<em>C = 0,75 mol/dm³</em>
<em>V = 500mL = 500cm³ = 0,5dm³</em>
C = n/V
n = 0,75×0,5dm³
<u>n = 0,375 moles</u>
<em>M NaCl: 23+35,5 = 58,5g</em>
1 mole ---------- 58,5g
0,375 ----------- X
X = 0,375×58,5
<u>X = 21,9375g NaCl</u>
:)
Answer:
The bonds between atoms in the reactants are rearranged to form new compounds in chemical reactions, but none of the atoms disappear and no new ones are formed. As a consequence, chemical equations must be balanced, meaning that the number and kinds of atoms must be the same on both sides of the reaction arrow.
Explanation:
Answer:
cobalt (Co) is the correct answer.
Explanation:
The is most likely to bend without breaking element is cobalt because of the following properties.
- Cobalt is a ferromagnetic metal.
- Cobalt is a brittle and hard element.
- cobalt is not a nonmetal, it is a metal and metals are malleable and ductile means they can bend without breaking.
Hence Cobalt in their solid form they can be easily bent and changed into thin films without breaking
Answer:
Explanation:
Hello!
In this case, when balancing chemical reactions, we must make sure that the atoms of each element are the same at both reactants and products; thus, for the given reaction, we need two iron and aluminum atoms at each side based on their subscripts in the given oxides as shown below:
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Answer:During a chemical reaction, all of the atoms that make up the reactants rearrange to form the products.
Explanation:
During a chemical reaction, atoms cannot be created or destroyed.
