Answer:
Explanation:
Speed is distance covered per unit time.it is a scaler quantity. It unit is m/s.
Velocity is speed in a given direction.it is a vector quantity. It unit is m/s.
Acceleration is the rate of increase in velocity.it is a vector quantity.it unit is m/s^2
Answer:
See Explanation
Explanation:
1) Let us recall that;
Mass number = number of protons + number of neutrons
Where;
Number of protons = ?
Number of neutrons =20
Mass number =39
Number of protons = mass number - number of neutrons
Mass of protons =39 - 20= 19 protons
2) Atomic number = 13
Number of neutrons =14
Then the mass number =13 +14 =27
The symbol of the element is 27X13
The number of protons= the number of electrons =13
The atomic number is the same as the proton number =13
One is: vinegar and baking soda volcano. But a more planned, complicated experiment, would be a nuclear energy program.
Answer:
90 mg of H₂O
Explanation:
The reaction that takes place is:
2HCl + Ba(OH)₂ → BaCl₂(aq) + 2H₂O
With the information given by the problem and the definition of <em>molarity</em> (M=n/V), we can calculate the moles of HCl:
20.00 mL * 0.250 M = 5 mmol HCl
Now we use the <em>stoichiometric ratio</em> to <u>convert moles of HCl</u> to moles of H₂O and then to mass of H₂O:
5 mmol HCl * 
= 90 mg H₂O
