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blagie [28]
3 years ago
13

When a strontium atom loses two electrons to form an Sr2+ ion, the electrons are lost from the

Chemistry
1 answer:
kherson [118]3 years ago
6 0

Answer:When a strontium atom loses two electrons, it becomes a(n) cation with a charge of 2+. when any neutral atom loses an electron it becomes cation that is positively charged ions and an ion gets the charge according to the number of electrons loses.

you are very welcome but I may be inaccurate.

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The pressure of a gas is 100.0 kPa and its volume is 500.0 mL. If the volume increases to 1,000.0 mL, what is the new pressure o
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Answer:

P_2=50kPa

Explanation:

Hello,

In this case, we can apply the Boyle's law in order to understand the pressure-volume relationship as an inversely proportional relationship relating the initial and the final volume:

P_1V_1=P_2V_2

Next, we compute the final pressure P2:

P_2=\frac{P_1V_1}{V_2}=\frac{100.00kPa*500.0mL}{1000.0mL} \\\\P_2=50kPa

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3 years ago
Which of the following halogens has the weakest attraction for electrons?
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Answer:

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Explanation:

Among the halogens given in this problem, iodine has the lowest attraction for electrons.

This property is known as electronegativity.

Electronegativity is expressed as the relative tendency with which the atoms of the element attracts valence electrons in a chemical bond.

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Show your work and include answer with units.<br><br> How many atoms in 55 grams of magnesium
Georgia [21]

Answer:

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To get grams to atoms/molecules/particles we need to first convert grams > moles > atoms. This also applies in the other direction, where you have moles as that stepping stone.

Some key information we need:

Magnesium's molar mass= 24g/mol

Avogadro's Number= 6.022 x 10^{23} atoms

Where there is 1 mol per 6.022 x 10^{23}  atoms

*This maybe be something you want to memorize.

Grams to moles using molar mass , then to atoms using avogadro's number.

55g Mg x \frac{1 mol}{24g/mol} x \frac{6.022 x 10^{23} atoms }{1 mol} = 1.38 x 10^{24} atoms

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