Use the above picture to fill in the blanks for the following statement. The _______sodium combines with the _______ chlorine to form the _______ sodium chloride.

A. compound; compound; element

B. element; element; compound

C. element; compound; mixture

D. compound; element; mixture

In order to measure the zone of inhibition we measure the diameter of the zone of inhibition including the diameter of the disc.

A Zone of Inhibition Test, also called a Kirby-Bauer Test, is a qualitative method used clinically to measure antibiotic resistance and industrially to test the ability of solids and textiles to inhibit microbial growth. The zone is measured by the diameter across the zone and you do not consider the disc at all. Zone is measured from edge to edge of the clear area , which means disc will be inside and included in the measurement.

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

all i really know is that STP (standard temperature and pressure) represents conventional conditions established by IUPAC with T = 273.15 K, P = 1 atm . Now putting these values of temperature and pressure at STP, we can calculate easily volume occupied by 1 mol of gas and which comes out to be 22.4 L. hope this helps

Answer:

Volume of the gas is 90.2 ml

Explanation:

Given:

Initial volume, V1 = 80.0 ml = 0.080 L

Initial pressure, P1 = 109 kPa = 1.076 atm ( 1 kPa = 0.00987 atm)

Initial temperature, T1 = -12.5 C = -12.5 + 273 K = 260.5 K

Under STP conditions i.e. standard temperature and pressure we have:

Pressure, P2 = 1 atm

Temperature, T2 = 273 K

Formula:

Based on the ideal gas relation we have:

[tex]\frac{P1V1}{T1} =\frac{P2V2}{T2} \\\\V2 = \frac{P1V1}{T1} (\frac{T2}{P2} ) = \frac{1.076*0.080}{0.260.5} (\frac{273}{1} )=0.0902 L[/tex]

starfish , squid , sea turtle are the only ones i know

Answer:

Collecting residue samples.

Explanation:

All the other given options are equally important on the exploration of a bomb aftermath.

The most important task is the collection of residue samples since it needs highly skilled personel to collect accurate samples for later on analysis.

Identification of meaningful collection areas is a technical skill that requires the most experienced team memebers.

Answer: Collecting residue samples from the scene.

Explanation:

Collection of the residues after the explosion will be the most important task that is required to be done immediately this is because of the fact that the explosive residues at the site of the crater may consists of residues which may contain both volatile and non-volatile substances which are likely to be blown away soon after explosion. Thus if not collected in proper time the type of explosive used for explosion will remain undetected.      

E = m × c × θ,

The basic cell is a neuron

It should be an Ion. Sorry.

The atom with 24 protons, 20 electrons, and 28 neutrons is a chromium ion with a +4 charge and a mass number of 52.

An atom with 24 protons is an atom of the element chromium (Cr), which has an atomic number of 24. The atomic number represents the number of protons in the nucleus and defines the type of element. In a neutral atom, the number of protons equals the number of electrons, but this atom has 20 electrons, which means it has a +4 charge, making it a chromium ion. Furthermore, it has 28 neutrons, and the mass number of an atom is the sum of its protons and neutrons. This gives the chromium atom in question a mass number of 52 (24 protons + 28 neutrons).

No.

Since Boron is a poor conductor of electricity it is non-reactive. For that case it is still water soluble.  

Not the right answer or confused? Reply to this question for help.

No, it is a poor conductor of electricity

The answer would have to be “move fast and far apart.”

I really hope this helps you.

This is FALSE

The soil would be almost infertile after all the magma and heat. It cannot grow crops and plants will not be able to survive. It becomes 'baked' and therefore is very hard to grow ANYTHING

However after a period of time, the soil can make use of volcanic nutrients and grow lush plants (but this is after a while)

After a volcanic eruption, it is nearly impossible for plant life to grow due to the poor soil is a false statement.

A volcanic eruption is when lava and gas are released from a volcano—sometimes explosively.

After a volcanic eruption,the soil in this region is rich because volcanic eruption deposits the necessary minerals, which are then weathered and broken down by rain. Once absorbed into the soil, they become a steady supply of nutrients for plant life.

Hence, the correct answer is false.

Learn more about the volcanic eruption here:

#SPJ2

Answer:

second class

Explanation:

Best Answer:  Total number of moles n = PV/RT = (12.5atm x 10L)/(0.082 x 298K) = 5.1154 mole  

30g of oxygen = 30g/32g/mol = 0.94 mole. Also 30g of nitrogen = 30g/28g/mole = 1.07 moles.  

Let the number of moles of CO2 be = c,  

0.94 + 1.07 + c = 5.1154. Hence c = 3.105 mole = number of moles of CO2  

Mass of CO2 = 3.105 moles x 44g/mole = 136.62g ~ 137g

The correct answer is - b. If available resources decrease, then competition will increase.

