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alexira [117]
3 years ago
13

Pleaseee I need help and it is urgent

Chemistry
1 answer:
ZanzabumX [31]3 years ago
6 0

Answer:

1)4180j

2)15000kj

Explanation:

1) E=100*(30-20)*4.18=4180j\\2)Q=.5*30*1000=15000kj

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the recommended adult dose of Elixophyllin ® , a drug used to treat asthma, is 6.00 mg/kg of body mass. Calculate the dose in mi
Paladinen [302]

Answer:

\boxed{\text{452 mg}}

Explanation:

(a) Convert pounds to kilograms.

\text{Mass} = \text{ 166 lb} \times \dfrac{\text{453.59 g}}{\text{1 lb}} \times\dfrac{\text{1 kg}}{\text{1000 g}} = \text{75.30 kg}

(b) Calculate the dose

\text{Dose} = \text{ 75.30 kg body mass} \times \dfrac{\text{6.00 mg Elixophyllin}}{\text{1 kg body mass}} = \textbf{452 mg Elixophyllin}\\\text{The dose of Elixophyllin for a 166 lb person is $\boxed{\textbf{452 mg}}$}

3 0
3 years ago
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Rom4ik [11]

Answer:

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Explanation:

The number of particles in one mole of a substance id=s given by the Avogadro's number which is approximately 6.023 × 10²³ particles

Therefore, we have;

One mole of Cl₂ gas, which is a compound, contains 6.023 × 10²³ individual molecules of Cl₂

3.491 × 10¹⁹ molecules of Cl₂ is equivalent to (3.491 × 10¹⁹)/(6.023 × 10²³) = 5.796 × 10⁻⁵ moles of Cl₂

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The mass of 5.796 × 10⁻⁵ moles of Cl₂ = 70.906 × 5.796 × 10^(-5) = 4.11 × 10⁻³ grams

Therefore;

The mass of 3.491 × 10¹⁹ molecules of Cl₂  of Cl₂ = 4.11 × 10⁻³ grams.

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Visible light spectrum is a part of electromagnetic waves.  The colors of the visible light spectrum are organised on the basis of their wavelength and frequency.

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strojnjashka [21]
Each element is made up of only one kind of atom.
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