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s2008m [1.1K]
3 years ago
13

What does the number on the top left of the symbol show?

Chemistry
2 answers:
Ad libitum [116K]3 years ago
5 0

Answer: Exponent

Explanation:

For example

2^2 means 2x2

kkurt [141]3 years ago
3 0

Answer:

Atomic mass

Explanation:

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I am doing science, periodic table. what is an element that has 0 neutrons? I even searched online and it said that's not an ele
Trava [24]

Answer:

element hydrogen

Explanation:

There is only one stable atom that does not have neutrons, it is also an element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom. Hope this helped!

8 0
3 years ago
Limiting Reactant
liraira [26]

Answer:

(1) Cl₂ is the limiting reactant.

(2) 8.18 g

Explanation:

  • 2Na(s) + Cl₂(g) → 2NaCl(s)

First we <u>convert the given masses of reactants into moles</u>, using their <em>respective molar masses</em>:

  • Na ⇒ 12.0 g ÷ 23 g/mol = 0.522 mol Na
  • Cl₂ ⇒ 5.00 g ÷ 70.9 g/mol = 0.070 mol Cl₂

0.070 moles of Cl₂ would react completely with (2 * 0.070) 0.14 moles of Na. There are more Na moles than that, so Na is the reactant in excess while Cl₂ is the limiting reactant.

Then we <u>calculate how many moles of NaCl are formed</u>, <em>using the limiting reactant</em>:

  • 0.070 mol Cl₂ * \frac{2molNaCl}{1molCl_2} = 0.14 mol NaCl

Finally we <u>convert NaCl moles into grams</u>:

  • 0.14 mol NaCl * 58.44 g/mol = 8.18 g
3 0
2 years ago
Question 4 (1 point)
Rainbow [258]

а о

Explanation:

 The given cation:

           (Rf₂Al₂F₃)³⁺

The oxidation number gives the extent to which a specie is oxidized in a reaction.

This number is assigned based on some rules:

  • Elements in combined state whose atoms combines with themselves have an oxidation number of zero.
  • The charge carried on simple ions gives their oxidation number.
  • Algebraic sum of all the oxidation numbers of atoms in neutral compound is zero. In an ion with more than one kind of atom, the charge on it is the oxidation number.

for the specie given;

Known:

  oxidation number of Al = +3

                                      F = -1

                          charge = +3

    let the oxidation number of Rf = k

        2k + 2(3) + 3(-1) = +3

          2k + 6 - 3 = 3

            2k = 0

              k = 0

The oxidation state of rutherfodium is 0

learn more:

Oxidation state brainly.com/question/10017129

#learnwithBrainly

8 0
3 years ago
A balanced equation tells you the mole ratio of all reactants and products. Using the chemical reaction below how many moles of
vichka [17]
<span>By using the mole ratio, we can determine that 2 moles of NH3 are made when 3 moles of hydrogen gas are present. The numbers in front of the chemicals tell us the relative amounts consumed and produced. Since there is a 3 in front of H2 and a 2 in front of NH3, this tells us that for every 3 moles of H2 gas used, 2 moles of NH3 are made.</span>
5 0
3 years ago
Read 2 more answers
Use the periodic table to choose the correct name for each of the following substances. Check all tha
Vinvika [58]

Answer:

phosphorus trichloride

8 0
3 years ago
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