Which expression is equivalent to 6m + (m

Which properties make a metal a good material to use for electrical wires? malleability and reactivity conductivity and ductilit

Schach [20]

The metal properties that make up electrical wires are conductivity and ductility. Conductivity is important for free electrons to flow, hence electricity. Ductility is as well integral for strips to be formed, but with ample strength that does not break the material.

3 0

2 years ago

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In which of the following cases does the reaction go to farthest to completion ?

Mashcka [7]

Answer:

$k=10^{3}$

Explanation:

k stand for equilibrium constants in terms of reaction

The higher the value of an equilibrium constant the faster the equilibrium reaction comes to completion.

Consider the example below:

$R_{1}\ + R_{2}$ ⇄ $P_{1}\ + P_{2}$

where

$The\ equilibrium\ constant\ K = \frac{P_{1}P_{2}}{R_{1}R_{2}}$

For a faster reaction the numerator i.e. the right hand side of the equation have to be higher than the left hand side (the denominator). therefore the higher the numerator, the higher the value of the equilibrium constant and the faster the reaction get to completion thus option c is correct.

5 0

2 years ago

What is the product if an atom of Po-209<br> undergoes alpha decay?

g100num [7]

<h3>Answer:</h3>

Lead-205 (Pb-205)

<h3>Explanation:</h3>

<u>We are given;</u>

An atom of Po-209

We are supposed to identify its product after an alpha decay;

Polonium-209 has a mass number of 209 and an atomic number of 84.
When an element undergoes an alpha decay, the mass number decreases by 4 while the atomic number decreases by 2.
Therefore, when Po-209 undergoes alpha decay it results to the formation of a product with a mass number of 205 and atomic number of 82.
The product from this decay is Pb-205, because Pb-205 has a mass number of 205 and atomic number 82.

The equation for the decay is;

²⁰⁹₈₄Po → ²⁰⁵₈₂Pb + ⁴₂He

Note; An alpha particle is represented by a helium nucleus, ⁴₂He.

7 0

3 years ago

Can someone help please? :)

Leno4ka [110]

1) This is a definition.

2) Protons are given by the bottom number (since atomic number = number of protons).

3) Neutrons = (mass number)-(atomic number), which are the top and bottom numbers, respectively.

4) Nuclear fusion involves combining two things together, which is only reflected by the last option.

5) This is a fact.

6) This is a fact.

7) This is a fact.

8) This is a fact.

9) The correct option is the explanation.

7 0

1 year ago

Consider the change given below. At constant pressure, is work done by the system on the surroundings? By the surroundings on th

alexira [117]

Answer : At constant pressure work is done by the system on the surroundings.

Explanation :

Work done : Any quantity that flows across the boundary of a system during a change in its state and it completely convertible into the lifting of a weight in the surroundings.

Formula for work done is:

$w=-p_{ext}dV$

Sign convention :

When volume expand then system work that means work done by the system.

w = (-ve)

When volume compress then surrounding work that means work done on the system.

w = (+ve)

The given reaction is:

$Hg(l)\rightarrow Hg(g)$

This is a evaporation process in which phase changes from liquid state to gaseous state at constant temperature.

At constant pressure, work depends only on volume.

In evaporation process, the volume expand that means work is done by the system on the surroundings.

Sign convention is, w = (-ve)

Thus, at constant pressure work is done by the system on the surroundings.

7 0

3 years ago

Which expression is equivalent to 6m + (m - 2)(m + 7) + 3?