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
olga2289 [7]
3 years ago
13

Help pls!!

Chemistry
1 answer:
ankoles [38]3 years ago
7 0

Answer:

C, physical change

Explanation:

take a look at the equation. Next to each form of water do you see the little (g) and (l)? These represent the state of matter the water is in. So, the water is going from a gas to a liquid. The chemical compound is the same so its a physical change, not chemical, and it is reversible. You could change the liquid water back to the gas through evaporation. Endothermic has literally nothing to do with this equation so you can easily eliminate that answer choice.

You might be interested in
A sound wave from a jackhammer travels through a section of concrete with a fixed frequency. At the concrete's boundary is mud.
Ira Lisetskai [31]

Answer:

It might be too late now, but the correct answer for the question is B.

Explanation:

According to the graph you can see when it hit the boundary of the mud it curved downward making the direction change; which then the mud probably had a hollow shell, where the speed was moving much faster.

6 0
3 years ago
Read 2 more answers
What is the molarity of 3.2 moles of magnesium chloride in 1.5 L of water
diamong [38]

Answer:4.8

Explanation:

5 0
3 years ago
Object A at 40ºC and object B at 80ºC are placed in contact with each other. Which statement describes the heat flow between the
Arada [10]
By the second law of thermodynamics:
Heat can not spontaneously flow from cold regions to hot regions without external work being performed on a system.
Heat transfer is the passage of thermal energy from a hot ( t B = 80° C ) to a colder body ( t A = 40° C ). 
Answer:  B ) Heat flows from object B to object A.
6 0
3 years ago
Read 2 more answers
A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L.
ANTONII [103]

Answer:

b

Explanation:

answered it correctly

3 0
3 years ago
Read 2 more answers
How many seconds does it take a race horse to run six furlongs at 40.7 miles per hour if: I furlong = 40 rods; 5.5 yards = 1 rod
lana [24]

Distance traveled by the race horse=6 furlongs

Converting the distance from furlongs to rods: 40 rods =1 furlong

6 furlongs*\frac{40rods}{1furlong} =240rods

Converting the distance from rods to yards, feet and miles: 5.5 yards = 1 rod, 3foot =1 yard, 1 mile = 5280 feet.

240rods*\frac{5.5yards}{1rod}*\frac{3foot}{1yard}*\frac{1mi}{5280feet}=0.75mi

The given speed of race horse = 40.7mi/hr

Calculating the time required:

0.75mi*\frac{1hr}{40.7mi}*\frac{60min}{1hr}*\frac{60s}{1min}= 66.34s

Therefore, 66.34 s is required for a race horse to run six furlongs at 40.7 miles per hour.

8 0
3 years ago
Other questions:
  • ithium metal reacts with water to give lithium hydroxide and hydrogen gas. if 75.5 mL of hydrogen gas is produce at STP, what is
    10·2 answers
  • Antarctica, which is mostly ice, is much colder than the arctic, which is a mixture of ice and water. why?
    5·1 answer
  • Why does a solution of a weak base and its conjugate acid act as a better buffer than does a solution?
    6·1 answer
  • How many moles of oxygen gas (O2) are in a 2.50 L container at standard temperature and pressure?
    11·1 answer
  • Scientists use scientific notation to represent very small or very large numbers because this notation increases the
    12·2 answers
  • 1 ______ energy is stored in the zinc rod, the copper rod, and their solution
    12·1 answer
  • 5.60 g of an unknown gas at STP fills a 500 mL flask. What is the molar mass of the gas
    6·1 answer
  • PLS HELP ASAP. list 5 chemicals that contribute to ozone layer depletion?​
    8·1 answer
  • Please help! ill make a free point question and brainliest if you answer this right!
    12·2 answers
  • The measure of the bending of ray of light passing from one medium in another
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!