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3 years ago

the force of gravity will cause two different masses to

Chemistry

2 answers:

Anettt [7]3 years ago

7 0

The correct would be d

zepelin [54]3 years ago

4 0

Answer:

be attracted to one another

Explanation:

i took the k-12 test and this is the answer ;)

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Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each:

Sladkaya [172]

Answer:

Part A:

Charge is $P^{3-}$

Configuration is $1s^2 2s^22p^63s^23p^6$

Part B:

Charge is $Mg^{2+}$

Configuration is $1s^2 2s^22p^6$

Part C:

Charge is $Se^{2-}$

Configuration is $1s^2 2s^22p^63s^23p^64s^23d^{10}4p^6$

Explanation:

Monatomic ions:

These ions consist of only one atom. If they have more than one atom then they are poly atomic ions.

Examples of Mono Atomic ions: $Na^+, Cl^-, Ca^2^+$

Part A:

For P:

Phosphorous (P) has 15 electrons so it require 3 more electrons to stabilize itself.

Charge is $P^{3-}$

Full ground-state electron configuration of the mono atomic ion:

$1s^2 2s^22p^63s^23p^6$

Part B:

For Mg:

Magnesium (Mg) has 12 electrons so it requires 2 electrons to lose to achieve stable configuration.

Charge is $Mg^{2+}$

Full ground-state electron configuration of the mono atomic ion:

$1s^2 2s^22p^6$

Part C:

For Se:

Selenium (Se) has 34 electrons and requires two electrons to be stable.

Charge is $Se^{2-}$

Full ground-state electron configuration of the mono atomic ion:

$1s^2 2s^22p^63s^23p^64s^23d^{10}4p^6$

8 0

3 years ago

What is the best tool for making a decorative zucchini or celery twist

Dima020 [189]

Answer:

don't knoe sorry

Explanation:

6 0

3 years ago

Read 2 more answers

For the reaction CH4(g) + 2O2(g)CO2(g) + 2H2O(g) H° = -802 kJ and S° = -5.20 J/K At standard conditions, this reaction would be

Illusion [34]

Answer: at relatively low temperatures.

Explanation:

According to Gibbs equation;

$\Delta G=\Delta H-T\Delta S$

$\Delta G$ = Gibb's free energy change

$\Delta H$ = enthalpy change

T = temperature

$\Delta S$ = entropy change

A reaction is spontaneous when $\Delta G$ = Gibb's free energy change is negative.

Thus $\Delta G=(-\Delta H)-T(-\Delta S)$

$\Delta G=-(\Delta H)+T(\Delta S)$

Thus the reaction is spontaneous or $\Delta G$ is negative only when $T(\Delta S)$

Thus the reaction is spontaneous at relatively low temperatures

7 0

3 years ago

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI.

Kaylis [27]

If it is just a simple double-replacement reaction, then the balanced equation is simply:

Pb(ClO3)2(aq) + 2 NaI(aq) = PbI2 + 2 Na(ClO3)

However, if this is a precipitation reaction, we must identify which compound will precipitate (is insoluble), either NaClO3 or PbI2

NaClO3 is soluble, PbI2 is not. Only the lead cations and iodine anions will participate in the reaction.

thus, the balanced equation is: Pb^(2+) + 2I^(-) ==> PbI2

4 0

3 years ago

How would you prepare 250 mL of a 6.0M NaNO3 solution from a 15M NaNO3 solution?

makvit [3.9K]

This is pretty simple actually :) You are going to use the equation M1xV1=M2xV2
M stands for molarity and V is volume. Plug in the information you have, and then solve for the unknown using simple algebra. You get 6.0M NaNo3 x 250mL= 15M NaNO3 x V2. Now solve for V2. Keep in mind that you will have to use stoichiometry to convert to liters instead of liters if your answer requires it. Hope this helps! :)

7 0

3 years ago