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Anna [14]
3 years ago
13

Please Help!!

Chemistry
2 answers:
Varvara68 [4.7K]3 years ago
8 0
The answer is to this question , D
Vsevolod [243]3 years ago
5 0
D, and the system combine to form organism
a system is the breathing one for example
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if you take 2.0mL of a 7.0 ppm NaOH solution and dilute it to 250.0mL, calculate the final concentration in ppm.
Oduvanchick [21]

Answer:

C₂ = 0.056 ppm

Explanation:

Given data:

Initial volume = 2.0 mL

Initial concentration = 7.0 ppm

Final volume = 250.0 mL

Final concentration = ?

Solution:

Formula:

C₁V₁ = C₂V₂

C₁ = Initial concentration

V₁ = Initial volume

C₂ = Final concentration

V₂ = Final volume

Now we will put the values in formula.

C₁V₁ = C₂V₂

7.0 ppm × 2.0 mL = C₂ × 250.0 mL

C₂ = 14.0 ppm.mL /250.0 mL

C₂ = 0.056 ppm

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The answer to the problem is
69.55
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Is black coffee slightly acidic
tatiyna
Answer:  "Yes".
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The negative ion found in bases is the
WARRIOR [948]

Answer:

a)hydroxide or you can say hydroxil ion OH-

6 0
4 years ago
Complete the following equation: 250/96Cm ——-> ? + 4 1/0n
vfiekz [6]

Answer:

²⁵⁰₉₆Cm → ²⁴⁶₉₆Cm + 4 ¹₀n

Explanation:

The complete equation is;

²⁵⁰₉₆Cm → ²⁴⁶₉₆Cm + 4 ¹₀n

  • The above equation is an example of a nuclear reaction in which unstable atom of Cm emits neutrons to become more stable.
  • Radioactive isotopes undergo radioactivity or decay to attain stability, they do so by emitting particles such as alpha, beta particles or a neutron.
  • An atom of Cm-250 undergoes decay and emits four neutrons to form an atom of Cm-246.
3 0
3 years ago
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