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2 years ago

What is the name of this compound?

Chemistry

2 answers:

Mashcka [7]2 years ago

3 0

Answer:

B. ethylamine.

Explanation:

Since the compound contains NH₂, it is an amine compound.

The alkyl group C₂H₅- contains 2 C atoms (ethyl group).

So, the compound is ethylamine.

KonstantinChe [14]2 years ago

3 0

Answer:

B: ethylamine

Explanation:

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Which of the following best defines Avogadro's number? (5 points)

Likurg_2 [28]

Answer:

Avogadro's number is 6.022* 10^23

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2 years ago

Read 2 more answers

How many kilojoules of heat are needed to completely vaporize 42.8 grams of c4h10o at its boiling point given that c4h10o has a

Darina [25.2K]

Answer is: 15.30 kilojoules of heat are needed to completely vaporize C₄H₁₀.
m(C₄H₁₀) = 42.8 g.
M(C₄H₁₀) = 74.12 g/mol.
n(C₄H₁₀) = m(C₄H₁₀) ÷ M(C₄H₁₀).
n(C₄H₁₀) = 42.8 g ÷ 74.12 g/mol.
n(C₄H₁₀) = 0.577 mol.
Q = n(C₄H₁₀) · ΔHvap.
Q = 0.577 mol · 26.5 kJ/mol.
Q = 15.30 kJ, heat of butane.

6 0

2 years ago

Select the true statements about alpha particles. Alpha particles have a nuclear charge of +1. Alpha particle formation is accom

Otrada [13]

Answer : The correct statement is, Alpha particles have a mass number of 4.

Explanation:

Alpha particle : It is also known as alpha radiation or alpha ray that consists of 2 protons and 2 neutrons that are bound together into a particle that is identical to the helium nucleus. It is produced in the process of alpha decay.

Alpha decay : In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.

The general representation of alpha decay reaction is:

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\alpha$

Conversion of proton into neutron leads to releasing in positron.

Positron emission : It is defined as the emission process in which positron particle is emitted. In this process, a proton gets converted to neutron and an electron neutrino particle.

$_Z^A\textrm{X}\rightarrow _{Z-1}^A\textrm{Y}+_{+1}^0e$

Conversion of neutron into proton leads to release in electron or beta particle.

Beta minus decay : It is a type of decay process, in which a neutrons gets converted to proton, an electron and anti-neutrino. In this the atomic mass number remains same.

The beta minus decay equation is represented as,

$_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0e$

(A is the atomic mass number and Z is the atomic number)

From the given statements we conclude that, the statement alpha particles have a mass number of 4 is correct statement while the other statements are wrong of alpha particles.

Hence, the correct statement is, Alpha particles have a mass number of 4.

5 0

2 years ago

The heat equation, as given in the introduction, can also be rearranged to calculate the mass or temperature change for a substa

notka56 [123]

Answer:

The correct answer is 281.39 grams.

Explanation:

To arrive at this answer you must first keep in mind the basic equation:

Q = m*Cp* ΔT

Now, in order to calculate the necessary aluminum mass that absorbs 2138 J when passing from 14.83 to 23.31 ° C you must "clear" m of the previous equation.

This means, leave only the mass on one side of the equation, and "pass" Cp and ΔT to the other side dividing Q. This would look like this:

m= Q/ (Cp*ΔT)

Then, you need the value of specific heat of aluminum in the correct units, that is J / g ° C, the approximate value is 0.896.

ΔT is calculated by doing the mathematical operation:

23.31 °C - 14.83 °C = 8.48 °C

Finally, the values of: Q (data provided in joules), Cp (J / g ° C) and ΔT (calculated in ° C) are replaced in the last equation and the mass (in grams) is calculated resulting in 281.39 grams.

3 0

3 years ago

Now

crimeas [40]

Answer:

✔️Ionic bonds form between metal atoms and nonmetal atoms.

✔️The less electronegative atoms transfers one or more electrons to the more electronegative atom

✔️The metal atom forms a cation and the nonmetal atom forms an anion.

✔️The attraction between ions with an opposite charge forms an ionic bond.

Explanation:

Ionic bond refers to the bond formation which occurs when there is complete and permanent transfer of electrons from one metal atom to another non-metal atom. The metals, which are electropositive (less electronegative) loose their electrons while the non-metals, which are less electropositive (more electronegative) gain the electrons.

When the metal atom looses electrons, they form cations(become positively charged) while non-metal atom forms anions (become negatively charged). When the opposite charges attract each other, they form ionic bond.

3 0

2 years ago