which of the following questions can be answered by science?

Explanation:

K+ ion has 18 electrons and Argon also has 18 electrons so they do have the same electronic structure.

However, Al3+ ion has 10 electrons and Argon has 18 electrons, so they do not have the same electronic structure.

Answer:

All unauthorized experiments are prohibited. You are allowed to enter the chemical preparation/storage area any time you need to get an item. Laboratory aprons should be worn during all lab activities. It's okay to pick up broken with our bare hand as long as the glass is placed in the trash.

Explanation:

Answer:

Explanation: Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material. Filtration separates solids of different sizes.

The technique(s) that can be used to remove one solid from a mixture of solids is chromatography.

On a solid medium, chromatography uses solvent separation. Different boiling points are used in distillation.

A liquid is removed through evaporation from a solution to leave a solid behind. Different-sized particles are divided using filtration. Additionally, it can be employed as a purification method to separate a mixture's constituent parts for use in other operations or studies.

There are four main types of chromatography.

Therefore, Chromatography is one or more of the methods that can be used to separate a single solid from a mixture of solids.

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Answer:

protons, nuetrons, electrons

Explanation:

compounds and electrons are made up of atoms.

Answer:

protons, nuetrons, electrons

Explanation:

Answer:

The equilibrium temperature of the system is 276.494 Kelvin.

Explanation:

Let consider the system formed by the sample of aluminium and water as a control mass, in which the sample is cooled and water is heated until thermal equilibrium is reached. The energy process is represented by First Law of Thermodynamics:

[tex]Q_{water} -Q_{sample} = 0[/tex]

[tex]Q_{water} = Q_{sample}[/tex]

Where:

[tex]Q_{water}[/tex] - Heat received by water, measured in joules.

[tex]Q_{sample}[/tex] - Heat released by the sample of aluminium, measured in joules.

Given that no mass is evaporated, the previous expression is expanded to:

[tex]m_{w}\cdot c_{p,w}\cdot (T-T_{w}) = m_{s}\cdot c_{p,s}\cdot (T_{s}-T)[/tex]

Where:

[tex]m_{s}[/tex], [tex]m_{w}[/tex] - Mass of water and the sample of aluminium, measured in kilograms.

[tex]c_{p,s}[/tex], [tex]c_{p,w}[/tex] - Specific heats of the sample of aluminium and water, measured in joules per kilogram-Kelvin.

[tex]T_{s}[/tex], [tex]T_{w}[/tex] - Initial temperatures of the sample of aluminium and water, measured in Kelvin.

[tex]T[/tex] - Temperature which system reaches thermal equilibrium, measured in Kelvin.

The final temperature is now cleared:

[tex](m_{w}\cdot c_{p,w}+m_{s}\cdot c_{p,s})\cdot T = m_{s}\cdot c_{p,s}\cdot T_{s}+m_{w}\cdot c_{p,w}\cdot T_{w}[/tex]

[tex]T = \frac{m_{s}\cdot c_{p,s}\cdot T_{s}+m_{w}\cdot c_{p,w}\cdot T_{w}}{m_{w}\cdot c_{p,w}+m_{s}\cdot c_{p,s}}[/tex]

Given that [tex]m_{s} = 0.380\,kg[/tex], [tex]m_{w} = 2.40\,kg[/tex], [tex]c_{p,s} = 910\,\frac{J}{kg\cdot K}[/tex], [tex]c_{p,w} = 4186\,\frac{J}{kg\cdot K}[/tex], [tex]T_{s} = 378\,K[/tex] and [tex]T_{w} = 273\,K[/tex], the final temperature of the system is:

[tex]T = \frac{(0.380\,kg)\cdot \left(910\,\frac{J}{kg\cdot K} \right)\cdot (378\,K)+(2.40\,kg)\cdot \left(4186\,\frac{J}{kg\cdot K} \right)\cdot (273\,K)}{(2.40\,kg)\cdot \left(4186\,\frac{J}{kg\cdot K} \right)+(0.380\,kg)\cdot \left(910\,\frac{J}{kg\cdot K} \right)}[/tex]

[tex]T = 276.494\,K[/tex]

The equilibrium temperature of the system is 276.494 Kelvin.

Answer:296

Explanation:

I got it right :) and mark me brainlest please

SUCROSE IS A NATURALLY OCCURRING SUGAR, COMMONLY KNOWN AS TABLE SUGAR. SUCRALOSE, ON THE OTHER HAND, IS AN ARTIFICIAL SWEETENER, PRODUCED IN A LAB.....

