Another name for a "oxidation-reduction" reaction is

Why did mendeleev improve newlands periodic table

Charra [1.4K]

Answer: Mendeleev improve newlands periodic table because he swapped the order of some elements if that fitted their properties better.

Explanation: I hope this helps!... :)

8 0

3 years ago

Postlab Questions (2 pts ea; 8 pts total be specific and answer all in complete sentences): 1. How would you distinguish benzald

slega [8]

Answer:

Using the Iodoform test, we can differentiate both compounds.

Explanation:

Benzaldehyde (C6H5CHO -an aldehyde) and Acetophenone (C6H5COCH3 - a methyl ketone) can be differentiated by reacting both compounds with iodine in a basic (NaOH) solutions.

The methyl ketone (acetophenone) gives a pale yellow precipitate of triiodomethane (iodoform) while the aldehyde (benzaldehyde) would not react.

This is known as the IODOFORM test and is indicative for methyl ketones

7 0

3 years ago

18. Sucralose contains which two functional groups: (2 points)

sasho [114]

Answer:

The correct answer is option B and D, that is, halogen (chlorine) and hydroxyl.

Explanation:

An artificial sweetener and sugar substitute is sucralose. It is noncaloric as the majority of the sucralose ingested does not get dissociated within the body. The generation of sucralose takes place by the chlorination of sucrose. It is about 300 to 1000 times sweeter in comparison to sucrose.

The consumption of sucralose is safe for both nondiabetics and diabetics, it is used in various food and beverage components due to non-caloric sweetener characteristics. It does not affect the levels of insulin and does not affect dental health. As it is produced by chlorination of sucrose, thus, the functional groups present in it are a halogen (chlorine) and a hydroxyl.

6 0

3 years ago

In NMR if a chemical shift(δ) is 211.5 ppm from the tetramethylsilane (TMS) standard and the spectrometer frequency is 556 MHz,

Vika [28.1K]

Answer:

The answer is: 11759 Hz

Explanation:

Given: Chemical shift: δ = 211.5 ppm, Spectrometer frequency = 556 MHz = 556 × 10⁶ Hz

In NMR spectroscopy, the chemical shift (δ), expressed in ppm, of a given nucleus is given by the equation:

$\delta (ppm) = \frac{Observed\,frequency (Hz)}{Frequency\,\, of\,\,the\,Spectrometer (MHz)} \times 10^{6}$

$\therefore Observed\,frequency (Hz)= \frac{\delta (ppm)\times Frequency\,\, of\,\,the\,Spectrometer (MHz)}{10^{6}}$

$Observed\,frequency= \frac{211.5 ppm \times 556 \times 10^{6} Hz}{10^{6}} = 11759 Hz$

<u>Therefore, the signal is at 11759 Hz from the TMS.</u>

6 0

4 years ago

Type the correct answer in the box. Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant

Zepler [3.9K]

Molar mass can be given as the mass of each constitutive element in the formula unit. The molar mass of aluminum oxide is 101.957 grams.

<h3>What is a formula unit?</h3>

Formula unit can be defined as the one unit of the molecular formula of the compound. It describes the number of atoms of each element present in the compound.

The formula unit for Aluminum oxide is $\rm Al_2O_3$ . The molar mass has been the sum of the mass of aluminum and oxygen.

The molar mass of aluminum oxide has been given as:

$\rm Molar\;mass=2\;\times\;Al+3\;\times\;O\\Molar\;mass=2\;\times\;26.98\;+\;3\;\times\;15.99\;grams\\Molar\;mass=101.957\;grams$

The molar mass of aluminum oxide is 101.957 grams.

Learn more about molar mass, here:

brainly.com/question/12127540

6 0

3 years ago