Answer:
The answer is A because it is a resource that takes many many years to make more of and we cannot make it ourselves
Answer:
2475042
Explanation:
P = Pressure = [/tex]1\times 10^{-8}\ N/m^2[/tex]
V = Volume = 1 cm³
T = Temperature = 19.5 °C
R = Gas constant = 8.341 J/mol K
= Avogadro's number = 
n = Amount of substance
From ideal gas law we have
Number of atoms is given by
The number of atoms in this vacuum is 2475042
Answer:
Homogeneous.
Explanation:
Mixture can be defined as a combination of two or more substances present in varied proportion where each materials are distinct and visibly seen by naked eyes.
In Science, there are two (2) main types of mixture and these are;
I. A homogeneous mixture: it can be defined as any liquid, solid or gaseous mixture which has an identical or uniform composition and properties throughout any given sample of the mixture. In Chemistry, all solutions are considered to be a homogeneous mixture. For example, aqueous hydrogen chloride is a homogeneous mixture of water and hydrogen chloride.
II. A heterogenous mixture: it can be defined as any mixture which has a different or non-uniform composition and properties throughout any given sample of the mixture. This ultimately implies that, the constituents of a heterogenous mixture always remain separate in the sample and as such comprises of two or more phases.
Since the chocolate milk contains more than one type of component. Therefore, it is not a homogeneous substance but a heterogenous substance.
Answer:
"Planets May Affect the Chemistry of Their Stars. Planets are, by and large, at the mercy of their stars. Not only do stars provide a ready energy source of radiated light and heat, but the mass and gravitational pull of stars flat-out dwarfs the summed masses and pulls of any orbiting companions."
