Answer:
3.05 ×10³ Kg/m³
Explanation:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
Symbol:
The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.
Given data:
Density = 3.05 g/cm³
Density in Kg/m³ = ?
Solution:
In order to convert the g/cm³ to Kg/m³ we will multiply the value with 1000.
3.05 g/cm³ × 1000 Kg/m³ / 1 g/cm³
3050 Kg/m³
In scientific notation:
3.05 ×10³ Kg/m³
D. Even though the temperature is the same, container B has more thermal energy, since it has more liquid than container A.
<u>Explanation:
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Whenever there is an increase in the volume of the pink liquid, it is due to the increase in temperature.
When the temperature increases, the molecules move farther apart as much as possible.
When the molecules moves apart from each other and collide with each other, so that its kinetic energy also increases, So thermal energy of the container B is more compared to the container A.
Answer:
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SiO2 is the chemical formula silicon and oxygen
Molecular mass of nitrogen, N2 = 2*14 = 28
molecular mass of hydrogen, H2=2*1 = 2
Molecules of both elements contain 2 atoms, so the ratio of molecules is the same as the ratio of atoms.
From the molecular masses above,
ratio of number of molecules = ratio of molecular masses, therefore
7g N2 : x g H2 = 28:2
cross multiply:
x=7*2/28=0.5 g of Hydrogen has the same number of atoms as 7 g of nitrogen (at room temperatures)
