What is the pH of a 0.00750 M solution of hydrochloric acid, HCl? (2 points) pH = 1.45 pH = 1.93 pH = 2.12 pH = 3.07

Explanation:

FALSE

ITS NOT ALWAYS NECESSARY TO BE IN AN ORDER

Answer:

C. Scientists may study and discuss organisms easily

The actual answer is size and temperature

All stars are very hot. They resemble a gigantic furnace of atomic energy. Some stars are much hotter than others and appear to be brighter. The brightness of a star also depends upon its size and its distance from the Earth. Larger stars tend to be brighter, but a star closer to the Earth will appear brighter than one the same size that is farther away.

PLEASE GIVE ME BRAINLIEST

Answer:

the correct answer is Size, Temperature, distance from the earth

hope this helps!! <33

132 pounds.  As you stated, their weight is 60 kg and 60 kg = 132.77 pounds

Answer:

Explanation:

At constant pressure and temperature, the mole ratio of the gases is equal to their volume ratio (a consequence of Avogadro's law).

Hence, the complete combustion reaction that has a ratio of 100 ml of gaseous hydrocarbon to 300 ml of oxygen, is that whose mole ratio is 1 mol hydrocarbon : 3 mol of oxygen.

Then, you must write the balanced chemical equations for the complete combustion of the four hydrocarbons in the list of choices, and conclude which has such mole ratio (1 mol hydrocarbon : 3 mol oxygen).

A complete combustion reaction of a hydrocarbon is the reaction with oxygen that produces CO₂ and H₂O, along with the release of heat and light.

a. C₂H₄:

Precisely, for this reaction the mole ratio is 1 mol C₂H₄: 2 mol O₂, hence, this is the right choice.

The following analysis just shows that the other options are not right.

b. C₂H₂:

The mole ratio for this reaction is 2 mol C₂H₂ :5 mol O₂.

с. С₃Н₈

The mole ratio is 1 mol C₃H₈ : 5 mol O₂

d. C₂H₆

The mole ratio is 2 mol C₂H₆ : 7 mol O₂

Answer:

The reaction will move to the left.

Explanation:

Ba(OH)₂ = Ba²⁺ + 2OH⁻,

Ba(OH)₂ is dissociated to Ba²⁺ and 2OH⁻.

H⁺ will combine with OH⁻ to form water.

So, the concentration of OH⁻ will decrease and the equilibrium is disturbed.

According to Le Châtelier's principle: when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

The base will dissociate to form more OH⁻ and thus, the quantity of Ba(OH)₂ will decrease.

So, the right choice is: the reaction will move to the left, is the choice that will not happen to the equilibrium.

Final answer:

Adding H+ ions to a solution of Ba(OH)₂ shifts the equilibrium to the left, reducing the dissociation of Ba(OH)₂ and forming water by combining H₊ and OH₋ ions. The increase in H₊ leads to an increase in Ba(OH)₂ concentration as OH₋ ions are consumed.

Explanation:

When an acid is added to a solution of Ba(OH)₂, which is barium hydroxide, equilibrium dynamics according to Le Chatelier's principle tell us that the H₊ ions will react with OH₋ ions to form water. This reaction will cause the equilibrium of the solution to shift. Specifically, the ionization of Ba(OH)₂ which is represented by the reaction Ba(OH)₂ ⇒ Ba₂₊ + 2OH₋, will move towards the left to decrease the concentration of OH₋ ions that combine with incoming H₊ ions.

The reaction that will not happen is the dissociation of more Ba(OH)₂ to form additional OH₋ ions, because of the presence of excess H₊ ions that drive the equilibrium leftwards. The quantity of Ba(OH)₂ will increase at the expense of OH₋ ions, as they are consumed to form water.

Answer:

- 618.8 J.

Explanation:

Q = m.c.ΔT,

where, Q is the amount of heat released by steam (Q = ??? J).

m is the mass of the steam (m = 15.5 g).

c is the specific heat of the steam (c of steam = 1.996 J/g.°C).

ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 100.0°C - 120.0°C = - 20.0°C).

∴ Q = m.c.ΔT = (15.5 g)(1.996 J/g.°C)(- 20.0°C) = - 618.8 J.

About 45.6 gAL are need to completely react with 135g FE2O3

To determine the mass of Al needed to react with 135 grams of Fe₂O₃, convert the mass of Fe₂O₃ to moles, use the stoichiometric ratio to find moles of Al needed, and then convert those moles to grams of Al to three significant figures.

The question is asking how many grams of aluminum (Al) are needed to completely react with 135 grams of iron(III) oxide (Fe2O3). This is a stoichiometry problem that requires using the balanced chemical equation:

Fe₂O₃(s) + 2Al(s) →2Fe(s) + Al₂O₃(s)

We start by converting the mass of Fe₂O₃ to moles using its molar mass:

1.0g Fe₂O₃ / 159.7 g/mol = moles of Fe₂O₃

Then we use the mole ratio from the balanced equation to convert from moles of Fe₂O₃ to moles of Al. The molar mass of Al is 27.0 g/mol. Finally, we convert moles of Al to grams using its molar mass to find the mass of Al needed for the reaction.

