What are the two main systems we use for describing acids and bases?

Answer:c. Hooke and Leeuwenhoek

Explanation: I ask and that answer was right I don't know the explanation

Answer:

C. hooke and leruwenhoek

Answer:

3.0 L

Explanation:

V1/V2 = T1/T2

4.3L / V2 = 359K/250K

V2 = (4.3*250)/359 ≈ 3.0 L

The amount of energy transferred between the metal and the water is 500 cal.

The amount of energy transferred between the metal and the water can be calculated using the formula:

Energy = Mass of water × Specific heat of water × Change in temperature

Given that the initial temperature of the water was 25 °C and the final temperature was 35 °C, and the mass of the water was 50 g, we can substitute these values into the formula:

Energy = 50 g × 1 cal/g °C × (35 °C - 25 °C)

= 500 cal

Therefore, 500 cal of energy was transferred between the metal and the water.

Answer: 1.11 atm

Explanation:

The unit of pressure include kilopascal (kPa), atmospheres (atm), mmHg etc

Now, given that:

Air pressure = 113 KPa

Convert kPa to atm

If 101.325 kPa = 1 atm

113 kPa = Z atm

To get the value of Z, cross multiply

Z atm x 101.325 kPa = 1 atm x 113 kPa

Z = ( 1 atm x 113 kPa) / 101.325 kPa

Z = 1.11 atm

Thus, the pressure is 1.11 atm

Answer:

Upper B a superscript 2 plus, plus 2 upper N upper O subscript 3 superscript minus right arrow upper B a (upper N upper O subscript 3) subscript 2.

I think...

Answer: Upper N upper H subscript 4 superscript plus. and Upper S upper O subscript 4 superscript 2 minus.

Explanation: The spectator ions in this reaction are the ammonium ion and the sulfate ions.

In a reaction, not all of the ions are reacting. The ions not reacting are called the spectator ions.

When we eliminate such ions, we get an overall view of the reaction.

The reaction is:

     2NH₄⁺  + 2OH⁻ + 2H⁺ + SO₄²⁻ ⇒ 2NH₄⁺  + 2H₂O + SO₄²⁻

In ionic equations, water soluble reactants and products are split into their constituent ions while non-ionizing or gaseous reactants and products are represented as formulae or molecules.

 The species that are not reacting and appears on both sides are  2NH₄⁺ and SO₄²⁻ and are the spectator ions.

These non-reactive species are eliminated from the overall ionic equation that shows the reacting ions only.

Food acids are added to make flavors "sharper", and also act as preservatives and antioxidants.

Acids are added to foods in order to preserving food as well as a food additives.

Acids are added for preserving food products as well as preventing bacteria growth and maintain quality of a product. there are a number of fruits and vegetables that have different types of acid.

So we can conclude that acids are added to foods in order to preserving food as well as a food additives.

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Answer:

Explanation:

You need the specif heat capacities of both cobalt and lead.

When the two sheets reach the thermal equilibrium their temperatures are equal.

You can use the equations for the thermal heat to find the equilibrium temperature:

Thermal heat released by the hot sheet, lead:

Thermal heat absorbed by the cold sheet, cobalt:

Equal the two equations to solve for T:

I remove the units for easier handling:

Round to 2 significant figures: 35ºC ← answer

Answer:

The pressure will be 1, 83 atm

Explanation:

We use Boyle Mariotte's formula: for a given mass of gas at constant temperature, the pressure and volume vary inversely proportionally. We convert the unit ml into L: 111/1000= 0,111 L and 85/1000= 0,085 L.

P1xV1=P2xV2

P2= (P1xV1)/V2=(1,4 atm x 0,111L)/0,085L=1,83 atm

Answer:

The correct term for the definition is Allele.

Answer:

27.03 g/mol

Explanation:

Molar Mass of HCN

Mass of Hydrogen : 1.008

Mass of Carbon: 12.01

Mass of Nitrogen: 14.01

Molar Mass of HCN =

1.008 + 12.01 + 14.01=

27.03 g/mol

Answer:

B. H2

Hydrogen gas is the oxidized (reducing agent).

In the reaction N₂O + H₂ -> H₂O + NH₃, oxidation and reduction involve changes in oxidation states. Nitrogen in N₂O is ostensibly the species that gets oxidized. therefore the correct option is e.

To determine which species is oxidized in the reaction N₂O + H₂ -> H₂O + NH₃, we need to look at the changes in oxidation states of the elements involved. Oxidation involves an increase in oxidation state. In this reaction, nitrogen (N) goes from a lower oxidation state in N₂O to a higher one in NH₃, implying that hydrogen (H₂) is gaining electrons and being reduced, meaning the oxidized species must be N₂O. However, the options provided do not correctly match the elements or compounds in the reaction as written. The question might contain a typographical error since none of the options correctly identify nitrogen in the form of N₂O or NH₃. Typically, the oxidation state of hydrogen (H) is +1, and for nitrogen in NH₃, it's -3. Based on standard oxidation states, the closest correct answer, despite the mislabeled choices, would be nitrogen in some form because it's nitrogen's oxidation state that is changing in this context, not hydrogen's in a way that would indicate it's being oxidized. Without the correct options provided, addressing this question accurately is challenging.

The complete question is

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Which species is oxidized in the following reaction? N₂O + H₂ -> H₂O + NH₃

A) N+

B) H2

C) H+

D) N3

E) None of the above.

Answer:

Released

Explanation:

When particles that attract each other come together, energy is usually released. The combination of the two particles is expected to result in a lower energy system. This lower energy system will be more stable than the different individual particles.

Hence, as this lower energy system is formed, the excess energy originally possessed by the particles is evolved hence energy is released when particles that attract each other are allowed to come together.

Answer:

8.45 moles are produced

Explanation:

CaCl₂ + Na₂CO₃ → CaCO₃ + 2 NaCl

From the equation, we can see that for every 1 mole of CaCl₂  and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl

to calculate how many moles of CaCO₃ ,we simply multiply multiply each by the 8.45 moles of CaCl₂ which will reacts

these is because for every 1 mole of CaCl₂  and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl

therefore we have every 1x8.45(8.45)  mole of CaCl₂  and 1x8.45(8.45) mole Na₂CO₃ will give 1x8.45(8.45) mole of CaCO₃ and 2x8.45(16.9) moles of NaCl

8.45 moles are produced in the reaction

Answer:

8.45 moles

Explanation:

The balanced equation for the reaction is given below:

CaCl2 + Na2CO3 → CaCO3 + 2NaCl

From the balanced equation above,

1 mole of calcium chloride (CaCl2) produced 1 mole of calcium carbonate (CaCO3).

Therefore, 8.45 moles of calcium chloride (CaCl2) will also produce 8.45 moles of calcium carbonate (CaCO3)

From the illustration above, 8.45 moles of calcium carbonate (CaCO3) are produced.

Answer:

Assuming the reaction you are referring to is the following:

AgNO3 + Cu --> Cu(NO3)2 + Ag

First, we should balance the reaction:

2 AgNO3 + Cu --> Cu(NO3)2 + 2 Ag

Now we carry out dimensional analysis, taking into account the molar ratios of different species as given in the balanced reaction and molar masses (which we can look up in the periodic table).

We begin with what we know, which is that we have 16.0 g Cu reacting and work our way toward the quantity that we would like to calculate, namely moles of Ag.

16.0 g Cu x   1 mol Cu    x   2 mol Ag    = 0.504 mol Ag

                     63.5 g Cu       1 mol Cu

Answer:

-3

Explanation:

Answer:

An internal force acts between elements of the system. ... Only external forces affect the motion of a system, according to Newton's first ... Newton's second law states that a net force on an object is responsible for its ... Prior to manned space flights, rocket sleds were used to test aircraft, missile equipment, and physiological

Explanation:

Answer:

C. The amount of solute that will dissolve in a given amount of solvent.

Explanation:

Solubility is the amount of solute that will dissolve in a given amount of solvent. Option 3 is correct.

A solution is a homogeneous mixture of two or more substances, where the substances are uniformly distributed throughout the mixture.

