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Vera_Pavlovna [14]
3 years ago
14

What is the last element in the periodic table?

Chemistry
2 answers:
borishaifa [10]3 years ago
6 0

Answer:

Ununoctium

Explanation:

It's at the very end of the periodic table

MrRa [10]3 years ago
5 0

Answer:

Ununoctium

Explanation:

Ununoctium is the last chemical element int the periodic table.

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What is produced by a neutralization reaction between an arrhenius acid and an arrhenius base?
stepladder [879]

Answer: Salt and Water

Explanation:

An Arrhenius acid (HCl) can best be defined as any substance that when added to water increases the concentration of H+ ions.

While an Arrhenius base (KOH) is any substance that when added to water increases the concentration of OH- ions.

When an Arrhenius acid such as HCl reacts with an Arrhenius base such as KOH, the end products will be salt and water, in a process called Neutralization Reaction.

HCl (aq) + KOH (aq)  -------> KCl (aq) + H2O (l)

4 0
2 years ago
How many copper atoms are in 70g of copper
Elanso [62]

Answer:

n = 6.634\times 10^{23}\,atoms

Explanation:

The total amount of atoms is found by multiplying Avogradro's Number and the number of moles:

n = \left(6.022\times 10^{23}\,\frac{atoms}{mol} \right)\cdot \left(\frac{70\,g}{63.546\,\frac{g}{mol} } \right)

n = 6.634\times 10^{23}\,atoms

4 0
3 years ago
Which item has the most thermal energy?
Ksju [112]

Answer:

1L of hot water just below the Boling point

Explanation:

asking questions is best to learn please ask more questions

3 0
3 years ago
Read 2 more answers
Calculate the mass (in ng) of 2.33 x 1020 atoms of oxygen.
Law Incorporation [45]
<span>Answer = 6.19 x 10^6  </span>
4 0
2 years ago
Read 2 more answers
I NEED HELP PLEASE, THANKS!
ira [324]

Answer:

About 0.652

Explanation:

Because the reaction is balanced, we can go straight to the next step. The molar mass of potassium is about 39.098, while the molar mass of hydrogen gas is 2 and the molar mass of water is 18. Therefore, 25.5g of potassium would be about 0.652 moles, and 220 grams of water would be about 12.222 moles, making potassium the limiting reactant. Since there is a single unit of each compound on both sides of the equation, there would be an equal amount of moles of potassium and hydrogen, and therefore about 0.652 moles of hydrogen gas would be produced. Hope this helps!

6 0
2 years ago
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