Using dimensional analysis, convert 500.0 calories into joules.

Answer:

B. is false

Explanation:

-there is no cure for hsv,

-herpes simplex I does affect the face as a cold sore, and herpes simplex II does affect the genitals

- a symptom of herpes can be flu like symptoms, everyone is different, some people don't even have any symptoms at all

The net ionic equation of potassium hydroxide and perchloric acid combined in aqueous solutions is

H⁺ + OH⁺ → H₂O

Step 1: Complete the equation, write the correct chemical formula for each compound both in reactant and product  

Step 2: Separate the compounds in ionic form.

Step 3: Stike out the common element in the product and the reactant side.

Demonstration: KOH (aq) + HCLO₄ (aq) → KCLO₄(aq) + H₂O(lq)

Total ionic equation: K⁺ + OH⁻ + H⁺ + CLO₄ → K⁺ + CLO₄ + H₂O

Net ionic equation: H⁺ + OH⁻ → H₂O

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The volume of the palladium is 103.3 cubic centimeters.

The term density has to do with the ratio of the mass to the volume of a substance. We can see here that the density of the palladium has been given as 12.1 g/cm3. However, the mass of the substance has been given in ounces.

We know that;

1 ounce = 28.35 grams

44.1 ounces = 44.1 ounces  * 28.35 grams/1 ounce

= 1250.23 g

Density = mass/volume

volume = mass/Density

volume = 1250.23 g/12.1 g/cm3

volume = 103.3 cubic centimeters

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The interdependent relationship between advances in technology and scientific discoveries has enhanced our understanding of the universe. schooling, merchandising, and different multidisciplinary efforts by way of fostering higher information about the multidimensional nature of research.

Development in technological know-how and technology studies seeks to improve the techniques of technology and technology studies, Clinical expertise is used to create new technologies. New technology regularly allows scientists to explore nature in distinct ways and make new discoveries.

Technological know-how is the have a look at the natural world through a scientific approach i.e. collecting facts via a systematic procedure. And era is in which we observe science to create gadgets that can solve issues and perform distinct responsibilities. technology is literally the utility of science.

Society drives technological improvements and scientific inquiry. technology offers us a perception of what form of technology we should doubtlessly create and a way to create them, even as technology allows us to behave in addition to medical studies.

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The body's muscles become increasingly paralyzed as a result of tetrodotoxin's interference with the signaling process from nerves to muscles. Toxic exposure to tetrodotoxin may be lethal.

Scrub all right, had to drink a poisonous substances that paralyzes body resulting in death.

Tetrodotoxin (TTX), a neurotoxin, is extremely poisonous.

Tetrodotoxin is a sodium channel blocker. It stops neurons from firing action potentials by clinging to the voltage-gated sodium channels in nerve cell membranes and obstructing sodium ions from entering the neuron, which are crucial for an action potential's rising phase.

Due to the neurological system's inability to communicate, muscles are unable to contract in response to nerve inputs. It works by selectively blocking sodium channels.

The majority of its occurrences are in the livers and sex organs of several fish species, such as puffer fish, globefish, and toadfish (order Tetraodontiformes) (gonads).

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Answer:

The moles of ammonia present will be "0.274 moles".

Molar mass:

A particular element's molar mass would be the mass of either the material that contains 1 mole of material. It should be the weight of such mole of something in basic words.

To determine the molar mass, multiply the atomic mass per each substance by the component's subscript throughout the chemical equation.

Given:

Weight in grams, w = 4.652 g

Molar mass, m = 17.030 g/mol

We know,

→ Number \ of \ moles (n)= \frac{Weight(w)}{Molar \ mass(m)}Number of moles(n)=

Molar mass(m)

Weight(w)

By substituting the values,

n = \frac{4.652}{17.030}n=

17.030

4.652

= 0.274=0.274 moles

Thus the response above is right

Li lose one electron to acquire an electronic configuration. I must accept one electron, N accept three electron and Al lose three electron to acquire noble gas electronic configuration.

For Li,

Li belongs to first group of the periodic table and have 3 as atomic number. So, it lose one electron to acquire stable electronic configuration like as Helium.

For I,

I belongs to 17th group of the periodic table and have 53 as atomic number. So, it accept one electron to acquire stable electronic configuration like as Xenon.

For N,

N belongs to 15th group of the periodic table and have 7 as atomic number. So, it gain three electron to acquire stable electronic configuration like as Neon.

For Al,

Al belongs to 3rd group of the periodic table and have 13 as atomic number. So, it lose three electron to acquire stable electronic configuration like as Neon.

Thus, we concluded that Li lose one electron to acquire an electronic configuration. I must accept one electron, N accept three electron and Al lose three electron to acquire noble gas electronic configuration.

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5.845 mg of table salt provides the upper safe limit  in the recommended daily requirement of sodium.

Molar mass of common table salt that is sodium chloride is         23.0+35.5=58.5 g/mole which is the addition of molar masses of sodium and chlorine,the constituents of sodium chloride.

As the common table salt is 39.3% sodium by mass therefore it has 23.01975 g or 23019.75 mg of sodium.

                      39.3/100×58.5=23019.75

As 58.5 g of sodium chloride has 23.019 g of sodium therefore 2.3 g of sodium is present in 5.845 g, which is 5.845×10[tex]^-3[/tex]mg.

                 2.3×58.5/23.019=5.845 mg.

Mass percent of any compound is usually calculated as mass of the compound divided by it's total mass and then multiplied by hundred.It is a way of expressing concentration of a component.It describes how much solute is present in 100 grams of solution.

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Based on the specific gravity of granite, the weight density of granite is 174.72 lbs/ft³.

The specific gravity of a substance is the ratio of the density of the given substance to that of the ratio of a reference substance usually water.

Specific gravity is also known as relative density of that substance.

Specific gravity is dimensionless since it is the ratio of two similar quantities.

Considering the given data:

The specific gravity of granite is 2.80.

This means that the ratio of the weight density of granite and that of water is 2.80.

The weight density of water = 62.4 lbs/ft³

The weight density of granite = ?

2.80 = weight density of granite/ weight density of water

The weight density of granite = 2.80 * weight density of water

The weight density of granite = 2.80 * 62.4 lbs/ft³

The weight density of granite = 174.72 lbs/ft³

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The elements involved could be ba--rium and strontium.

We know that the ionization energy refers to the energy that must be supplied in order for an electron to leave the atom. The energy could bee supplied in the form of heat or light.

In the question, we have the first four ionization energies of the elements X and Y. The lower first and second ionization energies suggest that the electrons are removed from the outermost shells and that the two elements are divalent. That explains the quantum jump that occurs after the second ionization energy in each case.

The low first and second ionization energies implies that the elements are highly electropositive and are likely to be ba--rium and strontium.

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Answer:

Mass of phosphorus = (435kg)(0.01) = 0.45 kg

The equilibrium constant is 0.026.

Let us recall that the equilibrium constant is a number that shows us the extent to which reactants are converted into products. In other words, a large positive value of the equilibrium constant indicates that most of the reactants have been converted into products.

Initial concentration of A =  0.880 mol /3.00 L = 0.29 M

Equilibrium concentration of C = 0.150 mol /3.00 L = 0.05 M

We can set up the ICE table thus;

        2A(aq)   ⇄   2B(aq)  +   C(aq)

I      0.29 M         0                  0

C       -2x               +2x            +x

E   0.29 - 2x         2x                0.05 M

Where

x = 0.05

At equilibrium;

[A] =    0.29 - 2(0.05 ) = 0.19 M

[B] = 2(0.05) = 0.1 M

[C] = 0.05 M

K = [B] [C] /[A]

K = 0.1 * 0.05/ 0.19

K = 0.026

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Answer:

Synthesis reaction

Explanation:

In synthesis reactions, two or more atoms/molecules combine to form a larger molecule.

These reactions follow the general structure: A + B <-----> AB.

The facts you find in reference source that support your data in an experiment​ is known to be called research.

Research is known to be a term that is defined as as  a kind of "creative and methodical form of activity done to improve the body of knowledge.

It entails the objective gathering, organizing, and analysis of data in order to improve comprehension of a subject or issue.

The Research is described as the thoughtful analysis of studies pertaining to a certain issue or problem utilizing scientific methodologies.

Therefore, since Research is a methodical inquiry, one can say that he facts that you find in reference source that support your data in an experiment​ is known to be called research.

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E. The  oxidation number of chlorine with 14 electron is written as 17, 37 CL⁺³.

Oxidation number of an atom/ion is the number of electrons an atom/ion that the molecule has either gained or lost compared to the neutral atom.

Chlorine is a non metal with atomic number of 17 (17 electron, and 17 proton).

Chlorine also has an oxidation number of -1.

When the number of electron of the chlorine has been reduced to 14, it implies that the chlorine ion has been reduced by losing 3 electrons.

The oxidation number of chlorine with 14 electron is written as follows;

= CL (14) = 17 CL⁺³

mass number = 17 + 20 = 37

= 17, 37 CL⁺³

Thus, the  oxidation number of chlorine with 14 electron is written as 17, 37 CL⁺³.

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If 7.50 mol of NH₃ and 8.15 mol of O₂ react in the following reaction. The number of moles of H₂O that will be formed is 9.84 moles.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

Using the molar coefficients in the balanced equation, 6 moles of water are formed for every 4 moles of NH₃.

6 moles of water are formed for every 5 moles of O₂.

