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LenaWriter [7]
3 years ago
5

Need help can somebody help me please

Chemistry
1 answer:
Snezhnost [94]3 years ago
7 0

Answer:

A. filtration

B. distillation

C.magnet

D. evaporation

Explanation:

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If you began a reaction with the following ions in solution, what would be the net ionic equation?
Mumz [18]

Answer:

2 PO₄³⁻(aq) + 3 Fe²⁺(aq) ⇒ Fe₃(PO₄)₂

Explanation:

Let's consider the complete ionic equation between the ions present. It includes all the ions and the insoluble compounds (Fe₃(PO₄)₂ is insoluble).

Na⁺(aq) + 2 PO₄³⁻(aq) + 3 Fe²⁺(aq) + NO₃⁻(aq) ⇒ Fe₃(PO₄)₂ + Na⁺(aq) + NO₃⁻(aq)

The net ionic equation includes only the ions that participate in the reaction (not spectator ions) and the insoluble compounds.

2 PO₄³⁻(aq) + 3 Fe²⁺(aq) ⇒ Fe₃(PO₄)₂

6 0
3 years ago
What ionic compounds have +2 ions and -3 charge
Vinil7 [7]

Answer:

sodium chloride NaCl

Explanation:

7 0
3 years ago
High energy waves have long wavelengths and low frequencies. long wavelengths and high frequencies. short wavelengths and low fr
creativ13 [48]
High energy waves have short wavelengths and thus high frequencies as a result.
5 0
3 years ago
Read 2 more answers
Write a paragraph (5-7 sentences) describing pH and conductivity.
PilotLPTM [1.2K]

Answer:

pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline. A pH level of 7.0 at 25°C is defined as "neutral" because the concentration of H3O+ equals the concentration of OH− in pure water. On the other hand, electrical conductivity is a non-specific measurement of the concentration of both positively and negatively charged ions within a sample. So the short answer to the question is as follows, the presence of any hydrogen ions present in a substance will impact the pH level and most probably influence conductivity levels. However, hydrogen ions make up only a small part of the ion concentration measured by a conductivity meter.

4 0
3 years ago
The density of silicon is 2.33 g/cm 3 . What is the volume of a piece of silicon that has a mass of 83.8 g ?
horrorfan [7]
Density is found by dividing mass over volume:
d=M/V. In this problem, we know the density, and the mass. Solve the general equation for volume, then enter the values from the problem and evaluate:
d=m/v [multiply v to both sides, then divide d from both sides]

v=m/d
v=83.8g/(2.33g/cm³)
v=35.965 cm³
v=36.0 cm³ to three significant figures (since your given information only has 3  sig figs)
5 0
3 years ago
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