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
yawa3891 [41]
2 years ago
6

In a science lab, Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles t

o the bottom. Which statement below describes what happened? a A physical change occurred, a gas and precipitate was produced b A physical change occurred, only a gas was produced c A chemical change occurred, only a gas was produced d A chemical change occurred, a gas and precipitate was produced
Chemistry
1 answer:
Greeley [361]2 years ago
5 0

Answer:

A chemical change occurred, a gas and precipitate was produced

Explanation:

From the question , we are informed of science lab, where Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom.

In this case the change that took place is chemical change ( is one where new product are formed after two substance react) the bubbles that is produced signify the presence of gas in the product, white solid formed is reffered to as a precipitate( which is reffered to as solid that is been formed from a particular solution).

You might be interested in
Glacier and erosion in a sentence
Ilya [14]
A glasier can cause an eroision miles away from eachother
6 0
3 years ago
A chemist measures the enthalpy change ?H during the following reaction: Fe (s) + 2HCl (g) ? FeCl2 (s) + H2 (g) =?H?157.kJ Use t
erik [133]

Correct Question:

A chemist measures the enthalpy change ΔH during the following reaction: Fe(s) + 2HCl(g)-->FeCl2(s) + H2 ΔH=-157.0 kJ. Use this information to complete the table below. Round each of your answers to the nearest kJ/mol

Answer:

-314 kJ

+628 kJ

+157 kJ

Explanation:

The enthalpy change of a reaction measures the amount of heat that is lost or gained by it. If ΔH >0 the heat is gained, and the reaction is called endothermic, if ΔH<0, the heat is lost, and the reaction is called exothermic.

If the reaction is inverted, the value of ΔH is inverted too (the opposite endothermic reaction is exothermic), and if the reaction is multiplied by a constant, ΔH will be multiplied by it too.

1) 2Fe(s) + 4HCl --> 2FeCl2(s) + 2H2(g)

This reaction is the product of the given reaction by 2, so

ΔH = 2*(-157) = -314 kJ

2) 4FeCl2(s) + 4H2(g) --> 4Fe(s) + 8HCl(g)

This reaction is the inverted reaction given multiplied by 4, so

ΔH = 4*(157) = +628 kJ

3) FeCl2(s) + H2(g) --> Fe(s) + 2HCl

This reaction is the inverted reaction given, so

ΔH = +157 kJ

4 0
3 years ago
Is ineffective collision's the answer? Please correct me if not, thank you. :)
AleksAgata [21]
Yes! You're correct! Hope this helps! :D
6 0
3 years ago
The compound MgF is an example of a(n)
melamori03 [73]
It is metallic compound
7 0
3 years ago
Read 2 more answers
V1=450 mL V2 =? T1=45oC= 318.15 K T2= ​
Umnica [9.8K]

Answer:

onypointd

Explanation:

5 0
3 years ago
Other questions:
  • Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K at a rate of 0.5 kg/s and leaves at 600 kPa and 450 K. Neglec
    5·1 answer
  • I analyze one atom of carbon in a rock and then one atom of carbon from one of my skin cells. Explain the differences I might se
    15·1 answer
  • Do all systems have energy?
    5·1 answer
  • Which of the following compounds share electrons? NaCl CO CsF KBr
    8·1 answer
  • Which response includes all the following that are properties of most metals, and no other properties?
    14·1 answer
  • Consider the reaction below 2SO2(g) + O2(g) ⇌ 2SO3(g) At 1000 K the equilibrium pressures of the three gases in one mixture were
    13·1 answer
  • make a 450 gram solution with the mass by mass concentration of 7% how much salt and water do you need to mix​
    13·1 answer
  • Please everyone do this and send me​
    12·1 answer
  • What volume would 75.0g of oxygen gas occupy
    12·1 answer
  • What is a water cycle​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!