HOPE IT HELP.....☺☺☺

Answer: 4.8 grams of hydrogen is 2.4 moles, and 38.4 grams of oxygen is 1.2 moles. This is exactly the Stoichiometry ratio of the reaction, therefore the two will both completely react giving rise to the same total mass of water.

Answer:

1.35×10¹² μg

Explanation:

Mass (Kg) = 1350 Kg

Mass (μg) =?

Thus, we can obtain the mass of the adult rhino in micrograms (μg) by converting 1350 Kg to microgram (μg) as follow:

1 Kg = 1×10⁹ μg

Therefore,

1350 Kg = 1350 kg / 1 kg × 1×10⁹ μg

1350 Kg = 1.35×10¹² μg

Therefore, 1350 Kg is equivalent to 1.35×10¹² μg.

Answer:

To convert 1350 kilograms to micrograms, we need to multiply by a conversion factor that takes us from kilograms to micrograms.

1 kilogram = 1,000,000,000 micrograms (by definition)

So,

1350 kilograms = 1350 x 1,000,000,000 micrograms

= 1.35 x 10^12 micrograms (in scientific notation)

Therefore, the mass of an adult rhino is 1.35 x 10^12 micrograms.

Answer:

The scientific method attempts to minimize the influence of bias or prejudice in the experimenter. Even the best-intentioned scientists can't escape bias. ... That's the job of the scientific method. It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results.

Explanation:

The Scientific Method is simply a framework for the systematic exploration of patterns in our world. It just so happens that this framework is extremely useful for the examination of chemistry and its many questions.

Explanation:

10ml = Volume of water

14ml = Volume of water + Volume of marble

Therefore the volume of the marble is 4ml.

The volume of water is 10 ml and the total volume of the cylinder is 14 mi, then the volume of the marble is 4ml.

Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.

The basic formula for volume is length, breadth, and height, as opposed to length, width, and height for the area of a rectangular shape. The calculation is unaffected by how you refer to the various dimensions; for instance, you can use "depth" instead of "height."

Volume is a unit used to describe how much space a substance takes up. A physical material with mass and space-occupying properties is referred to as matter. The usual measurement of volume in physical sciences like chemistry is in cubic meters (m3).

The volume of water is 10 ml

Volume of water + Volume of marble

=14 ml

Thus, the volume of the marble is 4ml.

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Answer:

d

Explanation: i think

Answer:

Proton number of the supposed discovery debunked the theory.

Explanation:

Proton number of an element is also its atomic number.

For the element in question to have had a proton number that wasn't 119, it could not have been a new element.

Furthermore, the characteristics described (proton number especially) describe exactly the Germanium element.

I believe this was helpful.

Answer:

Density=mass / volume.

0.820=mass /57.1.

mass=0.820×57.1

=46.822g.

Answer:

The 3 elements that has 3 electrons are:

Li, Be+ and B2+

Explanation:

Hoped that helped :)

Answer:

1.10 g/mL

Explanation:

The amount of volume an object displaces is the amount of volume that object takes up.

7.87 - 1.67 = 6.2

The object has a volume of 6.2 mL.

You have the mass (6.82 g) and the volume (6.2 mL).  Divide the two value to find the density.

(6.82 g)/(6.2 mL) = 1.10 g/mL

The density of the object is 1.10 g/mL.

Answer:

Explanation:

Hello! To begin, remember Avogadro's number, 6.02*10^23 molecules!

You take your number of Ar atoms and divide it by Avogadro's number:

[tex]\frac{1.63 * 10^{24} Ar atoms}{6.02 * 10x^{23} }[/tex] = 2.7076412 moles...

round to 3 sig dig's (based on "1.63")

Final answer = 2.71 moles Ar

Answer:

Only ask one question

Explanation:

Answer:

2.15-1.85=0.3.

so therefore.

0.3/2.15×100

=13.953 ~ 14.

Answer:

2

Explanation:

The last zeros don't count because there is no decimal. So only 2,4 are left over. Counting them gives us 2 digits. So 2.

