What do you notice about the names of the cations and anions on the cards. How do they compare with the name of the neutral atom or element? Do the non-metals have anything in common about their name?

Regina conducted an investigation to determine whether earthworms add nutrients to soil. she used two pots of soil. she added three earthworms to the first pot. she did not add any earthworms to the second pot, which was the control. Regina tested the nutrient levels of the soil in both pots after two weeks. The type of investigation is Regina conducting is experimental.

Experimental study is a quantitative method of research which allows to visualize the effects of variable change by keeping other variables in control. These involve random experimental control.

There is an independent variable, a dependent variable and a set up which is meant for control in an experimental study. The control is to establish the validity of the experimental study.

Experiments creates the cause and effect relationship. This experiment was designed to know whether the earthworms add any nutrient to the soil.

To learn more about experiments,

brainly.com/question/28220250

#SPJ1

The empty glassware might heat quickly, igniting vapors from the distillation is the concerns presented by overheating a distillation to a dry flask.

To learn more about overheat the distillation refer to

https://brainly.com/question/24419453

#SPJ4

Answer:

57.6g

Explanation:

1u=28.8g

2u=28.8g×2

.....=57.6g

Element of first triads with similar properties are : calcium , strontium and barium are in increasing order of atomic mass.

A triad is a grouping of three elements organized according to increase in atomic mass.

Dobereiner stated his law of triad as  : " airthmatic mean of atomic masses of first and third element would be equal to atomic mass of second element".

The first triad of dobereiner was introduced as : calcium , strontium  and barium.

In this triad, the airthmatic mean of calcium and barium is exactly same as that of strontium.

therefore , according to this the properties of middle element lie in between first and third element.

To learn more about triads  here

https://brainly.com/question/17984569

#SPJ4

Answer:

Identified triads of elements with similar properties:

✔ Dobereiner

Organized elements according to increasing atomic mass:

✔ Mendeleev

Explanation:

Ed22

Number of moles of sodium nitride, NaN₃ needed to produce 3.94 moles of Nitrogen, N₂ is 2.63 moles

Decomposition of sodium nitride is

NaN₃ → Na + N₂

On balancing the given reaction we need to add the necessary coefficients behind the reactants and products

2NaN₃ → 2Na + 3N₂

So, 2 moles of NaN₃  is needed to form = 3 moles of N₂

or 3 moles of N₂ is produced from = 2 moles of NaN₃

1 mole of N₂ is produced from = 2/3 moles of NaN₃

3.94 moles of N₂ of produced from = 3.94 x 2/3 moles of NaN₃

                                                            = 2.63 moles of NaN₃

To know more about moles here

https://brainly.com/question/26416088

#SPJ1

12.5 mL of 0.400M solution of HCL has the same number of moles of HCL as 25.0 ml of 0.200m solution of HCL.

A unit of measurement for substance amount is the mole. We have a reliable way to translate between atoms/molecules and grams by moles. Molecules can be expressed in terms of volume, the number of atoms or molecules, and molecular mass. A pure material has a molecular mass in grams that are equivalent to 1 mole of that substance.

Multiplying the volume in L by the molarity in mol/L gives moles of HCL

25.0 mL(1L/1000 mL)(0.200mol HCL/1L)

=0.00500 mol HCL in the solution.

For each answer choice, perform the same calculation to identify the correct match.

12.5mL(1L/1000mL)(0.400 mol HCL/1L)

=0.00500 mol HCL

The correct answer is 12.5mL of 0.400M solution of HCL.

To know more about the mole concept, visit:

https://brainly.com/question/1427235

#SPJ1

To find the empirical formula from a molecular formula, you should divide the Subscripts by the Some integer in order to get the smallest whole number.

Part-A

The empirical formula of [tex]Al_{2}Br_{6}[/tex]is [tex]AlBr_{3}[/tex], we get it by dividing both subscript (i.e. 2&6) by 2.

Part-B

The empirical formula of C8H10 is

Simplest ratio of CH = 8:10 = 4:5

Hence, empirical formula =C4H5

Part-C

The empirical formula of C4H8O2 is C2H4O, we get it by diving all subscripts [tex]\frac{4}{2} : \frac{8}{2} :\frac{2}{2}=2:4:1[/tex] by 2.

