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ss7ja [257]
3 years ago
13

What is the visual differences between elements compounds and mixtures

Chemistry
2 answers:
guapka [62]3 years ago
8 0
Like an element, a compound is considered a pure substance (meaning there is only one type of particle in the substance). A mixture is a combination of two or more different chemical compounds or elemental substances. It is not a pure substance, but a combination multiple particles.


Pls give Brainiest
slamgirl [31]3 years ago
4 0

Answer: yes I can do that tomorrow

Explanation:

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If it takes 54ml of 0.1 m naoh to neutralize 125 ml of a hcl solution with unknown concentration, what is the concentration of t
dangina [55]
The balanced equation for the reaction between NaOH and HCl is as follows
NaOH + HCl ---> NaCl + H₂O
stoichiometry of NaOH to HCl is 1:1
number of NaOH moles reacted - 0.1 mol/L x 0.054 L = 0.0054 mol
number of HCl moles reacted = number of NaOH moles reacted 
since the molar ratio of acid to base is 1:1
therefore number of HCl moles reacted - 0.0054 mol
the number of moles of HCl in 125 mL - 0.0054 mol
therefore number of HCl moles in 1000 mL - 0.0054 mol / 125 mL x 1000 mL 
number of moles of solute in 1000 mL is known as the molarity concentration 
concentration of HCl is 0.0432 M
5 0
4 years ago
Which is the chemical formula for zinc phosphate
Orlov [11]
The Chemical fomulla for Zinc Phosphate

Zn3(PO4)2
3 0
4 years ago
Draw a Lewis structure for SO2 in which all atoms have a formal charge of zero. Explicitly showing the zero charges is optional.
Radda [10]

Answer:

See explanation and image attached

Explanation:

"A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity" (chemlibretext).

We can obtain the formal charge from the formula;

Formal Charge = [number of valence electrons on atom] – [non-bonded electrons + 1/2number of bonds].

A structure in which SO2 has a zero formal charge is attached to this answer.

Image credit: Chemtopper

3 0
3 years ago
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to
kicyunya [14]
To find out the answer, we must know the mass percentage of Cu in the mineral chalcopyrite.

Mass percentage of Cu = molar mass of Cu/molar mass of chalcopyrite = 64/(64+56+32*2) = 34.8%.

So to obtain 210 g pure Cu, the amount of mineral need = mass of Cu/mass percentage of Cu = 210 g/34.8% = 603 g = 0.603 kg.
8 0
3 years ago
Read 2 more answers
The fundamental unit used to measure mass is??
Soloha48 [4]

The fundamental unit used to measure mass is Kg (kilograms).

6 0
3 years ago
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