All living organisms in an ecosystem are specialized in accordance to the living conditions and the food sources available. If a given ecosystem experiences prolonged drought, than the resources will decrease. With a decrease in resources, the living organisms will find themselves in a situation of scarcity. That will lead to a much increased competition, with both organisms of different species, and members of the same species. That will most likely lead to a situation where only the fittest will survive, while the weaker members of the species will probably die in that period of prolonged drought as they will not be able to get the resources they need to survive.

Answer:

B because animals would fight over food and water more to survive

Explanation:

the law that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.

Ideal Gas Law has been described below.

According to Ideal gas law , the product of Pressure and Volume for 1 mole of an ideal gas is equal to the product of Temperature and Universal Gas Constant R

The equation is represented by

PV = nRT

It is valid only for ideal gases and no gas is ideal, At STP all the gases are considered to behave ideally.

It is a combination of the empirical Boyle's law, Charles's law, Avogadro's law, and Gay-Lussac's law.

It relates the macroscopic properties of gases.

It has wide applications in the processes where gas is involved.

To know more about Ideal Gas Law

https://brainly.com/question/13821925

#SPJ2

as water is cooled it's density increases until about 4 c then it decreases

Answer:

As water is cooled its density increases 4 degrees Celsius is reached

Explanation:

Final answer:

To find the chlorine concentration in the solution, the moles of chlorine from CaCl₂ and MgCl₂ are calculated and summed. The total chlorine mass is then determined and divided by the solution volume in liters, resulting in a concentration of 18.45 g/L.

Explanation:

To calculate the concentration of chlorine in the solution prepared by mixing 2g of CaCl₂, 2g of MgCl₂, and 3g of MnO₂ in a total volume of 150 mL, first, we need to determine the amount of chlorine present in each compound. Calcium chloride (CaCl₂) and magnesium chloride (MgCl₂) each have two moles of chlorine per mole of compound, while manganese dioxide (MnO₂) has no chlorine.

Molar mass of CaCl₂ = 110.98 g/mol

Molar mass of MgCl₂ = 95.21 g/mol

Amount of chlorine from CaCl₂:

• (2 g CaCl₂) / (110.98 g/mol) = 0.01802 mol CaCl₂ × 2 mol Cl⁻/mol = 0.03604 mol Cl⁻

Amount of chlorine from MgCl₂:

• (2 g MgCl₂) / (95.21 g/mol) = 0.02101 mol MgCl₂ × 2 mol Cl⁻/mol = 0.04202 mol Cl⁻

Total moles of Cl⁻ = 0.03604 mol + 0.04202 mol = 0.07806 mol

Finally, to find the concentration of chlorine in g/L:

• (0.07806 mol Cl⁻) × (35.45 g/mol) = 2.767 g of Cl⁻

• Since the total volume is 150 mL, or 0.15 L, the concentration is (2.767 g / 0.15 L) = 18.45 g/L.

Answer:

b. Absolute

Explanation:

Absolute dating is a method used by scientists to determine the age of objects by evaluating the properties of its atoms, it is also called chronological and calendar dating, since absolute refers to a certainity that the scientists can not warantee when it comes to how long has an object has bein on a certain place.

Absolute dating uses the decay properties of isotopes in rocks to find their exact ages. It depends on radiometric methods and half-lives of isotopes, unlike relative dating, which only arranges rocks in age order. Option b is correct.

The correct answer to the question is  Absolute dating,' which utilizes the properties of atoms within rocks and other objects to accurately determine their ages. Absolute dating methods are based on radiometric dating, which involves measuring the rate of decay of unstable isotopes, such as uranium or argon, to estimate the precise age of rocks and fossils.

Radiometric dating relies on the concept of a half-life, which is defined as the time required for half of a sample of a radioactive isotope to decay into its daughter isotope. Using the known half-lives of various isotopes, scientists can calculate the age of a rock or fossil with precision. Unlike relative dating, which only provides a sequence or comparison of ages, absolute dating assigns a specific numerical age.

For instance, while relative dating can tell us that one layer of rock is older than another, absolute dating can establish that a rock is 150 million years old. This method is paramount in geology for constructing accurate timelines of Earth's history.

Water vapor in the air

Answer:

The answer is water vapor.

Explanation:

In a sample of MgCl2, there are 6 moles of chlorine for every 3 moles of MgCl2. Two moles of H2O are required to produce 1 mole of O2. One mole of H2 gas contains 2 moles of hydrogen atoms, and there are 6.02 x 10^23 atoms or molecules in a mole.

To answer your questions about moles and stoichiometry:

Answer:

octahedral

Explanation:

Six bonding pairs around a central atom result in an octahedral. Hence, option D is correct.

Octahedral molecules contain six atoms bonded to the central atom and no lone electron pairs, making the steric number equal to six.

VSEPR theory was first coined by Gillespie and Nyhlom in 1957 as an improvement over the Sidgwick - Powell theory.

