1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lesechka [4]
2 years ago
5

How many grams of potassium carbonate are needed to make 300ml of a 4.5M solution?

Chemistry
1 answer:
kenny6666 [7]2 years ago
4 0

Answer:

186.3g

Explanation:

4.5moles of K₂CO₃  is in 1000ml

? moles of K₂CO₃ is in 300 ml

(4.5 × 300)/ 1000 = 1.35 moles of K₂CO₃

1 mole of K₂CO₃ = (39 × 2) + 12 + (16 × 3) = 78 + 12 + 48 = 138g

1.35 moles of K₂CO₃  = ?

= (1.35 × 138)/1 = 186.3g

You might be interested in
Convert 12.3 centimeters to meters.<br> (1 m = 100 cm)
Contact [7]

0.123

Explanation:

That’s the answer

6 0
2 years ago
Read 2 more answers
if we react 117 grams of sodium chloride with 340 grams of silver nitrate in a complete reaction what will be the mass, in grams
gavmur [86]

y’all i have this same question someone please help

3 0
2 years ago
Which element, when combined with Iodine, would most likely form an ionic compound?
uranmaximum [27]

In an ionic compound the atoms are linked via ionic bonds. These are formed by the transfer of electrons from one atom to the other. The atom that loses electrons gains a positive charge whereas the atom that accepts electrons gains a negative. This happens in accordance with the octet rule wherein each atom is surrounded by 8 electrons

In the given example:

The valence electron configuration of Iodine (I) = 5s²5p⁵

It needs only one electron to complete its octet.

In the given options:

K = 4s¹

C = 2s²2p²

Cl = 3s²3p⁵

P = 3s²3p³

Thus K can donate its valence electron to Iodine. As a result K, will gain a stable noble gas configuration of argon while iodine would gain an octet. This would also balance the charges as K⁺I⁻ creating a neutral molecule.

Ans: Potassium (K)

4 0
3 years ago
Heating curve shows temperature verses energy gain. Which parts of the curve represent a gain in potential energy?
Brilliant_brown [7]

Answer:

Those two horizontal lines.

Explanation:

Hello there!

In this case, when focusing on these heating curves, it is important to say they tend to have two constant-temperature sections and three variable-temperature sections. Thus, from lower to higher temperature, the first constant-temperature section corresponds to melting and the second one vaporization, whereas the three variable-temperature sections correspond to the heating of the solid until melting, the liquid until vaporization and the gas until the critical point.

In such a way, we infer that the boxes referred to constant temperature are referred to a gain in potential energy, that is, the two horizontal lines.

Regards!

6 0
2 years ago
Which field of science studies the composition and structure of matter?
masha68 [24]
The answer is chemistry
6 0
2 years ago
Read 2 more answers
Other questions:
  • How can etymologies help you know the meanings of scientific terms ?
    12·2 answers
  • How many moles of O2 are required to generate 18 moles of H2O in the given reaction?
    7·2 answers
  • Why Ammonia is nut dried by passing through concentrated H2SO4.​
    11·1 answer
  • To make a 2 M solution of calcium chloride (CaCl2), you would place how many grams of CaCl2 into a container and then add how mu
    9·1 answer
  • Solid at room temperature. They are used in making computers and electronic devices. Have properties of both metals and nonmetal
    7·2 answers
  • The goal of this lesson:
    15·1 answer
  • At 300.0 K and 0.987 atm pressure, what will be the volume of 2.30 mol of Ne?
    5·1 answer
  • How do ethics affect scientific research
    6·1 answer
  • 1. How many MOLECULES are contained in 80.0 grams of sodium hydroxide?
    9·1 answer
  • Which type of electromagnetic waves are dangerous enough to be used to kill cancerous cells?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!