Answer:
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:
Mass = 1.060 g
Volume = 1.0 mL
Density in correct number of significant figures= ?
Solution:
d = m/v
d = 1.060 g / 1.0 mL
d = 1.06 g/ mL
The density 1.06 g/mL contain three significant figures Henry should report it 1.1 g/mL having the only one digit after decimal because in given values 1.060 and 1.0 the least number of significant figures after the decimal is 1 that's why the final result must have one significant figure after decimal.
Answer:
C
Explanation: There are three significant figures.
1. How many neutrons are in the chlorine atom?
2. How many electrons are in the chlorine atom?
3. How many protons are in the chlorine atom?
Answer:
1. 18 neutrons
2. 17 electrons
3. 17 protons
Answer:
1. 18 neutrons
2. 17 electrons
3. 17 protons
Explanation:
Proteins catalyze reactions, part of the immune system, transport molecules such as oxygen, and transmit messages from cell to cell.
Proteins are very large molecules made of basic units known as aminoacids. Proteins consist of carbon (C), hydrogen (H), nitrogen (N), oxygen (O), and sulfur (S).
Protein molecules are produced by twisted and folded strands of amino acids. Proteins are actively involved in the most important as well as basic aspects of life. These include metabolism, cellular communication, movement, molecular recognition, and defense.
The shape of structural proteins allows them to form essential structures of the body. Collagen holds most of the body tissues together, a protein with a fiber shape. Structural protein Keratin creates a network of waterproof fibers on the outer layer of the skin.
The shape of functional proteins enables them to contribute to the chemical processes of the body. Functional proteins include cell membrane receptors, hormones, growth factors, and enzymes.
Learn more about proteins, here:
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Answer:
D. chemical bonding
Explanation:
Atoms are joined to form compounds by ionic bonds (formed when one or more electrons are transferred from one atom to another) or covalent bonds (formed when atoms share electrons instead of transferring them). The ionic bonds and covalent bonds are both different types of chemical bonds.
Answer:
The force is 19.3N
Explanation:
F = m × a
= 9.2 × 2.1
= 19.3N (3sf)