Why do some transition metals have multiple oxidation states? Transition metals have multiple oxidation states because of their sublevel.

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:

Rigid plates that move around Earth's surface is called tectonic plates.

Explanation:

Lithosphere is rigid and relatively cold and is the outer surface of the planet. The convective motions of maintenance break the lithosphere into plates.

This place that a form can move in any direction, can move towards each other, can move away and push each other which is the reason for formation of mountains for shifting of continents for making of ocean basin.  

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.

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Answer:

22.27 °C = ΔT

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m × c × ΔT

Given data:

mass = 28 g

heat absorbed = 58 cal

specific heat of copper =  0.093 cal/g .°C

temperature change =ΔT= ?

Solution:

Q = m × c × ΔT

58 cal = 28 g × 0.093 cal /g.°C × ΔT

58 cal = 2.604 cal.°C × ΔT

58 cal / 2.604 cal .°C = ΔT

22.27 °C = ΔT

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:

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:

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

Answer:

22.96 $ per 1 g of gold

Explanation:

We know that 1 g is equal to 0.035 oz.

Now we formulate the following reasoning:

if         1 oz of gold have a value of 655 $

then    0.035 oz of gold have a value of X $

X = (0.035 × 655) / 1 = 22.96 $

Answer:

$22.92

Explanation:

To solve this problem, you should convert the units to have the same in each quantity.

First we are going to convert from grams (g) to ounces (oz):

[tex]1.00g*\frac{1oz}{28.34g}=0.035oz[/tex]

It means that there are 0.035 ounces in 1 gram.

Then you should multiply that value by the price of gold that is given in ounces (oz):

[tex]0.035ozGold*\frac{655.00}{1ozGold}=22.92[/tex]

That is the price of 1.00 gram of gold is $22.92

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:

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:

.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

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:

$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 most important step in the scientific method is observation. Observations allow scientists to gather data and information about the natural world, which is essential for forming hypotheses, conducting experiments, and drawing conclusions.

The most important step in the scientific method is observation. This is because observations allow scientists to gather data and information about the natural world. Without accurate observations, it would be difficult to form hypotheses, conduct experiments, and draw conclusions.

Observations can be made using our senses, such as seeing, hearing, touching, tasting, and smelling. Scientists carefully observe and record their findings in order to better understand a phenomenon or solve a problem. For example, if a scientist is studying the growth of plants, they would observe and record the height, color, and number of leaves of different plants over a period of time.

Observations help scientists identify patterns and trends, which can then be used to formulate hypotheses and design experiments. They provide the foundation for the entire scientific method and help scientists make informed decisions based on evidence.

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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.

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].

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:

The mass is 1025 grams or 1.025 kgs

Explanation:

Mass = Density * Volume  

Mass = 1.025g/ml (Density) * 1000ml (volume )

Mass = 1.025g/ml * 1000ml= 1025 g  

1025 g = Mass    = 1.025 kgs

Answer:

9.6 %

Explanation:

Step 1: How to define  percent error ?

⇒ % error is the difference between a measured value and the known or accepted value

⇒Percent error is calculated using the following formula:

⇒%error  =  | Experimental value-theoretical value/theoretical value |  x100%

⇔ this can be written as well as : error = (| Experimental value/ theoretical value | - | Theoretical value / Theoretical value | ) x100%

Step 2: Calculate % error

In this case, this means :

%error = ( |(4.45 cm - 4.06cm ) / 4.06cm | ) x100%

%error = 0.096 x100%

%error =9.6 %

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:

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:

The average atomic mass of Y is 123.4725 g/mol

Explanation:

The average mass of an element is calculated by taking the average of the atomic masses of its stable isotopes.

The enitre atomic mass = 100 % or 1

⇒ this consists of 57.25 % atoms with mass 123.90 g/mol

57.25 % = 0.5725

⇒ this consists of 42.75 % atoms with mass 123.90 g/mol

42.75 % = 0.4275

To calculate the mass of this isotope we use the following:

0.5725 * 123.90 + 0.4275 * 122.90 = 123.4725 g/mol

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:

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.

Answer:

0.924602

Explanation:

Answer:

Explanation:

3.5 l = .9246 gal

3.5 l = 3500 ml

3.5 ml = .0009246

Answer: Genes

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

Magnesium (Mg) has 10 core electrons. Core electrons are the electrons in an atom that occupy the inner energy levels, closer to the nucleus. In the case of magnesium, the electron configuration is 1s² 2s² 2p⁶ 3s².

In an atom, electrons occupy different energy levels or orbitals. The innermost energy level, known as the 1s orbital, can hold up to 2 electrons. The next energy level, 2s, can also hold up to 2 electrons, followed by the 2p orbital, which can hold up to 6 electrons. The electrons in the innermost energy levels, specifically the 1s and 2s orbitals, are considered core electrons.

In the case of magnesium (Mg), its electron configuration is 1s² 2s² 2p⁶ 3s². This means that there are two electrons in the 1s orbital, two electrons in the 2s orbital, six electrons in the 2p orbitals, and two electrons in the 3s orbital. The core electrons in magnesium are those in the filled 1s and 2s orbitals, which add up to a total of 10.

Hence, magnesium has 10 core electrons.

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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