance x is a molecular compound and is not an acid nor a base. based just on this information, what can you determine about substance x?
Substance x is a molecular compound and is not an acid or a base. The substance x is not an electrolyte.
What are molecular compounds?Molecular compounds are compounds that are formed by the sharing of electrons between atoms. They are also known as covalent compounds. They are of two types:
Polar covalent compound: When there is a difference in the electronegativity of the atoms, this compound is formed. A polar covalent bond is created when atoms of different elements come together. For Example NO₂ Non-polar covalent compound: This compound is formed when there is no difference in electronegativity between the atoms. A non-polar covalent bond is created when atoms of the same element come together. For Example O₂Like dissolves like, as we are all aware. As a result, polar solvents dissolve polar molecules, while non-polar solvents dissolve non-polar molecules.
A polar compound is water. Therefore, it will only dissolve polar molecules.
A molecular compound is the provided chemical, "X." It could be non-polar or polar.
Therefore, it might or might not be soluble in water.
When a substance is dissolved in water, it conducts electricity and is referred to as an electrolyte. Because of the ions, they separate into, they conduct electricity.
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The complete question is:
"Substance X is a molecular compound and is not an acid nor a base. Based just on this information, what can you determine about substance X? Check all that apply.
(A) X is soluble in water.
(B) X is insoluble in water.
(C) X is an electrolyte.
(D) X is not an electrolyte."
100 km/hr = ? m/sec
Please help me !
Answer:
27.78
Step by Step:
100 x 1000 = 100000
100000 / 3600 = 27.77777778 m/s
Sulphur is the element represented in the diagram. If protons are represented by subatomic particle X, what is subatomic particle Y, the other type of particle in the nucleus?
Answer: It will be C. neutron.
Explanation:
Question 1
Dull, brittle and non conductive best describes which of the following:
Mg
OPd
O Fe
S
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A nonmetal is a chemical element that doesn't have a lot of metallic characteristics; examples include colourless gases (like hydrogen) and glossy, solids with high melting points (like boron).
Dull, brittle and non conductive best describes which of the following:
MgPdFeS"S - Sulfur"
A Non-metallic Chemical element sulfur has the letter S and atomic number 16. It is multivalent, nonmetallic, and plentiful. Sulfur atoms normally combine to create cyclic octatomic molecules, which have the chemical formula S8. At room temperature, elemental sulfur is a crystalline solid that is brilliant yellow.
When compared to metals, nonmetals' electrons exhibit different behaviour. With a few exceptions, nonmetals don't have any moving parts, which makes them often poor heat- and electricity-conductors and brittle or crumbly when solid. Metals are good conductors since their electrons are typically free to move about, and the majority of them are also simple to flatten into sheets and draw into wires. Nonmetal atoms have varying degrees of electro negativeness, which makes them more likely to draw electrons in chemical processes and produce acidic compounds.
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you are making a solution of sodium chloride for an experiment in the lab. you are instructed to add 250 mg of sodium chloride to 500 ml of lab water. determine the sodium chloride concentration of the solution in units of mg/l, ppm, and state your assumptions.
Making a solution of sodium chloride for an experiment , we add 250 mg of sodium chloride to 500 ml of lab water. the sodium chloride concentration of solution in unit of mg/l is 499.7 mg/l and in ppm is 499.7 mg/l.
mass of solute = 250 mg = 0.250 g
volume of solvent = 500 ml = 500 g
mass of solution = 0.250 g + 500 g = 500.25 g
concentration of solution in ppm ( parts per million ).m
= ( mass of solute in g / mass of solution in g ) × 1000000
= ( 0.250 g / 500.25 g) × 1000000
= 499.7 ppm
so, we know that , 1 ppm is equivalent to 1 mg /l
1 ppm = 1 mg/l
Therefore, 499.7 ppm = 499.7 mg / l.
thus,Making a solution of sodium chloride for an experiment , we add 250 mg of sodium chloride to 500 ml of lab water. the sodium chloride concentration of solution in unit of mg/l is 499.7 mg/l and in ppm is 499.7 mg/l.
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Help someone ASAP!! Giving Brainliest!!!
1. Which element is a transuranium element?
A. thorium
B. einsteinium
C. erbium
D. neodymium
B. Einsteinium
Transuranium elements are the elements after the number 92 in the periodic table.
what causes particles to vibrate or move around more?
please answer these questions on Strong acids and weak acids.
The identification of more than 3,000 genetic diseases is possible with the new knowledge of the human genome. Because of that, _____ should obtain genetic testing.
Answer:
i think it might be diseased people. but im not sure
Explanation:
a 17.90 gram sample of iron is heated in the presence of excess iodine. a metal iodide is formed with a mass of 99.24 g. determine the empirical formula of the metal iodide.
A17.90-gram sample of iron is heated in the presence of excess iodine a metal iodide is formed and the empirical formula of the compound is Fe1I2.
What is the Empirical formulaThe empirical formula, which is defined as the ratio of subscripts of the least whole number of the elements present in the formula, is the simplest formula for a compound.
Mass of Fe= 17.90 g
Mass of metal iodide = 99.24 g
Now we have to calculate the mass of iodide.
Mass of I = Mass of metal iodide - Mass of Fe
Mass of I = 99.24 - 17.90
Mass of I = 81.34 g
To formulate the empirical formula, we need to follow some steps:
First, we convert the given masses into moles.
Moles of Fe = Given mass/ molar mass = 17.90/55.93 = 0.32 moles
Moles of I = given mass/ molar mass = 81.34/126 = 0.64 moles
To calculate the mole ratio, we divide each value by the smallest number of moles that is 0.32 moles.
For Fe = 0.32/0.32 = 1
For I = 0.64/0.32 = 2
Hence the mole ratio is
Fe:I = 1:2
Thus, the empirical formula would be Fe1I2
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which is more important: pollution prevention on pollution clean up? Explain
Answer:pollution clean
Explanation: pollution clean up can help evert damages that have yet to be done while pollution cleanup can't rever the effects it has already done
A scientist tests a small section of a carrot root to determine which molecules were present. the basic results showed that the molecules contained carbon, hydrogen and oxygen, with some arranged in a ringed pattern, providing structure and energy to the root. what inference can be made from this data? (b.9a) question 19 options: the molecules are a type of carbohydrate the carrot root is mainly composed of proteins the carrot contains some type of sugar both a and c are correct
The correct answer is option D) Both A and C are correct.
Carbohydrates are the hydrate of carbon and they are large macromolecules made of carbon (C), hydrogen (H), and oxygen (O). They can be found as starch, cellulose, and sugars in food and living tissues.
Carrots also produce natural sugar, which provides energy for the plant to reproduce. This sugar is then delivered to the storage organs of carrots (the root). Then the sugar is transformed into starch because starch is non-soluble and hence it is easier to store it.
However, when plants need energy, this starch is converted back into sugar by the activity of an enzyme. Depending on how much sugar is still available, carrots and similar plants vary in sweetness.
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A scientist tests a small section of a carrot root to determine which molecules were present the basic results showed that the molecules contained carbon hydrogen and oxygen with some arranged in a ringed pattern providing structure and energy to the root what inference can be made from this data?
A) The molecules are a type of a carbohydrate
B) The carrot root is mainly composed of proteins
C) The carrot contains some type of sugar
D) Both A and C are correct
Someone help me pleaseeeee I’m giving brainlest
Answer: they were all used a very long time ago and there paper
Explanation: