The best explanation for the organization of Mendeleev's Periodic Table by atomic mass rather than atomic number is that ―

Here's a few connections I can make for you:

The cell membrane is what contains everything in the cell. Akin to the skin on humans.

The cytoplasm contains all the cell substances outside of the nucleus.

The nucleus is the control center of the cell. Inside, are the chromosomes which store DNA. The nucleus is surrounded by the nuclear membrane.

The mitochondria is the powerhouse of the cell. It produces energy also known as ATP.

Ribosomes are found attached to the endoplasmic reticulum. Ribosomes are responsible for protein synthesis.

Answer:

Explanation:

10.is false

11. is volcanism

12.true

13.c

14. From the deepest ocean trench to the tallest mountain, plate tectonics explains the features and movement of Earth's surface in the present and the past. Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core

Answer:

32 g of HNO3

Explanation:

Data Given:

Solution= 32% HNO3 by Mass

Amount of HNO3 in 100g Solution = ?

Solution:

% solution by mass = mass of solute/total mass of solution × 100 %

So,

32% HNO3  = 100g of solution contains 32 grams of HNO3

now applying the unity method

if 100 g of solution contains 32g of HNO3

Then 1g of solution will contain = ………. 32/100

So 100g of solution contain = 32x100/100= 32 g of HNO3

Answer:

[tex]\frac{46 g}{1 mL}[/tex] × [tex]\frac{1 kg}{1000 g}[/tex]

= [tex]\frac{46 kg}{1000 mL}[/tex]  

= [tex]\frac{46 kg}{1 L}[/tex]

Explanation:

Since 1 kg is equal to 1000 g we multiply 46g/1mL by 1kg/1000g. Grams being on the bottom of the fraction so that they will cancel out. After this calculation we have 46kg/1000mL. This is equal to 46kg/1L, also written as 46kg/L.

Answer:

Explanation:

One quantitative measurement that can be made from the above diagram is the length of the ruler. The ruler is an instrument used to measure short distances in the order of centimeters. Longer distances can be measured using a tape rule.

Mass is the amount of matter a substance contains. Weight is a function of mass and gravity on a body. When the mass of a body is recorded, it is the same everywhere in the universe. Weight on the other hand varies as gravity changes.

Answer:

The pencil measures approximately 5.5 units and mass is the amount of matter contained in a body and weight is the action that exerts the force of gravity on the body.

Explanation:

A quantitative measure that can be made from the scene shown is the length of the pencil because to measure it quantitatively we have a rule. The pencil measures approximately 5.5 units in length.

Mass is the amount of matter contained in a body and weight is the action that exerts the force of gravity on the body. The mass of an object will remain constant regardless of where it is measured, while the weight of the object will vary according to the force of gravity acting on it, which is different from the place on earth where the measurement is made.

Have a nice day!

Explanation:

You can use copper's chemical activity to extract copper from an ore. In the process of electrolysis, and electric current breaks the chemical bond that joins the metal and other elements in the compound. ... When iron ore and a source of carbon are heated together, the iron is released

Answer:

The concentration solution by percent in mass is 8.28%

Explanation:

Molarity is moles of solute present in 1L of its solution .

Hence the formula is  

[tex]$\left.\text {Molarity}=\frac{\text {moles of solute}}{\text {Volume of solution in } L} \text { (unit is } \frac{\text { mol }}{L} \text { or } M\right)=\frac{1.50 \mathrm{mol}}{1 \mathrm{L}}$[/tex]

Let us convert the numerator and the denominator into mass in g

Numerator :                                  

[tex]mass $=$ moles $\times$ molar mass\\\\$=1.50 \mathrm{mol} \times 58.5 \frac{g}{\text { mol }}=87.75 \mathrm{g}$ (solute)[/tex]

Denominator :                        

[tex]$\begin{aligned} \text {mass} &=\text { density } \times \text {volume}=\frac{1.06 \mathrm{g}}{1 \mathrm{ml}} \times 1 \mathrm{L} \\\\ &=\frac{1.06 \mathrm{g}}{1 \mathrm{ml}} \times 1000 \mathrm{ml}=1060 \mathrm{g} \end{aligned}$[/tex]

The formula to find mass percentage is

[tex]$\%$ mass $=\frac{\text { mass of solute }}{\text { mass of solution }} \times 100 \%$[/tex]

[tex]$\%$ mass of $\mathrm{NaCl}=\frac{\text { mass of solute }}{\text { mass of solution }} \times 100 \%$[/tex]

[tex]$=\frac{87.75 g}{1060 g} \times 100 \%$\\[/tex]

=8.28% (Answer)

Answer:

8.27% on edge

Explanation:

The statement is false. Forming a hypothesis is not the first step of the scientific method. The first step is making observations.

