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Nady [450]
3 years ago
11

which of the following is a physical change? 1.burning paper 2.grinding wheat 3.electrolysis of water 4.cooking rice​

Chemistry
1 answer:
azamat3 years ago
4 0

Answer:

2 grinding of wheat is just a physical change

plz brainlist

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What are the complex organic compounds concentrated in grapes' skin, pits and stems that gives red wines their characteristic dr
SashulF [63]
Your team has been hired to advice a fictional
agribusiness company named "Merced Grapes
and Wine", or MGW. MGW is located in the
Merced county, California, where the economy is
driven by agriculture, and works with many grape
farmers of the Central Valley providing different
services such as logistics and distribution,
product processing, and commercialization.
MGW has an annual revenue of $35,000,000
thanks to producing and selling 10,000,000 L of
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They spend per year $12,000,000 in logistics,
$8,000,000 in salaries for their approximately
100 employees, $4,750,000 in maintenance
(excluded electricity), $100,000 in electricity,
and $1,000,000 in other costs. The company
wants to renew itself, and you have been called
to help MGW adapting to new opportunities to
save money or to increase their profit. They have
some "raw ideas" of what to do with their waste,
and you must analyze them and advice which
ones, if any, are feasible. Background Wine waste
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stems that are byproducts in wine production,
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grapes to obtain higher quality must. By applying
higher pressure to them, some bitter substances
and other compounds are released, and the
quality of that wine is too low to be
commercialized. This residue is called pomace or
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I need help with option 3 shown below:
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7 0
3 years ago
How are biotic factors different from abiotic factors in an environment?
exis [7]

Answer:

B

Explanation:

Biotic factors are alive. Some examples include plants, animals and fungi.

The “a” in front of abiotic will negate the meaning of the word. Therefore, abiotic means not living. Some examples are rocks, water and air.

So, we know that biotic factors are living, and abiotic factors are not living. Therefore, B is correct.

6 0
3 years ago
A polar commercial antacid contains both Al(OH)3 and Mg(OH)2. Are these compounds Arrhenius bases, Brønsted-Lowry based, or both
seropon [69]

Answer:

Magnesium hydroxide, Mg(OH)2, is an Arrhenius base and therefore also a Brønsted-Lowry base.

However, water can also act as a base by accepting a proton from an acid to become its conjugate base, H3O+. where Al(OH)3 is acting as a Lewis Base.

Explanation:

Arrhenius acids and bases

An Arrhenius acid is any species that increases the concentration of H+start text, H, end text, start superscript, plus, end superscript in aqueous solution.

An Arrhenius base is any species that increases the concentration of OH−start text, O, H, end text, start superscript, minus, end superscript in aqueous solution.

5 0
3 years ago
List two examples of objects at home that use chemical energy and describe what the chemical energy is being transformed into.
mr_godi [17]

Answer: Batteries and Food

Explanation:

On the batteries that we use for example for a watch in the kitchen, occurs a chemistry reaction, called redox between Zn  and MnO2. The Zn is oxidized (in the anode)  and the MnO2 is reduced (in the cathode). In the oxidation, the athom loses electrons and in the reduction the opposites.

Regarding the chemical reactions that occur in the food that we consume, the hydrolisis that occurs in the stomach. The hydrochloric acid that is secreted in the stomach allows the activation of an enzyme, pepsinogen, which hydrolyzes the proteins present in the food consumed. That is, it hydrolyzes the peptide bonds of the proteins, which is between an amino and carboxyl bond of each amino acid that makes them up.

4 0
3 years ago
Which of these is a compound?<br> О<br> co2,<br> O2,<br> Co
Ivanshal [37]

Answer:

co2 is a compound.

Explanation:

Oxygen(O) is an element having atomic number 8 and mass number 16.

Carbondioxide is a compound formed by burning of carbon and organic compound and it is a colorless and odorless gas.

O2  is the molecular form of Oxygen.

Cobalt(Co) is an element having atomic number 27 and mass number 59.

8 0
3 years ago
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