Which property do solutions with high pH values have?


gives off hydrogen gas when reacted with metal


turns litmus paper red


tastes sour


feels slippery

Answer:

oxygen (O2 )

Explanation:

The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.

A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.

This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.

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Answer:

d

Explanation:

increasing the temperature the fraction of molecules which collide with energy greater than Ea increase and hence the rate constant

Answer:

C)

Explanation:

Answer:

44 g/m

Explanation:

Answer:

How do amoeba respire.

Define Diffusion.

Answer:

As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.

The percent by mass of sulfur is  20.1%.

Here, we need to find the percent by mass of the sulfur atom and we have to do that by first obtaining the molar mass of the compound as we can see it from the question.

Hence;

Molar mass of the compound = 63.55 + 32.07 + 4( 16.00 )

=  63.55 + 32.07 + 64

= 159.62

We now have to find the percent by mas of sulfur;

32.07/159.62  * 100

= 20.1%

The compound contains 20.1% of sulfur by mass of the compound as shown in the calculation.

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Synthetic materials are made from natural resources and can be used for many purposes.

Synthetic materials are made by chemically changing the starting substances to create a material with different characteristics. Some examples of synthetic materials are plastics, medicines, and new fuels.

A synthetic substance may be chemically identical to a naturally-occurring substance or may be different.

Item is made from a synthetic material :

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A change in the size of the moon jellies' resource population can change the number of births in the moon jelly population because the big size of the resources can produce more births.

When there is more energy storage molecules present in the moon jellies, they can reproduce more, in more births. Fewer deaths would also lead to the jelly population increasing. The sea turtle population, and the moon jellies consumer population is also decreased.

There must be a change to the birth rate or the death rate in the moon jelly population. Within a population, organisms are born and dying continuously. If the number of births and deaths in a given time interval are equal, then the population size will remain stable.

So we can conclude that a large population of resources will lead to more births.

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Answer:

2450 cm3

Explanation:

Volume of cylinder = V=πr2h

2.45L = 2450mL

1mL = 1 cm cubed

2450mL = 2450 cm cubed

The volume of the cylinder container in cubic centimeters is 2.45 × 10³ cm³.

We usually can find the volume of a cylinder applying the following expression.

\(V = \pi r^{2} h\)

where,

Since we don't know the height, we will have to use the information that it can hold 2.45 L of water. We can convert liters to cubic centimeters using the following conversion factors:

\(2.45 L \times \frac{1000mL}{1L} \times \frac{1cm^{3} }{1mL} =2.45 \times 10^{3} cm^{3}\)

The volume of the cylinder container in cubic centimeters is 2.45 × 10³ cm³.

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Answer:

2.44 %

Explanation:

Given that,

The calculated value of specific heat of water to be 4.29 J/g°C

The actual value of the specific heat of water is 4.18J/g°C

We need to find the percentage error of the student

\(\text{Percentage error}=\dfrac{|\text{actual value-calculated value}|}{\text{actual value}}\times 100\\\\\%=\dfrac{4.18-4.29}{4.49}\times 100\\\\\%=2.44\)

Hence, the student's percent error is 2.44 %.

D

Polar colvalent means that the atoms making up the bond have a significant electronegativity difference. There is no electronegativity difference between 2 of the same atoms (B/C) and hydrocarbon chains are generally nonpolar (A/E) leaving just D.

The compound C₂H4O2 from the given choices is made up of polar covalent bonds, due to the unequal sharing of electrons between the different atoms.

The compound from the list that would be formed using polar covalent bonds is d) C₂H4O2. Covalent bonds involve the sharing of electron pairs between atoms. In a polar covalent bond, the electrons are not shared equally because one atom exerts a stronger force of attraction on the electrons than the other. The compound C₂H4O2, also known as acetic acid, has polar covalent bonds due to the difference in electronegativity between the carbon, hydrogen, and oxygen atoms.

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An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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Answer:

a. chemical change

Explanation:

A chemical change can cause an odor, however a physical change cannot, and the use of thermal energy will only make an object colder, not give it an odor.

Answer:

5d

Explanation:

Shell s. p. d. f

L. 0. 1. 2. 3

The value of the angular quantum number, l gives an information about the energy subshell and the number of orbitals. Hence, the subshell notation for the quantum number in question is d and has 5 orbitals

The angular quantum number, l = 2

The energy subshell corresponding to l = 2 would be ;

Hence, the quantum number corresponds to the d - subshell

According to the magnetic quantum number, m ;;

At, l = 2 :

m = {-2, - 1, 0, 1, 2} = 5

The value of m denotes the number of orbitals which is 5

Therefore, the subshell notation and number of orbitals are d and 5 respectively.

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In studying the influence of environmental pH on peroxidase activity, researchers can repeat the experiment without guaiacol, which will reveal the effect of guaiacol on reaction rates.

One of the investigators' proposal to use oxygen gas production to measure reaction rates leads to a change in the dependent variable.

In the first experiment the dependent variable was the volume of guaiacol and in the second experiment the dependent variable will be oxygen production.

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Combination Reaction.

Explanation:

Answer:

b kinetic energy

hope it helps;)

The term or terms that could be used to describe this sample of smoke are "mixture" and "heterogeneous mixture".

A mixture is a combination of two or more substances in which each substance retains its own chemical properties and can be separated by physical means, such as filtering or distillation. A heterogeneous mixture is a type of mixture in which the different components can be easily seen or distinguished and are not evenly distributed throughout the mixture.

In this case, the dust particles and gases are different substances that can be distinguished and are not evenly distributed throughout the sample, therefore it is a heterogeneous mixture.

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Answer:

Inertia

Explanation:

Answer:

Mass = 15.13 g

Explanation:

Given data:

Mass of ammonia formed = ?

Number of hydrogen atoms = 8.11× 10²³ atoms

Solution:

Chemical equation:

N₂ + 3H₂     →      2NH₃

1 mole = 6.022× 10²³ atoms

8.11× 10²³ atoms × 1 mol / 6.022× 10²³ atoms

1.35 moles of hydrogen

Now we will compare the moles of hydrogen and ammonia,

              H₂         :        NH₃

               3          :          2

              1.35      :         2/3×1.35 = 0.89

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.89 mol × 17 g/mol

Mass = 15.13 g

The diagram shows a picture of a compound.

A compound is a substance that is made up of two or more different elements that are chemically bonded together in a specific ratio.

This means that the elements are combined in a way that creates a new substance with different physical and chemical properties than the individual elements.

Compounds can be formed through a variety of chemical reactions, such as combining elements through a chemical bond or through a reaction between an acid and a base.

So for the given diagram, we can see that it represents two or more elements chemically combined.

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Answer:

What are the options?

Explanation:

......

Answer:

c

Explanation:

Answer:

Molecules from food and molecules of oxygen move from the mouth and the nose to cells of the body through a series of blood vessels, including veins, arteries, and microscopically small blood vessels (capillaries), that extend throughout the body.Explanation:

Answer:

Molecules from food and air enter your body through your nose and mouth. These particles go down your throat and your lungs, and to your stomach. The blood also distributes these molecules.

Hope this helps!

Answer:

The Lewis structure to this question can be described as follows:

Explanation:

Structure of Lewis for  \(S^{2-}\):  

The maximum number of electrons from valence in \(S^{2-}\)  is 8 (6 from S as well as 2 from negative change).  

The valence electrons in the Lewis structure are placed on four sides of the atom.  

Thus the structure of Lewis for \(S^{2-}\) is as follows:

\(\left[\begin{array}{ccc} &. .&\\: &S&:\\&. .&\end{array}\right] ^{2-}\)

Lewis Mg Structure:  

Complete valence electrons are 2 in Mg.  

The Lewis structure for Mg, therefore, is as follows:

\(\ . \\ Mg\\ \ .\)

The Lewis structure for  \(Mg^{2+}\)

The maximum valence of electrons   \(Mg^{2+}\) in is=  0.

Thus, the structure for   \(Mg^{2+}\) is as follows:

 \(Mg^{2+}\)

Lewis structure for P :

The maximum number of valence electrons in P is = 5.

Thus, the structure for P is=

\(\ \ \ . \\ : P \ : \\\)

Answer:

its sodium hydroxide

Explanation: