Chemistry College

During a chemical reaction, heat is absorbed. What kind of reaction occurred?
A)
An endothermic reaction
B)
An exothermic reaction

Answers

Answer 1

Answer:

b

Explanation:

Answer 2
Answer: b explanation:

Related Questions

What type of reaction is FeS + 2HCl àFeCl2 + H2S?

Answers

Answer: 3 4 a noodles

Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]

After burning your candle for a few hours you and your friend notice that it's mass has decreased. Your friend claims that the mass "disappeared". Why do you know he is wrong (Hint: it's a Scientific Law)? What actually happened to the mass? What form is that mass in now? What is this process called?

Answers

Answer:

The law of conversion of mass is a scientific law that says that mass or matter can not be created or destroyed like energy but changes its form in a different type of state. So, by the law of conversion of mass, you can say that mass is not disappeared but change in different forms of states of matter like gas, soot, or melted residues of candle and ash of thread.

Due to this, the mass of the solid or waxy state due to burning changes to gas released by burning and residue of wax that will be equal to the mass of the original mass.

The elements fluorine (F), chlorine (Cl), and iodine (I) are all part of the same _________on the periodic table.

Answers

Explanation:

The elements Fluorine (F),Chlorine (Cl) and Iodine (I) are all part of the same Group ( i.e, Group 17 ) on the periodic table.

Answer:

Group

Explanation:

Which of the following situations would cause light to refract?

Answers

When light travels from air into water, it slows down, causing it to change direction slightly

When light passes from one medium to the other of different density, the light ray will bend. This is called refraction. Light moving from air to water cause refraction. Hence, option d is correct.

What is refraction ?

Refraction is a phenomenon in which a light ray bent in its direction when passing from one medium to the other where the mediums have different densities.

The measure of bending of light in a medium is called refractive index of that medium. It depends on the density as well as velocity of light through the medium.

For example, when light passes from air to water or air to glass it bends. We can clearly observe the bending in the light ray at the boundary of the two mediums. Hence, option D is correct.

Find more on refraction:

https://brainly.com/question/29692290

#SPJ6.

The options of your question were as follows:

A.  traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water.

What is the nuclear charge of an atom of Silver?
A) +79
B) +47
C) +108
D) +61

Answers

Answer:

47 is your correct ans, which is b

What is bonding all about in chemistry?

Answers

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.

Answer:

It is like about a attraction between atoms, molecules, and more.

54:63 ratio simplest form?

Answers

Answer:

The fraction is 6/7

Explanation:

6/7 is the simplified fraction for 54/63 by using the GCD or HCF method. Thus, 6/7 is the simplified fraction for 54/63 by using the prime factorization method.

Hope this helps!!!

Can I have Brainliest???

The ____ are new substances that are created following a chemical reaction. *
A:chemical reactions
B:products
C:reactants
D:coefficients

Answers

Answer:

b

Explanation:

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