The percent composition of hydrogen is 18.3%.
What is percent composition?
The term percent composition refers to the percentage of a particular component in a compound. It is contained as the ratio of the mass of that component to the total mass multiplied by 100.
From the law of conservation of mass, total mass of beryllium hydride(BeH2) = 85.2 g
Mass of hydrogen = 15.6 g
Percent composition of hydrogen = 15.6 g/ 85.2 g × 100/1 = 18.3%
Amylase is the enzyme found in saliva an starts to digest food from in the mouth. Starch is a polysaccharide found in foods such as bread, yam, potatoes. This molecule is the carbohydrate component of foods and is the main source of energy as food. At the moloecular level, the enzyme amylase breaks the bond that forms maltose into two individual glucose molecules.
Answer:
True
Explanation:
The correct option is; True.
Unimolecular elementary steps in a reaction requires only one reactants, they are usually decomposition reactions. They take the general form;
A --> B + C
I can tell you about:
- What natura transmutation is
- Which elements suffer natural transmutation
- Some examples of nuclear equation representing natural transmutation
1) Natural transmutation is the transmutation that occurs in nature without intervention of human beings. So, the natural transmutation is the natural decay of elements into other (smaller) elements. The transmutation of the elements consists in the emission of particles (alpha emission, beta emission, positron emission or electron emission) and the obtention of a smaller element.
2) Which elements undergo natural transmutation.
The heavier elements, after lead, are radioactive and so they decay into lighter (smaller) elements. Those elements are unstable due to the relation proton / neutron.
3) Transmutation equation examples
I131 ----> Xe131 + Beta particle
Ra222 ---> Rn218 + 2He4 (same alpha particle)
90Th234 ----> 89Pa234 + beta particle
92U238 ----> 90Th 234 + 2He4 (same alpha particle)