Part- D

molecular formula= P4O10

simplest ratio of

[tex]\frac{P}{O}= \frac{2}{5} \\ empirical formula = p_{2}O_{5}[/tex]

Part -E

The empirical formula of C6H9CL2 is C3H2CL,we get it by diving all subscripts[tex]\frac{6}{2}:\frac{4}{2}:\frac{2}{1} =3:2:1[/tex] by 2

Part-F

The empirical formula of B3N3H6is BNH2, we get it by diving all subscripts [tex]\frac{3}{3} :\frac{3}{3} :\frac{6}{3} = 1:2:3[/tex] by 2.

To know more about molecular formulae visit:

https://brainly.com/question/14425592

#SPJ4

Answer:

the option will be no.3

Explanation:

why? because I said so

Answer:

How do you identify an unknown white powder?

Not only can Raman spectroscopy be used to identify unknown white powders rapidly, it can also be used to identify explosives (Figure 3) and other biochemical agents such as anthrax and mustard gas

Explanation:

The molecular formula of the compound is [tex]C_{4} H_{8}[/tex]

We can calculate the empirical formula from the carbon and hydrogen percentage by assuming that we have 100 g of the substance:
carbon: 85.63 g / 12 g/mol = 7.1358 mol
hydrogen: 14.37 g / 1 g/mol = 14.37 mol
We divide the moles with the smallest amount to get a mole ratio:
7.1358 mol / 7.1358 mol = 1
14.37 mol / 7.1358 mol = 2.01
So the empirical formula is [tex]CH_{2}[/tex], with the molar mass of 12 + 2 * 1 = 14 g/mol.
We can calculate the molar mass of the compound using ideal gas laws. At STP, 1 mol of any gas has a volume of 22.4 L, so:
1 mol : 22.4 L = X : 0.255 L
X = 1 mol * 0.255 L / 22.4 L = 0.0114 mol
From this, we calculate the molar mass of the gas:
0.0114 mol : 0.646 g = 1 mol : X
X = 0.646 g * 1 mol / 0.0114 mol = 56.67 g/mol
To get the molecular formula, we divide the molar mass of the gas by the molar mass of the empirical formula:
56 g/mol / 14 g/mol = 4
So now we multiply the empirical formula by 4 to get the molecular formula:
[tex]C_{4} H_{8}[/tex]

You can learn more about molecular formulas here:
brainly.com/question/28647690

#SPJ4

Answer:

Atoms make up every form of matter, according to the atomic theory.

Explanation:

Hope this helps!

The property that causes the zinc shavings to react faster than the chunk of zinc is called the surface area.

The surface area is a crucial factor to consider while conducting any kind of chemical reaction because it considerably affects the reaction's rate. As surface area is reduced, response rates accelerate.

A chunk of zinc is like a body of stone kept together by strong bonding when contrasted to zinc shavings, which are zinc particles with lower surface areas.

The zinc shavings' reactive surface area is smaller than that of the enormous zinc chunk. Due to their reduced surface areas, reactants must be in close proximity to the acid solution for the reaction to take place.

Learn more about zinc:

https://brainly.com/question/21811823

#SPJ4

1. Grab a couple of lemons!

2. Baking Powder.

3. Colored food.

4. Dawn Dishwashing Soap

5. Tray, plate, or bowl

6. Sticks for making crafts.

7. Juice of lemon

Answer:

Reduce emissions, make clean energy, stop pollution, drive electric vehicles, and reduce meat consumption

Explanation:

Answer:

1. Save energy at home (heating, electricity)

2. Try walking, biking or taking public transport instead of going in a car or own vehicle

3. Don't waste food

4. Eat more vegetables

5. Try to travel without going on an airplane

An object that sinks in water is more dense than the one which floats on it. The slope on a graph can determine the density of these objects.

For an identical size object, a dense object weighs more than a less dense one. A substance that is less dense than water will float on it; a substance that is denser will sink. Density equals mass per unit volume, or D = M / V, is the density equation.

The density of a substance can be determined by dividing its mass by its volume. Mass is on the y-axis and volume is on the x-axis in a graph of mass against volume. By calculating the slope, which is the change in y divided by the change in x, you may use this sort of graph to compute density.

To know more about density, refer to the following link:

https://brainly.com/question/952755

#SPJ9

Answer:

Anything related to science needs to be detailed and understood by a range of people. Or, what they published may not create any impact if you can't read it and understand what you just read.  

Explanation:

A large class of heterocyclic aromatic organic compounds are descended from oxazole. These are azoles, which have one carbon between the oxygen and the nitrogen.

Although less aromatic than thiazoles, oxazole are nonetheless compounds. Since imidazole’s conjugate acid has a pKa of 7, oxazole’s conjugate acid has a pKa of 0.8.

