Answer:
The given reaction is combustion reaction heat is also produced.
Explanation:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
The given reaction is combustion of methane. When methane burn it produced water and carbon dioxide. Heat is also produced.
The given reaction followed the law of conservation of mass.
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
CH₄ + 2O₂ → CO₂ + 2H₂O
There are equal number of carbon hydrogen and oxygen atoms present on both side of equation. So it follow the law of conservation of mass.
Answer:
Buoyancy is the ability or tendency of an object to float in a fluid: a liquid or a gas. This happens because fluid pressure increases with depth. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.
Explanation:
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Answer</h2>
2.626984127 m
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Explanation:</h2><h2>
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You have to know the equation that relates wavelength, frequency, and velocity (it's like speed but a bit different).
v = f x λ
where:
v = velocity
f = frequency
λ = Wavelength
Rearrange to make λ subject:
λ = v / f
We've been given 331 as the speed, 126 as the frequency. Sub it into the equation:
331 / 126 = 2.626984127 m
Answer:
11.3 g/cm³
Explanation:
Data Given:
Diameter of lead ball = 10.0 mm
Convert mm to cubic centimeter (cm³)
1 mm = 0.1 cm
So,
10.0 mm = 10.0 x 0.1 = 1 cm
mass of lead ball = 5.910 g
density of of lead ball =?
Solution:
To find density formula will be used
d = m/V ...........(1)
where
d = density
m = mass
V = volume
So,
To find the density of the lead ball (sphere), first we have to find volume of the ball.
To find volume of the ball following formula will be used
V = 4 . π . r³/ 3 ..............(2)
where
π = 3.14
r = radius
So,
as
So, radius will be
r = 1 cm / 2
r = 0.5 cm
Now put values in formula 2
V = (4)(3.14)(0.5cm)³/ 3
V = (12.56)(0.125 cm³) /3
V = 1.57 cm³/3
V = 0.523 cm³
So, the volume of the lead ball is 0.523 cm³
Now put values in equation 1
d = m/V
d = 5.910 g / 0.523 cm³
d = 11.3 g/cm³
Density of the lead ball = 11.3 g/cm³
Answer:
C. ancestors of
Explanation:
The species found as extinct in the fossil records are often times the ancestors of modern species.
- Based on the concept of evolution, organisms formed from their earlier forms.
- A concise trace and study of the history of organism often shows similarity in functions and properties between present day organisms and their ancestors.
