how many formula units are there in 216g of Ba(NO3)2?

Answer:

8. The particles have the same volume in each container (not so sure about number 8 )  9. Solid  10. Gas 11. Temperature and Pressure

Answer:

my sources say that there is a lot of empty space between then

Explanation:

their forces to attract each other is not strong

kinetic energy is always high in gasses

Answer:

Excluding hydrogen in group 1, metals

Explanation:

All the elements from group 1 to 12, excluding hydrogen at the top of group 1 are all metals

Answer:

Eutrophication is the enrichment of a body of water with excessive nutrients (nitrogen and phosphorus), which causes algal growth and subsequent decline of dissolved oxygen after decomposition.

Answer:

Initial temperature, T1 = 15°C

Explanation:

Given the following data;

Initial volume, V1 = 250 mL to Liters = 250/1000 = 0.25 L

Final temperature, T2 = 30°C

Final volume, V2 = 0.5 L

To find the initial temperature T1, we would use Charles' law.

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles is given by;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]

Making T1 the subject of formula, we have;

[tex] T_{1}= \frac{V_{1}}{V_{2}} * T_{2}[/tex]

Substituting into the formula, we have;

[tex] T_{1}= \frac{0.25}{0.5} * 30[/tex]

[tex] T_{1}= 0.5 * 30 [/tex]

Initial temperature, T1 = 15°C

Answer:

amylase

Explanation:

Answer:

red

Explanation:

red shows if solution is acidic

Answer:

I believe it may be-

1. Series

2. Parallel

3. Parallel

4. Series

Explanation:

In a series circuit, electricity only has one path to follow while a parallel circuit has more than one path to follow.

Answer: Hewo, there! your answer is Below

C. Sweating Would be the correct answer,

Explanation:

it sends signals to your sweat glands to make you sweat and cool you off. When the hypothalamus senses that you're too cold, it sends signals to your muscles that make your shiver and create warmth. This is called maintaining homeostasis.

Hope this helps you!!

Have a great day!!

Answer:

Which of the following body responses help maintain homeostasis by decreasing body temperature is? I want to say Sweating

Explanation:

But read this before answering to make sure. See what you think. This is what I found

Answer:

Because phytoplankton are near the bottom of the food chain, it would cause a domino affect where all of the higher levels are impacted. We could expect to see a decreased amount of organisms that eat the plankton and an increased competition for food.

Explanation:

Answer:

Phytoplankton converts energy from the Sun into usable energy that fuels the rest of the food web. So, the higher levels of the food web won’t be able to sustain themselves if the population of phytoplankton decreases.

Answer:

chivalry and the romance of nomadic life. the life of Muhammad. a strict adherence to religious themes.

Explanation:

Sorry if its wrong

Answer:

a) pH = 13.447

b) pH = 13.176

Explanation:

Ba (OH)₂ is a strong base and ionizes completely in solution to give barium amend hydroxide ions.

The equation of the dissociation of Ba(OH)₂ is given below:

Ba(OH)₂ ----> Ba2+ + 2OH-

1 mole of Ba(OH)₂ produces 2 Moles of OH- ions

a) Before the addition of HCl, i.e.,when 0.00 mL of HCl has been added;

Concentration of hydroxide ions, [OH-] = 0.140 x 2 = 0.a) [OH-] = 0.100 x 2 = 0.280

pOH = -log [OH-]

pOH = -log (0.280)

pOH = 0.553

pH = 14 - 0.553= 13.447

b) pH when 15.0 mL HCl has been added

Moles Ba(OH)₂ = concentration × volume

Volume of Ba(OH)₂ = 82.0 mL = 0.082 L, concentration = 0.140 M

moles of Ba(OH)₂ = 0.082 x 0.140 = 0.01148 moles

moles OH- produced by 0.01148 moles of Ba(OH)₂ = 2 x 0.01148= 0.02296

moles HCl = 0.0150 L x 0.560 = 0.0084

moles of H+ produced by 0.0084 HCl = 0.0084

0.0084 H+ willnreact with 0.0084 moles of OH-

moles OH- left after the reaction = 0.02296 - 0.0084 = 0.01456 moles

total volume of new solution = (82 +15) mL = 97 mL => 0.097 L

Concentration of OH- ions = moles / volume

[OH-] = 0.01456 / 0.097 = 0.1501

pOH = -log [OH-]

pOH = -log (0.150)

pOH = 0.824

pH = 14 - 0.824

pH = 13.176

Answer:

Hydrogen Gas

Explanation:

The hydrogen gas now in the test tube is flammable. So when I hold the tube over the flame, the hydrogen gas ignites and creates a popping sound. It is like a tiny bomb or fireworks.