In this study, the most recent research and discoveries on the full spectrum of oxazole compounds as pharmaceuticals—including those with antimicrobial, antifungal, antiviral, antitubercular, anticancer, anti-inflammatory and analgesic properties—were carefully examined.

Because nitrogen is more basic than oxygen, protonation occurs at the sp2 orbital of nitrogen in oxazole. Oxazole’s oxygen atom reduces the

To know more about oxazole visit:

https://brainly.com/question/12994604

#SPJ4

After one week he counts the number of scratches on the floor it is the independent variable.

An independent variable is one whose values are altered by the researcher to achieve the desired results.

The variable is known as the dependent variable when its values change in response to changes in the independent variable's values.

The dependent variable serves as the experiment measure while the independent variable controls the experiment.

The dependent variable is an effect of the independent variable, which is a cause.

In a linear regression, we can state that "y" stands for the dependent variable and "x" for the independent variable.

While the dependent indicates the influence of changes in the independent variable, the independent depends on nothing.

To learn more about independent variable refer the link:

https://brainly.com/question/967776

#SPJ9

10.81 mole of calcium chloride (CaCl2) does a town use daily if it uses 1.2 metric tons a day mole is a standard scientific unit for the calculation of large amounts of very small entities

Here given data is 1 metric ton = 1000 kilograms then 1.2 metric tons = 1200 kilogram then we have to find moles of calcium chloride (CaCl₂) =?

Then here concept are moles, molar mass of a substance is the mass in grams of one mole of that substance

Here given molar mass of (CaCl₂) = 110.98

So, given molar mass of calcium chloride (CaCl₂) / 1200

n = 1200/110.98 = 10.81 mole

So, 10.81 mole of calcium chloride (CaCl2) does a town use daily if it uses 1.2 metric tons a day

Know more about moles

https://brainly.com/question/2150938

#SPJ1

The anhydrous magnesium sulfate required to dry a di-ethyl ether solution after performing extractions involving water is enough such that some powder remains free flowing in solution with swirling without clumping.

Extraction is a process which involves transfer of a solute from one phase to another. A cup of tea or coffee prepared represents a process of extraction.The flavor and odor components are extracted from the dried material into the water.

Anhydrous magnesium sulphate works as a drying agent. Magnesium sulfate (MgSO₄) works by forming complex with H₂O in the solvent. It forms a hydrated MgSO₄ precipitate. This precipitate is then filtered out by gravity, which yields an anhydrous product. Due to the high affinity towards water molecules, MgSO₄ removes any amount of water from the extracts.

Due to the presence of an active hydrogen atom, ethyl alcohol reacts with magnesium metal. Diethyl ether, does not have any replaceable hydrogen atom. So, it does not react with magnesium sulfate, therefore, can be dried by anhydrous magnesium sulfate.

Complete question is -

How much anhydrous magnesium sulfate is required to dry a diethyl ether solution after preforming extractions involving water?

Select answer and submit.

a. Enough to cover the tip of your scoopula once

b. 1 g/mL of diethyl ether

c. Enough such that some powder remains free flowing in solution with        

   swirling without clumping

d. Anhydrous magnesium sulfate doesn't dry diethyl ether

To learn more about extraction,

brainly.com/question/14038722

#SPJ1

The second resonance contributor demonstrates the aromaticity of the compound by maintaining the six-membered ring with 6 (4n+2) pi electrons.

The easiest way to draw another resonance structure is to move an pi-electron pair and then repeat that process. After three shifts, the resulting structure does have separated charges, with a positive charge on one of the oxygen atoms (which is not too favorable, considering the oxygen's high electronegativity), but all the non-hydrogen atoms still have a full octet and the presence of the aromatic ring does greatly stabilize the structure. It also explains why the compound (resonance hybrid) is aromatic.

You can learn more about resonance here:
brainly.com/question/28318319

#SPJ4

At the end of an enzymatic reaction, the concentration of the enzyme does not change as the substrate and product concentrations rise.

How does the concentration  of a substrate impact the rate at which an enzyme reacts in an enzymatic reaction?

An enzyme-catalyzed reaction initially progresses at a faster pace as substrate concentration rises. This rise in reaction rate levels off as the substrate saturates the enzyme molecules. An enzyme's concentration influences how quickly a reaction is catalyzed, and vice versa.

As long as there is substrate available, increasing the concentration of the enzyme will accelerate the reaction.

Up until a certain point, increasing the substrate concentration also accelerates the process. As more molecules of substrate and enzyme interact, more product will be produced.

To know more about enzymatic reaction visit: brainly.com/question/24618218

#SPJ4

Jar containing sulfur-30 will have least amount of sulfur.

