what is the difference between hypertonic and hypotonic

Answer:

compounds

Explanation:

The moles of silver nitrate required to form 0.854 mol silver ion has been 0.854 mol.

The balanced chemical equation for the dissolution of silver nitrate has been:

[tex]\rm AgNO_3\;\rightarrow\;Ag^+\;+\;NO_3^-[/tex]

The aqueous solution of silver nitrate has been dissociated into the constituent silver and nitrate ions.

In a balanced chemical equation, the coefficient has been equivalent to the moles of each reactant forming the moles of product.

From, the balanced equation,

[tex]\rm 1\;mol\;AgNO_3=1\;mol\;Ag[/tex]

The given moles of Silver has been 0.854 mol. Thus, the moles of silver nitrate required has been given as:

[tex]\rm 1\;mol\;Ag^+=1\;mol\;AgNO_3\\0.854\;mol\;Ag^+=0.854\;\times\;1\;mol\;AgNO_3\\0.854\;mol\;Ag^+=0.854\;mol\;AgNO_3[/tex]

The moles of silver nitrate required to form 0.854 mol silver ion has been 0.854 mol.

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Answer:

1. Dissolving powder in milk - Chemical

  - It is chemical because the milk has changed on a molecular level

2. Toasting bread - Chemical

   - It is chemical because adding heat to the bread cooks it, therefore

     changing it on a molecular level

3. Melting cheese - Physical

   - It is physical because the physical appearance was the only change

4. Slicing apples or bannanas - Physical

   - It is physical because the physical appearance was the only change

5. Frying an egg - Chemical

   - It is chemical because new particles were formed

6. Milk souring - Chemical

   -  It is chemical because it is forming a new product (lactic acid)

Explanation:

Physical Change occurs when the particles of a substance become rearranged, but do not change into different particles.  

Chemical change occurs when a new substance is formed. This process is irreversable.

Answer:

give the preson above brainly bc there right

Explanation:

Answer:

answer is 2,445..or B as its noted

Answer:

40

Explanation:

I'm not sure

Answer: P4S7

Explanation:

Answer:

Magnesium is Mg.

Phosphorus is P.

Answer:

A. Motors and generators are opposite processes

Explanation:

B, C, and D are wrong because, the term electrical generator is used to describe a range of devices that convert mechanical energy into electricity. A motor converts electrical energy into mechanical, which is the opposite process to the electrical generator.

Answer:

Basically A, C, D, F

Explanation:

Summarizing the answer

Using only two types of seeds, both from the same source.

Experimental error refers to the uncertainties or mistakes that can occur during scientific experiments, leading to inaccuracies in the results. These errors can arise due to a variety of reasons, such as human error, instrumental error, environmental factors, and methodological issues. The presence of experimental error can make it difficult to draw accurate conclusions from the data obtained during an experiment.

Scientists use various procedures to reduce experimental error and improve the accuracy and reliability of their results. These procedures can include:

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All three elements  in the periodic table will for sure have characteristic of mass and volume.

An element  is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom which is characteristic of it's own. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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Answer:

Molar volume at STP can be used to convert from moles to gas volume and from gas volume to moles. The equality of 1 mole = 22.4 L is the basis for the conversion factor.

Explanation:

Answer:

Electrons are stored in different electron shells with the nucleus in the center. Depending on the size of the element, the electrons may need more shells, making the electrons further away from the nucleus.

Explanation:

Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.  the statement "electrons are always located close to the nucleus of an atom" is not really accurate.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge.

Electrons always move in fixed orbit around the nucleus with a particular force. Electrons may or may not be close to the nucleus. Depending on the size of the element, the electrons may need more shells, making the electrons further away from the nucleus.

Therefore,  the statement "electrons are always located close to the nucleus of an atom" is not really accurate.

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Answer:

sugar and salt, as they can dissolve in water. Sugar and salt have a high solubility in water. So, sugar and salt can form a solution with water.

Explanation:

The concentration of the diprotic acid equals 3.4 M

We'll begin by writing the balanced equation for the reaction.

H₂X + 2NaOH —> Na₂X + 2H₂O

From the balanced equation above,

From the question given above, the following data were obtained:

MaVa / MbVb = nA/nB

(Ma × 25) / (1.95 × 87.42) = 1/2

(Ma × 25) / 170.469 = 1/2

Cross multiply

Ma × 25 × 2 = 170.469

Ma × 50 = 170.469

Divide both side by 50

Ma = 170.469 / 50

Ma = 3.4 M

Therefore, the concentration of the acid, H₂X is 3.4 M

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Answer:

1. Ionic bonds result from transfer of electrons, but covalent bonds are formed by sharing.

2. Ions are arranged in a three-dimensional array (like crystals). Covalently bonded substances exist as discrete molecular units.

