The answer is: " NaCl + H₂O " ; (or; write as: " H₂O + NaCl " ) .
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Specifically:
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HCl + NaOH —> NaCl + H₂O ; or; write as:
NaOH + HCl —> H₂O + NaCl .
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This type of "double-replacement" reaction is called "neutralization".
Since we are adding a strong acid to a strong base (reactants), we know that the product will be: 1) a salt ; and 2) water. Since we know one of the reactants will be "water" (H₂O) ; we can find the base (i.e. , the "remaining product") from selecting the "unused elements" to form the corresponding "salt".
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Answer:
A is a physical change, no atoms are being lost its still in it original form
B is a chemical change, it is losing atoms and changing into a new substance
Explanation:
This info tells us if it stable or not and it tells us how many electrons it need to be stable.
Answer:
One with mass 0.52kg will have higher acceleration.
Explanation:
We know that
F = m x a
As we can see, for a constant value of F , for a body having more mass will have less acceleration and a body having less mass will have more acceleration ( Inversely proportional when force applied is constant).
Therefore lesser mass body will have more acceleration.
Hence, <em>0.52 kg body will have more acceleration. </em>
Verification :
F = ma
For 0.52kg:
a= F / m = 26 / 0.52 = 50 m/s²
For 0.78kg:
a= F/m = 26 / 0.78 = 33.3 m/s²
Radioactive elements undergoes first order decay.
Now, for 1st order decay kinetics, rate constant (k) can be estimated as follows
k = 0.639/ t1/2,
where t 1/2 = half-life of radioactive material = 8 days (For Pb-209)
Also, we know that

.................(1)
Here, Co = initial conc. of radioactive element
Ct = conc. of radioactive element at time t
t = time required to reach the concentration Ct
Thus,
<span>
equation 1 can be used to estimate the amount of lead-209 present after 't' days.</span>