What is an example of equilibrium?
O the release of a gas product from an open system
O the partial dissolution of salt crystals in saturated water
O the combustion of gasoline in a car engine
O the mixing of oil and water in a closed container

Answer:

Partial pressure is proportional to the number of moles so: partial pressure = total pressure x mole fraction. Let's calculate total pressure first. We know the volume in liters and the temperature. We can also find the number of moles of each gas by conversion.Mar 25, 2019

Answer:

ugh this wont save anyway i think i'm just checking if ill save

Explanation:

if i does C both

hope this helps

The correct selection for 4-octyne structure is A. Hence option A is correct.

Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and the elements in the periodic table.

Molecule is made up of atoms, it is formed when two or more atoms bound together. The electrons in the outermost orbit are responsible for the molecule formation. Electrons are shared by the atoms in the entire molecule.

4-Octyne, also known as dipropylethyne, is a type of alkyne with a triple bond at its fourth carbon. its chemical formula is C₈H₁₄.

C₈H₁₄ are bounded like . CH₃CH₂CH₂-C ΞC-CH₂CH₂CH₃

Hence option A is correct.

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hold the syringe downward,shake vigorously for sometime,and expel the bubbles through the needle using the syringe plunger. hold the syringe upright, provide a firm tap or flick to the barrel

Answer:
a. 1 x 10^8

Explanation:

100 MHz = 100,000,000 Hz = 10^8 Hz

Tribasic Potassium Phosphate + Calcium Nitrate = Tuite + Potassium Nitrate

2 moles of aqueous Tribasic Potassium Phosphate react with 3 moles of aqueous Calcium Nitrate to form 1 mole of solid Tuite and 6 moles of aqueous Potassium Nitrate

Reaction Type

Double Displacement (Metathesis)

Net Ionic Equation

2K3PO4 + 3Ca(NO3)2 = Ca3(PO4)2 + 6KNO3 might be an ionic equation. Calculate the net ionic equation for 2K3PO4(aq) + 3Ca(NO3)2(aq) = Ca3(PO4)2(s) + 6KNO3(aq).

Redox (Oxidation-Reduction) Reaction

K3PO4 + Ca(NO3)2 = Ca3(PO4)2 + KNO3 might be a redox reaction.

Reactants

Tribasic Potassium Phosphate - K3PO4

E340Iii E340(Iii) Potassium Phosphate Tripotassium Phosphate K3PO4 Molar Mass K3PO4 Oxidation Number

Calcium Nitrate - Ca(NO3)2

Saltpeter Lime Nitrate Lime Saltpeter Norge Saltpeter Norway Saltpeter Calcium Saltpeter Norwegian Saltpeter Anhydrous Calcium Nitrate Ca(NO3)2 Molar Mass Ca(NO3)2 Oxidation Number

The answer is: " 480 mL of [2.50 M K₂SO₄] solution."

____________

Explanation:

Given :
1.20 mol K₂SO₄   ⇒   __?  mL __  of 2.50 M K₂SO₄  ;
____________
Note: 2.50 M  K₂SO₄ = 2.50 mol/ L ;

____________

1.20 mol  =  [tex]\frac{1 L}{2.50 mol}[/tex] ;

The units of "mols" cancel;  since "mol / mol = 1 ;

and we have:  " [tex]\frac{(1.20*1) L}{(2.50)} = [{\frac{1.20}{2.50}}] L = (0.480) L ;[/tex]  
 
 →  {Note: we want to keep the appropriate number of "significant figures"; so we write our answer:  "0.48 L" ;  as:  "0.480 L" .

 → Now, we want to solve for the number of "mL ("milliliters").
 →Note the exact conversion:   "1000 mL = 1 L ;

So:  ("0.480 L") * (1000) = " 480 mL of solution." → which is our answer.
____________
Hope this helps!

____________

Answer:

humans are omnivores they eat plants and animals exept for that vegan teacher

Explanation:

Answer:

The answer is C.2,1,2

Explanation:

The reason why the answer is C.2,1,2 is because if you put a 2 Infront of the first calcium it will be balanced with the calcium in the product side and if you put one in front of the oxygen that wiil be two and it will also be balanced with the oxygen on the product side and seeing that a 2 the coefficient is already on the product side the equation is already balanced

Answer:

C. 2,1,2

Explanation:

Ca(s) + O₂ (g) →2CaO(s)

on the reactants side:

1 Ca

2 O (because the subscript 2 counts as there being 2 O molecules. if you put a 2 in front of the O₂  that would be 2x2=4)

On the product side:

2Ca

2O

you would just need to add a 2 to the Ca on the reactants side to balance the equation.

I hope this helps!

