CHEMISTRY HIGH SCHOOL

In the double replacement reaction between Na2SO4 (aq) and BaCl2 (aq), will a precipitate form?No. This reaction produces no insoluble products.

Yes. The NaCl will precipitate.

Yes. The BaSO4 will precipitate.

Yes. Both the NaCl and the BaSO4 will precipitate.

Answers

Answer 1

Answer:

Yes. The BaSO₄ will precipitate in this type of double replacement reaction.

What is Double replacement reaction?

This is a type of reaction in which two reactants exchange ions to form two new compounds.

Na₂SO₄ (aq) + BaCl₂ (aq) ⇒ NaCl(aq)+ BaSO₄(s)

The precipitate which will be seen at the bottom of the reaction flask is solid BaSO₄.

Read more about Double replacement reaction here brainly.com/question/5082638

Answer 2

Answer:

Answer: The correct answer is Yes, $BaSO_4$ will precipitate.

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

$AB+CD\rightarrow AD+CB$

Precipitate is defined as the insoluble salt which emerges when two different solutions are mixed together. It settles down at the bottom of the flask after some time.

The chemical equation for the reaction of sodium sulfate and barium chloride follows:

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

Barium sulfate settles down in the reaction flask and is considered as a precipitate.

Hence, the correct answer is Yes, $BaSO_4$ will precipitate.

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Which element will chemically combine with fluorine to form a salt?a. carbonb. lithiumc. neond. oxygen
A drop of vinegar ( a weak acid ) is placed on a sample of each of the materials below. Which will show the most active reaction? A. glassB. marbleC. copperD. steel
3Pb(s) + 2H3PO4(l) →

When are tides highest?

Answers

A neap tide is the highest tide there is, this is due to the position of the moon,since the moon and sometimes the earth are what cause the tides in the ocean.

Liquids and solids are left out of the equilibrium constant expression because their concentrations remain constant during reactions. What is the molarity concentration of liquid water at 25.0 LaTeX: ^\circ ∘C given that its density is 0.997 g/mL at that temperature? a.23.5 M
b.0.997 M
c.0.180 M
d.0.156 M
e.55.3 M

Answers

Answer:

55.3 M

Explanation:

Given temperature = 25°C

Density = 0.997 g/mL

Based on density the mass of water per L = 997 grams

The molar mass of water = 18

The moles of water = $(mass)/(molarmass)=(997)/(18)=55.3$

The molarity is defined as the moles of water per litre.

The moles = 55.3

Volume = 1 L

So molarity = 55.3 /1 = 55.3 M

Compared to H2S, the higher boiling point of H2O is due to the1.
greater molecular size of water
2.
stronger hydrogen bonding in water
3.
higher molarity of water
4.
larger gram-formula mass of water

Answers

$\rm H_2O$ has higher boiling point than $\rm H_2S$ , as there has been stronger hydrogen bonding in $\rm H_2O$ . Thus, option 2 is correct.

The boiling point has been the temperature at which the liquid has been converted to the gaseous form. The boiling point has been based on the intemolecular attractions between the atoms.

Higher boiling point

Based on the intermolecular interactions, the compound with higher intermolecular force required more energy to break the bond and change the state, and thus have high boiling point.

The hydrogen sulfide and water has hydrogen bonding. The hydrogen bonding has been based on the electronegativity of the atom involved. The more electronegative atom, stronger will be hydrogen bonding and thereby higher boiling point.

In $\rm H_2S$ and $\rm H_2O$ , the oxygen has been more electronegative than sulfur and thus results in stronger hydrogen bonding.

Thus, $\rm H_2O$ has higher boiling point than $\rm H_2S$ , as there has been stronger hydrogen bonding in $\rm H_2O$ . Thus, option 2 is correct.

Learn more about boiling point here:

brainly.com/question/2153588

Answer:

2, stronger hydrogen bonding

Explanation:

The first major source of oxygen gas was _____.a. volcanic outgassing
b. meteorite impacts
c. cyanobacteria
d. banded iron formations

Answers

The first major source of life on Earth was c. cyanobacteria. These organisms produce food by using energy from the sun; they are photosynthetic organisms. Over millions of years these organisms used CO2 in the air for photosynthesis and released oxygen as a byproduct. Over time oxygen concentrations rose high enough to support life.

The word that best fits in the blank in the sentence, "The first major source of oxygen gas was _____" is cyanobacteria. Thus, the answer is letter C. Cyanobacteria are blue-green algae and they are believed to have caused the "great Oxidation Event".

Concentrated nitric acid used in laboratory is 68 % nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g mL-1?

Answers

68% by mass = 68 / 100 => 0.68

Density = 1.504 g/mL⁻¹

Molar mass HNO₃ =63.01 g/mol

M = 1000 * T* D / mm

M = 1000 * 0.68 * 1.504 / 63.01

M = 1022.72 / 63.01

M = 16.23 mol/L

hope this helps!

The actual size of a wood louse is 0.4mm but Robert drew his 5mm. What is the magnification?Please answer QUICK I ain’t got much time

I’ll give brainiest if you answer in the next 15 mins

Answers

Final answer:

The magnification of Robert's drawing of a wood louse can be obtained by dividing the size of the drawing (5mm) by the actual size of the wood louse (0.4mm). This gives a magnification of 12.5 times.

Explanation:

The magnification of a drawing can be calculated using the method 'Image size/Actual size'. In this question, Robert's drawing is of a size 5mm while the actual size of the wood louse is 0.4mm. Substituting these values into the formula, you would get 5mm/0.4mm which equates to a magnification of 12.5 times.

The magnification of Robert's drawing of a wood louse can be calculated by dividing the size of the drawing by the actual size, resulting in a magnification of 12.5.