Chemistry, 01.06.2021 16:50 reggienald3095

Using the balanced equation for the production of water from hydrogen and oxygen gases, calculate the mass (in grams) of water produced when 10.0 grams of oxygen reacts with excess hydrogen. (Hints: the molar mass of oxygen is 32 mol and
the molar mass of water is 18 g/mol)

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Answer from: Quest

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

If it releases 5 tons a day and there are 7 days a take that answer and multiply by 5 percent (0.05) to find the amount released in one week. leave a comment if you need more .

Answer from: Quest

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

$\begin{array}{ll}\qquad\textbf{chemical} & \qquad\textbf{nuclear} \\\text{energy changes $\approx 10^{2}$ kj} & \text{energy changes$\approx 10^{8}$ kj ($10^{6}$ times more}) \\\text{mass is conserved} & \text{mass changes to energy} \\\text{involves electrons} & \text{involves protons and neutrons} \\\text{atoms do not change} & \text{atoms transmute} \\\end{array}$

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Using the balanced equation for the production of water from hydrogen and oxygen gases, calculate th...