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4 years ago

How does a magnet separate mixtures?

2 answers:

N76 [4]4 years ago

8 0

It can only do that when one of the components of the mixture is a magnetic
material.

When you have that situation, you pass the magnet over the mixture ... shaking
the mixture if it's a dry mixture of powders or pieces ... and the magnetic part of
the mixture moves toward the magnet, while the nonmagnetic parts of the mixture
couldn't care less about the magnet and they just stay where they are.

Naily [24]4 years ago

3 0

It will separate when one of the elements found in the mixture is magnetic. This process can't be done in a compound as a compound is chemically bonded!

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A sample of iron has a mass of 46.8 grams and a volume of 6 cm3. What is the density of iron?

il63 [147K]

The equation for density id D=M/V, which is density is equal to mass over volume. The mass (46.8 g) divided by the volume (6 cm^3), is the density. I calculated it to be 7.8 g/cm^3

6 0

3 years ago

Read 2 more answers

10. Predict the mass of nitrogen dioxide produced if 2.30 L of ammonia are allowed to react

Scrat [10]

Answer:

Mass of nitrogen dioxide produced = 4.6 g

Explanation:

Given data:

Volume of ammonia = 2.30 L

Mass of nitrogen dioxide produced = ?

Solution:

Chemical equation:

4NH₃ + 7O₂ → 4NO₂ + 6H₂O

Number of moles of ammonia at STP:

PV = nRT

n = PV/RT

n = 1 atm × 2.30 L / 0.0821 atm.L/K.mol × 273 K

n = 2.30 atm .L / 22.414 atm.L/mol

n = 0.1 mol

Now we will compare the moles of ammonia with nitrogen dioxide from balance chemical equation.

NH₃ : NO₂

4 : 4

0.1 : 0.1

Mass of NO₂:

Mass = number of moles × molar mass

Mass = 0.1 mol × 46 g/mol

Mass = 4.6 g

7 0

3 years ago

Plz help! The best answer will be marked as brainliest!

navik [9.2K]

Answer:

Oxygen and Magnesium together, OMg?!?!

6 0

3 years ago

1. A gas having the following composition is burnt under a boiler with 50% excess air.

jeka94

The composition of the stack gas are :

$CH_4$ = 0.8713

$C_3H_8$ = 0.0202

CO = 0.107

<h3 /><h3>What is a mole fraction?</h3>

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of $CH_4$ : 70% of 100 g = 70 g

Mass of $C_3H_8$ : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of $CH_4$ : $\frac{70 g}{16.04 g/mol}$ = 4.3 mole