What is the molecular formula of the compound?Express your answer as a chemical formula.

Crystallization is a process of separation of the solid substances in an object located in the solution as crystal particles.

The chemical process of Crystallization refers to a procedure in which we apply different methods in a solution in order to separate crystals, which are solids compounds that may be considered solutes in such media.

Therefore, with this data, we can see that the chemical process of crystallization separates the solutes in a given solution as solid crystal particles that can be used in other applications.

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The statement among the available options that describes the result of the study is that less than 50% of the people never felt phantom pain. Option 2.

In order to interpret the data and find the best description of the outcome of the experiment, the response needs to be grouped into 2 from the 3 available responses.

Since those that phantom pain sometimes and always belong to the same category, the respondents can be summed up into one:

Number of those that sometimes feel phantom pain = 534

Number of those that always feel phantom pain = 193

Total number of people that feel phantom pain = 534 + 193

                                                                                = 727 people

Number of people that never feel phantom pain = 183

Total number of respondents in the experiment = 183 + 534 + 193

                                                                                = 910 people

Percentage of respondents that felt phantom pain = 727/910 x 100

                                                                                     = 79.89%

Percentage of people that never felt phantom pain = 183/910 x 100

                                                                                      = 20.11%

Percentage of people that felt phantom pain all the time = 193/910 x 100

                                                                                      = 21.21%

Thus, the statement that correctly describes the outcome of the experiment of all the statements is that less than 50% never felt phantom pain.

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The question requires us to calculate the number of moles of NaCl in 1.66 L of a 0.400 M NaCl solution.

To answer this question, we need to keep in mind that the molar concentration provides the amount of moles in one liter solution. Thus, we can write that:

1 L of NaCl solution -------------- 0.400 mol of NaCl

We can use this information to calculate the amount of NaCl, in moles, in 1.66 L in a 0.400 M NaCl solution:

1 L of NaCl solution -------------- 0.400 mol of NaCl

1.66 L of NaCl solution --------- x

Solving for x, we have:

Therefore, there are 0.664 moles of NaCl in 1.66 L of a 0.400 M NaCl solution.

Macroscopic algae are called Seaweed.

The largest and most complex marine algae are called seaweeds while the most complex freshwater forms are the Charophyta a division of green algae which includes, for example, Spirogyra and stoneworts. Algae are almost ubiquitous throughout the world and can be categorized ecologically by their habitats.

Planktonic algae are microscopic and grow suspended in the water, whereas neustonic algae grow on the water's surface and can be micro- or macroscopic. Phytoplankton refers to a group of plankton that is photosynthetic. Most of them are microscopic algal species or microalgae. The algae of this paraphyletic group Charophyta were previously included in Chlorophyta so green algae and Chlorophyta in this definition were synonyms.

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The percent mass composition of carbon of the unknown compound is 42.8%.

The mass percentage of carbon in the given unknown compound is calculated as follows:

molar mass of carbon dioxide = 44.0 g/mol

molar mass of carbon = 12 g/mol

molar mass of water = 18 g/mol

molar mass of hydrogen = 1.0 g/mol

Moles of carbon dioxide = 2.31/44

Moles of carbon dioxide = 0.0525 moles

Moles of Carbon = 0.0525 moles

mass of carbon = 0.0525 * 12

mass of carbon = 0.105 g

Moles of water = 1.26/18

Moles of water = 0.07 moles

Moles of hydrogen = 0.07 * 2

Moles of hydrogen = 0.14 moles

mass of hydrogen = 0.14 * 1

mass of hydrogen = 0.14

mass of compound = 0.105 + 0.14

mass of compound = 0.245

Percentage mass of carbon = 0.105/0.245 * 100

Percentage mass of carbon = 42.8%

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Answer: it would cause a serious shock

Explanation:

Explanation:

The polarity of a bond is given by the difference in electronegativity between the two atoms that form said bond.

Answer:

in an ionic bond, atoms lose valence electrons and become positively charged

Explanation:

To clarify, the atom that loses the electrons becomes a positively charged ion (cation), and the atom that gains them becomes a negatively charged ion (anion).

Answer: B. Shared electrons

Explanation: Electrons are shared in covalent bonds. The other options are all properties of metallic bonds.

The substance must change into a new substance is the observation that scientist must list for a chemical reaction to happen.

A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present). The study of chemical processes involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry.

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An acid-base reaction occurs when a fatty acid interacts with NaOH, and the fatty acid transfers a proton to the base to produce sodium carboxylate salt and water.

Triglycerides are converted into glycerol and "soap" when they are saponified, or reacted with sodium or potassium hydroxide (lye). The triglycerides are often made of vegetable or animal fats. A hard soap is created when sodium hydroxide is used.

Fats, oils, or lipids (the acid) are turned into soap by the process of saponification by mixing them with sodium hydroxide (the base). Friction and heat from the chemical reaction are essential. The neutralization of the acid and base occurs during saponification.

Thus, any type of fat and sodium hydroxide react chemically in a process known as saponification.

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If the barometer reading is too high, the molar mass of the compound will be too low. If the barometer reading is too low, the molar mass of the compound will be too high.

The molar mass of the compound will be reported as higher than the actual value. This is because the barometer is used to calculate the pressure of the gas, and the pressure is used to calculate the molar mass. If the pressure is too high, the molar mass will be too low.

A barometer is an instrument that is used to measure the pressure of a gas. The pressure of a gas is the force that the gas exerts on a surface. The pressure of a gas is usually expressed in units of atmospheres.The molar mass of a substance is the mass of one mole of the substance. The molar mass of a substance is usually expressed in grams per mole. Hence if the barometer reading is recorded to be higher than the actual value, the reported value of the molar mass of the compound will be too low.

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Balance the reaction between sno32- and s2- to form s and sno22- in basic solution. when you have balanced the equation using the smallest integers possible, enter the coefficients of the species shown. sno32- s2- s sno22- water appears in the balanced equation as a fill in the blank 5 (reactant, product, neither) with a coefficient of . (enter 0 for neither.) how many electrons are transferred in this.

2 electrons are transferred in this reaction

Water will appear as a reactant with a coefficient of 1, here as can be seen from above equation.

Electrons are the smallest of the particles that make up an atom, and they convey a poor rate. The wide variety of protons and electrons is equal in a neutral atom. The hydrogen atom, as an example, has simply one electron and one proton. The uranium atom, alternatively, has ninety two protons, and therefore, 92 electrons

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The compound that would have the stronger carbon carbon bond is acetylene.

The term bond energy has to do with the energy that is required to form a bond. It can also be seen as the energy that has to be supplied in order to break the bonds that are in the compound.

Now we know that the strength of a bond also has a lot to do with the length of the bond. We know that shorter bonds that have a greater s character are the ones that are always the stronger bonds. We have to factor in the fact that acetylene has a triple bond and ethylene has a double bond.

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The oxidation number of hydrogen in H2 reactant will be 0.

The number assigned to each element in a chemical combination would be the simplest definition of the oxidation number. The amount of electrons that atoms in a molecule could share, lose or gain during forming chemical connections with other atoms of such a particular character would be known as the oxidation number.

Hydrogen can be considered as free elements and it is known that free elements have 0 oxidation number .Here, H2 element is also as a free element. So, it has 0 oxidation number.

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Which compound has the bigger Lattice energy?



a) CaI₂ CaCl₂

To find the Lattice Energy we have to pay attention to the ions that form each compound.

In our case, both Cations are the same: Ca2+

So we have to find the difference between the anions: I- and Cl-

Answer

D. 6

Explanation

Given that:

What to find:

The coefficient of H⁺ when the given equation is balanced with the smallest possible integer coefficients.

Solution:

The given equation is an example of an oxidation-reduction (redox) reaction

The first step is to identify the half equations:

The next step is to balance the half equations molecularly follow by balancing the charge:

The final step is to combine the half equations and simplified:

Therefore, the coefficient of H⁺ in the balanced equation above is 6.

The correct answer is D. 6

There are a lot of ionic compounds in fireworks, most of them are salts, like: Strontium Nitrate and Strontium Carbonate ( both in the color red); Calcium Carbonate and Calcium Chloride (orange); Sodium Nitrate, Sodium Oxalate (yellow); Barium Nitrate and Barium Carbonate (green) and so on. For the gunpowder itself we have the Potassium Nitrate as an ionic compound.

The chemical reaction for the combustion of black powder is:

6KNO3 + C7H4O + 2S -> K2CO3 + K2SO4 + K2S + 4CO2 + 2CO + 2 H2O + 3N2

It's not just a single reaction, but this is a general representation of it.