The statement is false. Forming a hypothesis is not the first step of the scientific method. It is actually the third step. The first step is making observations, followed by asking a question based on these observations. After these steps, a hypothesis is formed. A hypothesis is an educated guess about the answer to the question posed, based on available information. This guess is then tested through an experiment in the following steps of the scientific method.

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Answer:

Condensation

Explanation:

In consideration the temperature does not change so the heat change the state of the substances

Answer:

A

Explanation:

because the substance is using the pressure of heat to melt the substance

Answer:

0.924602

Explanation:

Answer:

Explanation:

3.5 l = .9246 gal

3.5 l = 3500 ml

3.5 ml = .0009246

Answer:    A plasma ball — also sometimes called a plasma globe, lamp, dome, or sphere — is a clear glass ball filled with a mixture of noble gases with a high-voltage electrode at its center.

Explanation:

a massive plasma ball is a one of those random things that you find at walmart lol. when you put ur hand on it it looks like little lightning strikes are touching ur hand

Answer:

attitude

Explanation:

if your in k12 health attitude is the answer. perceptions was wrong

An attitude has a great influence on one’s sense of self, in addition to self-confidence, self-respect, and values.

So, first option is correct one.

The self of sense also refer as ego , individuality and personality.

The things which contributes identity as a person are,

learn about self-confidence.

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Answer: Genes

Explanation: Both plants are heterozygous for smooth seeds making it a dominant trait.

Answer:

Most carbon compounds are formed by exchanging electrons with carbon. True

The formula for C2H6 is CH3-CH3.

Explanation:

The given formula C2H6 is the molecular formula depicting the integral number of atoms of combining elements. From this formula, it can confirmed that 2 atoms of carbon has combined with 6 atoms of hydrogen, but the arrangement of these atoms and the bonding between them is unclear from the given formula.

In order to determine the bonding occurring between elements and how the atoms are arranged or bonded with each other, we use structural formula representation. It is known that a single carbon atom that should have four bonds to attain the stable state and each hydrogen atom can share only one electron.

So the structural formula of C2H6 can be written as CH3-CH3. This indicates that three hydrogen atoms will be bonded with a single carbon atom leading to formation of single bond between two carbon atoms surrounded by three hydrogen atoms on either sides of carbon atoms. This material is termed as ethane and it falls in alkalies group of organic compounds.

Answer:

The general Formula given for alkanes is [tex]CnH2n+2[/tex] and hence it shows [tex]C_2 H_6[/tex] is the second alkane and is named ethane.

Explanation:

Formula here shows two molecules of [tex]CH_3[/tex] are joined that is the formula for Ethane becomes [tex]CH_3-CH_3[/tex].

If we break the name ethane it gives two divisions eth and ane the former means to while the latter represents the alkane family. Hence the formula represents two carbons in alkane family which makes it [tex]C_2H_6[/tex].

Answer:

most likely c

Explanation:

the volume is increased by the quickly moving water particles

Answer: Option C

Explanation:

The molecules has kinetic energy and potential energy both.  When the water molecules were heated  on a Bunsen Burner then there can be a slight increase in the volume of the water.

This is because upon heating the kinetic energy of the molecules increases and it starts moving fastly.

Due to the movement of the particles, they become far from each other and there is a slight increase in the volume of the water.

Answer:

Mass of sodium is 0.1305 g.

Explanation:

Given data:

Number of moles of sodium = 0.0135 mol

Molar mass of sodium = 23 g /mol

Mass of sodium = ?

Solution:

Formula:

Number moles = mass / molar mass

Mass = number of moles × molar mass

Mass = 0.0135 mol × 23 g/mol

Mass = 0.3105 g

Final answer:

The mass of 0.0135 mol of sodium (Na) is 0.310 g.

Explanation:

The mass in grams of 0.0135 mol of the element sodium (Na) can be calculated using the molar mass of sodium. The molar mass of sodium is 22.99 g/mol. To calculate the mass, you multiply the number of moles by the molar mass:

Mass (g) = Number of moles x Molar mass

So, the mass of 0.0135 mol of sodium is:

Mass (g) = 0.0135 mol x 22.99 g/mol = 0.310 g

The correct steps in the scientific method did vector most likely do before the step described is make conclusion based on the graph. Thus option c is correct.

Victor made the graph shown to record the observations of an experiment to study the effect of soil additives on the growth of plants.

Three identical plants having a height of 25 cm were used for the experiment. The first plant had no soil additives, the second plant had wheat straw in the soil, and the third plant had polymer in the soil. All other growing conditions of the plants were kept constant.

