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ZanzabumX [31]
3 years ago
7

Technician A says that objects with high permeability allow magnetic lines of flux to flow easily through their material. Techni

cian B says that some objects are good insulators that will not allow magnetic lines of flux to flow through their material. Which technician is correct?A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Chemistry
1 answer:
Mice21 [21]3 years ago
4 0

Answer:Both technicians

Explanation:

Magnetic permeability refers to the degree of magnetic flux established within a material by a magnetising field divided by the actual field strength. Materials that have high magnetic permeability allow lines of force to pass through them easily. Some insulator materials do not allow magnetic flux to flow through them easily while some do allow it. Those insulators that allow magnetic field to pass through them are called magnetic insulators e.g Fe2O3 and some other transition metal oxides.

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List 3 ways how we know plants are alive?
adelina 88 [10]
They use natural resources like sunlight water they need soil water and sunlight to grow the stem should be pliable and firm and will have a green cast on the inside
3 0
3 years ago
Example for next four problems:
Lena [83]

Answer:

Compound formula : HCl

Element H

# atoms:1

Elements Cl

#atoms : 1

gram formula weight (g) = 36.46

4 0
3 years ago
Ca(NO3)2 + HCl --> HNO3 + CaCl2
aliina [53]
Calcium nitrate is limiting reactant, since it says there’s excess HCl. So you must use the mass of calcium nitrate in your calculation (see picture below):

5 0
3 years ago
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor. How many grams of di
pychu [463]

Answer:

16.79 grams of dinitrogen monoxide are present after 31.3 g of calcium nitrate and 38.7 g of ammonium fluoride react completely. And calcium nitrate is a limiting reactant. Explanation:

Ca(NO_3)_2(aq)+2NH_4F(aq)\rightarrow CaF_2(aq)+2N_2O(g)+4H_2O(g)

Moles of calcium nitrate = \frac{31.3 g}{164 g/mol}=0.1908 mol

Moles of ammonium fluoride = \frac{38.7 g}{37 g/mol}=1.046 mol

According to reaction , 2 moles of ammonium fluoride reacts with 1 mole of calcium nitrate.

Then 1.046 moles of ammonium fluoride will react with :

\frac{1}{2}\times 1.046 mol=0.523 mol calcium nitarte .

This means that ammonium fluoride is in excess amount and calcium nitrate is in limiting amount.

Hence, calcium nitrate is a limiting reactant.

So, amount of dinitrogen monoxide will depend upon moles of calcium nitrate.

So, according to reaction , 1 mole of calcium nitarte gives 2 moles of dinitrogen monoxide gas .

Then 0.1908 moles of calcium nitrate will give:

\frac{2}{1}\times 0.1908 mol=0.3816 molof dinitrogen monoxide gas.

Mass of 0.03816 moles of dinitrogen monoxide gas:

0.03816 mol × 44 g/mol = 16.79 g

16.79 grams of dinitrogen monoxide are present after 31.3 g of calcium nitrate and 38.7 g of ammonium fluoride react completely. And calcium nitrate is a limiting reactant.

8 0
3 years ago
A reaction has an equilibrium constant of 7.9×10³ at 298 K. At 713 K, the equilibrium constant is 0.77.
Katen [24]

Answer:

option b is correct

Explanation:

Taking the Van't Hoff equation

d ln Keq / dT = ΔH/(RT²)

then

Keq increases with increasing temperature (d ln Keq / dT>0) when ΔH>0 and decreases with increasing temperature (d ln Keq / dT<0) when ΔH<0

if Keq decreases (reactions shift toward reactants) from 7.9×10³ to 0.77 when temperature increases from 298 K to 713 K (d ln Keq / dT<0) → ΔH<0 ( exothermic reaction)

therefore option b is correct

8 0
4 years ago
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