CHEMISTRY HIGH SCHOOL

3 x 1 US cup volume in millilitres (mL

Answers

Answer 1
Answer:

Answer:

3 US Cups = 720 ml.

Explanation:

  1. Officially, a US Cup is 240ml (or 8.45 imperial fluid ounces.)
  2. 3 x 1 US Cup = 3 US Cups
  3. 1 US Cup = 240 ml.
  4. ∴ 3 US Cups = 3 x 240ml
  5. = 720 ml.

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What was the optimal mix of hydrogen and oxygen to launch the pipette rockets in the Combustion lab?

Answers

Answer:

The best mixture is 2 hydrogens and 1 oxygen.

Where are the protons and neutrons and electrons located in an atom?

Answers

The protons and neutrons are located in the nucleus of an atom, while the electrons are located in the orbital cloud. 

Final answer:

Protons and neutrons are found in the nucleus of an atom while electrons are found in orbitals surrounding the nucleus. The number of protons determines the type of element the atom is.

Explanation:

In an atom, protons and neutrons are located in the nucleus, which is the central part of the atom. The electrons on the other hand, are situated in the areas around the nucleus called electron shells or orbits. Protons carry a positive charge, neutrons are neutral, and electrons carry a negative charge. The number of protons in an atom is what determines the atomic number and thus, the type of element it is.

Learn more about Atom structure here:

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Ernest Rutherford's discovery led to the understanding that atoms consist mostly of empty space with

Answers

Answer: With a positively charged nucleus.

Explanation:

You dissolve 0.74 g of potassium chloride (KCl) in 500 mL of water. What is the molarity of the solution?

Answers

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows: 


Molarity = 0.74 g (1 mol / 74. 55 g) / 500mL (1 L / 1000 mL)

Molarity = 0.02 M

Answer:

0.02 M is the answer

Explanation:

Which is something that a PURE SUBSTANCE and a SOLUTION have in common?A) They both are made of one kind of particle.
B) They both are made of different kinds of particles.
C) They both look speckled or chunky.
D) They both look uniform (the same) throughout.

Answers

D) They both look uniform (the same) throughout.

Further explanation

Pure substance can be any element or compound and is formed from one type of atom/molecule only

Meanwhile, the solution is included in a mixture consisting of 2 or more pure substance

Pure substance can be formed through a chemical process while the mixture is through a physical process

Mixture can be separated by physical processes into components of pure substance while pure substance cannot

The mixture itself consists of a homogeneous and heterogeneous solution

The mixture can be divided into a homogeneous mixture if the composition/ratio of each substance in the mixture is the same and a heterogeneous mixture if the ratio of the composition of the substances is not the same (can be varied) in each place.

Mixtures can also be divided into solutions, suspensions, and colloids based mainly on the size of the particles

Homogeneous mixture = Solution

Heterogeneous mixture = suspension, and

The mixture is located between suspension and solution = Colloid

How many grams of CU are required to replace 45.0 grams of silver nitrate?1Cu + 2AgNO3 -> 1Cu (No3)2 +2Ag

Answers

Molar mass Cu = 63.546 g/mol  and AgNO₃ = 169.87

1 Cu + 2 AgNO₃ -> 1 Cu (NO₃)₂ +2 Ag

63,546 -------- 2 * 169.87
? g Cu ------- 45.0 

Mass ( Cu ) = 45.0 * 63,546 / 2 * 169.87

Mass ( Cu ) = 2859,57 / 339,74

Mass = 8.4169 g of Cu

hope this helps!
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