Therefore, the amount of solute that will dissolve in a given amount of solvent is referred to as solubility. The correct answer is option 3.

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Complete Question:

Which statements describe the inner planets? Select three options.

A.  Uranus is one of the inner planets.

B. Mercury is one of the inner planets.

C. The inner planets are also called terrestrial planets.

D. The inner planets are larger than the outer planets.

E. Gases escaped from them during the planets’ formation.

Correct Option:

The statements which describe the inner planets are as follows:

B. Mercury is one of the inner planets.

C. The inner planets are also called terrestrial planets.

D. Gases escaped from them during the planets’ formation.

Explanation:

We have the smallest planet in the inner solar system - Mercury, Venus, Earth and Mars, which are so identified for being near to the Sun. A terrestrial planet, a telluric planet, or a rocky planet is a world made up predominantly of rocks of silicate or metal. The outer planets in the solar system are the nearest inner planets to the Earth.

The planets inside are smaller than the outer planets. When the fusion began on the Sun a huge seismic eruption would have originated from the Sun's core and erupted externally. It produced a concussion wave that washed away the inner planets' thick gaseous atmospheres, just like a candle flame bursts out of its wick when you unexpectedly blow.

Answer:

80.043 g/mol

Explanation:

Ammonium nitrate is a chemical compound, the nitrate salt of the ammonium cation. It has the chemical formula NH ₄NO ₃, simplified to N₂H₄O₃. It is a white crystalline solid and is highly soluble in water. It is predominantly used in agriculture as a high-nitrogen fertilizer.

Answer:

6gm/cm³

Explanation:

It's simple,

The formula to Density is as follows,

Mass

Density = --------

Volume

Grams is a measurement of Mass and Cubic center meters is a measurement of Volume. Thats why we will fill in the formula like this,

54

D = -------

9

Then we divide to get,

D = 6

Next we fill in the units which are grams and cubic centimeters. The initials for the 2 are gm and cm³ so we'll combine those into this,

gm/cm³

Next we combine our answers which also brings us to our answer- 6 gm/cm³

Hope I was helpful,

Toodles

John Dalton provided the basic theory about the nature of matter, which came to be known as Dalton's atomic theory.

According to Dalton's atomic theory, all matter is composed of small particles called atoms.

Dalton provided some postulates of this theory. Some of the important ones are:

So, as we see in the postulates, Dalton's atomic theory provided an explanation for the law of conservation of mass and the law of definite proportions.

The postulate of Dalton's atomic theory, i.e., "Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction." is the result of the law of conservation of mass.

The postulate "The relative number and kinds of atoms are constant in a given compound." can explain the law of definite proportion.

However, later it was found that there are some drawbacks of Dalton's atomic theory.

Hope you could understand.

If you have any query, feel free to ask.

Answer:

B. liquid to gas

Explanation:

Matter exists in 3 different states:

- Solid: in solids, particles in the substance are tightly bond to each other through strong intermolecular forces. Therefore, they can only vibrate around their fixed position, but they cannot move freely: as a result, the distance between the particles is the smallest among the 3 states of matter.

- Liquid: in a liquid, particles are able to slide past each other, however there are still intermolecular forces keeping them not too far from each other. As a result, in liquids, particles are on average more distance from each other compared to solids.

- Gas: in a gas, particles are completely free to move, as the intermolecular forces between them are negligible. As a result, in gases, the distance between molecules is the greatest, compared with solids and liquids.

Therefore, the phase changes in which the average distance between molecules increases is:

B. liquid to gas

Answer:

1.atomic number

2.electron

3.element

4.atom

5.neutron

6.nucleus

7.proton

Explanation:

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The matching exercise pairs terms like 'atomic number' and 'electron' with their correct definitions. The sum of protons and neutrons in an atom's nucleus is the 'mass number,' and the space where electrons are most likely to be found around the nucleus is known as an 'electron shell.'

Now, to address the descriptions provided

(a) The sum of the number of protons and neutrons in an atom is known as the mass number.

(b) The defined space around an atom's nucleus, where an electron is most likely to be found, is called an electron shell or energy level.

Answer:

single replacement reaction.

Answer:

1) 3-methylpentane   2)Butyne

Explanation:

On the first molecule, we have a methyl group on the 3rd carbon, so you will have "3-methhyl". It's a 5 carbon molecule with no double bonds, so "-pentane" is required.

On the second molecule, we have a simple 4 carbon molecule with a triple bond which makes it an Alkyne. 4 carbons makes the prefix "but-" and a alkyne males the ending "-yne".

Answer:

9.38mmHg

Explanation:

V₁ = 5m³

P₁ = 7.5mmHg

V₂ = 4.0m³

P₂ = ?

Applying Boyle's law,

The volume of a fixed mass of of gas is inversely proportional to its pressure as long as temperature is kept constant.

P = k / V

P₁ * V₁ = P₂ * V₂

v₂ = (p₁ * v₁) / v₂

V₂ = (5.0 * 7.5) / 4.0

v₂ = 9.375 ≈ 9.38mmHg

The new volume of the gas is 9.38mmHg

Explanation:

Human activities commonly affect the distribution, quantity, and chemical quality of water resources. The range in human activities that affect the interaction of ground water and surfa.ce water

The effects of human activity on groundwater and surface water in a watershe, Watersheds directly affect water quality, whether it's for drinking or recreation. For example, algae blooms from fertilizer runoff draining into water harm watershed health, as do mercury and lead seeping into the water supply due to pollution. ... The polluted water supply that results can become harmful to humans.

a result, most water becomes polluted by human activities. These include: throwing sewage and industrial waste into rivers and oceans, using harmful fertilizers, and even littering. All of these human activities affect our water sources. ... Water pollution affects the plants, animals, and soil around the river.

Human activities such as industrial waste discharge, use of pesticides and fertilizers, urban development, and excessive groundwater extraction have significant impacts on groundwater and surface water in watersheds. These activities result in water pollution, flooding, erosion, land subsidence, and reduced water supply.

Human activities significantly impact both groundwater and surface water within a watershed. For example, industrial processes, agricultural practices, and urban development can all lead to the pollution of water sources. Industries often discharge waste into water bodies, which increases the chemical concentration affecting both groundwater and surface water. Additionally, the use of fertilizers and pesticides in agriculture seeps into the ground and contaminates groundwater, which eventually affects surface water as well.

Urban development affects watersheds by increasing impervious surfaces like pavement, reducing the land's ability to absorb water into the ground. This limits groundwater recharge and increases surface runoff, contributing to flooding and erosion.

Lastly, excessive groundwater extraction for agricultural, industrial, or domestic use can lower the water table in a process known as over-extraction. This has long-term consequences, including land subsidence and reduced water supply for future generations.

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Answer:

False

Explanation:

It is false. For example, if a shark stays on land, what will happen. It would end up dying because it needs water and its in a dry environment.

Answer:

11.427L

Explanation:

From the ideal gas law,

PV=nRT

Where;

P=pressure of the gas

V=volume of the gas occupied by the container

n=number of moles of the gas

R=the ideal gas constant=0.0821atmL/mol/K

Given

P=4.258atm

V=?

n=2.0801mol

T=284.92K

From the equation

PV=nRT,

We will make V subject of formula

V=nRT/P

Let's now substitute the values

V=(2.0801×0.0821×284.92)/4.258

V=11.427L

Therefore, the volume of the container is 11.427L

Answer:

11.41L

Explanation:

Data obtained from the question include:

n (number of mole of Br2) = 2.0801 mol

P (pressure) = 4.258 atm

T (temperature) = 284.92K

R (gas constant) = 0.082atm.L/Kmol

V (volume of the container) =?

Applying the ideal gas equation PV = nRT, the volume of the container can be obtained as follow:

PV = nRT

4.258 x V = 2.0801x0.082x284.92

Divide both side by 4.258

V = (2.0801x0.082x284.92)/4.258

V = 11.41L

Therefore, the volume of the container is 11.41L

Answer:

(a) What are the half-lives of these two isotopes? (b) Which one decays at a faster rate? (c) How much of a 1.00-mg sample of each isotope remains after 3 half- ...

Explanation: