Sometimes when an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil. This fossil is called a cast fossil. The fossilized imprint is called a mold fossil. Bzhzzjskdkzkzbdzvdhdjdjdjdjdjd
<span>MgSO4 and Sr(NO3)2 are both soluble, so the ionic equation would look like this.
Mg+2 + SO4-2 + Sr+2 + 2NO3-1 ---> Mg+2 + 2NO3-2 + SrSO4
SrSO4 is insoluble. Now Mg and 2NO3 are on both sides, so cross them out, the net ionic equation is
SO4-2 + Sr+2 ----> SrSO4</span>
The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
Modern periodic table is based on atomic number. Thus, the properties of elements are related to their atomic number or electronic configuration. Elements are arranged according to increasing order of atomic number. Elements with similar properties occur at regular intervals in the periodic table. The cause of periodicity in properties is due to recurrence of similar outer electronic configuration at certain regular intervals.
Answer:
Zn + 2HCl => ZnCl2 + H2
Explanation:
This equation represents salt formation or salt preparation. Thus not a neutralization reaction.
The correct answer is: 6.173 seconds.
Explanation:
The formula for half life (of reaction) is:
Half-life = --- (A)
Where,
K = Rate constant = 0.54
I = Initial concentration = 0.30 m
Plug in the values in equation (A):
Half-life =
Hence, the half life is 6.173 seconds.