Answer:

1x 10⁴ m or 1000 meters

Explanation:

1 hectometer = 100 meters

10 hectometers = 10 x 100 meters = 1000m

or in scientific form = 1 x 10⁴

Answer:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Explanation:

hope that helps

Answer:

the answer will be protons neutrons and electrons:)

Explanation:

Answer:

5.   the total density of the mixture = 3.415 x 10^3 g/mL

6.  the number of sulfur atoms in the compound =  2 x 10^24

Explanation:

5.

given:

density of a substance is 3.4 x 10^3 g/mL

Mixing it with another substance increases the density by 1.5 x 10^1 times.

find:

What is the density of the mixture?​

-------------------------------------------------

let density (a) = 3.4 x 10^3 g/mL

density(b) = 1.5 x 10^1 g/mL

since there is no specific density provided for the mixture, we then add both to increase the density,

total density = density(a) + density(b)

total density = 3.4 x 10^3 g/mL + 1.5 x 10^1 g/mL

total density = 3.415 x 10^3 g/mL

therefore,

the total density of the mixture = 3.415 x 10^3 g/mL

===============================================

6.

given:

A compound contains atoms of sulfur and iron.

There are 3.6 X 10^20 atoms of iron in the compound.

find:

Divide the no of iron atoms by 1.8 X 10^- 4 to find the number of sulfur atoms in the compound?​

-------------------------------------------------

iron = 3.6 x 10^20  ⇒ to divide 1.8 X 10^- 4

sulfur atoms = 3.6 x 10^20    =  2 x 10^24

                         1.8 X 10^- 4

therefore,

the number of sulfur atoms in the compound =  2 x 10^24

===================================================

Answer:

5.   the total density of the mixture = 3.415 x 10^3 g/mL

6.  the number of sulfur atoms in the compound =  2 x 10^24

Explanation:

i got them correct on exam

Answer:A bow and arrow possesses mechanical energy. When the arrow is drawn it has potential energy and when it is released it produces a force to propel the arrow towards the aimed target, therefore giving the arrow kinetic energy. When you combine both energies it creates mechanical energy.

Explanation:

Answer:

Building up potential energy when pulling it back

Explanation:

Answer:

ill say a

Explanation:

it make the most cense

They can only be monoatomic.

Nearly all elements form monatomic gases at extremely high temperatures or when exposed to enough radiation because there's too much kinetic energy for bonds to form or the energy breaks chemical bonds between atoms.

There are seven diatomic elements given below

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Explanation:

Gas prices in the U.S. are given by the gallon; to convert them to liters, you'll divide the price by the number of liters in a gallon, 3.78541. So if gas costs $3.50 per gallon, you have $3.50 ÷ 3.78541 = $0.92460 per liter, which would typically be rounded to $0.92 per liter.

Answer:

See the answer below

Explanation:

The best approach would be to pour the liquid from the large reagent bottle into a small-size beaker or reagent bottle first, before measuring the required quantity out into the reaction vessel. This is necessary in order to maintain safety in the laboratory.

Pouring the liquid directly from the large reagent bottle into the measuring cylinder or directly into the reaction bottle can compromise safety in the laboratory. The liquid might splash out and cause harm to the handler or create other harmful circumstances in the laboratory.

The information regarding the liquid should be explained below;

The following information should be considered;

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Answer:

are a result of hydrogen bonding.

Explanation:

The surface tension is the amount of energy required to stretch or increase the surface of a liquid by a unit area. Liquids that have strong intermolecular forces also have high surface tensions. Thus, because of hydrogen bonding, water has a considerably greater surface tension than most other liquids.

Another example of surface tension is capillary action. A thin film of water adheres to the wall of the glass tube. The surface tension of water causes this film to contract, and as it does, it pulls the water up the tube. Two types of forces bring about capillary action.

One is cohesion, which is the intermolecular attraction between like molecules (in this case, the water molecules). The second force, called adhesion, is an attraction between unlike molecules, such as those in water and in the sides of a glass tube. If adhesion is stronger than cohesion, the contents of the tube will be pulled upward. This process continues until the adhesive force is balanced by the weight of the water in the tube.

This characteristics of water are a consequence of a particularly strong type of intermolecular attraction, called the hydrogen bond, which is a special type of dipole-dipole interaction between the hydrogen atom in a polar bond, such as N-H, O-H, or F-H, and an electronegative O, N, or F atom.

Answer:

0.00013

Explanation:

I'm pretty sure. I first subtracted 1.87 from 2. I got 0.13. The conversion from mL to L is 0.001. I multiplied 0.13 and 0.001 and got 0.00013 mL.