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Alecsey [184]
3 years ago
7

Predict the crystal ionic radius for antimony, Sb, observing the trend in values for the crystal ionic radii of the other elemen

ts belonging to the same group. p .340, As .580, Sb
Chemistry
1 answer:
elena55 [62]3 years ago
6 0

Explanation:

We know that Ionic radius increases on going downwards in any group. In group 15, the last elements Sb and Bi have ionic radii lesser than the rest of its elements i.e N,P and As.  

This is due to the fact that  Sb and Bi have completely filled d and f sub-shells which have least shielding effect.  

Thus,  they do not guard the valence electrons to a greater extent due to which the valence electrons feel almost whole nuclear charge.  

This, results into attraction of valence electrons towards nucleus and hence size decreases.  

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Why is soil conversation important
Vinvika [58]

Answer:

Soil conservation is important because soil is crucial for many aspects of human life as it provides food, filters air and water and helps to decompose biological waste into nutrients for new plant life. Soil can be drained away or contaminated, destroying it for use. Soil conversation involves working to reduce contamination and depletion.

Explanation:

hope this helps, pls mark brainliest :D

4 0
3 years ago
Consider an endothermic reaction C(s) CO2(g)2CO(g) If such a system at equilibrium is heated and compressed at the same time, wh
RSB [31]

Answer:

A. It will shift to the left

Explanation:

In the equilibrium:

C(s) ⇄ CO2(g)2CO(g)

The system will shift to the right if any change stimulate the production of gas -LeChatelier's principle-; in the same way, if a change doesn't favors the production of gas the system will shift to the left producing less gas.

The changes that increasing the pressure of the system, doesn't favors the gas production doing the system shift to the left.

A gas that is heated expands itsellf doing the pressure increases.

In the same way, if you compress the gas, the gas increases its pressure.

Thus, both changes increase pressure of the gas doing the system shift to the left.

<h3>A. It will shift to the left </h3>

6 0
4 years ago
Which type of change occurs when electrons form a bond between two atoms?
Nataly [62]
B is the answer. hope this helps
8 0
4 years ago
How large is the observable universe
Norma-Jean [14]
Here goes the question with no exact answer, lol <3


Scientists tell us that the observable universe is about 90 light years but then I wonder how they calculated that because the universe is immense!

I'm sorry but I can't go deeper into explaining as that's a tough question.
7 0
3 years ago
The wall of an industrial furnace is constructed from 0.15-m-thick, fireclay brick having a thermal conductivity of LZ W/m.K. Me
aliya0001 [1]

Answer:

The rate of heat loss through the wall is 1700 watts.

Explanation:

The complete statement of the problem is:

<em>The wall of an industrial furnace is constructed from 0.15-m-thick, fireclay brick having a thermal conductivity of 1.7 W/m·K. Measurements made during steady state operation reveal temperatures of 1400 and 1150 K at the inner and outer sur- faces, respectively. What is the rate of heat loss through a wall that is 0.5 m by 1.2 m on a side?</em>

Given that wall of the industrial furnace is under steady conditions of heat transfer and whose configuration is a flat element, we use the equation of conductive heat transfer rate (\dot Q), measured in watts:

\dot Q = \frac{k\cdot w\cdot h}{l}\cdot (T_{i}-T_{o})

Where:

k - Thermal conductivity, measured in watts per meter-Kelvin.

w - Width of the wall, measured in meters.

h - Height of the wall, measured in meters.

l - Thickness of the wall, measured in meters.

T_{i} - Inner surface temperature, measured in Kelvin.

T_{o} - Outer surface temperature, measured in Kelvin.

If we know that k = 1.7 \,\frac{W}{m\cdot K}, w = 1.2\,m, h = 0.5\,m, l = 0.15\,m, T_{i} = 1400\,K and T_{o} = 1150\,K, the steady state heat transfer is:

\dot Q = \left[\frac{\left(1.7\,\frac{W}{m\cdot K} \right)\cdot (1.2\,m)\cdot (0.5\,m)}{0.15\,m} \right]\cdot (1400\,K-1150\,K)

\dot Q = 1700\,W

The rate of heat loss through the wall is 1700 watts.

3 0
3 years ago
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