Answer:
1.666
≈ 1.67 g/cm³
Explanation:
Mass = 200g
Length = 6cm
Width = 4cm
Height = 5cm
Density = Mass/ Volume
Volume = length×width×height
Density =
Answer:
The answer is B. The population has increased and so has demand for energy resources.
Explanation:
Fracking is a technique used to increase the extraction of gas and oil from the subsoil. It consists of extracting small dispersed concentrations of hydrocarbons (it can also be done with oil). To do this, a vertical drilling of four or five kilometers is carried out and then water mixed with chemicals is introduced to fracture the rocky substrate, filtering the fuel into the conduit. Fracking is used due to the scarcity of resources and the reduction of reserves. So, while the population continues to increase, the demand for energy also increases. This leads to fracking being used to meet the high demand.
Answer:
Changing two or more variables makes it difficult to find a cause and effect relationship.
The rate of effusion of H₂ : 7.2 x 10⁻² m/s
<h3>Further explanation </h3>
Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or
the effusion rates of two gases = the square root of the inverse of their molar masses:
or
MW₁ O₂ = 32 g/mol
MW₂ H₂ = 2 g/mol
Answer: There are 20 carbons atoms, 62 oxygen atoms and 44 carbon atoms on the left side of the equation.
Explanation:
In the given chemical reaction:
Reactants side = Left side
Number of atoms =
Coefficient × Number of atoms of an element in a unit molecular formula
Number of carbon atoms = 2 × 10 = 20
Number of oxygen atoms = 31 × 2 = 62
Number of hydrogen atoms = 2 × 22 = 44