HELPPPPP!!!!
Describe the properties of alkaline earth metals. Based on their electronic arrangement, explain whether they can exist alone in nature.

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 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:

"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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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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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.

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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The equation of state for a hypothetical ideal gas is known as the ideal gas law, sometimes known as the general gas equation. i.e. PV = nRT or P1V1 = P2V2.

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Based on the mass and volume of the copper, the density of copper is 8.92 g/cm³.

The density of a substance is the ratio of the mass of that substance and the volume of the substance.

mathematically:

From 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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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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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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The changes that are common between sauce burning on a stove, and jewelry tarnishing, which is a chemical change.

How to define chemical and physical changes?

Chemical Change-

Any alteration that produces new chemical substances with distinct properties is considered a chemical change. Chemical reactions involve the rearrangement and recombination of elements and compounds to create new substances. Examples of chemical changes are listed below:

Physical Change-

A substance is not destroyed or transformed into something new by physical changes. A substance can undergo physical changes that alter its shape, size, or phase. The constituents of an element or compound do not change during a physical change. Examples of physical changes are listed below:

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Answer: they were all used a very long time ago and there paper

Explanation:

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.

The 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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Answer: It will be C. neutron.

Explanation:

Answer:

When electrons are lost by one atom and gained by another atom

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

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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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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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?

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The percent abundance for Fe-57 in the attached photo if the average atomic mass for Fe is 55.845 u is 2.1%.

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;

3.153 + 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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Answer:

Mm(2MgO)=2×24+16

=64

=

Explanation:

2

The mole idea is a useful way to indicate how much of a substance there is. The numerical magnitude and the units can be separated into two components to represent any measurement. The moles of magnesium is 0.012.

Even one gram of a pure element is known to have an enormous number of atoms when working with particles at the atomic (or molecular) level. The mole idea is frequently applied in this situation. It largely concentrates on the thing called a "mole."

The expression used to calculate the moles is:

n = Mass / Molar mass

The molar mass of MgO = 40.30 g/mol

n = 0.486 / 40.30

n = 0.012

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Answer:

i think it might be diseased people. but im not sure

Explanation:

Substance x is a molecular compound and is not an acid or a base. The substance x is not an electrolyte.

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:

Like 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."

The pie chart is the graphical representation of data. The given pie diagram is showing the content of different elements in the figure.

The pie chart is the graphical representation of data. In the given pie chart elements are given in the information.

Therefore, The pie chart is the graphical representation of data. In the given pie chart elements are given in the information.

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Answer:

    2. 8%

    3. 2%

    4. 4%

    5. 46%

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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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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Answer:

27.78

Step by Step:

100 x 1000 = 100000

100000 / 3600 = 27.77777778 m/s

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: