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2 years ago

Which most likely indicates a chemical change has occurred?

Chemistry

1 answer:

leonid [27]2 years ago

5 0

Answer:

A green liquid becoming a red liquid.

Explanation:

If the color change is unexpected it is a chemical change.

(If 2 clear liquids make a black, red, green, ect color it is a chemical change)

no normal color mix makes green turn red.

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How many grams of barium sulfate are produced if 25.34 mL of 0.113 M BaCl2 completely react given the reaction: BaCl2 (aq) + Na2

jeyben [28]

<u>Answer:</u> The amount of barium sulfate produced in the given reaction is 0.667 grams.

<u>Explanation:</u>

To calculate the number of moles from molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Molarity of barium chloride = 0.113 M

Volume of barium chloride = 25.34 mL = 0.02534 L (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$0.113mol/L=\frac{\text{Moles of barium chloride}}{0.02534L}\\\\\text{Moles of barium chloride}=0.00286mol$

For the given chemical reaction:

$BaCl_2(aq.)+Na_2SO_4(aq.)\rightarrow BaSO_4(s)+2NaCl(aq.)$

By Stoichiometry of the reaction:

1 mole of barium chloride is producing 1 mole of barium sulfate.

So, 0.00286 moles of barium chloride will produce = $\frac{1}{1}\times 0.00286mol=0.00286mol$ of barium sulfate.

Now, to calculate the mass of barium sulfate, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of barium sulfate = 233.38 g/mol

Moles of barium sulfate = 0.00286 moles

Putting values in above equation, we get:

$0.00286mol=\frac{\text{Mass of barium sulfate}}{233.38g/mol}\\\\\text{Mass of barium sulfate}=0.667g$

Hence, the amount of barium sulfate produced in the given reaction is 0.667 grams

4 0

4 years ago

Using the Periodic Table, predict which elements will have similar chemical properties or reactivity

tekilochka [14]

Answer:

Elements in the same vertical column on the periodic table will have similar chemical properties and behave similarly in chemical reactions. These vertical columns can also be called groups/families.

Explanation:

6 0

3 years ago

How many molecules are in 0.25 moles of CH4

Brums [2.3K]

The base gram of the compound is 16.042

To find the new amount of grams, you need to multiply the amount of moles by the the base grams

16.042*.25=4.01

So one fourth of the compound is 4.01 grams of Carbon tetrahydride.

6 0

3 years ago

Strong acids are corrosive in nature

Yuri [45]

Yes. Strong bases are too. In fact, they’re more dangerous to your skin than acids.

8 0

3 years ago

A question on Reactants.

Natasha2012 [34]

Answer:

b lithium and water

Explanation:

8 0

3 years ago