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lutik1710 [3]
3 years ago
11

How does the law of conservation of mass apply to this reaction: C2H4+O2-->2H2O+2CO2?

Physics
2 answers:
ale4655 [162]3 years ago
5 0
Add a coefficient of 3 in front of the 02 to balance the 6 O atoms in the products
UkoKoshka [18]3 years ago
5 0

Answer: Option (b) is the correct answer.

Explanation:

According to the law of conservation of mass, mass of reactants will be equal to the mass of products in a chemical reaction.

For example, C_{2}H_{4} + O_{2} \rightarrow 2H_{2}O + 2CO_{2}

Here, mass of the reactants is (28.05 + 16) g/mol = 44.05 g/mol

Mass of the products is (2 \times 18 + 2 \times 44) g/mol = 36 + 88 = 124 g/mol

Therefore, mass of reactants is not equal to the mass of products. Since, there are equal number of hydrogen and carbon atoms on both the sides and only the oxygen atoms needs to be balanced.

Thus, we can conclude that for the given equation only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon.

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Can someone please put these vocab terms in the right boxes
umka2103 [35]

Conduction:

The handle of a pot becoming too hot to grab as it cooks on the stove.

Grabbing a warm coffee mug to warm your hands.

Putting an ice pack on an injury.

Burning yourself by touching boiling water.

Convection:

An oven that cooks by cycling warm air through the bottom and out the top.

Warm water rising to the surface of the ocean and cooler water sinking.

Cooking popcorn using a microwave.

Radiation:

Heat from a fire warming your hands.

Warm air rising off of the pavement.

Heat from the sun hitting a solar panel.

Hope this helps ☝️☝☝

7 0
4 years ago
Select the correct answer,
Tresset [83]

Answer:

I'm pretty sure it's air pressure.

Explanation:

4 0
3 years ago
Three 10-cm-long rods form an equilateral triangle. Two of the rods are charged to + 19 nC, the third to - 19 nC.What is the ele
Sveta_85 [38]
<span>We calculate the electric field as follows:
r = </span>√<span>(3)/6 x 19 cm = .05484 m 
The angle for the triangle would be 30 on each side.
tan(30) = r/(L/2) 

E' = kQ/{r*sqrt[(L/2)^2 + r^2]} = (8.99e9 x 15e-9) / {.05484 * sqrt[(.19/2)^2 + .003]}
</span>E' <span>= 22413 N/C
The value above is the electric field strength for a single rod at the center. 

|E'| = 22413 N/C 
E = 2|E'|sin(30) + |E'| = 49000 N/C</span>
5 0
3 years ago
Planets orbit the Sun because _____.
amm1812

This is a poorly written question.

<span>Out of the choices listed, the first one is the only one that includes
a true statement ... the greater the mass of two objects, the greater
the gravitational attraction is between them.</span> 

-- Newton's law of universal gravitation doesn't "suggest" that.  It states it ...
boldly and unequivocally.

-- The law doesn't refer to the "greatness" of the mass of the two objects. 
It refers to the product of their masses.

-- It's true that the law of universal gravitation can be massaged and
manipulated to reveal the existence of gravitational planetary orbits.
But there's a lot more to it than simply the masses.

For example ... the gravitational force between two objects is inversely
proportional to
                           (the distance between the objects)² .

It turns out that IF that exponent were not precisely, exactly  2.000000... ,
then gravitational orbits could not exist.

8 0
3 years ago
If a barometer reads 772 mm hg, what is the atmospheric pressure expressed in pounds per square inch?
VLD [36.1K]
15.23.....................
8 0
3 years ago
Read 2 more answers
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