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Answer:

It can create a new plant variety, cure diseases or like the current epidemic situation, vaccines, drugs, ...

Explanation:

Answer:

Mixture is combination of two or more substances

Explanation:

The sugar would dissolve in water. You could then pour off the solution and wash the remaining sand with a bit more water. Heat the water to evaporate it from the sugar, and the two are separated.

Answer:

Explanation:

1000

For exothermic processes, spontaneity will only occur if the entropy positive with all temperature or if the entropy is negative with only low temperature.

Since the given equation decomposed from 2 moles of gas into 3 moles of gas, we know that entropy is positive. Thus the reaction will be spontaneous at all temperature.

D is the answer

burning is irreversible change so its chemical change

Answer:

A

Explanation:carboxyli

Answer:

No more than 0.1 mL of hydrochloricton acid

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Answer:

Yes it is true

Explanation:

vinyl chloride is prepared by c2h2+hcl. Since vinyl chloride is formed after ETHYNE IS MIXED WITH CHLORIDE.

Answer:

It is a reversible esterification reaction.

Explanation:

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Answer:

Elements are pure substances which are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions. ... Some of the examples of elements are Iron, Copper, Gold, etc. A few examples of compounds are NaOH, NaCl, etc.

Answer:

Hydrogen (H) 1s1

Helium (He) 1s2

Lithium (Li) 1s2 2s1

Beryllium (Be) 1s2 2s2

Boron (B) 1s2 2s2 2p1

Carbon (C) 1s2 2s2 2p2

Nitrogen (N) 1s2 2s2 2p3

Oxygen (O) 1s2 2s2 2p4

Fluorine (F) 1s2 2s2 2p5

Neon (Ne) 1s2 2s2 2p6

Sodium (Na) 1s2 2s2 2p6 3s1

Magnesium (Mg) 1s2 2s2 2p6 3s2

Aluminum (Al) 1s2 2s2 2p6 3s2 3p1

Silicon (Si) 1s2 2s2 2p6 3s2 3p2

Phosphorus (P) 1s2 2s2 2p6 3s2 3p3

Sulfur (S) 1s2 2s2 2p6 3s2 3p4

Chlorine (Cl) 1s2 2s2 2p6 3s2 3p5

Argon (Ar) 1s2 2s2 2p6 3s2 3p6

Potassium (K) 1s2 2s2 2p6 3s2 3p6 4s1

Calcium (Ca) 1s2 2s2 2p6 3s2 3p6 4s2

Explanation:

Answer:

A pure substance composed of the same type of atom throughout. Compound: A substance made of two or more elements that are chemically combined in fixed amounts.

Answer:

There are 6.022x10^23 molecules

Answer:

A

Explanation:

Because it have more glucose

At 100.25 degree C temperature does water boil if 75.0 g of glucose (180.1 g/mol) is added to 400 g of water. Hence option A is correct.

Temperature is defined as the measuring a substance's degree of heat or cold. The direction of heat transfer when two bodies with different temperatures are kept in touch depends on the temperature. An instrument that measures temperature is a thermometer.

Glucose is defined as one of the carbohydrates classified as simple sugars. The brain is the most energy-hungry organ in the body and uses half of the body's sugar energy due to its abundance of nerve cells, or neurons. Thinking, memory, and learning are all tightly correlated with blood glucose levels and how effectively the brain uses this fuel.

Thus, at 100.25 degree C temperature does water boil if 75.0 g of glucose (180.1 g/mol) is added to 400 g of water. Hence option A is correct.

To learn more about temperature, refer to the link below:

https://brainly.com/question/11464844

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Answer:

Spherical smokeless powder is generally made from nitrocellulose as the base material. The nitrocellulose may be derived from purified cellulose, such as from cotton linters or wood, which is then nitrated by being treated with nitric and sulfuric acids (Olsen 1942. Smokeless powder.

Explanation:

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Because there are 4 P on the right side, we have to put a coefficient of 4 on the left to balance out the P.

This would give us 12 H on the left and 2 H on the right, so we have to put a 6 on the right to balance out the H.

Now we have 16 O on the left and 2 on the right, so a coefficient of 8 is required to balance out the O.

Explanation:

By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion. When an ion is formed, the number of protons does not change.

Answer:

Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions.

Explanation:

by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms. Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.

Answer:

a) Na2O

b) Ag2O

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Answer:

d cause it is

Explanation:

Answer:34.28 Degree celcius

Explanation:The heat given is equal to the change in temperature multiplied by the mass and the specific heat capacity

This gives the equation:Q=mc∆T

Where Q=184,m=7, specific heat capacity=4.184,∆T=X-28,

But ∆T=Final temperature (T'')-Initial temperature (T')

Therefore the equation becomes

184=7×4.184(X-28)

Solving the remaining linear equation gives you X as 34.28°C

Answer:

B. Mass

Explanation:

Matter is all the “stuff” that exists in the universe. It has both mass and volume. · Mass measures the amount of matter in a substance or an object.

hope i helped

Answer:

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Explanation:

Explanation:

Element X forms a chloride with the formula XCl 2 , which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as. (a) Na (b) Mg (c) Al (d) Si. the answer is Mg .