What is the relative molecular mass, Mr, of butanol, C4H9OH

A- 15
B- 37
C- 74
D- 148​

Answer:

With the friction on, the minimum height I can place the skater so that he makes it all the way around the loop is 6 meters. This is about a meter higher than if the friction were turned off. The “lost” energy is going towards thermal energy. This means in real life that heat is being created due to the friction.

Explanation:

Answer:

With the friction on, the minimum height I can place the skater so that he makes it all the way around the loop is 6 meters. This is about a meter higher than if the friction were turned off. The “lost” energy is going towards thermal energy. This means in real life that heat is being created due to the friction.

Explanation:

Answer:

the double carbon to oxygen bond

Answer:

Ans B)=====> Dorsal Horn

Two arms, each known as a Dorsal Horn, are formed by the core grey matter at the back of the spinal cord. In the image, the region labeled “ A “ is called the Dorsal Horn. Therefore, option B is correct.

One of the gray longitudinal columns discovered inside the spinal cord is the dorsal horn. Through the dorsal roots of the spinal nerves, it predominantly serves as the end of primary afferent fibers.

A complex network of excitatory and inhibitory interneurons, as well as projection neurons, make up the dorsal horn, which serves as an intermediary processing center for this information. It transmits the processed somatosensory information from the spinal cord to the brain.

The cell bodies of sensory neurons are located in the dorsal horns. The ventral horns are two arms of central grey matter that are found at the front of the spinal cord.

Thus, option B is correct.

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Physical changes can be reversed and chemical changes can’t be reversed. A physical property is a characteristic which can be identified without changing the substance but to identify a chemical property, you do have to change the substance.

Answer:

The answer is C.

Explanation:

i got a 100 on the test

The theoretical yield of carbon dioxide, CO₂ obtained from the reaction is 8.93 g

We'll begin by calculating the mass of citric acid, H₃C₆H₅O₇ that reacted and the mass of carbon dioxide, CO₂ produced from the balanced equation.

H₃C₆H₅O₇ + 3NaHCO₃ —> 3CO₂ + 3H₂O + Na₃C₆H₅O₇

Molar mass of H₃C₆H₅O₇ = (3×1) + (12×6) + (5×1) + (7×16) = 192 g/mol

Mass of H₃C₆H₅O₇ from the balanced equation = 1 × 192 = 192 g

Molar mass of CO₂ = 12 + (2 × 16) = 44 g/mol

Mass of CO₂ from the balanced equation = 3 × 44 = 132 g

From the balanced equation above,

192 g of H₃C₆H₅O₇ reacted to produce 132 g of CO₂

Finally, we shall determine the theoretical yield of CO₂. This can be obtained as follow:

From the balanced equation above,

192 g of H₃C₆H₅O₇ reacted to produce 132 g of CO₂.

Therefore,

13 g of H₃C₆H₅O₇ will react to produce = (13 × 132) / 192 = 8.93 g of CO₂.

Thus, the theoretical yield of CO₂ is 8.93 g

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Answer:  Both A and C

Explanation:

It is a combustion reaction that is exothermic.  It is a chemical reaction.  Choices A and C are both correct, so I'm not certain what criteria are most important in answering.

The energy of a single photon of this frequency is 1.638 × 10⁻¹⁸ J

Using Planck's equation, the energy of the photon E = hf where h = Planck's constant = 6.63 × 10⁻³⁴ Js and f = frequency of ultraviolet light = 2.47 × 10⁻¹⁵ Hz.

Substituting the values of the variables into the equation, we have

E = hf

E = 6.63 × 10⁻³⁴ Js × 2.47 × 10¹⁵ Hz.

E = 16.3761 × 10⁻¹⁹ J

E = 1.63761 × 10⁻¹⁸ J

E ≅ 1.638 × 10⁻¹⁸ J

So, the energy of a single photon of this frequency is 1.638 × 10⁻¹⁸ J

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Answer is: the current solution is unsaturated.

Unsaturated solution means that more of a substance can be dissolve.

For example:

Solubility of potassium chlorate (KClO₃) at 100 grams of water at 80°C is 37.5 g, that means that all 37.5 g is completely dissolves, this is the saturated solution.

If we add 20 grams of potassium chlorate in 100 grams of water, there is less solute than the saturated solution, so this is unsaturated solution.

Answer:

1 = D

2 = C

3 = A

4 = F

5 = G

6 = B

7 = E

Answer:

neutrons = mass number - atomic number

. = 39-19 =20

Answer:

D

Explanation:

A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy without itself being consumed by the reaction.