Answer:

Explanation:

Chemical and physical changes occur all around us all the time. These changes are essential parts of our daily lives, for example, digesting food, combustion, osmosis, and phase changes. However, a few of the chemical and physical changes that occur daily are harmful for the environment. This project introduces four physical/chemical changes that are related to the following environmental issues: plastic decomposition, global warming, effects of acid rain, and oil spills.

Answer:

It is used in medical research.

Explanation:

So its answer is trends in drug effectiveness

In the given question, epidemiological studies look into trends in statistics. The correct answer is option D.

Epidemiology is the study of how diseases spread and how to prevent them.

Epidemiologists use statistics to understand how diseases spread and how to prevent them from spreading further. They look at trends in:

Therefore, Option D. "Trends in statistics" is the correct answer.

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Answer:

A beta-particle (plus or minus)

Answer:

See below

Explanation:

1 minute is   4 halflives    ( because  4 x 15 sec = 1 minute)

(1/2)^4 = 1/16

you will have 1/16 as many M&M as you started

The approximate eutectoid temperature of this alloy that has 6.0 wt% Mn is 650°C or 1330°F.

From the information given, the approximate eutectoid temperature of this alloy that has 6.0 wt% Mn is 650°C. This can be converted to Fahrenheit as:

= (650 × 2) + 30

= 1300 + 30

= 1330F

The proeutectoid phase when this alloy is cooled to a temperature just below the eutectoid will be ferrite. It's a ceramic like material with magnetic properties.

The relative amounts of the proeutectoid phase will be:

= (0.62 - 0.20)/062

= 0.68

Similarly, the relative amount of the pearlite will be:

= 0.20/0.62

= 0.32

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Answer:

C

Explanation:

just took the test

Explanation:

Well,

Light travels approximately 1 foot per nanosecond or 186 miles per millisecond or 300,000 kilometers per second.

Hope this helps!

Answer:

Moon rocks contain few volatile substances (e.g. water), which implies extra baking of the lunar surface relative to that of Earth. The relative abundance of oxygen isotopes on Earth and on the Moon are identical, which suggests that the Earth and Moon formed at the same distance from the Sun.

Explanation:

Answer:

They DON"T have the same mass !

Explanation:

Answer:

C

Explanation:

If the enthalpy change (i.e. ΔH) of a reaction is negative, then the reaction releases heat and is hence exothermic.

Hence, our answer is C.

Conversely, if ΔH is positive, the reaction absorbs heat and is endothermic.

ΔH tells us nothing about the speed of the reaction.

While ΔH influences free-energy change (ΔG = ΔH - TΔS), we cannot predict the sign of ΔG given only ΔH (recall that a reaction is spontaneous if ΔG < 0).

THE ANSWER IS OPTION B.

B;SOIL FROM EROSION FILLS UP A POND

HOPE THIS HELP

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Answer:

A liquid does NOT have a definite shape but has a DEFINITE volume.

Explanation:

If you pour water in a shaped glass or container, it takes that shape of the object. But if you pour water on the table, it will run all aver the place.

Answer:

1. Unpredictable

2. All

3. Epicenter

4. Tectonic

5. Seismic

6. Hot

7. Magma

8. Melt

9. High

10. Lava

Explanation:

An earthquake is unpredictable. When an earthquake occurs, the vibrations spread out in all directions from its center. The vibrations are most strongly felt at the epicenter and gradually diminish as they spread out. Earthquakes happen when the tectonic plates rub against each other, which makes the crust of the Earth shake. The energy from the seismic waves is so strong that it makes the crust of the Earth rumble, creating an earthquake. Volcanoes are formed when hot molten rock or magma deep underground oozes up to the surface of the Earth. They are also formed as one of the plates is pushed under the other as it is heated to a point where it begins to melt When high pressure

develops underground, the magma shoots up or erupts through a weak spot in the Earth's crust. When the magma reaches the surface of the Earth, it is called lava.

The temperature of a 1.7379 mole of a gas with a pressure of 1.4948 atm and volume of 92.202 L is 965.69K .

The temperature of a given gas can be calculated using the ideal gas law equation:

PV = nRT

Where;

1.4948 × 92.202 = 1.7379 × 0.0821 × T

137.82 = 0.142T

T = 137.82 ÷ 0.142

T = 965.69K

Therefore, the temperature of a 1.7379 mole of a gas with a pressure of 1.4948 atm and volume of 92.202 L is 965.69K.

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Answer:

1.30

Explanation:

The neutralization reaction involved in the titration is:

HClO₄(aq) + KOH(aq) → KClO₄(aq) + H₂O(l)

According to the chemical equation,

1 mol of HClO₄ reacts with 1 mol of KOH (1 equivalent of acid with 1 equivalent of base). The moles are calculated from the product of the molar concentration (M) and the volume in liters.