According to this theory, the shape of a molecule is determined by the number of electron pairs that surround the valence shell of the central atom in the molecule.  The electron pairs are positioned as far apart in space as possible to minimize the repulsion of electron pairs.

However, the presence of lone pairs distorts the shape anticipated for the molecule on the basis of VSEPR.

For a molecule having six electron pairs, an octahedral geometry is expected(electron domain geometry).

Hence, option D is correct.

Learn more about the octahedral structure:

https://brainly.com/question/11856948

#SPJ5

mass - hope this helps!!

The answer is Mass☺️.

The molecular weight of NaCl is 58.5 g/mol. 737 g/58.5 g/mol = 12.6 mol. So, there are 12.6 moles of NaCl in the box.

Taking into account the definition of molar mass, 12.61 moles are in 737 grams of NaCl.

But first, the molar mass of a given substance is a physical property defined as the mass of one mole of a substance, which can be an element or a compound.

In a compound the molar mass is equal to the sum of the weight or atomic mass of its atoms multiplied by its quantity; that is, the molar mass of the elements of the compound must be added multiplied by the times they appear.

In this case, the atomic mass of the elements of the compound are:

Then the atomic mass of the compound NaCl is:

NaCl= 23 g/mole + 35.45 g/mole

NaCl= 58.45 g/mole

Then you can apply the following rule of three: if by definition of molar mass 58.45 grams of the compound are contained in 1 mole, 737 grams are contained in how many moles?

[tex]amount of moles=\frac{737 gramsx1 mole}{58.45 grams}[/tex]

amount of moles= 12.61 moles

In summary, 12.61 moles are in 737 grams of NaCl.

Learn more:

Mendeleev i guess. The answer is C

Answer:   C. Dmitri Mendeleev

Explanation:  Dmitri Mendeleev was the first scientist who initiated the arrangement of elements in the regular pattern which is known as the Periodic table of Elements.

He tried to arrange these elements on the basis of the chemical properties and on the basis of their atomic number.

Atomic number was considered as the basis of the periodic table as it is the most basic and essential property of the elements.

The functional group of aldehyde is - COH

This group is attached to another carbon chain  giving the hydrocarbons that  contain this functional group  the general formula: R-COH

The functional group gives the aldehydes their chemical properties as it can be displaced during reactions to form new compounds.

Answer:

- COH

Explanation:

Answer:  Because of the property known as Catenation.

Explanation:  Catenation is the property of making molecules by self linkage.

This is the property mostly exhibited by the carbon. Thus it is famous for creating large molecules or large chains of carbon and hydrogen atoms.

This property is also exhibited sulfur of the chalcogen family.

The structure of a carbon atom enables it to form large molecules as it can form four chemical bonds to the other atoms as well. It usually forms covalent bond by sharing of the electrons.

Answer: Options A and E

Explanation: since A is non electrolyte , doesn't form any ions in aqueous solution. Hence non conducting and distilled water is pure without any ions and has only neutral water molecules. Hence it is non conducting substance.

And remaining all are ionic compounds and gives ions in aqueous solution and conduct the electricity. Hence they all acts as conductors.

Answer:

sucrose C12H22O11 and distilled water

The substances that influence the rate of reaction are usually one or more of the reactants, but can occasionally include products. ... The rate law is experimentally determined and can be used to predict the relationship between the rate of a reaction and the concentrations of reactants.

The rate law uses the molar concentrations of reactants to determine the reaction rate.

A catalyst is a substance that allows the chemical reaction to occur at a faster rate or under different conditions (e.g. at a lower temperature) without being affected by the reaction.

The substances that influence the rate of reaction are usually one or more of the reactants, but can occasionally include products.

The rate law is experimentally determined and can be used to predict the relationship between the rate of a reaction and the concentrations of reactants.

The rate law uses the molar concentrations of reactants to determine the reaction rate.

Typically, increased concentrations of reactants increase the speed of the reaction, because there are more molecules colliding and reacting with each other.

Learn more about the catalyst here:

brainly.com/question/18959742

#SPJ2

In order for a cellular change to be inherited, this change must be present in the male gamete, or sperm or present in  the female gamete, the egg or ovum. This is due to the fact that a baby is created from the fusion of an egg and sperm. Therefore, choice 2,  the deletion of a single DNA base in a sperm cell of a trout, is the correct answer.  

If we think about it logically, cellular changes in other parts of body should not affect the next generation. For example, if mom has skin cancer, it does not mean at all  that the baby will have it as well.

no charge

this is because protons have a charge of 1+ and electrons have a charge of 1- so if there is an equal number of them, their charges cancel each other out and make the atom have a charge of 0, which means no charge

Answer: An atom with an equal number of electrons and protons has no charge

Explanation: The charge of an atom comes from the electrons and protons present. Electrons have a charge of 1- and protons have a charge of 1+. When the number of electrons and of protons are equal, an atom has no overall charge.