Develop a procedure that involves 5 different tries to determine the amount of the active ingredient green

How many moles are in 2.0 grams of Na?

lisov135 [29]

Answer:

46

Explanation:

Sodium metal has a molar mass of

22.99

3 0

3 years ago

Write electron configurations for Gallium, Ga (Z=31), and show the total valence electrons

ivann1987 [24]

Answer: The electronic configuration of gallium is written below and number of valence electrons is 3.

Explanation:

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

Number of electrons in an atom is determined by the atomic number of that atom.

Valence electrons are defined as the electrons present in the outermost shell of an atom.

We are given:

An element Gallium having atomic number as 31.

Number of electrons = 31

Electronic configuration of Gallium is: $(Z=31):1s^22s^22p^63s^23p^64s^23d^{10}4p^1$

This element has 3 electrons in its outermost shell. So, the number of valence electrons is 3

Hence, the electronic configuration of gallium is written below and number of valence electrons is 3.

3 0

3 years ago

Sulfur and oxygen form both sulfur dioxide and sulfur trioxide. When samples of these are decomposed, the sulfur dioxide produce

Diano4ka-milaya [45]

To determine the mass of oxygen per gram of sulfur for sulfur dioxide, we simply obtain the ratio of the mass of oxygen and the mass of sulfur produced from the decomposition of sulfur dioxide. All other values given in the problem statement above are just to confuse us that the question is a difficult one. We do as follows:

mass of oxygen per gram sulfur = 3.45 g / 3.46 g
mass of oxygen per gram sulfur = 0.9971 g O2 / g S

4 0

2 years ago

Eeeeeeeeeeeeeeeeeeeeeeeeeee

Varvara68 [4.7K]

Answer:

dolo HAHAHAAHAHHAHAHAHA

6 0

2 years ago

Develop a model to show the chemical potential energy of wood and how that energy is transformed.

Phantasy [73]

Answer:

Explanation:

Chemical potential energy is the chemical energy stored (or property) of a substance. One chemical potential energy of wood is combustion. Combustion involves the burning of a substance in excess oxygen (in this case open air). The chemical energy stored here is transformed to thermal/heat energy after combustion due to the large amount of heat evolved/produced.

NOTE:

The model above also that combustion is an exothermic reaction because it involves the release of heat into it's surrounding.

6 0

3 years ago