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Andreyy89
3 years ago
12

14. Write a statement that makes a claim about arrangements of electrons and properties

Chemistry
1 answer:
kiruha [24]3 years ago
4 0

i dont know

Explanation:

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Which part of a seed plant develops into sperm cells? o embryo pollen 0 seed O xylem​
netineya [11]

Answer:

Pollen

Explanation:

bc i take notes and also my sister studies bio

PLZ GIMME BRAINLIEST

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3 years ago
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Identify the term that matches each electrochemistry definition.
anygoal [31]

Answer: a. Cathode

b. Galvanic cell

c. Anode

d. Electrolytic cell

e. half reaction

Explanation:

Galvanic cell or Electrochemical cell is defined as a device which is used for the conversion of the chemical energy produced in a spontaneous redox reaction into the electrical energy.

Electrolytic cell is a device where electrical energy is used to drive a non spontaneous chemical reaction.

In the electrochemical cell, the oxidation occurs at an anode which is a negative electrode and the reduction occurs at the cathode which is a positive electrode.  Thus the electrons are produced at anode and travel towards cathode.

The balanced two-half reactions will be:

Oxidation half reaction : M\rightarrow M^{n+}+ne^-

Reduction half reaction : N^{n+}+ne^-\rightarrow N

Thus the overall reaction will be: M+N^{n+}\rghtarrow M^{n+}+N

4 0
3 years ago
f a scientist took a Geiger counter into a laboratory and measured a very high reading, this would indicate that
masya89 [10]
There are high levels of radiation in the laboratory and is therefore unsafe
8 0
3 years ago
A 7.27-gram sample of a compound is dissolved in 250 grams of benzene. The freezing point of this solution is 1.02°C below that
almond37 [142]

Answer:

146 g/mol → option b.

Explanation:

This is a problem about the freezing point depression. The formula for this colligative property is:

ΔT = Kf . m . i

We assume i = 1, so our compound is not electrolytic.

ΔT = Freezing T° of pure solvent - Freezing T° of solution = 1.02 °C

m  = molality (mol of solute/kg of solvent)

We convert the grams of solvent (benzene) to kg → 250 g . 1 kg/1000 = 0.250 kg.

We replace → 1.02°C = 5.12°C/mol/kg . mol/ 0.250kg . 1

1.02°C / 5.12 mol/kg/°C = mol/ 0.250kg

0.19922 mol/kg = mol/ 0.250kg

mol = 0.19922 . 0.250kg → 0.0498 mol

molar mass = g/mol → 7.27 g / 0.0498mol = 146 g/mol

5 0
3 years ago
Can someone help and answer this please?
jonny [76]

Answer:

2 moles

Explanation:

because they said c

7 0
3 years ago
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