How do you do conversion factors?

Answer:

The outermost (valence) shell of argon has eight electrons, making it exceedingly stable and, thus, chemically inert. Argon atoms do not combine with one another; nor have they been observed to combine chemically with atoms of any other element.So argon is an inert gas

Answer:

because argon have 8 electrons in there outmost shell

which is enough to make it stable

Answer:juhygjdkeExplanation:

Mendelevium is named for Dmitri Mendeleev who produced one of the first periodic tables.

Abelson first found neptunium in 1940 after uranium had been bombarded by neutrons from the cyclotron at Berkeley, California. ... The element was named after the planet Neptune, which is the first planet beyond Uranus.

Answer in explanation

Explanation:

neptunium was named after the discovery of the planet neptune in september 23 1846

mendelevium was named as dimitri mendeleev

Answer:

(a)572.2ml

(b)54000cm

Explanation:

(a) 1 l = 1000 ml

0.5722 l =?

=572.2 ml

(b) 1m = 100cm

540m=?

=54000cm

The various units like liter, meter, and kilogram are used to measure the objects and matter. 0.5722 L is equivalent to 572.2ml and 540.0 m is equivalent to 54000cm.

Unit of measurements are magnitudes used to estimate the quantity of the matter and includes seven fundamental units, including meter, kilogram, seconds, candela, mole, kelvin, and ampere.

The fundamental units can be used to define other measurements that are called derived units, like volume, density, etc. The unit can be converted into various metric systems.

Unit conversions are done as:

0.5722 L = X mL

X = (0.5722 L × 1000 mL) ÷ 1 L

= 572.2 mL

540 m = X cm

X = (540 m × 100 cm) ÷ 1 m

= 54000cm

Therefore, 0.5722 L = 572.2 mL, and 540.0 m = 54000 cm.

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Answer:

The correct choice is option b. ethanol < Mg(NO3)2 < NaCl

Explanation:

Ethanol = 0.100 m

Mg(NO3)2 = 0.15 m

NaCl = 0.18 m

The molar concentration of NaCl is the highest, which is why its boiling point will be the highest, too.

Answer:

Sodium hydrogen sulphite

Explanation:

The white precipitate formed is because of the sulphite ion and a carbonyl group formed

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The unit that is equivalent to 75g is 0.075 kg, 750 dg, and 7.5 dag. The correct options are b, c, and d.

Measuring units are the units used to denote the measurement quantities. There are seven basic measuring units. They are length, Time, Amount of substance, Electric current, Temperature, Luminous intensity, and Mass.

The current unit is given grams, which are used to measure the mass of any object.

1000 grams is equal to 1 kilogram and 1 dg = 0.1 g, and 1 dag = 10 g. So by this formula, each of the quantities can be calculated.  

1 kg = 1000 g

So, 0.075 kg = (0.075 × 1000)g = 75 g

1 dg = 0.1 g

So, 750 dg = (750 × 0.1) g = 75 g

1 dag = 10 g

So, 7.5 dag = (7.5 × 10) g = 75 g

Thus, the correct options are b. 750 dg, c. 7.5 dag, and d. .075 Kg.

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Answer:

a) MgCl2

b) CaO

c) Al2O3

2)A chemical equation is the symvolic representation of a chemical reactionary in the form of symbol and formulae, wherein the reactants entities are given on the left hand side and the product entities on the right hand side.

3) ammonia sulfate- NH4

carbonic acid- H2CO3

sodium bicarbonate- NaHCO3

sodium hydroxide- NaOH

nitric acid- HNO3

ethanol- C2H5OH

methane- CH4

sodium nitrate- NaNO3

aluminium oxide- Al2O3

citric acid- C6H8O7

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Answer:

Answer:

When an element is oxidized, it loses electrons

Answer:

The last option is the correct answer.

Explanation:

When an element is oxidized, it loses electrons. But when an element is reduced, it gains electrons. This is the basis of redox reactions.

However, an oxidizing agent oxidizes something else, and gets reduced, therefore gaining electrons. Meanwhile, a reducing agent reduces something else, and gets oxidized in the process, losing its own electrons.

Answer: 3 cm

Explanation:

The relative standard deviation for the set of data obtained by the student is 0.470%

The formula for calculating the relative standard deviation is given below as:

Relative standard deviation (RSD) = (S * 100)/x

where S stands for the standard deviation and x is the mean of the data set.

The following are the steps to calculate to determine the relative standard deviation using the given formula:

Step 1: Calculate the mean of the numbers in the data set.

mean, x = sum of numbers / number of numbers

(40.220 + 40.654 + 40.314 + 40.165 + 40.554)/5

mean = 40.381 g/mol

Step 2: Subtract the mean from each number in the data to determine the deviation for each number and then square the deviations.

(40.220 - 40.381)² = 0.0259

(40.654 - 40.381)² = 0.0745

(40.314 - 40.381)² = 0.00449

(40.165 - 40.381)² = 0.0466

(40.554 -40.381)² = 0.0299

Step 3: Sum the squared deviations.

0.0259 + 0.0745 + 0.00449 + 0.0466 + 0.0299 = 0.181

Step 4: Determine the variance by dividing the sum of the squared deviations by the total number of values.

Variance = 0.181/5 = 0.0362

Step 6: Determine the standard deviation of the data by taking square root of the variance.

