Okay, so the volume here is real simple if you get the problem and have the right equation which is v=21x12x3.5= 882 cm^3.
<h3>
Answer:</h3>
0.0488 g
<h3>
Explanation:</h3>
We are given
The radioisotope Fluorine-21
Half-life is 5 seconds
Initial mass of Fluorine-21 is 200 g
Time = 1 min or 60 seconds
Required to determine the New mass after decay
- We need to know that half life of a radioisotope is the time taken by a radioactive isotope to decay by half the original amount.
- To calculate the remaining mass after decay we use the formula,
New mass = Original mass × (1/2)^n , where n is the number of half lives.
In this case, n = 60 s ÷ 5 s
= 12
New mass = 200 g × (1/2)^12
= 200 g × 1/4096
= 0.0488 g
Therefore, the mass of Fluorine-21 remaining after 1 minute is 0.0488 g
First one is balanced because all of the elements in reactant and product have equal number of atoms.
second one is not balanced therefore you need to add coefficient to balance it. so its CaCl2 + 2NaHCO3 = CO2 + CaCO3 + H2O + 2NaCl
both of them seem double replacement reaction
Hope it helps!
~ Rabin
Answer:
1.3x10⁻⁸ mol/L
Explanation:
<em>0.0013μmol, Calculate concentration in mol/L</em>
<em />
To obtain concentration in mol/L we need to convert the μmoles to moles and mL to liters:
<em>Moles silver(II) oxide:</em>
0.0013μmol × (1mol / 1x10⁶μmol) = 1.3x10⁻⁹ moles
<em>Liters solution:</em>
100mL * (1L / 1000mL) = 0.1L
That means concentration in mol/L is:
1.3x10⁻⁹ moles / 0.1L =
<h3>1.3x10⁻⁸ mol/L</h3>
Answer:
First, the protein may be a structural protein, contributing to the physical properties of cells or organisms. ... Second, the protein may be an enzyme that catalyzes one of the chemical reactions of the cell. Therefore, by coding for proteins, genes determine two important facets of biological structure and function.
Explanation:
i think it will help you