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Katena32 [7]
3 years ago
12

What substances can be separated into simpler substances only by chemical means?

Chemistry
1 answer:
Mnenie [13.5K]3 years ago
6 0

A compound is a substance that can be separated into simpler substances only by chemical means.

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What are geneitcailly modifies foods?
Iteru [2.4K]

Answer:

Genetically modified foods, also known as genetically engineered foods, or bioengineered foods are foods produced from organisms that have had changes introduced into their DNA using the methods of genetic engineering

Explanation:

3 0
2 years ago
Read 2 more answers
Which label belongs in the region marked X?
lubasha [3.4K]

Answer:

A) involves changes in temperature

Explanation:

The figure is missing, but I assume that the region marked X represents the region in common between Gay-Lussac's law and Charle's Law.

Gay-Lussac's law states that:

"For an ideal gas kept at constant volume, the pressure of the gas is directly proportional to its absolute temperature"

Mathematically, it can be written as

p\propto T

where p is the pressure of the gas and T its absolute temperature.

Charle's Law states that:

"For an ideal gas kept at constant pressure, the volume of the gas is directly proportional to its absolute temperature"

Mathematically, it can be written as

V\propto T

where V is the volume of the gas and T its absolute temperature.

By looking at the two descriptions of the law, we see immediately that the property that they have in common is

A) involves changes in temperature

Since the temperature is NOT kept constant in the two laws.

7 0
3 years ago
D5W is a solution used as an intervenous fluid.It is 5.0% by mass solution of the dextrose (C6H12O6) in water. if the density of
Alona [7]

Answer:

0.29 mol/L

Explanation:

Its density is 1.029 g/ml so in a liter (1000 mL) there is 1029 g of solution, but only 5% is dextrose.

0.05x1029=51.45

So in a liter of D5W solution there is 51.45 g of dextrose.

Dextrose molar mass iss 180.156 g/mol, so in 51.45 g of dextrose there is

51.45/180.156=0.29 mol

In one liter of solution there is 0.29 mol of dextrose, so the molarity of such solution is 0.29 mol/L.

6 0
3 years ago
use the reaction that occours when magnesium burns in oxygen to show how a reaction might be included in more than one category
Schach [20]
2Mg+O₂⇒2MgO
It can be a combustion reaction, or it can be a combination reaction
5 0
3 years ago
What is the chemical name for Se8O7​
irina1246 [14]

Answer:

Selenium oxide

Explanation:

3 0
3 years ago
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