3. Ionic compounds often dissociate into ions in solution, but covalently bonded molecules retain their molecular identity in solution.

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Answer:

Blank #1: Polyatomic

Blank #2: 2 (see explanation)

Blank #3: 1 (see explanation)

Explanation

Both the ammonium ion  and the sulfate ion  contain more than one atom in each ion. The two species are thus polyatomic. The chloride ion , for example, is monoatomic.

Superscripts above formulae of the ions indicate their charge. Each ammonium ion carries a positive one (+1) charge. Each sulfate ion carries a charge of negative two (-2).

Ammonium sulfate is an ionic compound. A sample of this compound contain myriads of ammonium ions and sulfate ions. The ions are packed in three-dimensional lattices. Thus unlike water, ammonium sulfate does not exist as molecules in nature.

Assuming that the second and third blanks refers to a formula unit, rather than a molecule, of ammonium sulfate. The empirical formula of ammonium sulfate gives the minimum whole-number ratio between the two ions in a sample.

Charges shall balance between the two ions. Ammonium ions are of charge +1. Sulfate ions are of charge -2. The sample shall thus contain two ammonium ions for every one sulfate ion.

The empirical formula of ammonium sulfate is therefore .

There are thus two ammonium ions  and one sulfate ion  in each formula unit of ammonium sulfate.

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore,  a molecule of the ammonium sulfate consists of one NH₄⁺ ions and one SO₄²⁻ ions.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound.  Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. The compound of ammonium sulfate consists of two ions. NH₄⁺ and SO₄²⁻ both of which are polyatomic ions. A molecule of the ammonium sulfate consists of one NH₄⁺  ions and one SO₄²⁻ ions.

Therefore,  a molecule of the ammonium sulfate consists of one  NH₄⁺ ions and one SO₄²⁻ ions.

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The mass of water needed to absorb 456 J is 1.44 g

We'll begin by calculating the change in the temperature of the water.

Initial temperature of water (T₁) = 22.7 °C

Final temperature (T₂) = 98.3 °C

ΔT = T₂ – T₁

ΔT = 98.3 – 22.7

Heat absorbed (Q) = 456 J

Change in temperature (ΔT) = 75.6 °C

Specific heat capacity of water (C) = 4.184 J/gºC

Q = MCΔT

456 = M × 4.184 × 75.6

456 = M × 316.3104

Divide both side by 316.3104

M = 456 / 316.3104

Therefore, the mass of the water is 1.44 g

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The two ways the cathode ray tube experiment changed scientists'

understanding of the atom was it showing that atoms can be divided into

smaller parts and all atoms contain electrons.

J.J Thompson was the scientist which performed the cathode ray tube

experiment and was able to ascertain it was negatively charged as a result

of it being deflected to the positive electrode.

His observation showed that the atoms contain sub-atomic particles called

electrons which are negatively charged.

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It is recommended only for the second type of candy to be taken off the market.

Based on the background information, if a candy shows a 0,62 Rf value in the chromatography it is considered potentially dangerous, and therefore it should be taken off the market.

The Rf value is calculated using the following formula:

Now, let's find out if any of the components has an Rf equal to 0,62.

Note: To determine the distances I measured the image using a ruler and you can do the same, this will not alter the results.

     2. Sample 2

This means sample 2 has the 0.62 Rf value and therefore it needs to be taken off the market.

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Answer:

1.Hydrogen: 1s1 2 - Helium: 1s2

45 – Rhodium: [Kr], 5s2, 4d7 46 – Palladium: [Kr], 5s2, 4d8

47 – Silver: [Kr], 5s2, 4d9 48 – Cadmium: [Kr], 5s2, 4d10

49 – Indium: [Kr], 5s2, 4d10, 5p1 50 – Tin: [Kr], 5s2, 4d10, 5p2

Thus 43 electrons, so the neutral atom has atomic number 43. Look at a periodic table and you see that this element is technetium.

Element Atomic Number Element Symbol Element Electron Configuration

45 Rh [Kr] 4d8 5s1

46 Pd [Kr] 4d10

47 Ag [Kr] 4d10 5s1

48 Cd [Kr] 4d10 5s2

Answer:

The Atmosphere Is a separate layer And Also could be classified as the Closest layer

Explanation:

Answer:

Because in order to have cis or trans configuration both carbon of alkene need to have a hydrogen

Barium is Ba. Atomic no. 56 and atomic mass =137.3.

Phosphate is naturally occurring form of phosphorus. Phosphate is P. Atomin no. 15 and atomic mass =31.0.

Answer:

how much matter is in an object

Explanation:

Answer:

Answer: 2.1 minutes

Explanation: Based on the graph, what is the approximate half-life of the reaction shown below

Answer:

d

Explanation:

......................

Answer:

D. vinegar

Explanation:

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