Activation energy is the minimum amount of energy required for a chemical reaction to proceed in the forward direction.

A catalyst increases the reaction rate by providing an alternative pathway or mechanism for the reaction

Answer:

May be third one because of the formation of H2(hydrogen)on the product side.

The equation that shows the valued combustion reaction is [tex]C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O[/tex]

The following information should be considered:

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Answer:

when the chemical composition of a substance change and it is not reversible it is called phase change.for example: turning milk in to yogurt

Answer:

In chemistry, the law of conservation of mass states that the mass of the products (the chemical substances created by a chemical reaction) will always equal the mass of the reactants (the substances that make the chemical reaction). Think of it as being similar to balancing an algebraic equation.

Explanation:

(winks and runs off)

Answer:

Mass cannot be created or destroyed.

Explanation:

        Conservation of mass is "a principle stating that mass cannot be created or destroyed" (Oxford Languages).

Have a nice day! (there is not much rewording/etc you can do here as it is a simple principle, but I hope this will still help!)

    I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

D. Mitochondria

Explanation:

The mitochondria, labeled the powerhouse of the cell, are the organelle responsible for energy production within the cell

Answer:

Explanation:

The wavelength of a wave can be found by using the formula

[tex]\lambda = \frac{c}{f} \\[/tex]

where

c is the speed of the wave

f is the frequency

From the question

c = 5 m/s

f = 2.5 Hz

We have

[tex] \lambda = \frac{5}{2.5} = 2 \\ [/tex]

We have the final answer as

Hope this helps you

Explanation:

covalent bond enjoy your anseer

Answer:

okay?

Explanation:

Answer:

[tex]\huge\blue{\boxed{\tt{\colorbox{black}{babyheaven}}}}[/tex]

Answer:

(i)

A → CH3CH2CH3 ( Propane )

B → CH3CH(Cl)CH3 ( 2-Chloropropane )

C → No product

D→ CH3CH=CH2 ( 2-propene )

E → CH3CH2COOH ( Propanoic acid )

(ii)

Reagent X → Acidified water [ H+ / H2O ]

Reagent Y → Bromine with Carbon tetrachloride [ Br2 / CCl4 ]

Reagent Z → Sodium hydroxide [NaOH]

Answer:

Physically, a gene is a segment (or segments) of a chromosome. Functionally, a gene can play many different roles within a cell.

Explanation:

Answer:

bacteria

Explanation:

The pathogen below is a single-celled organism without a nucleus that can cause illness in a humans.

i dont know im only doing for points

Answer: They begin to overlap

Answer: 15768 seconds

Explanation:            (50 years) x (365 da/yr) x (86,400 sec/da)

        =      (50 x 365 x 86,400)  seconds

        =        1.5768 x 10⁹ seconds

Answer:

Metals

Explanation:

There are more metals next time trying checking the table they will be in colored squares to count to see which has more! HOPE THIS HELPED!

<3 :D

Filling the rock cycle steps with the world Bank is as follows;

Additionally, the conversion of igneous, Sedimentary and metamorphous rock to sediments happens by a process termed Erosion/Weathering.

Also, conversion of magma to igneous rock is by cooling and vice versa is by heating.

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Answer:

digestion

Explanation:

In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

Answer:

Go through your kitchen waste. Vegetables and fruit peelings are the number one food remnants you should keep aside. ...

Add other organic materials to the compost. ...

Collect some garden waste. ...

Create the compost. ...

Apply the fertilizer.

Answer:

Organic fertilizers are an essential source for plant nutrients and a soil conditioner in agriculture. Due to its sources and the composition of the organic inputs as well as the type, functionality and failures of the applied treatment process, the organic fertilizer may contain various amounts of infectious agents and toxic chemicals, especially the antibiotics that can be introduced to the subsequent food chain. A range of human and animal pathogens of bacterial, viral and parasitic origin have been the cause of food-borne epidemics due to unintended contamination from organic fertilizers. The use of antibiotics by humans and in animal feeds will also end up in the organic fertilizers. These antibiotics and other chemicals, depending on the sources of the organics, will enhance the likelihood of occurrence of resistant and multi-resistant strains of microorganisms in society and have been reported to cause ecotoxicological environmental effects and disruption of the ecological balance. Exposure of microorganisms to sublethal concentration of antibiotics in the organic products induces antibiotic resistance. WHO guidelines for the reuse of excreta and other organic matters identify the risk for the exposed groups to the reuse of the

Explanation: