Answer:
1.5L of NaNO3 must be present
Explanation:
<em>That contains 200g of sodium nitrate. Round to 2 significant digits</em>
To solve this question we need to convert the mass of NaNO3 to moles using its molar mass (85g/mol). With the moles and the molar concentration we can find the volume in liters of the solution:
<em>Moles NaNO3:</em>
200g * (1mol / 85g) = 2.353 moles NaNO3
<em>Volume:</em>
2.353 moles NaNO3 * (1L / 1.60moles) =
<h3>1.5L of NaNO3 must be present</h3>
B. the frogs are a limiting factor for the gnats
the frogs limit the reproduction of the gnats, and therefore with less frogs the gnat population can increase
I think it’s A (6), pls give brainliest!
Answer:
a) Molecular crystal
b) Molecular crystal
c) Molecular crystal
d) Ionic crystal
e) Metallic crystal
f) Covalent crystal
g) Ionic crystal
h) Metallic crystal
Explanation:
The bonds between the elements can be classified as ionic, covalent or metallic. The ionic bonds happen between a metal and a nonmetal, where the metal donates electrons and the nonmetal gain the electrons, forming ions. When this occurs, the solid formed is called ionic crystals, such as KBr and LiCl.
When the bond is between nonmetals, its called a covalent bond, and the nonmetals share pair of electrons. When a solid is formed, it can be called as covalent crystals or molecular crystals. The molecular crystals are formed by a determined number of electrons such as CO₂, Br₂ and S₈. On the other hand, the covalent crystals are polymolecular, such as the silica, SiO₂.
When metals do bonds between them, the bond is called a metallic bond, which can happen between atoms of the same element or different elements. The solid formed is called metallic crystal, such as Mg, and Cr.
Answer:
1.43 ×10⁻⁷ cm
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
Radius of molecule of lysozyme:
1430 pm
In centimeter:
1430/10¹⁰
1.43 ×10⁻⁷ cm
The expanded notation is standard notation of writing the numerical values which is normal way. The numbers are written as they are, without the power of 10 such as, 1430 pm.