So (7.5 moles NH₃)(6 moles H₂O)/4 moles NH₃) = 11.25 moles water

For (8.20 moles O₂) / (6 moles H₂O)(5 moles O₂) = 9.84 moles H₂O.  

So O₂ is the limiting reagent, and we can only make as much product as allowed by the limiting reagent.

Thus, the number of moles is 9.84 moles of water.

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its correct

Answer:

Organic compound features:

Explanation:

Complex structures

High molecular weights

Depend on Carbon, Hydrogen and Water

Combustile in nature

Form covalent bonds

Low melting and boiling points

The mass of ZrCl₂ needed to prepare the solution, given the data is 30.98 g

We'll begin by obtaining the mole of ZrCl₂. This can be obatined as follow:

Mole = Molarity x Volume

Mole of ZrCl₂ = 1.25 × 0.153

Mole of ZrCl₂ = 0.191 mole

We can obtain the mass of ZrCl₂ needed to prepare the solution as follo:

Mass = mole × molar mass

Mass of ZrCl₂ = 0.191 × 162.22

Mass of ZrCl₂ = 30.98 g

Thus, the mass of ZrCl₂ needed to prepare the solution is 30.98 g

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A sample of 25.0-g pure iron at the 85 °C is dropped into 75 g of water at 20°C.  22.25 °C is the final temperature of the water-iron mixture.

The specific heat equation is represented as

Q = mcΔT

where,

Q = heat energy in Joules

m = mass of substance

c = specific heat

ΔT = change in temperature in K

For iron given that

m = 25 g

c = 0.45 J/g°C

T₁ = 85°C

Now by putting the values in the above formula then we get

Q₁ = mcΔT

    = 25 × 0.45 × (T₂ - 85)

    = 11.25 × (T₂ - 85)

For water given that

m = 75 g

c = 4.184 J/g°C

T₁ = 20°C

Now,

Q₂ = mcΔT

     = 75  × 4.184 × (T₂ - 20)

     = 313.8 × (T₂ - 20)

Now,

Heat is generated by the iron = Heat is gained by the water.

Q₁ = -Q₂

11.25 × (T₂ - 85) = - 313.8 × (T₂ - 20)

325.05 T₂ = 7232.25

T₂ = 22.25 °C

22.25 °C is the final temperature of the water-iron mixture.

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Sea level may rise as a result of the expansion of seawater and the melting of land-based ice due to a warming environment.

The sea level is the fundamental level for calculating height and depth on Earth. Since the ocean is one continuous body of water, its surface tends to seek a constant level. The sea surface is not actually level due to winds, currents, river discharges, fluctuations in gravity, and temperature.

People are impacted by sea level changes through flooding, the inability of rivers to empty into the ocean due to the sea being too high, and the surge of seawater onto the land during storms. Our drinking water and the ability to cultivate crops could be harmed if sea water gets into farms and reservoirs.

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The number of atoms of nitrogen in an 80.0 g sample of dinitrogen tetroxide (N₂O4) is 1.047 * 10²⁴ atoms.

The number of nitrogen atoms in an 80.0 g sample of dinitrogen tetroxide (N₂O4) is calculated as follows:

Molar mass of N₂O4 = 92 g/mol

Moles of N₂O4 in 80.0 g sample = 80/92

Moles of N₂O4 in 80.0 g sample =0.87 moles

Moles of nitrogen in the sample = 0.87 * 2

Moles of nitrogen in the sample = 1.74 moles

1 mole of nitrogen contains 6.0 * 10²³ atoms

Number of atoms of nitrogen = 1.74 * 6.0 * 10²³ atoms

Number of atoms of nitrogen = 1.047 * 10²⁴ atoms

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Answer:

Cobalt(III) Borate CoBO3 Molecular Weight -- EndMemo.

Explanation:

First we will balance the given equation:

NaBH4 (s) + BF3(g) B₂H6(g) + NaBF4(s)

Balanced equation:

3NaBH4 (s) + 4BF3(g) 2B₂H6(g) + 3NaBF4(s)

ii) 4 moles of BF3 reacts with 3 mole of NaBH4

1 mole of BF3 reacts with 3/4 = 0.75 mole of NaBH4

so the 1.299 moles of BF3 will react with 1.299× 0.75 = 0.974 moles of NaBH4

iii) 3 moles of NaBH4 gives 2 moles of B2H6

1 mole of NaBH4 gives 2/3 = 0.6 moles of B2H6

so, 0.893 mole of NaBH4 will give 0.893 × 0.6 = 0.535 molesof B2H6.

iv) 2 moles of B2H6 is produced with 3 moles of NaBF4

if 1 mole of B2H6 is produced then 3/2 = 1.5 moles of NaBF4 is produced with it.

so is 1.987 mol of B2H6 is obtained then 1.987 × 1.5 = 2.98 moles of NaBH4 will be obtained.

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Answer:

same number of protons but different number of neutrons.