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3 years ago

There are 4.184___ in a Joule of energy

Chemistry

1 answer:

Alinara [238K]3 years ago

4 0

Answer: calories?

Explanation: but isn’t it 1 calorie = 4.184 joules of energy

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To determine the concentration of chloride ion (Cl-) in a 100 mL sample of ground water, a chemist adds a large enough volume of

Orlov [11]

Answer:

$[Cl^-]=232.3\frac{mgCl^-}{L}$

Explanation:

Hello,

In this case, we can represent the chemical reaction as:

$Cl^-(aq)+AgNO_3(aq)\rightarrow AgCl(s)+NO_3^-(aq)$

In such a way, since the mass of the obtained silver chloride is 93.9 mg, we can compute the chloride ions in the ground water by using the following stoichiometric procedure whereas the molar mass of chloride ions and silver chloride are 35.45 g/mol and 143.32 g/mol respectively:

$m_{Cl^-}=93.3mgAgCl*\frac{1mmolAgCl}{143.32mgAgCl}*\frac{1mmolCl^-}{1mmolAgCl} *\frac{35.45mgCl^-}{1mmolCl^-} =23.23mgCl^-$

Finally, for the given volume of water in liters (0.100L), we compute the required concentration:

$[Cl^-]=\frac{23.2mgCl^-}{0.100L}\\$

$[Cl^-]=232.3\frac{mgCl^-}{L}$

Best regards.

5 0

4 years ago

Predict the formula of the ionic compound that would result from combining the monatomic ions formed by each pair of elements. M

skad [1K]

Answer:

E - Be and O

A - Mg and N

E - Li and Br

F - Ba and Cl

B - Rb and O

Explanation:

Be and O

Be is a metal that loses 2 e⁻ to form Be²⁺ and O is a nonmetal that gains 2 e⁻ to form O²⁻. For the ionic compound to be neutral, it must have the form BeO (E-MX).

Mg and N

Mg is a metal that loses 2 e⁻ to form Mg²⁺ and N is a nonmetal that gains 3 e⁻ to form O³⁻. For the ionic compound to be neutral, it must have the form Mg₃N₂ (A-M₃X₂).

Li and Br

Li is a metal that loses 1 e⁻ to form Li⁺ and Br is a nonmetal that gains 1 e⁻ to form Br⁻. For the ionic compound to be neutral, it must have the form LiBr (E-MX).

Ba and Cl

Ba is a metal that loses 2 e⁻ to form Ba²⁺ and Cl is a nonmetal that gains 1 e⁻ to form Cl⁻. For the ionic compound to be neutral, it must have the form BaCl₂ (F-MX₂).

Rb and O

Rb is a metal that loses 1 e⁻ to form Rb⁺ and O is a nonmetal that gains 2 e⁻ to form O²⁻. For the ionic compound to be neutral, it must have the form Rb₂O (B-M₂X).

4 0

3 years ago

HELP ASAP PLEASE!!!!

IRISSAK [1]

50 electron capacity

3 0

4 years ago

Read 2 more answers

Write a chemical equation for KOH(aq) showing how it is an acid or a base according to the Arrhenius definition.

Sati [7]

Answer:

Write a chemical equation for KOH(aq) showing how it is an acid or a base according to the Arrhenius definition.