The energy change associated with the transition from n = 2 to n = 5 in the hydrogen atom is 2.856 eV.

Planck's equation, E = h, relates the energy change connected to a transition to the frequency of the electromagnetic wave. The equation c = then links the wave's frequency to both its wavelength and the speed of light.

The expression for the change in energy for a transition from a state  to a state  in a hydrogen atom is

                             E = -13.6Z² (1/Nf² - 1/Ni²)

where Z is the atomic number, which is 1 for hydrogen. Substituting

Nf= 5 and Ni= 2

E = -13.6 × (1/ (5)²- 1/ (2)²)

E = -13.6 × - 0.21

E =  2.856 eV

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A gaseous compound is subjected to increased pressure. What is happening to the temperature at the same time?

We assume the gas is in a container.

If we increase the pressure, is a direct relationship with temperature, so the temperature increases, but if the volume is not constant, it will decrease.

Answer: increased temperature, decreased volume.

Answer:

- Anode: Co3+ | Co2+

- Cathode: Ni | Ni2+

Explanation:

The anode is where oxidation reaction occurs, and the cathode is where reduction reaction occurs.

From the table of reduction potencials, we find that:

- Co reaction:

- Ni reaction:

Now, to find out which one is the anode and which one is the cathode, it is necessary to compare the reduction potencials.

The reaction of Ni have negative potentials, so Ni will be the anode and Co will be the cathode.

Kinetic energy liberated is 10.2 eV from the equation of photoelectric effect

What is photoelectric effect?

Photoelectric effect is a phenomenon in which electrons are ejected from the surface of a metal when light is incident on it.

What is the kinetic energy?

According to Einstein's photoelectric equation, we know that kinetic energy is the difference between the energy of incident photon and the work function of the metal.

KE = E - Wo

KE = kinetic energy

E = energy of the photon

Wo = work function

Now we know that

E = hf

h = Plank's constant (6.6 × 10-³⁴ )

f = frequency

E = 6.6 × 10-³⁴ × 3.62 × 10¹⁵

= 2.39 × 10-¹⁸J or 14.9 eV

1 eV = 1.6 × 10-¹⁹ J

Substituting

KE = 14.9eV - 4.7eV

KE = 10.2eV

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To solve the question we need to:

Step 1 - Calculate the molar mass of BaF2

Step 2 - Use the following formula: moles = mass/molar mass

Step 1:

Atomic mass of Ba is 137.33 g/mol

Atomic mass of F is 19 g/mol

We can find these values at periodic table.

We multiply the atomic mass by the quantity of atoms of each element:

(1x137.33) + (2x19) = 175.33 g/mol

So the molar mass of BaF2 is 175.33 g/mol

Step 2:

moles = mass/molar mass

moles = 147/175.55

moles = 0.838 moles

Answer: 0.838 moles of BaF2

False, the effusion of the gas will be faster than the carbon dioxide.

The process of a gas escaping from a container through a hole that is significantly smaller in diameter than the molecules' mean free route is known as effusion in physics and chemistry. The gas escape is caused by the pressure difference between the container and the outside, which is why such a hole is frequently referred to as a pinhole. Since there are almost no molecular collisions in the vicinity of the hole under these circumstances, nearly all molecules that reach the hole continue and pass through it.

Graham's law of effusion can be used to find the rate of effusion: rate of effusion is inversely proportional to the molar mass of the gas.

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In order to properly balance an equation, we need to make sure that the same amount of elements on the reactants side matches the number of elements on the products side, we can do that by increasing the number in front of each molecule, the so called stoichiometric coefficient.

The proper balancing for this question is:

2 C2H2 + 5 O2 -> 4 CO2 + 2 H2O

Therefore the coefficients are:

2, 5, 4, 2

Answer

100 grams

Explanation

Given that:

The density of water = 1 gram/cm³

The volume of the water = 100 cm³

What to find:

The mass of the 100 cm³ of water.

Step-by-step solution:

The mass of the water can be calculated using the formula:

Therefore, this means that the mass of 100 cm3 of water should be 100 grams.

Answer:

C is the answer

Explanation:

The correct order for the hydrolysis of sucrose reaction is sucrose(H2O)>sucrase>glucose>fructose.

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