Volume is calculated if the mass and density are given as below:

As we know that density is mass per unit volume it means 1 kg of mass in 1 cubic meter is called volume.

So, mathematically

Density = mass/ volume

Then

Volume = mass/density

S.I unit of volume is cubic meter.

Therefore, The correct steps in the scientific method did vector most likely do before the step described is make conclusion based on the graph. Thus option c is correct.

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The correct step in the scientific method did Victor most likely do before the step described here is option C: Construct a hypothesis

Volume is calculated by dividing the mass of an object by its density. So, the correct option is option b: Mass divided by density

Scientists usually begin by creating a hypothesis before doing an experiment and gathering information.

A hypothesis is an idea or guess that can be tested to explain something we are studying.

In this situation, Victor would have guessed how adding things to the soil (like wheat straw and polymer) would change how plants grow, compared to plants without any added things.

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Answer:

Final temperature = T₂ = 328.815 K

Explanation:

Given data:

Given energy = 980 KJ = 980×1000= 980000 J

Volume = 6.2 L

Initial temperature =T₁= 291 K

Specific heat of water = 4.18 j /g .K

Final temperature = T₂ = ?

Formula:

Q = m. c . ΔT

ΔT = T₂ - T₁

we will first convert the litter into milliliter

6.2 × 1000 = 6200 mL

It is given in question that

1 mL = 1 g

6200 mL = 6200 g

Now we will put the values in formula,

Q = m. c . (T₂ - T₁)

980000 j = 6200 g . 4.18 j /g .K . (T₂ - 291 K)

980000 j = 25916 j/ k .  (T₂ - 291 K)

980000 j /  25916 j/ k =  T₂ - 291 K

37.8145 K + 291 K =T₂

T₂ = 328.815 K

Answer:

0.020 kg=20 g  this the largest

20.0 mg=.020g

.200g

2000ug

Explanation:

Final answer:

The largest mass among the given options is 0.020 kg, as it is already in kilograms and larger than the other masses when they are converted to the same unit.

Explanation:

The question asks which of the following masses is the largest:

0.020 kg

20.0 mg

0.200 g

2000 ug

To compare them, we need to express them all in the same unit, which is kilograms (the SI base unit of mass).

0.020 kg remains the same.

20.0 mg = 20.0 x 10⁻⁶ kg = 0.000020 kg

0.200 g = 0.200x 10⁻³ kg = 0.000200 kg

2000ug = 2000x 10⁻⁹ kg = 0.000002 kg

After converting, we can see that 0.020 kg is the largest mass among the given options.

The isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions because the nuclear reactions involve changes to protons and neutrons in an atom and isotopes differ in neutrons and so they react differently to nuclear changes. While for chemical reactions, the electrons in an atom are involved but the isotopes do not differ in electrons and so they react the same way during chemical changes.

Answer: Option A & C

Explanation:

The reactants of chemical and nuclear reactions are different. The reactants of chemical reactions are the electrons present in the outermost shell of the reactants, while the reactants of nuclear reactions are either the nuclei of reactants or a nuclei and any subatomic particles of other reactants.

Thus it can be understood that chemical reactions consider the electrons while nuclear reactions consider the nuclei or the number of protons and neutrons of the reactants.

The isotopes of elements contain different mass number or we can say different number of neutrons but the number of electrons are same, so they behave differently in nuclear reactions and similar in chemical reactions.

Answer:

A and C

Explanation:

Answer:

.0931 is the answer

Explanation:

you need the equations to be equal, so basically you need both of them to add up to 9310 since 9.31 x 10^3 = 9310.

In order to do this you need to move the decimal point on 9.31 to the left by 2, which is .0931.

.0931 x 10^5 = 9310

Answer:

0.0931

Explanation: since 9.31*10^3=9310 and since division is the opposite of multiplication then if you divide 9310 by 10^5 you get 0.0931

A 10.0cm3 volume of alcohol has a mass of 7.05g. [tex]0.705 \frac{g}{c m^{3}}[/tex] is the density

Answer:  [tex]0.705 \frac{g}{c m^{3}}[/tex]

Explanation:

The ratio between the mass of a substance and its unit volume is referred as density.

[tex]\text {Density}=\frac{\text { mass }}{\text { volume }}=\frac{7.05 g}{10.0 \mathrm{cm}^{3}}=0.705 \frac{g}{\mathrm{cm}^{3}}[/tex] is the Answer

Note:

1000 g = 1 kg

100 cm = 1 m

When we used to transform the given values into S.I units, then

[tex]\text {Density}\left(\frac{k g}{m^{3}}\right)=\frac{\text {Mass}(k g)}{\text {Volume}\left(m^{3}\right)}[/tex]

Alcohol’s volume can be written as, [tex]10.0 c m^{3} = 10 \times 10^{-2} m^{3}[/tex]

Alcohol’s mass can denote as, [tex]7.05 g = 7.05 \times 10^{-3} \mathrm{kg}[/tex]

Then, [tex]\text { Density }\left(\frac{k g}{m^{8}}\right)=\frac{, 00705(k g)}{0.1\left(m^{3}\right)} = .0705 \frac{\mathrm{kg}}{\mathrm{m}^{\mathrm{s}}}[/tex]

Answer:

atomic mass

Explanation:

Answer:

atomic weight or atomic mass.

Explanation:

The development of periodic table starts from the Dobereiner's law of triad where he arranged the elements based on the average of atomic weight of two elements. the middle element was supposed to one with the atomic weight average of the two other elements.

Then the Newland law of octave was proposed where he observed the changes in the periodic trend based on atomic weight after seven elements.

Later Mendleev arranged the elements based on atomic weight only.

Thus the answer is atomic weight or atomic mass.

In modern version we use atomic number to arrange elements.

Answer:

$99.99

Explanation:

Given parameters:

Cost of gold per ounce = $323.12

weight of gold in the lab = 8.7739g

Solution

We need to first convert the mass of the weighed gold into ounces from grams:

            1 gram = 0.03527oz

          8.7739g = 8.7739 x 0.03527; 0.31oz

Since 1oz of gold is $323.12

        0.31oz of gold will be 0.31 x 323.12 = $99.99

The equation for photosynthesis is: 6H2O + 6 CO2 --> C6H12O6 + 6O2 The numerals in each part of the equation (without balancing it) mean: H2 = 2 atoms of Hydrogen O = 1 atom of Oxygen } H2O=water C = 1 atom of Carbon O2 = 2 atoms of Oxygen } CO2= Carbon Dioxide C6 = 6 atoms of Carbon H12 = 12 atoms of Hydrogen O6= 6 atoms of Oxygen } C6H12O6 } Glucose O2 = 2 atoms of Oxygen } O2 = Oxygen When balanced: 6H2O = 6 molecules of water 6CO2 = 6 molecules of Carbon dioxide C6H12O6 = Glucose 6O2 = 6 molecules of Oxygen.

Answer:

The correct answer is "Number of atoms"

Explanation:

Photosynthesis is a unique metabolic process carried out by certain cells of those autotrophic organisms capable of elaborating their own organic matter with inorganic substances by using the energy provided by sunlight. In other words, photosynthesis is the process by which plants make their own food. For that, they need air, sun, light and water and thus, they can live and develop.

The general chemical reaction for photosynthesis is 6 moles of carbon dioxide (CO₂) and 6 moles of water (H₂O), with the addition of solar energy. This produces 1 mole of glucose (C₆H₁₂O₆) and 6 moles of oxygen (O₂). That is, the equation is represented as:

6 H₂O + 6 CO₂ --> C₆H₁₂O₆ + 6 O₂

The letters represent elements present in the species that reacts or is produced. The numbers that appear as subscripts indicate the number of atoms of the element immediately before the subscript that appear in each species and, if no subscript appears, it indicates that an atom is present.

So, the correct answer is "Number of atoms"

First Law: An object in motion will stay in motion unless acted on by an unbalanced force. An object at rest will stay at rest unless acted on by an unbalanced force.

Lets say a cup is sitting on a table, if you fall into that table and knock over the cup you are the unbalanced force acting upon the cup. The cup is at rest until you (the unbalanced force) acted upon it.

Second Law: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Say you are at the Supermarket. Its easier to push the empty shopping cart. Once the cart is filled you must exert more force to push it. This is because the empty cart has less mass than the full one.

Total, approximately 2.19 x 10²⁴ atoms in 3.64 mol of pure aluminum.

To determine the number of atoms in a given amount of substance, you can use Avogadro's constant (6.022 x 10²³ atoms/mol). This constant will represents the number of atoms, ions, or the molecules in one mole of the substance.

Given:

Amount of aluminum (Al) = 3.64 mol

Avogadro's constant = 6.022 x 10²³ atoms/mol

Number of atoms = Amount of substance (in mol) × Avogadro's constant

Number of atoms = 3.64 mol × (6.022 x 10²³ atoms/mol)

Number of atoms ≈ 2.19 x 10²⁴ atoms

Therefore, there are approximately 2.19 x 10²⁴ atoms in 3.64 mol of pure aluminum.

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