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Katarina [22]
3 years ago
5

Help and explain step by step if you can!

Chemistry
1 answer:
Leona [35]3 years ago
4 0

Answer:

the third one

Explanation:

if you look at it mathematically its the one that makes the most sense

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BRAINLIESTTT ASAP!!! PLEASE HELP ME :)
Nady [450]

copper (ll) oxide

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ionic bond

4 0
3 years ago
Sodium carbonate is often used in certain candies to create fizzy bubbles when solid weak acids in the candy are dissolved with
erastovalidia [21]

Answer is: in chemical reaction with with weak acid, sodium carbonate produce carbonic acid (H₂CO₃), which decomposes into carbon(IV) oxide (fizzy bubbles) and water.

Balanced chemical reaction:

Na₂CO₃ + 2HClO → CO₂(g) + H₂O + 2NaClO.

Chemical decomposition is the separation of a carbonic acid into water and carbon dioxide: H₂CO₃ → CO₂ + H₂O.

6 0
2 years ago
A laboratory technician needs to prepare 500 milliliters of a 2 M solution of sodium hydroxide (NaOH) in a flask. The flask has
Marat540 [252]

Answer:

40 g NaOH

Step-by-step explanation:x

To make 500 mL of a 2 mol·L⁻¹ solution, the technician must measure the correct mass of NaOH.

Step 1. Calculate the <em>moles of NaOH </em>

c = n/V     Multiply both sides by V

n = Vc

c = 2 mol·L⁻¹

V =0.5 L

n = 0.5 × 2

n = 1 mol NaOH

Step 2. Calculate the <em>mass of NaOH </em>

The molar mass of NaOH is 40.00 g/mol.

m = 1 × 40.00/1

m = <em>40 g NaOH </em>

The technician must measure <em>40 g of NaOH</em>.

4 0
3 years ago
Read 2 more answers
Which statement describes the periodic law?
mr_godi [17]
Answer is: elements in the same group have similar chemical properties.
Periodic law<span> is the arrangement of the </span>elements<span> in order of increasing atomic number.
</span>For example all alkaline metals (I group of periodic table, Na, K, Cs...) loose one electron in chemical reaction and react vigorously with water.
3 0
3 years ago
Read 2 more answers
Where are chemicals found
Vinvika [58]

Answer:

Most substances found in nature-such as wood, soil, and rocks-are mixtures of chemical compounds. These substances can be separated into their constituent compounds by physical methods, which are methods that do not change the way in which atoms are aggregated within the compounds.

6 0
3 years ago
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