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3 years ago

Is opposite poles repel each other why does the north end pf a compass point to the north pole

1 answer:

3 0

The phrase goes Opposites Attract, Likes Repel so when the north end of your compass points north it is because the south end is attracted to the south side of a larger magnet (the earth´s magnet)

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Gaseous ethane, C2H6, burns in the presence of oxygen

Gnesinka [82]

Moles of Carbon dioxide(CO2) = 2

<h3>Further explanation</h3>

Given

Reaction

2 C2H6 (g) + 7 O2 (g) —+ 4CO2 (g) + 6 H20 (g)

Required

moles of carbon dioxide

Solution

The reaction coefficient shows the mole ratio of the compounds in the reaction equation (reactants and products)

From the equation, mol ratio of C2H6 : CO2 = 2 : 4, so mol CO2 :

mol CO2 = (4/2) x mol C2H6

mol CO2 = 2 x 1

mol CO2 = 2

3 0

3 years ago

Identify the term that matches each definition.

Katen [24]

Answer:

Explanation:

The front vent of a fume hood that assists and maintain proper air circulation is Airfoil

The horizontal flat surface area of the fume hood where experiments are being carried out is Work Surface.

The main characteristics which demonstrate and describes how substances evaporate rapidly and readily into the thin air while producing a huge amount of vapor is known as Volatile

In front of the fume hood, lies the glass panel whose main purpose is to shield the user from the hazardous substance. This glass panel is known as the Sash.

6 0

3 years ago

If an endothermic reaction begins at 26 degrees celsius and decreases by 2 degrees Celsius per minute, how long would it take to

Natalija [7]

Answer:

It would take 13 minutes.

Explanation:

The temperature decreases at a linear rate, meaning that we can describe the process by using the following formula:

T₂ = T₀ - 2*t

Where T₂ is the final temperature, T₀ is the initial temperature; and t is the elapsed time in minutes.

We input the data given by the problem:

0 °C = 26 °C - 2°C/min * t

And solve for t:

t = 13 min

8 0

3 years ago

What is a solution?

grandymaker [24]

Answer:

A mixture of two or more substances that are evenly mixed throughout.

Explanation:

This is because a solution shouldn't be chemically bonded, that's called a compound.

6 0

3 years ago

When calcium metal (Ca) reacts with oxygen gas (O2), it produces the ionic compound calcium oxide (CaO). Write the balanced equa

jonny [76]

Oxidation-Reduction Reactions Suggested Reading Thus the oxidation number for oxygen in calcium oxide is -2. ... In effect, each calcium atom loses two electrons to form Ca2+ ions, and each O atom in O2 gains two electrons to form O2- ions. The net result is a transfer of electrons from calcium to oxygen, so this reaction is an oxidation-reduction reaction.

+O²(g)=2CaO(s)

Explanation:

we can conclude that in the reaction there is both reduction and oxidation.

6 0

3 years ago