With the provided mass of 135g of Fe₂O₃, and the reaction stoichiometry, we can determine the mass of Al required which will be expressed to three significant figures.

Answer:

Alpha has the greatest mass- A.

Answer: The correct answer is Option A.

Explanation:

For the given options:

Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a mass of 4 units.

[tex]_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha[/tex]

Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron. The beta particle does not have any mass.

[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta[/tex]

Gamma decay is defined as the process in which an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and thus releases [tex]\gamma -radiations[/tex]. These radiations does not have any mass.

[tex]_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma[/tex]

Nuclear reactions are defined as the reactions in which change of nucleus takes place.

Hence, the correct answer is Option A.

Answer:

The molar mass of copper (II) nitrate is 187.5 g/mol.

Explanation:

The molar mass is the mass of all the atoms in a molecule in grams per mole. To calculate the molar mass of a molecule, we first obtain the atomic weights from the individual elements in a periodic table. We then count the number of atoms and multiply it by the individual atomic masses.

Answer:-

Try this formula:

W= Fd

F = W by d

Explanation:-

(Note: A newton-meter is the same thing as a joule, so the units for work are the same as those for energy – joules).

The force required to lift a rock at a vertical distance of 8 m if 80 j of work were done is 10 N.

A force is an effect that can alter an object's motion. Due to force, an object with mass can change its velocity, or accelerate.

Given,

Distance is 8 m

work done is 80 j

Now by the formula of work

[tex]\bold{Work = force \times distance}[/tex]

[tex]80= F\times 8\\\\F= \dfrac{80}{8} = 10 N[/tex]

Thus, the force required is 10 N.

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Answer:

Explanation:

In a solubility table you find:

In a chemical equation the states of soluble compounds is identified as aqeous, using the letter "aq" in parenthesis, and the state of insoluble compounds is identified as solid, using "s" in parenthesis.

Then, the reaction showing the states of the reactants and products is:

In the chemical reaction AgNO3 + KCl = AgCl + KNO3, the state symbols for each compound are provided - AgNO3 (aq), KCl (aq), AgCl (s), and KNO3 (aq).

The state symbols for each compound in the reaction AgNO3 + KCl = AgCl + KNO3 are:

Answer: It would be paint.

Explanation: it would be paint because it doesn't come completely together. another example of a heterogeneous mixture could be cereal and milk.

Answer: By pushing it.

Explanation: If you push the pendulum, the energy from your hand to the pendulum will be transferred thus giving the pendulum more energy.

Hello There!

The moloques are moving faster in warm soda, so the carbonation leaves the soda faster.

Answer:

Same as what BlueFox stated above EXCEPT it is gas molecules move faster in warm soda

Explanation:

making fun of his typo,,,

Answer:

the axis is tilted at 98 degrees

Explanation:

Uranus is blue, not green; it has an atmosphere of hydrogen and helium, not methane.  While it does have an icy cold temperature, that's not a very unusual characteristic for an outer planet.  However, the tilt of the axis is unusual; no other planet is tilted almost completely on its side!

I believe it would be either the Density or the composition of its matter

It is the composition of matter

Out of the three you gave ecosystem is what I would call the most broad. An ecosystem includes living AND non-living things in an area

Community is all the LIVING things in an area (plants are included and I think bacteria is too, but I'm not sure)

Population is pretty narrow it just looks at specific species in one area. Population of mosquitoes doesn't include butterflies, if only looks at mosquitoes

Hope this helped!

Answer:

V₂ = 0.483L = 483mL

Explanation:

Given parameters:

Inital volume of air in shampoo bottle V₁ = 553mL

Original temperature of the bottle T₁ = 65°C

Final temperature T₂= 22°C

Final volume of the gas in the bottle V₂=?

We first take the given units into standard units:

K = T°C + 273

For T₁ we have the temperature to be = 65 + 273 = 338K

                 T₂ = 22 + 273 = 295K

For the volume we convert to Litres or dm³

              1000mL = 1L

V₁ = 553 x 10⁻³L = 0.553L

Now apply one of the gas laws to solve this problem.

From Charles law, we know that the volume of fixed mass of gas is directly proportional to its absolute temperature if the pressure is constant.