Hope this helped! :)

Answer: B) 10 ml

Explanation:

According to the dilution law,

[tex]M_1V_1=M_2V_2[/tex]

where,  

[tex]M_1[/tex] = molarity of  stock [tex]NaOH[/tex] solution = 1.0 M

[tex]V_1[/tex] = volume of stock [tex]NaOH[/tex] solution = 2.0 ml  

[tex]M_1[/tex] = molarity of dilute [tex]NaOH[/tex]  solution = 0.20 M

[tex]V_1[/tex] = volume of diluted [tex]NaOH[/tex] solution = ?

Putting in the values we get:

[tex]1.0\times 2.0=0.20\times V_2[/tex]

[tex]V_2=10ml[/tex]

Therefore, final volume reading is 10 ml

Answer:

The range of values of some property

Explanation:

A.pex, and the comments on the other answer

The best defines a spectrum is The range of values of some.

A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism. As scientific understanding of light advanced, it came to apply to the entire electromagnetic spectrum. It thereby became a mapping of a range of magnitudes (wavelengths) to a range of qualities, which are the perceived "colors of the rainbow" and other properties which correspond to wavelengths that lie outside of the visible light spectrum.

Spectrum has since been applied by analogy to topics outside optics. Thus, one might talk about the "spectrum of political opinion", or the "spectrum of activity" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. Nonscientific uses of the term spectrum are sometimes misleading. For instance, a single left–right spectrum of political opinion does not capture the full range of people's political beliefs. Political scientists use a variety of biaxial and multiaxial systems to more accurately characterize political opinion.

Learn more about spectrum

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Answer:

1.5×10^4

Explanation:

Pressure= force/area

P= 600/0.04

P= 15000

P= 1.5×10^4

What are the answers? I assume you meant to attach a photo.

Answer:

Thus, the one that is an example of mimicry that enables prey species to avoid predation is a harmless organism imitating the look of a harmful one (option B).

Explanation:

Answer:

Big False

Explanation:

As the magnets get closer, the stronger the magnetic field. The farther away, the less strength the field exhibits.

Answer:

you siad i can answer with anything :)

Answer:66

Explanation:

5.5 feet is 66 inches

Answer:

66 inches

Explanation:

(12 in = 1 ft)

5.5 ft x 12 inches = 66 inches

Answer:

magnesium+ hydrochloric acid is the reactants

Explanation:

the reactants are always in the left and the products are always in the right by

magnesium+hydrochloric acid ⇒ magnesium chloride + hydrogen

by combining magnesium and hydrochloric acid it produces magnesium chloride and hydrogen.

hope this helps..

Answer:

E

Explanation:

E

Erosion often change the shape of the land. Just as water and wind pass across land, they often carry away grains of soil and wear down rock. Years of this continuous process therefore reduces the size of the cliff, hills and mountains. It often cuts through the ground to form valleys, canyons and ditches.

Water erosion result in loss of topsoil, reduced crop yields, damaged infrastructure, weed dispersal etc.

Learn more from

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Answer: The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.

Explanation:

Atomic number is equal to the number of protons or number of electrons for a neutral species and is specific to a particular element.

Mass number is the sum of number of protons and the number of neutrons.

Here the atomic number of Argon is 18 , thus the number of protons is 18 and thus the number of electrons is also 18.

The given mass number is 40. Thus number of neutrons = (40 - 18) = 22.

The number of neutron electron and proton in the nuclide [tex]_{18}^{40}\textrm {Ar}[/tex] is 22, 18 and 18.

Answer:

6

Explanation:

Balancing a chemical equation involves making sure that the number of atoms of each element on the reactant side is equal to that on the product side. For example, if there are 5 moles of carbon on the reactant side, there must be 5 moles of carbon on the product side. This is in accordance to the law of conservation of mass.

However, to do the above, we make use of coefficients i.e whole numbers placed behind the elements. According to this question, an unbalanced chemical reaction is given as follows:

Fe(OH)3 + Li2S → LiOH + Fe2S3

As observed, the number of atoms on each side of the reaction are unequal. Hence, coefficients are used to balance the equation as follows:

2Fe(OH)3 + 3Li2S → 6LiOH + Fe2S3

From the balanced equation, 6 is used as a coefficient in front of LiOH.

Answer:

C12h22o11 moles to grams

1 mole is equal to 1 moles C12H22O11, or 342.29648 grams.

hope this helps

Explanation:

Answer:

Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.

Explanation:

Answer:

Difference between hydroxyl group of alcohol and hydroxyl group of alkalis is as following: Hydroxyl group of alcohol is composed of carbon, oxygen and hydrogen atoms while hydroxyl group of alkalis composed of one alkali group, hydrogen and oxygen atom.