Answer:
the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Answer:
H+ and NO3- ions
Explanation:
The Pb²+ ions react with the SO4²‐ ions to form a solid precipitate, i.e. they bond together and undergo a phase change;
On the contrary, the H+ and NO3- ions are aqueous ions before the reaction and the same after the reaction, i.e. they don't change;
Hence, the H+ and NO3- ions are spectator ions
The way to do this type of question is to consider what changes and what doesn't, look at phase changes and oxidation state changes
<h2>Hello!</h2>
The answer is: 3.99g
<h2>Why?</h2>
First, we need to look for the Argon molecular mass:
Then, we must remember that 1 mol of an element is equal to of the same element.
So,
To know what is the mass of atoms of Ar, we need to do the following calculations:
So the mass of atoms of Argon is 3.99g.
Have a nice day!
Answer:
2) less
3) more
4) higher
5) slower (I’m not sure about this one sorry)
6) decreases
Answer:
75 Newton
Explanation:
In order to find the force of the object, you must remember that the equation N = (mass x acceleration). Therefore meaning you would divide 300 kilograms, <em>the mass, </em>by 4 meters per second (squared), <em>the acceleration.</em>