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
Rasek [7]
1 year ago
12

A chemist combined 0.440 L of an unknown calcium solution with an excess of ammonium chromate. This resulted in the precipitatio

n of calcium chromate. The mass of the precipitate was 346.7 mg. What was the molar concentration of Ca2 in the original sample
Chemistry
1 answer:
Rina8888 [55]1 year ago
6 0

The concentration of the original calcium ions is 0.005 M

<h3>What is concentration?</h3>

The term concentration has to do with the amount of substance in solution. We know that the concentration can be measured in a lot of units such as mole/litre, grams per litre, percentage and so on.

As such we have the equation;

Ca^2+(aq) + (NH4)2CrO4(aq) --------> CaCrO4(s) + 2NH4^+(aq)

Number of moles of the precipitate = 346.7 * 10^-3 g/156 g/mol

= 0.0022 moles

Now;

1 mole of Ca^2+ produces 1 mole of CaCrO4 hence 0.0022 moles of CaCrO4 was produced by  0.0022 moles of CaCrO4.

Given that the volume of the solution is  0.440 L, the concentration of the solution is;   0.0022 moles/0.440 L

= 0.005 M

Learn more about molarity:brainly.com/question/8732513

#SPJ1

You might be interested in
Which of the following is an example of energy causing motion?
Verdich [7]

Answer:

the answer is c

Explanation:

8 0
3 years ago
Read 2 more answers
Noz at
Ne4ueva [31]

Answer:

<h2> ncjchchdgshdihdyshfjgjfjfjfjfjfjfjcjfjfjcn jivk kvi</h2>
4 0
3 years ago
How did humans and animals adapt/survive to hurricane Katrina? AND Give examples of organisms that could not adapt/survive? PLS
guajiro [1.7K]
Some organisms that could not survive where cats, dogs, birds, horses, fish, cows, every animal that was in hurricane Katrina was affected by it. Some of these animals were able to survive and others were rescued from near death.
Most of the animals could not adapt to this change because they are not used to this type of change. The water was too strong for the fish and when the water brought the fish into any water/sea animal there was also medal because the water in through peoples houses (pretty much the man-made stuff that's not meant for sea is killing the animals in the water). 
Any animal that was left behind was affected. The animals could not adapt to this change they have never experienced something that tragic before, how they survived? Well, the animals that survived was mainly because of there natural instinct, before an earthquake or anything hits there are many animals that can sense the storm coming before it even hits and in this situation, the animal could, wake up, run to owner, flee, run to higher ground, and if they cant sense it. They see whats going on around them and then they know something is wrong.
8 0
3 years ago
Read 2 more answers
Can someone help me with this question?
Softa [21]

Answer:

5 , I think. sorry if its wrong

8 0
3 years ago
a diatomic element has six bonding electrons, six non-bonding electrons, and 2 anti-bonding electrons. what is the bond order? g
Deffense [45]

The bond order of a diatomic element with  six bonding electrons, six non-bonding electrons, and 2 anti-bonding electrons is 2 whose formula is( bonding electrons-anti bonding electrons)/2.

<h3>What is an element?</h3>

An element  is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

Learn more about element,here:

brainly.com/question/14347616

#SPJ2

7 0
1 year ago
Read 2 more answers
Other questions:
  • Nitrobenzene contains 5 hydrogen atoms, 6 carbon atoms, 2 oxygen atoms, and 1 nitrogen atom. what is the chemical formula for ni
    8·2 answers
  • Which compounds yield hydrogen ions as the only positive ions in an aqueous solution?
    13·2 answers
  • What is the enthalpy for the reaction represented in the following energy diagram?
    6·1 answer
  • What term refers to columns of elements?
    14·1 answer
  • A 1.0mol sample of which of the following compounds has the greatest mass?
    9·1 answer
  • 20.0 g of Nitrogen is produced when oxygen gas reacts with NO gas. 29.8 L of oxygen is required at STP to produce this 20.0 g of
    11·1 answer
  • Calculate the number of moles of 2 g hydrogen gas
    8·1 answer
  • What scientist use the scientific method to determine if cold was a substance?
    15·1 answer
  • A compound is made of 49.31% C, 43.79% 0 and the rest hydrogen. The molar
    9·1 answer
  • Consider the reaction below. 2al2o3 → 4al 3o2 what is the mole ratio of oxygen to aluminum? o2:al = :4
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!