Radioactivity of a substance decreases with increase in time indicating that they are inversely proportional.Among the different isotopes of sulfur mentioned ,sulfur-35 is most radioactive as it has half-life period of 87.5 days.

On the other hand, sulfur-30  is least radioactive as it has half-life period of 1.18 seconds, thus within 10 seconds the jar containing sulfur-30 will be  almost empty.

Therefore,the jar containing sulfur-30 will have least amount of sulfur after 10 seconds as it's half-life is least.

To know more about radioactivity click here:

https://brainly.com/question/1770619

#SPJ1

Four molecules of HCl are needed to produce four molecules of H₂O.

The number of molecules of of HCl needed to produce four molecules of H₂O is determined from the mole ratio of the reaction as given in the equation of the reaction below:

2 HCl (aq) + Ca(OH)₂ (aq) → CaCl₂ (aq) + 2 H₂O (l)

The mole ratio of the reaction as given in the equation shows that 2 moles of HCl produces 2 moles of water.

Therefore, the mole ratio  of HCl and H₂O is 1 : 1

Four moles of H₂O will be produced by four molecules of HCl

The number of molecules of HCl in 1 mole of HCl is 6.02 * 10²³ molecules.

1 mole of every substance contains equal number of particles.

Hence, 1 mole of water will contain  6.02 * 10²³ molecules.

Based on the mole ratio of the reaction, four molecules of HCl are needed to produce four molecules of H₂O.

Learn more about molecules at: https://brainly.com/question/475709

#SPJ1

Just as height and breadth are ways to express size, volume is a measure of an object's size.

The area occupied by gaseous particles under normal temperature and pressure circumstances is referred to as the volume of gas. It is identified as a "V. The letter "L" stands for "liters," the SI unit of volume. At normal temperature, a mole of gas has a volume of 24 m3, or 24 000 cm3. The molar volume of a gas is the name given to this quantity. For instance, the formula for calculating the volume of 40 moles of gas at a temperature of 250 K and a pressure of 1013 hPa is V = nRT/p = 40 * 8.31446261815324.

To learn more about volume refer to:

https://brainly.com/question/463363

#SPJ9

The physical properties of elements in the periodic table varies as follows;

The Periodic table is a table which arranges elements based on their increasing atomic number into vertical columns called groups and horizontal rows known as periods.

The physical properties of the periodic table refers to the properties in of the elements in the periodic table which vary in a regular pattern both down the groups and across the periods.

Some physical properties of the periodic table are as given below:

Melting and boiling point: the melting and boiling point of the metallic elements in the period table increases on going from left to to right across the period and decreases on going down the group. For non-metallic elements, the melting and boiling point decreases on going from left to to right across the period and increases on going down the group

Atomic size: the atomic size of the elements decrease across a period from left to right, but increases on going down the group.

Learn more about periodic table at: https://brainly.com/question/15987580

#SPJ1

A natural resource that will replenish to replace the portion used up by usage and consumption, commonly referred to as a flow resource, will do so through natural reproduction or other cyclical processes in a limited length of time on a human time scale.

Which statement describes renewable resources?

"Renewable resources replenish quickly."

Resources that can replace themselves over time as they are utilised or that can last indefinitely are considered renewable resources. They consist of biomass, the sun, wind, water, and geothermal energy. Renewable resources have the drawback of not always being accessible when needed.

Biomass energy (such as ethanol), hydropower, geothermal energy, wind energy, and solar energy are examples of renewable resources.

Finding the best way to use renewable resources is a task that is becoming more and more crucial as the Earth's nonrenewable resource supply is depleted. In addition to better sustaining the world's quickly expanding population, switching to renewable energy will also leave the environment greener and healthier for future generations.

To know more about renewable resources, click on the link below:

https://brainly.com/question/25389846

#SPJ9

Answer:  C

Explanation: I took the quiz

The mole fraction of benzoic acid in the solution is 0.855.

What is benzoic acid?

Benzoic acid is a white solid which is a carboxylic acid based on benzene.

The vapor pressure of the benzoic acid solution and the mole fraction of the solute are directly proportional to each other i.e.

Pt = x P°s

Here t = total pressure

s = solvent

Given:

Vapor pressure of diethyl ether = 400.0 torr

Vapor pressure of the solution = 342 torr

Now substituting the values in the formula

342 =   x 400

= 342 / 400

 = 0.855

Thus, the mole fraction of benzoic acid is 0.855

If you need to learn more about benzoic acid click here;

https://brainly.com/question/28299797

#SPJ4