List 4 methods that can be used to separate mixtures and physical properties that are used when using each method.this is for my homework! please help!!!

Answers

Answer 1
Answer: well you could sort it out based on color you could stain and that uses size you could get a magnet if you want to seperate out iron or something which uses electro magnetism and if it is a liquid you could let it stand till it seperates using density

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How many moles of hydrogen gas are generated when 4.0 moles of water react with excess calcium

Answers

Answer:

2moles of H2

Explanation:

First, let us generate a balanced equation for the reaction between calcium and water. This is illustrated below:

Ca + 2H20 —> Ca(OH)2 + H2

From the equation,

2moles of H2O produced 1mole of H2.

Therefore 4moles of H2O will produce = 4/2 = 2moles of H2.

Amy is at basketball practice. She is about to shoot a free throw. When she releases the ball the ball will not have kinetic energy but will have potential energy. the ball will have kinetic energy but will not have potential energy. the ball will have kinetic energy and potential energy. the ball will have neither kinetic energy nor potential energy.

Answers

The ball will have kinetic energy because the released the potential and kinetic is taking over.

Answer:

The ball will have kinetic energy and potential energy

Explanation:

When Amy releases the ball, it will be moving. Therefore, it will have kinetic energy. But, because the ball will be in the air, it will also have gravitational potential energy. I also did the Study Island

PLEASE HELP WILL GIVE BRAINLIEST

Answers

Answer:

I think It's either A. or C.

Explanation:

Answer:

C

Explanation:

Question 9 (2 points)Calcium oxalate is an active ingredient in witch hazel. How many moles of CaC204 are in 50.0 g?
Оа
Ob
Ос
0.39 moles
6405.00 moles
128.10 g
2.56 moles
Review Answers

Answers

Answer:

0.39 moles

Explanation:

To find how many moles are in 50.0 g of CaC₂O₄ you divide the grams of the sample by the molar mass of the compound;

(50.0 g)/(128.097 g/mol)=0.39 mol

The grams cancel out and you are left with moles!

I hope this help ^-^

pretty sure it’s 0.39 moles

Is neon element a metal nonmetal or metalloid

Answers

Neon is considered a "nonmetal inert gas".
Neon has the formula "Ne". It has atomic number of 10, which means it has 10 electrons configured as follows: 1s2, 2s2, 2p6. Based on this, neon is monoatomic and stable in standard form.
Neon is a colorless gas that exhibits an orange-red glow when placed in an electric field.

Which statement best defines a universal law

Answers

The law of attraction in physics Newton's gravitational pull means to lie close to each other. In the field of physics of each object with mass m1 always have attractive forces with another object (with mass m2). For example, a particle with other particles will always mutual attraction. Examples put forward by Sir Isaac Newton in the field of classicalmechanics that anything on the atmosphere will be pulled by the earth,which was then known as the phenomenon of falling objects.

Attractive force of gravity is expressed by Isaac Newton viaWriting in the journal Philosophiæ Naturalis Principia Mathematica onJuly 5, 1687 in the form of the following formula:

    
F = G \ frac {M_1 m_2} {r ^ 2},

Where:

    
F is the force of gravity between the two masses,
    
G is the gravitational konstante,
    
m1 is the mass of the first object
    
m2 is the mass of the object, and
    
r is the distance between the two masses.

Thistheory is then developed further that any celestial body will be mutualattraction, and this could explain why the earth should revolve aroundthe sun to offset the attractive force of gravity of the earth-sun. Byusing the gravitational pull of this phenomenon as well, meteors closerto the Earth in its journey in space will be attracted fall to earth.