Standard deviation, S = √0.0362 = 0.190

Step 7: Determine the relative standard deviation by inserting the values in the formula, (RSD) = (S * 100)/x

RSD = (0.190 * 100)/40.381

RSD = 0.470%

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Answer:

Chelate, any of a class of coordination or complex compounds consisting of a central metal atom attached to a large molecule, called a ligand, in a cyclic or ring structure. An example of a chelate ring occurs in the ethylenediamine-cadmium complex:

The ethylenediamine ligand has two points of attachment to the cadmium ion, thus forming a ring; it is known as a didentate ligand. (Three ethylenediamine ligands can attach to the Cd2+ ion, each one forming a ring as depicted above.) Ligands that can attach to the same metal ion at two or more points are known as polydentate ligands. All polydentate ligands are chelating agents.

Chelates are more stable than nonchelated compounds of comparable composition, and the more extensive the chelation—that is, the larger the number of ring closures to a metal atom—the more stable the compound. This phenomenon is called the chelate effect; it is generally attributed to an increase in the thermodynamic quantity called entropy that accompanies chelation. The stability of a chelate is also related to the number of atoms in the chelate ring. In general, chelates containing five- or six-membered rings are more stable than chelates with four-, seven-, or eight-membered rings.

Explanation:

Answer:

b

Explanation:

well I really don't remember but I think it's b

Mass is a measure of inertia

The variable that affect mass of a body is the amount of matter present in the body

The reason for arriving at the above statement is as follows:

Mass is the property of a body that indicates the quantity of matter contained in the body and also a measure of the body's resistance to acceleration

In an experiment to determine the variables that affect mass, using a weight balance and paper clips, the observation is that as the quantity of the paper clips are increases on one side of the balance, the balance tilts lower on the side bearing the larger number of paper clips indicating a larger mass

Therefore, the variable that affect mass is the quantity of matter (material) present

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Answer:

A) 14,500 kPa

B)  6 atm

C)  23.443 atm

D)  898.6  mmHg

Explanation:

Density is simply defined as the mass per unit volume of a substance. Mathematically, it is expressed as:

[tex]Density = \frac{mass}{volume }[/tex]

To solve the question given above, we'll begin by calculating the volume of the metal. This can be obtained as follow:

Volume of water = 25 mL

Volume of water + metal = 46.5 mL

Volume of metal = (Volume of water + metal) – (Volume of water)

Volume of metal = 46.6 – 25

Finally, we shall determine the density of the metal. This can be obtained as follow:

Mass of metal = 254 g

Volume of metal = 21.5 mL

[tex]Density = \frac{mass}{volume }\\\\Density = \frac{254}{21.5} \\[/tex]

Therefore, the density of the metal is 11.81 g/mL

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Answer:

answer of first question is Chlorine

answer of second question is Group 14

Answer:

Ultraviolet radiation is a form of electromagnetic radiation that comes from the sun.

Answer:

A. 4

Explanation:

We know that Tommy purchased a 2 liter bottle, in which pours 500ml of said bottle in cups, following asked of how many cups would he need before finishing the soda.

First off, 1 liter is 1,000 millileters, therefore that dividing a two liter bottle (2000ml) by 500ml will give us our answer :

2000/500

A. 4

Answer:

(from largest to smallest), macroscopic, microscopic, submicroscopic.

Explanation:

Explanation:

The correct order of these from largest to smallest is macroscopic, microscopic, and submicroscopic.

Macroscopic is a term used for things that can be easily seen by the eyes. They are of large size. Macroscopic are those items like rubber, mountains, a bottle, etc.

Microscopic items are those items that are minimum in size and can not be seen by eyes. They are seen by using microscopes. They are microorganisms, cells, cell organelle, etc.

Submicroscopic matters are those objects or substances that made up matter. They are present but can not be seen by eyes. They are electrons, protons, etc. so the correct order of them according to largest to smallest is macroscopic, microscopic, and submicroscopic.

Thus, the correct order is macroscopic, microscopic, and submicroscopic.

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The first quarter moon occurs halfway between new moon and full moon.

From our perspective, the moon is partially lighted and is 90 degrees away from the sun in the sky.

We refer to it as the "first quarter" since the moon has only circled the Earth once since the new moon.

From Earth, you can view one-quarter of the moon, or half of the moon's illuminated side, which seems to be one-half of a pie.

Therefore, The first quarter moon occurs halfway between new moon and full moon.

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Answer:

Explanation:

As technology advances with time, it also enhances people's creativity. ... People are able to constantly search things and discover new information they didn't know before. It allows us to become educated and have an outlet to speak our mind

Answer:

Jowhwbeejwieiebbej sssie ksihejwiiwb isjbeiis

Answer:

3.50 mol x 6.022 x 10^23

= 2.11 x 10^24 carbon atoms

Explanation:

1. moles = grams/molar mass

2. (mass nitrogen/mass amm sulfide)*100 = ??

3. mass Hg = volume x density

Then convert to moles.

Then remember there are 6.022E23 atoms for every mole.

Answer:  60 g/mban

Explanation:  I don't know what an "mban" is, but the density of this alien rock would be 60 grams/mban.  Density = Mass/Volume

Explanation:

One mole of NaOH weighs 40gm.

Now 2M solution of NaOH indicates 2 moles of NaOH in 1 litre of water.

So the above question can now be simplified as …if one litre of water contains 80gm(2 moles) of NaOH, then how many grams of NaOH would 250ml solution of the same contain?

Using unitary method,

1000ml corresponds to 80gm NaOH…

1000/4 ml(250ml) corresponds to 80/4 gm NaOH…

Therefore, for 250ml of 2M NaOH, 20 gm of NaOH needs to be added to water.