Balanced <span>chemical equation :
</span><span>1 MgCO3 + 2 HCl = 1 MgCl2 + 1 H2CO<span>3</span></span>
The number of years that must be invested at a rate of 7 % to earn$ 303.52 in interest is
8 years
<em><u>calculation</u></em>
- <em><u> </u></em><em>by use of the formula A = P (1+ rt) </em>
- <em> where : A is the final amount = 542 + 303.52 =$ 845.52</em>
<em> P is the principal money to be invested = $ 542</em>
<em> r= rate= 7/100=0.07</em>
<em> t= time required</em>
<em>=$ 845.52=$ 542( 1+ 0.07 t)</em>
- <em>open the bracket</em>
- <em>= $845.53= $542 + $37.94 t</em>
- <em>like terms together</em>
=$ 845.53 -$542 = $37.94 t
=$303.52 =$37.94 t
- divide both side by $37.94
= $303.52/ $ 37.94 = $37.94t/$37.94
t= 8 years
Volume of sphere = 
where, 
= 
r = radius of sphere
Put the given value of volume in above formula i.e. (
)
Thus,
![r = \sqrt[3]{0.453\times 10^{-30}m^{3}}](https://tex.z-dn.net/?f=r%20%3D%20%5Csqrt%5B3%5D%7B0.453%5Ctimes%2010%5E%7B-30%7Dm%5E%7B3%7D%7D)
= 
= 
= 
Thus, radius of the carbon atom is
Answer:
Genetics
Explanation:
I did this question five minutes ago on Edge.
Answer:
A.0.51L
B 1.67L
Explanation:
using the formula ;C1V1 =C2V2
15.8×V1=2×4
15.8V1=8
V1=8/15.8
V1=0.51L
apply the same method for B
