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
weeeeeb [17]
4 years ago
8

In a group assignment, students are required to fill 10 beakers with 0.720 M CaCl2. If the molar mass of CaCl2 is 110.98 g/mol a

nd each beaker must have 250. mL of solution, what mass of CaCl2 would be used? 3.13 g 38.5 g 200 g 617 g
Chemistry
2 answers:
8_murik_8 [283]4 years ago
8 0
The answer is 200 g.

If the molar mass of CaCl2 is 110.98 g/mol, this means there are 110.98 g in 1 L of 1 M solution.
Let's find how many g of CaCl2 are present in 0.720 M.
110.98 g : 1 M = x : 0.720 M
x = 110.98 g * 0.720 M : 1 M 
x = 79.90 g

So there are 79.90 g in 0.720 M. In other words, in 1 L of 0.720 M solution there will be  79.90 g.

Now, we need to prepare ten beakers with 250 mL of solutions:
10 * 250 mL = 2500 mL = 2.5 L

79.90 g : 1 L = x : 2.5 L
x = 79.90 g * 2.5 L : 1 L
x = 199.75 g ≈ 200 g
inn [45]4 years ago
8 0

Answer: C. 200g

Explanation: Just took the test, it's correct.

You might be interested in
A chemistry student combines 23.0 grams of sodium and 71.0 grams of chloride to form sodium chloride. According to the law of co
Diano4ka-milaya [45]

Answer:

94.0 g.

Explanation:

Hello!

In this case, since the lay of conservation of mass states that energy cannot be neither created nor destroyed, during a chemical reaction it is seen that the reactions undergo a change by which bonds can be broken or formed depending on the case. Thus, for the formation of sodium chloride we evidence the formation of the Na-Cl bond which means sodium is combined with chlorine according to the following chemical reaction:

2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)

It means that the reuslting mass of product is:

m_{NaCl}=23.0+71.0g=94.0g

Best regards!

8 0
3 years ago
Which of these compounds is the odd<br> one out? * <br> (1 Point)<br> H2O<br> NaBr<br> NH₃<br> HCI
pogonyaev
The odd one out is NaBr
4 0
3 years ago
What element is found in liver and is needed to prevent anemia or tired blood.
DochEvi [55]


The element found in the liver that helps prevent anemia is iron.

Iron is an essential element for blood production. Close to 70% of the body's iron is found in the red blood cells. In the red blood cells it is a vital ingredient of hemoglobin, the red pigment that gives blood its red color. In the muscle cells, iron is found as myoglobin.

Iron is stored mostly in the liver as ferritin or hemosiderin.

When iron stores are finished or exhausted, the condition is called iron depletion. When the shortage of iron is severe, it results in a condition known as iron deficiency anemia whereby the red blood cells do not have enough hemoglobin.



3 0
3 years ago
Identifying a trend in temperature change over time
stiv31 [10]

Answer:

More than three decade the temperature of earth is increasing equally by the rate of 0.8 Celsius (1.4 Fahrenheit). It is going to be very harmful for the human being as well animals.  The global warming is the main reason and hole in the ozone layer had been the cause of increasing the temperature of the earth. Humans are also involved in cause in temperature of earth by cutting forests and making land suitable for residence and not planting more trees instead of the cut trees.

7 0
4 years ago
Read 2 more answers
Please help me with this science
svlad2 [7]
You didn't ask a question just to let you know
6 0
3 years ago
Other questions:
  • What is the mass of a cube measuring 3cm on each side that had a density of 8.1g/cm3?
    12·1 answer
  • Which activity involves a product made from petroleum jelly a.) eating fresh fruit for a snack b.) walking to school c.) see you
    15·1 answer
  • Force F with arrow = (9.0 N)i hat − (9.0 N)k acts on a pebble with position vector r with arrow = (0.90 m)j − (1.2 m)k relative
    5·1 answer
  • Some scientific evidence suggests that our universe is ever-expanding from a hot and dense initial state. Briefly describe at le
    15·2 answers
  • Can carbon atoms share electron with four hydrogen atoms to form a methane molecule? Explain.
    11·1 answer
  • In which of the three states of matter are the particles moving at the greatest speed?
    8·1 answer
  • 454 grams of isomaltitol, C12H24O11, was combusted in a furnace completely in an excess oxygen. The products of this reaction ar
    6·1 answer
  • Is nitric acid a strong or weak acid. Explain your answer.
    13·1 answer
  • What is your favorite household chemical reaction​
    10·2 answers
  • How do lone pairs of electrons influence the structure of molecules
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!