Charles's law is expressed as:

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

The unkown in the equation is V₂ we the express it as the subject of the formula :

                    V₂ = [tex]\frac{V_{1} T_{2} }{T_{1} }[/tex]

Putting the parameters in the equation gives:

                   V₂ = [tex]\frac{0.553 x 295}{338}[/tex]

                  V₂ = 0.483L = 483mL

Final answer:

To find the grams of phosphorus in 500.0 grams of calcium phosphide, the molar mass of calcium phosphide is calculated, followed by the number of moles in the sample. The mole ratio then gives the moles of phosphorus, which is finally converted to grams, resulting in approximately 169.35 grams of phosphorus.

Explanation:

To determine the number of grams of phosphorus in 500.0 grams of calcium phosphide, we need to follow these steps:

Therefore, there are approximately 169.35 grams of phosphorus in 500.0 grams of calcium phosphide.

Acetone may be rinsed over materials to wash off explosive residue.

The real solution to the residue issue is to use methods that actually rinse away cleaner.

Some solvents and steam vapor systems are examples of residue-free chemistry. Completely water soluble and rinseable, soap-free products for carpet and hard floor care are a valuable part of the professional cleaner’s arsenal of residue-free cleaners.

In clean areas, all exposed surfaces should be smooth, impervious and unbroken in order to minimize the shedding or accumulation of particles or microorganisms and to permit the repeated application of cleaning agents, and disinfectants where used.

Acetone may be rinsed over materials to wash off the explosive residue. This can then be analyzed by x-ray techniques. Advance in explosives that has been proposed. Use of small color chips. These chips would be added to explosive materials available to the public.

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Answer:

Sulfonic acid

Explanation:

I think this is correct

The name of the chemical formula [tex]S_4O_6[/tex] is tetrathionate.

The tetrathionate anion is sulfur that is produced by tetrathionic acid.

The ion has two sulfur atoms in oxidation state 0 and two sulfur atoms in oxidation state +5.

The structure of tetrathionate can be seen by following three corners of a cube.

Thus, Tetrathionate is the name of [tex]S_4O_6[/tex].

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Answer:

Gravity

Everything with mass has gravity

Answer:

to make it more simple its A and D

Explanation:

edge

Arrhenius bases are the species that release hydroxide ions in the solution. Barium hydroxide and Caesium hydroxide are examples of Arrhenius bases.

Arrhenius bases are the chemical compounds that increase the concentration of the hydroxide ion in a solution when gets ionized. Whereas the acids release hydrogen ions when dissolved in water.

Barium hydroxide and Caesium hydroxide are the chemical species when dissolved in water will completely dissociate to release hydroxide ions and are the strong bases.

Therefore, option A. barium hydroxide and option D. cesium hydroxide are Arrhenius bases.

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An aerosol is a colloidal suspension in a gas, consisting of small particles or droplets that do not settle due to their small size. Examples include fog and smoke, where the dispersing medium is air. Understanding aerosols is important for their role in atmospheric processes and distinguishing them from other mixtures like solutions and suspensions.

An aerosol is a colloidal suspension in a gas. This means that an aerosol comprises tiny particles or droplets that are suspended within a gas. Unlike a suspension, where the particles can separate out over time due to their size (generally larger than 1 µm), the particles in a colloidal system, like an aerosol, do not settle because they are much smaller and range in size from about 2 to 500 nm. Aerosols can be composed of both solid and liquid particles dispersed in a gas, and these particles are stable enough not to settle quickly under the influence of gravity.

Examples of aerosols include fog, which consists of liquid water droplets dispersed in air, and smoke, which contains solid carbon particles also suspended in air. In both cases, the medium dispersing these particles is a gas (air), highlighting the defining characteristic of aerosols as a type of colloid. The significance of aerosols extends beyond simple examples, as they play integral roles in atmospheric processes, affecting weather, climate, and air quality, by influencing the scattering and absorption of radiation and serving as nuclei for cloud formation.

The ability of colloids, including aerosols, to scatter light, known as the Tyndall effect, further distinguishes them from solutions which are homogeneous mixtures and therefore do not exhibit this phenomenon. It's important to understand the distinction between aerosols and other types of mixtures, such as solutions and suspensions, to appreciate the unique physical and chemical behaviors of colloidal systems.

Atoms that have different numbers of neutrons than protons and electrons are called isotopes.

Isotopes are atoms of the same element so they have the same number of protons. But, they have different mass numbers which means they have a different number of neutrons.

A thermodynamic quantity equivalent to the total heat content of a system

Answer:

a thermodynamic quantity to the total heat content of a system. it is equal to the internal energy of the system plus the product of pressure and volume. it is associated with a particular chemical process

Explanation:

i just looked up the definition.

Answer:

The ratio between protons to electrons is not 1:1

Explanation:

A normal atom will be neutral in charge having 1 electron for each atom. An Atom that gains or looses an electron loses that perfect ratio. It is positive is electrons are loss and negative if electrons are gained.

the element first discovered in the sun is the element Helium. This noble gas is the second most abundant element in the universe and was discovered on the sun before it was discovered on the earth.

hope this helps :)