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3 years ago

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Which of the following is an example of a metallic bond? A. Chlorine accepts 1 electron from calcium to form a stable bond. B. S

odium gives 1 electron to chlorine to form a stable bond. C. Silver ions are surrounded by a large group of valence electrons.

1 answer:

Law Incorporation [45]3 years ago

7 0

Metallic bonds exist between the atoms of metal elements and their electrons, therefore, the answer is C.

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The density of a certain type of steel is 8.1 g/cm3. What is the mass of a 124 cm3 chunk of this steel? Show

posledela

Mass of the steel is $1004.4 g$

density of a substance can be regarded as the ratio of the mass of that substance to that of it's volume.

Mass of substance can be regarded as the quantitative measure of inertia, it can be simply explained as a fundamental property of all matter

<em> We can express this mathematically as ;</em>

$Density= \frac{ mass }{volume }$

Given :

Density of this steel= 8.1g/cm3

$Mass= 124 cm^{3}$

If we make Mass subject of formula,

$Mass= ( density *volume)$

Then let us substitute the values into the expression

$Mass= (124*8.1)$

$= 1004.4 g$

Therefore, mass of the steel is $1004.4 g$

Learn more at: brainly.com/question/9196460?referrer=searchResults

8 0

3 years ago

Someone pls pls pls help me with this question.

Arisa [49]

$\rm{\pink{\underline{\underline{\blue{REASON:-}}}}}$

⭐ Elements in which the last electron enters any one of the five d-oribitals of their respective penultimate shells are called as <u>d-block</u><u> </u><u>elem</u><u>ents</u> .

⭐ But the last electron of Zn , Cd , Hg and Cn enters in the s-oribital of their respective ultimate shells rather than the d-oribitals of their respective penultimate shells . Therefore, these elements cannot be regarded as d-block elements .

☃️ But properties of these elements resemble to the d-block elements rather than s-block elements .

☃️ Therefore, to make the study of periodic classification of elements more rational, they are studied along with d-block elements .

✍️ Thus <u>on the basis of properties</u> all transition elements are d- block elements, but <u>on the basis of electronic configuration</u> all d -block elements are not transition elements .

3 0

3 years ago

For the reaction 2NH3(g) + 2O2(g)N2O(g) + 3H2O(l) H° = -683.1 kJ and S° = -365.6 J/K The standard free energy change for the rea

BlackZzzverrR [31]

Answer:

$\Delta G^{0}$ = -457.9 kJ and reaction is product favored.

Explanation:

The given reaction is associated with 2 moles of $NH_{3}$

Standard free energy change of the reaction ( $\Delta G^{0}$ ) is given as:

$\Delta G^{0}=\Delta H^{0}-T\Delta S^{0}$ , where T represents temperature in kelvin scale

So, $\Delta G^{0}=(-683.1\times 10^{3})J-(273K\times -365.6J/K)=-583291.2J$

So, for the reaction of 1.57 moles of $NH_{3}$ , $\Delta G^{0}=(\frac{1.57}{2})\times -583291.2J=-457883.592J=-457.9kJ$

As, $\Delta G^{0}$ is negative therefore reaction is product favored under standard condition.

6 0

3 years ago

(Digestion, Intestine, Bile)is secreted by the liver to help in the breaking down of food particles.

Yuri [45]

Answer:

Bile

Explanation:

Bile is secreted by the liver to help in the breaking down of food particles.

5 0

1 year ago

What volume (in milliliters) of oxygen gas is required to react with 4.03 g of Mg at STP

Dvinal [7]

Vol.250 before its to much pressure

7 0

3 years ago

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