How many grams of sodium sulfide can be produced when 45.3 g Na react with 105 g S? Unbalanced equation: Na + S → Na2S
Show, or explain, all of your work along with the final answer.
Answers
2Na + S → Na2S
We are given the amount of the reactants to be used in the reaction. We use these to calculate the amount of product. We do as follows:
45.3 g Na ( 1 mol / 22.99 g ) = 1.97 mol Na
105 g S ( 1 mol / 32.06 g ) = 3.28 mol S
The limiting reactant would be Na. We calculate as follows:
1.97 mol Na ( 1 mol Na2S / 2 mol Na ) (78.04 g / mol ) = 76.87 g Na2S produced
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Gravity is an example of what
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Element’s oxidation number decrease that because that element has received electrons from another element
Explanation:
a reduction in oxidation state is known as a reduction. Such reactions include the formal removal of electrons: a net gain in electrons moving a reduction, and a clear loss of electrons being an oxidation.
An oxidation-reduction (redox) reaction is a type of synthetic reaction that involves a transfer of particles between two species. An oxidation-reduction reaction is any synthetic reaction in which the oxidation number of a molecule, atom, or ion quarters by winning or missing an electron.
hope that helps
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Answer:
The correct option is: D.act as a Lewis base in water.
Explanation:
Ammonia is a hydride of nitrogen with the chemical formula NH₃. It is a colorless gas with a characteristic pungent smell. According to the VSEPR theory, it has a trigonal pyramidal structure.
In water, ammonia acts as a Lewis base due to the presence of lone pair on the nitrogen atom. Lewis bases are electron pair or lone pair donors.
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Answer:
Geologists agree that Devils Tower began as magma, or molten rock buried beneath the Earth’s surface. What they cannot agree upon are the processes by which the magma cooled to form the Tower, or its relationship to the surrounding geology of the area. Numerous theories have been suggested to explain how Devils Tower formed. Geologists Carpenter and Russell studied Devils Tower in the late 1800s and concluded that the Tower was formed by an igneous intrusion (the forcible entry of magma through other rock layers). Later geologists searched for more detailed explanations.
The simplest explanation is that Devils Tower is a stock—a small intrusive body formed by magma which cooled underground and was later exposed by erosion (Figure 1). In 1907, scientists Darton and O’Hara decided that Devils Tower must be an eroded remnant of a laccolith. A laccolith is a large, mushroom-shaped mass of igneous rock which intrudes between the layers of sedimentary rocks but does not reach the surface. This produces a rounded bulge in the sedimentary layers above the intrusion (Figure 2). This idea was quite popular in the early 1900s when numerous studies were done on a number of laccoliths in the American southwest.
Other ideas have suggested that Devils Tower is a volcanic plug or that it is the neck of an extinct volcano (Figure 3). The limited evidence of volcanic activity (volcanic ash, lava fows, or volcanic debris) in the area creates doubt that the Tower was part of a volcanic system. It is possible that this material may simply have eroded away. In 2015, geologist Prokop Závada and his colleagues proposed their own hypothesis for the formation of the Tower. They compared it to a similar butte formation in the Czech Republic. Their hypothesis suggests that the Tower is the result of a maar-diatreme volcano (Figure 4). These form when magma encounters groundwater beneath the Earth’s surface. The super-heated water becomes steam. This steam expands explosively creating a crater on the surface. The crater fills with lava which cools and solidifes into a dome structure. Erosion wears away portions of the dome to create the Tower as we see it today.
The concept of erosion exposing the Tower is common to all of its modern formation theories. Ironically, the erosion which exposed the Tower also erased the evidence needed to determine which theory of Devils Tower’s formation is the correct one.
Explanation:
(2) an acid (4) a salt
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Answer : The correct option is, (2) an acid
Explanation:
As we know that when a substance (acid) that dissolves in water, it produces hydronium ion as a positive ion and conjugate base as a negative ion.
For example :
When (acid) dissolves in water, it produces hydronium ion as a positive ion and conjugate base as a negative ion.
The balanced reaction will be,
Therefore, the substance is, (2) an acid
It's caused by an Arrhenius acid mixing with water to form Hydronium and Hydroxide ions
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Explanation:
Since factory is at low elevation, therefore, there will be more pressure. Similarly at high elevations there will be low pressure.
So, when bags of popcorn move from low elevation to high elevation the factory manager need to monitor the amount of air in each bag because if there are too many molecules in the bag then it will pop as it goes from high to low pressure areas.
A factory at a low elevation ships bags of popcorn to cities at high elevations. The factory manager need to monitor the amount of air in each bag because when the bags of popcorn are delivered into high elevation cities, it will shrink due to the high pressure exerted by the surroundings towards the bag. As the elevation increases, the pressure surrounding it also increases.