CHEMISTRY HIGH SCHOOL

When a substances is dissolved in fluid, the substance is referred to as the ______, the fluid it dissolves into the ______, and the entire mixture is called the _______

Answers

Answer 1
Answer:

Answer:

solute, solvent, solution

solute dissolve in a solvent and the end product is called solution

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Why do scientists use stirbars in the laboratory?a. to cool a solution
b. to heat a solution
c. to decrease the surface area of a solute
d. to agitate a solution

Answers

Answer : The correct option is, (d) to agitate a solution

Explanation :

Stir bars is a type tool which is used in the chemical laboratory for mixing the solute in the solvent.

Stir bars is a magnet which is covered with such type of material that does not react with any liquid it is immersed in. Its cover is not react for any type of liquids.

The stir bar magnet is placed in a container or flask. The stir bar magnet made to spin with an external magnetic field.

The stir bar magnet is used in the laboratory to agitate a solution.

Hence, the correct option is, (d) to agitate a solution
D. to agitate a solution

Select the three types of cells in the blood.blue
red
black
white
platelets
round

Answers

Red white and plantelets hope it helps =)
Three selected types of cells in blood are Red White Round

How many joules are needed to warm 45.0 grams of water from 30.0 degrees C to 75.0 degrees C?

Answers

Answer : The amount of heat needed are, 8464.5 J

Explanation :

Formula used :

q=m* c* (T_(final)-T_(initial))

where,

q = heat gained = ?

m = mass of water = 45.0 g

c = specific heat of water = 4.18J/g^oC

T_(final) = final temperature = 75.0^oC

T_(initial) = initial temperature = 30.0^oC

Now put all the given values in the above formula, we get:

q=45.0g* 4.18J/g^oC* (75.0-30.0)^oC

q=8464.5J

Thus, the amount of heat needed are, 8464.5 J
q=m x Cp x ∆T

m is the mass of the water, Cp is the specific heat of water and ∆T is the change in temperature of the water (final-initial temperature). q is the energy involved in the reaction, measured in joules. 

q=(45.0) x (4.184 Jg^-1/°C^-1) x (45°C)
q=8472.6 Joules

Copper has a density of 8.920 g/cm3. What mass of copper will occupy 45cm3? What volume of copper will have a mass of 1.0 kg?

Answers

density = mass/volume
so rearranged mass = volume x density
mass = 8.920 x 45 = 401.4g

rearrange   (there are 1000grams in 1kg)
volume = mass/density
volume = 1000/8.920
volume = 112.1076233cm3

What elements fill the d orbitals on the periodic table?

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The elements that fill the d orbitals on the periodic table are called transition metals.

Write these chemicals in order starting with the one that turns into gas the easiest. Naphtha, diesel, bitumen, petrol

Answers

naptha! hope i helped
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