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Rufina [12.5K]
3 years ago
7

Which of the following pairs of elements are likely to form ionic compounds? Check all that apply. Check all that apply. magnesi

um and chlorine sodium and potassium nitrogen and iodine chlorine and bromine helium and oxygen potassium and sulfur
Chemistry
1 answer:
Roman55 [17]3 years ago
8 0

Answer:

magnesium and chlorine

Explanation:

An ionic bond is usually formed between a metal and a nonmetal. An ionic bond involves the transfer of one or more electrons from a highly electro positive metal to a nonmeta.

Usually, the electro negativity difference between the two species involved in an ionic bond is usually high.

For instance, the electro negativity of magnesium is 1.31 while that of chlorine is 3.16. This implies that they have a difference in electro negativity of about 1.85 between them which is large enough to be considered as leading to a pure ionic bond. An electro negativity difference above 1.7 is generally regarded as leading to the formation of an ionic bond.

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The answer to this would be d. Precipitation patterns .
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the radius of the Sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. Express
Mazyrski [523]

Explanation;

Writing scientific notation :

  • Move the decimal to the left side until single digit of number remains before the decimal.
  • Then we will count the number of times we moved the decimal. Write this number as the exponential power of number '10'.
  • For Example: 2894.55=2.89455\times 10^{3}

Radius of the sun = 696,000.0 kilometer

1 km=10^3 m

Radius of the sun can also be written as = 6.96\times 10^{5} km=6.96\times 10^{5}\times 10^3 m=6.96\times 10^{8} meter

Size of bacterial cell = 1.9\times 10^{-4} millimeter

1 mm=1\times 10^{-3} m

Size of bacterial cell can also be written as = 1.9\times 10^{-4}\times 10^{-3} m=1.9\times 10^{-7} meter

4 0
3 years ago
Im hvaing a hard time getting the right answer
Tanya [424]

Answer:

V=23.9mL

Explanation:

Hello!

In this case for the solution you are given, we first use the mass to compute the moles of CuNO3:

n=2.49g*\frac{1mol}{125.55 g}=0.0198mol

Next, knowing that the molarity has units of moles over liters, we can solve for volume as follows:

M=\frac{n}{V}\\\\V=\frac{n}{M}

By plugging in the moles and molarity, we obtain:

V=\frac{0.0198mol}{0.830mol/L}=0.0239L

Which in mL is:

V=0.0239L*\frac{1000mL}{1L}\\\\V=23.9mL

Best regards!

6 0
3 years ago
N the ionic compound aluminum selenide, each atom of aluminum (gains or loses)
Volgvan

Answer:

loses, gains

Explanation:

In the ionic compound aluminum selenide, each atom of aluminum will lose electrons while each atom of selenium will gain the electrons.

An ionic compound is an interatomic bond formed between a metal and non-metal. The metal is less electronegative compared to the non-metal. In this case, the metal will lose electrons to become positively charged whereas the non-metal, selenium will gain the electron to become negatively charged.

The electrostatic attraction between these oppositely charged ions leads to the formation of the ionic bond.

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How do mass and type of material affect thermal energy transfer?
Lerok [7]

Answer:

Temperature, mass, and the type of material are factors that affect the thermal energy of an object.

Material with the higher specific heat will have more thermal energy than material with lower specific heat if they both have the same mass and temperature.

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