Consider the reaction below to answer the following question: This reaction is an example of: A. A Michael reaction B. A Robinson annulation C. An intramolecular aldol condensation D. An intramolecular Claisen condensation

Answer:

hydrocarbons

Explanation:

hope this is right.. if not sorry:)

Answer:

2 molecules

Explanation:

I don't know how to explain it

The chemical formula of water is H₂O. Then 1 mole of water weighs 18 gram. Hence, 80 gram of water is equal to 4.4 mole.

Chemical element symbols, numbers, and occasionally other symbols like parentheses, dashes, brackets, commas, and plus and minus signs are used in a chemical formula to represent information about the chemical proportions of the atoms that make up a certain chemical compound or molecule.

It displays the constituent elements and how many atoms of each element are found in a single complex molecule. It also represents the compound's molecular weight.

Water has the chemical formula H₂O. Water weights 18 grams per mole. 80 grams of water are therefore equivalent to 4.4 moles.

Thus, The chemical formula of water is H₂O. 80 grams of H₂ contain 4.4 molecules of water.

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Answer:

Reading on left looks like 1.4

Explanation:

Answer:

4.5 °C

Explanation:

According to the law of conservation of energy, the sum of the heat lost by the iron and the heat gained by the water is zero.

Qi + Qw = 0

Qi = -Qw   [1]

We can calculate each heat using the following expression.

Q = c × m × ΔT   [2]

where,

Replacing [2] in [1], we get

ci × mi × ΔTi = -cw × mw × ΔTw

ΔTw = -ci × mi × ΔTi / cw × mw

ΔTw = -0.108 cal/g.°C × 700 g × (-30 °C) / 1 cal/g.°C × 500 g

ΔTw = 4.5 °C

Answer:

Both molarity and formality express concentration as moles of solute per liter of solution. Formality is a substance's total concentration in solution without regard to its specific chemical form. ... The formality of a solution is defined as the number of formula mass of any solute dissolved in 1 litre of solution.

The mass of sodium hydrogen carbonate : 10.5 g

Given

1.5 dm' of CO₂

1 mol gas= 24 L at RTP(25 °C, 1 atm)

Required

the mass of sodium hydrogen carbonate

Solution

Decomposition reaction of Sodium hydrogen carbonate :

2 NaHCO₃ (s) ⇒ Na₂ CO₃ (s) + H₂ O(g) + CO₂ (g)

mol CO₂ :

[tex]\tt mol=\dfrac{1.5}{24}=0.0625[/tex]

From the equation, mol ratio of NaHCO₃ : CO₂ (g) = 2 : 1, so mol NaHCO₃ :

[tex]\tt 2\times 0.0625=0.125[/tex]

Mass NaHCO₃(MW=23+1+12+3.16=84 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=0.125\times 84\\\\mass=10.5[/tex]

The appetite effect cause one to believe is those who witness violence in the media see the world as threatening.

The appetite effect is used as a slang here, if someone is consuming violent media.

If someone is consuming violent media, then his appetite effect will be threatening from the world.

Thus, the correct option is B. Those who witness violence in the media see the world as threatening.

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Answer:

b

Explanation:

edge 2022

Answer:

Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons (or electron density). An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity, the more an atom or a substituent group attracts electrons.

Answer:

The amount of work required to raise the TV from point A to point B is equal to the amount of gravitational potential energy the TV gains from its height above the ground. This is generally true for any object ...

Answer:

0.3hrs

Explanation:

Given parameters:

Average basal rate  = 15L/hr

Volume of oxygen  = 4.7L

Unknown:

Hours of oxygen use  = ?

Solution:

Now to solve this rate problem, we need to find the time;

 Hours of oxygen use  = [tex]\frac{volume of oxygen }{average basal rate}[/tex]  

 Hours of oxygen use  = [tex]\frac{4.7}{15}[/tex]   = 0.3hrs

Answer:

c. electrons of the transition metal ion are excited to higher energies.

Explanation:

Answer:

Density = 0.17 g/L

Explanation:

It is given that,

Volume of the inflated balloon filled with Helium, [tex]V=2.2\times 10^3\ L[/tex]

Mass, m = 374 g

We need to find the density of helium. It is equal to its mass per unit volume. It can be given by :

d =m/V

[tex]d=\dfrac{374\ g}{2.2\times 10^3\ L}\\\\=0.17\ g/L[/tex]

So, the density of helium in the balloon is 0.17 g/L.

Answer:

i think 12 moles of CO2 will be produced

Answer:

[tex]\boxed {\boxed {\sf Almost \ all \ phosphates \ are \ insoluble}}[/tex]

Explanation:

For magnesium phosphate to make an aqueous solution, it must be soluble in water.

Let's check the solubility rules. There are many different lists and versions, but it should mention a rule about phosphates.

Magnesium phosphate is included in "all phosphates" so it is insoluble and can't become an aqueous solution.

Magnesium Phosphate (Mg₃(PO₄)₂) would not make an aqueous solution because it is insoluble in water.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

According to the solubility rule, all phosphates are insoluble in water except sodium and potassium phosphates and thus magnesium phosphate does not form an aqueous.

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Answer:

False

Explanation:

Answer:

I would guess that the MA of the screwdriver is 120N.

Explanation:

I think this because you are adding 30 and 90, since there are two forces being acted on the same place in the same direction.

#teamtrees #WAP (Water And Plant)

Answer:

it losses one neutrons that is hydrogen

Answer:

See detailed explanation.

Explanation:

Hello!

In this case, for the reaction:

[tex]I_2+H_2\rightleftharpoons 2HI[/tex]

It is known that the equilibrium constant tends to be greater than 1; therefore, it is a reaction that tends to go rightwards towards the formation of hydrogen iodide.

a) Here, since the reaction tends to form the product, it is clear that the initial concentration of iodine and hydrogen will decrease as the reaction reaches equilibrium in order to increase the concentration of hydrogen iodide.

b) Yes, it stops at the point in which the following expression:

[tex]\frac{[HI]^2}{[I_2][H_2]}[/tex]

Equals the equilibrium constant.

Best regards!

base

This is the answer

Answer: The wire is still copper and does not change by cutting it

Explanation:

Democritus postulated that all materials were composed of these tiny particles called as "atomos".

Daltons postulates are:.

1. All matter is made of very tiny particles called atoms.

2. Atoms is indivisible.

3. Atoms of a given element are identical in mass and chemical properties.

4. Atoms of different elements have different masses and chemical properties.

5. Atoms combine in the ratio of small whole numbers to form compounds.

6. The relative number and kinds of atoms are constant in a given compound.

Thus when copper wire is cut into the smallest  possible pieces, the atoms were intact as they are indivisible and all atoms have same mass and chemical properties.Thus the wire is still copper and does not change by cutting it

Answer:

I need this too but nobody knows how :(

Explanation:

Answer:

λ = 0.45×10⁻⁶ m

Explanation:

Given data:

Wavelength of blue light = ?

Frequency of blue light = 6.69×10¹⁴ s⁻¹

Solution:

Formula;

Speed of wave = wavelength × frequency

Speed of wave = 3.00×10⁸ m/s

by putting vales,

3.00×10⁸ m/s = λ × 6.69×10¹⁴ s⁻¹

λ = 3.00×10⁸ m/s / 6.69×10¹⁴ s⁻¹

λ = 0.45×10⁻⁶ m

Answer:

C. A human shivers when exposed to cold weather.

Explanation:

Homeostasis simply refers to balance, which is desirable in the context of an organism. In this problem, the only one that demonstrates this is a human shivers when exposed to cold weather. By using kinetic energy, heat is generated, maintaining a balance, so to speak.

(btw you may find it more helpful to post these types of problems under biology in the future.)

Answer:

Exposed surface area

Explanation:

The powdered calcium carbonate will react faster with hydrochloric acid than calcium carbonate chips due to the exposed surface area.

Powdered calcium carbonate has a larger surface area compared to the chips. And, the larger the surface area exposed on a body, the faster the reaction it will undergo.

For the same masses of a solid substance, the smaller the particle size of each form, the larger the surface area exposed to reaction.

The surface area exposed proportionally affects the rate of reaction.

Answer:

1 and 2

Explanation:

The given equation is:

        Cl₂  +  H₂   →   2HCl

A coefficient is the variable or number before a chemical specie.

In this reaction Cl₂ and H₂ are the reactants;

  The coefficient of Cl₂ is 1,

                                   H₂ is 1,

                                  HCl is 2

The subscript is the number to the lower power after a chemical specie is denoted.

    For Cl₂, it is 2

A number before a chemical atom or molecule is called a coefficient. The coefficient of chlorine is one (1), and its subscript is two (2).

A subscript is a number or symbol written at the bottom right of the chemical atom or the molecule in a compound.

The balanced chemical reaction is shown as:

[tex]\rm Cl_{2} + H_{2} \rightarrow 2HCl[/tex]

The coefficient in chlorine is 1, hydrogen is 1, and hydrochloric acid is 2. The subscript in chlorine gas is 2, and hydrogen gas is 2.

Therefore, the coefficient is 1, and the subscript is 2.

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Answer:

The answer would be cation

Explanation:

Answer:

it's an anion

if it has more electrons than protons, then it has a negative net charge making it an anion

Answer:

isotopes for the first blank space

Answer:

I think it's tornado

Explanation:

Answer: should be d. then

(sorry if im wrong)

:(

i feel so stupi.d

(i changed my answer to d.)