We have the following moles of acid (HClO₄):

40.0 mL x 1 L/1000 mL = 0.04 L 0.200 mol/L x 0.04 L = 8 x 10⁻³ moles HClO₄

Since HClO₄ is a strong acid (completely dissociated into H⁺ and ClO₄⁻ ions), the moles of HClO₄ are equal to the moles of H⁺.

Then, we can calculate the initial pH:[H⁺] = 0.200 M → pH = -log [H⁺] = -log (0.200) = 0.70

Now, we calculate the pH after the addition of KOH. Since KOH is a strong base, the concentration of KOH is equal to the concentration of OH⁻ ions.

a) 0.0 mLNo KOH is added, so the pH is the initial pH:

0.70

b) 80.0 mL KOH80.0 mL x 1 L/1000 mL = 0.08 L0.100 mol/L x 0.08 L = 8 x 10⁻³ moles KOH = 8 x 10⁻³ moles OH⁻

After neutralization we have: 8 x 10⁻³ moles H⁺ - 8 x 10⁻³ moles OH⁻ = 0The neutralization reaction is complete and there is no remaining H⁺ from the acid.

The concentration of H⁺ is equal to the concentration of H⁺ of water:

[H⁺] = 1 x 10⁻⁷ M → pH = -log [H⁺] = -log (1 x 10⁻⁷) = 7.0

c) 10.0 mL KOH10.0 mL x 1 L/1000 mL = 0.01 L0.100 mol/L x 0.01 L = 1 x 10⁻³ moles KOH = 1 x 10⁻³ moles OH⁻

After neutralization we have: 8 x 10⁻³ moles H⁺ - 1 x 10⁻³ moles OH⁻ = 7 x 10⁻³ moles H⁺

The total volume is:

V = 40.0 mL + 10.0 mL = 50 mL = 0.05 L[H⁺] = 7 x 10⁻³ moles/0.05 L = 0.14  → pH = -log [H⁺] = -log (0.14) = 0.85

d) 100.0 mL KOH100.0 mL x 1 L/1000 mL = 0.1 L0.100 mol/L x 0.1 L = 0.01 moles KOH = 1 x 10⁻² moles OH⁻

After neutralization we have:

1 x 10⁻² moles OH⁻ - 8 x 10⁻³ moles H⁺ = 2 x 10⁻³ moles OH⁻

The total volume is:

V = 40.0 mL + 100.0 mL = 140 mL = 0.14 L[OH⁻] = 2 x 10⁻³ moles/0.14 L = 0.014  → pOH = -log [OH⁻] = -log (0.014) = 1.84pH + pOH = 14 → pH = 14 - pOH = 14 - 1.84 = 12.15

e) 40.0 mL KOH40.0 mL x 1 L/1000 mL = 0.04 L0.100 mol/L x 0.04 L = 4 x 10⁻³ moles KOH = 4 x 10⁻³ moles OH⁻

After neutralization we have: 8 x 10⁻³ moles H⁺ - 4 x 10⁻³ moles OH⁻ = 4 x 10⁻³ moles H⁺

The total volume is:

V = 40.0 mL + 40.0 mL = 80.0 mL = 0.08 L[OH⁻] = 4 x 10⁻³ moles/0.08 L = 0.05 M  → pH = -log [H⁺] = -log (0.05)

= 1.30

Answer:

c

Explanation:

The current level of health, goals, and diet need to be taken into consideration while planning an exercise program.

Exercise programs should include some specific exercises to improve cardiovascular health, such as swimming, jogging, rowing, elliptical exercises, and biking.

To assess your current fitness level use or make an appointment with an exercise professional for a fitness assessment. Consulting an exercise professional when designing a fitness program can help you reduce injury and customize a program to your needs. The adult pre-exercise screening tool consists of exercise guidelines.

Consider your goals and think about likes and dislikes. Plan a logical progression of activity and build activity into a daily routine. If you begin to lose motivation then set new goals or try a new physical activity.

Give time for recovery after exercising and make sure to have an adequate healthy diet and assemble exercise clothing.

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Answer:

ionic bonding

Explanation:

it's ionic bonding while covalent bonding involves sharing

The accurate systematic name of the coordination compound is diaminodicyano platinum II.

A coordination compound is which contains a central metal atom or ion along with ligands in its coordination sphere. Some times, counterions may alaso be present to balance the charges.

The accurate systematic name of the coordination compound is diaminodicyano platinum II.

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Answer: 30.0 L S02

Explanation: It was right on mine