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
Travka [436]
3 years ago
11

URGENT

Chemistry
1 answer:
pantera1 [17]3 years ago
4 0

Answer:

Option A. Double Replacement

Explanation:

A double displacement reaction is a kind of reaction in which there is an exchange of the ions of the two reactants to form a different products. In the equation, K in KOH displaces H in H3PO4 to form K3PO4 and also, the H combines with OH to form water.

H3PO4+3KOH -> K3PO4+3H20

You might be interested in
A chemist needs to know the mass of a sample of to significant digits. She puts the sample on a digital scale. This is what the
lys-0071 [83]

Answer:

No solution

Explanation:

This is only 4 sig digits  

8 0
2 years ago
A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing air under high pressure in a spheric
Luba_88 [7]

Complete Question

A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing air under high pressure in a spherical air tank that measures 74.0 wide. The biologist estimates she will need 2600 L of air for the dive. Calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. Write your answer in atmospheres. Round your answer to significant digits.

Answer:

The pressure required is P_2= 12.2 \ atm

Explanation:

Generally the volume of a sphere is mathematically denoted as

             V_s = \frac{4}{3} * \pi r^3

Substituting r =  \frac{d}{2} = \frac{74}{2} = 37cm

          V_s = \frac{4}{3} * 3.42 * (37)^2

               V_s = 2.121746 *10^5 cm^3

Converting to Liters

               V_s = \frac{2.121746 *10^5}{1000}

                V_s= 212.1746L

Assume that the pressure at which the air is given to the diver is 1 atm when the air was occupying a volume of 2600L

So

From Charles law

               P_1V_1 = P_2 V_s

Substituting  V_1 =2600 L ,   P_1 = 1 atm , V_s  =212.1746L , and making P_2 the subject we have

                 P_2 = \frac{P_1 * V_1}{V_s}

                     = \frac{1 * 2600}{212.1746}

                    P_2= 12.2 atm

               

6 0
3 years ago
It has been raining for several days. Overnight, the temperature dropped below the freezing point. Travel is now hazardous due t
Art [367]

Hurricane, Typhoon, Or Severe Thunderstorm/Storm. The Signs Described show evidence of any of the situations provided.


3 0
3 years ago
Enumere por lo menos 5 objetos que antiguamente se hacían con otro material y en la actualidad se hacen con un polímero. Identif
Kay [80]

Translation: List at least 5 objects that were formerly made from another material and are now made from a polymer. Identify what polymer it is

Answer:

Five object now replaced with polymers

1) automobile body parts. (polypropylene, polyurethane and PVC)

2)TV cabinets. (polystyrene polymer)

3) composites for golf clubs. (carbon fibre reinforced polymer CFRP)

4) fibers for clothing and carpet. (acrylic and nylon)

5) foams for coffee cups (polystyrene)

4 0
4 years ago
A coin collector has a bag of 50 pennies. What is weighted average of a penny in the sample according to the data?
Lisa [10]

The weighted average of a penny is = 67.9g

<h3>Calculation of average weight</h3>

The sample of penny for pre 1982 is a total of = 18 pennies.

The mass of each penny for pre 1982 = 3.1

Therefore the total weight for penny for pre 1982

= 18×3.1

= 55.8

The sample of penny for post 1982 is a total of = 32 pennies.

The mass of each penny for post 1982 = 2.5

Therefore the total weight for penny for post 1982

=32×2.5

= 80

The weighted average

= 55.8+80/2

= 135.8/2

= 67.9g

learn more about mass here:

brainly.com/question/14156113

#SPJ1

7 0
2 years ago
Other questions:
  • A _____ is a crack in Earth's crust where lava comes out. A. crater B. fissure C. caldera D. volcano
    10·2 answers
  • Calculate the number of milliliters of 0.587 M NaOH required to precipitate all of the Ni2+ ions in 163 mL of 0.445 M NiBr2 solu
    9·1 answer
  • Cosmic microwave background radiation found uniformly spread throughout the universe is supposed to be _____.
    12·2 answers
  • Explain, using the kinetic theory, what happens<br> to the particles in oxygen as it is cooled down,
    13·1 answer
  • Na2SO4 is dissolved in water to make 450mL of a 0.2250 M solution. What is the molar mass of Na2SO4?
    5·1 answer
  • Hellllpppppppp helppppppppp
    8·1 answer
  • If a cell inside of an organism were unable to exchange food, water, and other materials with its environment, what would happen
    5·1 answer
  • Which of the following is the correct name for CC14?
    11·1 answer
  • Please follow me<br><br><br>What is science ?​
    10·1 answer
  • Please help! Will give brainiest for best answer! Please Explain how you got there as well. Thanks.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!