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Phantasy [73]
3 years ago
9

Which of the following is a monatomic anion? a) NH4+ b) Fr+ c) SO42– d) F-

Chemistry
2 answers:
Y_Kistochka [10]3 years ago
8 0
I think that it's d) F- but I'm not sure.
spin [16.1K]3 years ago
4 0

Answer:

d) F⁻

Explanation:

An anion is an ion that has a net negative charge. Ions such as OH⁻, NO₃⁻ or Cl⁻ are anions.

Monatomic means that it is made of only one atom. Mono=one. Ions such as H⁺, Na⁺ or S²⁻ are monoatomic, whereas ions such as OH⁻, NH₄⁺ or CN⁻ are <u>polyatomic</u>.

With this information in mind, the option that is both monatomic and an anion is d), F⁻.

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A 1 mol sample of gas has a temperature of 225K, a volume of 3.3L, and a pressure of 500 torr. What would the temperature be if
serg [7]
<h3>Answer:</h3>

78.75 K

<h3>Explanation:</h3>

<u>We are given;</u>

  • Initial pressure, P₁ = 500 torr
  • Initial temperature,T₁ = 225 K
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  • Final volume, V₂ = 2.75 L
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We are required to calculate the new temperature, T₂

  • To find the new temperature, T₂ we are going to use the combined gas law;
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P₁V₁/T₁ = P₂V₂/T₂

We can calculate the new temperature, T₂;

Rearranging the formula;

T₂ =(P₂V₂T₁) ÷ (P₁V₁)

  = (210 torr × 2.75 L × 225 K) ÷ (500 torr × 3.3 L)

  = 78.75 K

Therefore, the new volume of the sample is 78.75 K

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4 years ago
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Answer:

40 cm^3

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10.5 = 420 / x

x= 40

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