H is a chemical
and H2 is a chemical
.

Answer: The correct option is D (Powders have more surface area and will dissolve faster).

Explanation:

For a scientist to investigate whether a powered pill will dissolve faster than a solid pill is putting the rate of the reaction under study.

Rate has to do with what is achieved per unit time. One of the factors affecting rates of chemical reaction includes the SURFACE AREA.

Reagents in solution tend to react faster than reagents in solid form. This is because molecules are freer to move about and collide more effectively in solutions. For solids, the more the surface area exposed for reaction the faster the reaction. For example, a lump of Zinc will not react as fast as powdered zinc with dilute hydrochloric acid to produce hydrogen.

Therefore, with the above explanation and example concerning surface area in a chemical reaction, the hypothesis the scientist should develop is that powers which has more surface area will dissolve faster than the soils pills.

Answer:

The correct option is D (Powders have more surface area and will dissolve faster).

Explanation:

Answer:

7.89 grams of phosphorus reacts with 45.15 grams of chlorine

Explanation:

For reacting with 2 mole of P react with 5 mole of Cl2 gas

Molecular weight of phosphorus = 30.97

Molecular weight of 2 mole of phosphorus = 2 * 30.97 = 61.94 grams

Molecular weight of Chlorine molecule = 70.9 grams

Weight of 5 moles of Chlorine molecule = 5 * 70.9 grams = 354.5 grams

61.94 grams of phosphorus reacts with 354.5 grams of chlorine

7.89 grams of phosphorus reacts with 354.5/61.94 * 7.89  grams of chlorine

7.89 grams of phosphorus reacts with 45.15 grams of chlorine

Answer:

36.5 g CO2

Explanation:

First, Write a Balanced Equation  

C   + 2 ZnO → CO2  + 2 Zn

Useful Information,  

MW of ZnO = 81.41 g

MW of CO2 = 44.01 g

135 g ZnO x (1 mol ZnO /  81.41 g ZnO) x (1 mol CO2/2 mol ZnO) x ( 44.01 g CO2 / 1 mol CO2 ) = 36.5 g CO2

Answer:

The answer is 0.013413582325191. i assume you are converting between moles Potassium Chloride and gram. The molecular formula for Potassium Chloride is KCl. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Potassium Chloride, or 74.5513 grams.

Explanation:

Answer:

Voltage.

Explanation:

Voltage is the force or pressure of electricity and is compared to the amount of water pressure in a hose.

Answer:

Voltage is the force or pressure of electricity and is compared to the amount of water pressure in a hose.

Answer:

Given : No. Of moles = 1.5

To calculate : no. Of molecules =N

We know that moles = N / 6.022 x 10²³

Therefore, 1.5 x 6.022 x 10²³ = N

Hence N = 9.0330x 10²³ molecules

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Answer:

0.584 J/g°C

Explanation:

Using the formula as follows;

Q = m × c × ∆T

Where;

Q = amount of heat (joules)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

According to the information in this question;

mass of substance (m) = 1050g

Initial temperature = 25.7°C

Final temperature = 30.4°C

amount of heat (Q) = 2880J

change in temperature (∆T) = (30.4°C - 25.7°C) = 4.7°C

Using Q = m.c.∆T

c = Q ÷ m∆T

c = 2880 ÷ (1050 × 4.7)

c = 2880 ÷ 4935

c = 0.584 J/g°C

The specific capacity of the substance is 0.584 J/g°C.

Answer:

Glossopteris

Explanation:

Glossopteris is a fossil fern that helped support Wegener's hypothesis.

Hope this helps! Have a great day!

Answer:

pOH = 5.32

Explanation:

What is the pOH...

The pOH of a solution is defined as:

-log [OH⁻] The -log of hydroxide ion concentration in molarity units

It is used to find pH of a solution because: pH = 14-pOH

Thus, the pOH of the solution of the problem is:

pOH = -log [OH⁻] = -log [4.82x10⁻⁶M]

pOH = 5.32

Answer:

C4H6O3 + H2O → 2C2H4O2

C2H4 + 3O2 → 2CO2 + 2H2O

2C4H10 + 13O2 → 8CO2 + 10(H2O)

Explanation:

Answer: is this what your looking for?

Explanation: One mole of anything, no matter what the element is, is Avogadro's number, which is 6.02 * 10^23 atoms.

One mole of Calcium is equal to it's atomic weight in grams :

1 mole Ca = 40.08 g = 6.02 * 10^23 atoms

There is a 1000mg in a gram. 1000mg * 40.08g =  

=40,080mg of Ca per mole

If you have 8.6mg of Ca that is 8.6mg / 40,080mg = .00021457 of a mole of calcium

so just multiply that by Avogadro's number to give you number of atoms:

.00021457 * 6.02 * 10^23 atoms = 1.292 * 10^20 atoms of Ca

A mole is the amount (10) of material containing [tex]6.02214 * 10^{23}[/tex] particles.

1 mol =  [tex]6.02214 * 10^{23}[/tex] particles. This number is also called Avogadro's number

One mole of Calcium is equal to it's atomic weight in grams :

[tex]\text{1 mole Ca} = 40.08 g = 6.02 * 10^{23} \text{ atoms}[/tex]

a) 1g=1000mg

[tex]1000\text{ mg} * 40.08g = 40,080 \text{ mg of Ca per mole}[/tex]

If you have 8.6mg of Ca that is

[tex]\frac{8.6mg}{40,080mg} =0 .00021457 \text{ mole of Ca}[/tex]

In terms of Avogadro number:

[tex]0.00021457 * 6.02 * 10^{23} atoms = 1.292 * 10^{20} \text{ atoms of Ca}[/tex]

b) The number of moles of H₂O will be:

[tex]3.4*10^{26}*6.022*10^{23}\\\\20.47*10^{49} \text{moles}[/tex]

Learn more:

brainly.com/question/1358482

Answer:

pH = 2.4

Explanation:

pH is defined as the negative log of the hydronium concentration.

Thus, we can plug in the given hydronium concentration:

pH = -log[H⁺] = -log[0.0042] = 2.4 (two significant figures)

The pH of the solution is 2.4.

P.S: Although I referred to [H⁺] as hydronium concentration, it is more accurate to express it as [H₃O⁺], though they are interchangeable and means the same thing.

Answer:

The answer is 18.01528.

We assume you are converting between grams H2O and mole.

Explanation:

Answer:

The answer was be 1-chloro-1-butyne

Explanation:

In other words the answer is option letter A

You welcome have a nice day.

The name of the given alkyne, CH₃CH₂C = C – CI is 1 chloro 1 butyne.

The correct option is A.

Alkynes are unsaturated hydrocarbons, that have carbon-carbon triple bonds.

Chlorobutyne is colorless and is liquid at room temperature and pressure.

It is polar, but still slightly soluble in water.

Thus, the correct option is A, 1 chloro 1 butyne.

Learn more about 1 chloro 1 butyne.

https://brainly.com/question/26210366

Answer:

0.0107 mol

Explanation:

Multiply concentration by volume (in liters) to get moles.

0.5 M • 0.0213 L = 0.0107 mol

Answer:

c?

Explanation:

Answer:

I think both

Explanation:

Answer: the answer Is d

Explanation:

The question that readers should  ask to determine the effect in the sentence is that what happens when more stuff gathers?

Sentence is defined as a group of words, usually containing a subject and a verb, expressing a statement, question, instruction, or exclamation, and, when written, starting with a capital letter and ending with a period or other mark, example, Your sentences are too long and complicated.Many sentences written together form a paragraph.

In law, a punishment  is which is given by a law court to a person or organization that is guilty of a crime. It is a grammatical unit of one or more words that expresses an independent statement, question, request, command, exclamation, etc.

In print or writing, a sentence typically begins with a capital letter and ends with appropriate punctuation; in speech it displays recognizable, communicative intonation patterns and is often marked by preceding and following pauses.

Learn more about sentence,here:

https://brainly.com/question/16890064

#SPJ6

Answer:

0.287 M

Explanation:

Multiply the concentration of each solution by the volume of each (in liters) to get the moles of NaOH in that solution.

0.15 M • 5.4000 L = 0.81 mol NaOH

4.0 M • 0.2012 L = 0.80 mol NaOH

Add the mol of NaOH together to get the total --> 0.81 + 0.80 = 1.61 mol NaOH

Divide by the total volume of solution (5400.0 mL + 201.2 mL = 5,601.2 mL = 5.6012 L)

1.61 mol / 5.6012 L = 0.287 M NaOH

Answer:

The hot temperature of inner core and outer core is responsible for the production of magnetic field.

Explanation:

The physical properties of the inner core, outer core, and lower mantle are essential for the development of Earth's magnetic field because the very high temperature of inner core is responsible for the formation of magnetic field. If the inner core is not very hot so the magnetic field will not be generated and our earth's atmosphere will not be save from the solar wind. It can be blown away by the solar wind if this magnetic field is not present so we can conclude that the physical properties of inner core and outer core is important for the production of magnetic field.

Answer:

Explanation:

what did you get?

Answer:

The answer is C. substance

Explanation:

I did this on study island and got it right, hope you enjoy.

Answer:

CuCI2 is the answer.......