answer.
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
MaRussiya [10]
2 years ago
5

7.7. A painter leans his back against a painted wall while looking into a 1m long mirror at the opposite end of a rectangular ro

om as shown in the given figure. How much of the painted wall can he see through the given mirror?
a. 1m
b. 2m
c. 12m
d. 6m

Chemistry
1 answer:
Karolina [17]2 years ago
8 0

Answer:

Correct answer is b) 2m

Explanation:

You might be interested in
Two students are working together to build two models. Both models will represent the molecular structure of sodium bicarbonate,
otez555 [7]

Answer:

Each student will need;

1 red jelly bean, 1 white jelly bean, 1 black jelly bean and 3 red jelly beans.

Explanation:

Sodium bicarbonate molecule, NaHCO3, or baking soda is composed of the following:

1 atom of sodium, Na;

1 atom of hydrogen, H;

1 atom of carbon, C, and

3 atoms of oxygen.

For each of the models to be built by the two students, these atoms are to be represented accordingly.

Since Red jelly beans represent sodium atoms (Na), white jelly beans represent hydrogen atoms (H), black jelly beans represent carbon atoms (C), and blue jelly beans represent oxygen atoms (O), each student will need;

1 red jelly bean, 1 white jelly bean, 1 black jelly bean and 3 red jelly beans.

A sample model is found in the attachment below:

4 0
2 years ago
Consider the following hypothetical reaction: 2 P + Q → 2 R + S The following mechanism is proposed for this reaction: P + P Q
aleksandr82 [10.1K]

Answer: the answer is option (D). k[P]²[Q]

Explanation:

first of all, let us consider the reaction from the question;

2P + Q → 2R + S

and the reaction mechanism for the above reaction given thus,

P + P ⇄ T     (fast)

Q + T → R + U    (slow)

U → R + S    (fast)

we would be applying the Rate law  to determine the mechanism.

The mechanism above is a three step process where the slowest step seen is the rate determining step. From this, we can see that this slow step involves an intermediate T as reactant and is expressed in terms of a starting substance P.

It is important to understand that laws based on experiment do not allow for intermediate concentration.  

The mechanism steps for the reactions in the question  are given below when we add them by cancelling the intermediates on the opposite side of the equations then we get the overall reaction equation.

adding this steps gives a final overall reaction reaction.

2P + Q ------------˃ 2R + S

Thus the rate equation is given as

Rate (R) = K[P]²[Q]

cheers, i hope this helps

3 0
2 years ago
Suppose total world energy consumption of fossil fuels, equal to 3×1017 kJ/yr, were to be obtained entirely by combustion of pet
Natasha_Volkova [10]

Answer:

it would definitely be wienerballs1977

Explanation:

fossil fuels x (3x1017kJ/yr) equals out to be wienerballs1977.

thx for the challenge !

3 0
2 years ago
Which of the following statements correctly illustrates the difference between weather and climate? A Tonight’s cool, breezy wea
Ratling [72]

i actually dont know what is it?

Explanation:

5 0
2 years ago
A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO3)2 with 50.0 mL of 0.50 M Co(NO3)2. Sodium hydroxide is added to the mi
vekshin1

Answer:

Cu(OH)₂ will precipitate first, with [OH⁻] = 2.97x10⁻¹⁰ M

Explanation:

The equilibriums that take place are:

Cu⁺² + 2OH⁻ ↔ Cu(OH)₂(s)   ksp = 2.2x10⁻²⁰ = [Cu⁺²]*[OH⁻]²

Co⁺² + 2OH⁻ ↔ Co(OH)₂(s)   ksp = 1.3x10⁻¹⁵ = [Co⁺²]*[OH⁻]²

Keep in mind that <em>the concentration of each ion is halved </em>because of the dilution when mixing the solutions.

For Cu⁺²:

2.2x10⁻²⁰ = [Cu⁺²]*[OH⁻]²

2.2x10⁻²⁰ = 0.25 M*[OH⁻]²

[OH⁻] = 2.97x10⁻¹⁰ M

For Co⁺²:

1.3x10⁻¹⁵ = [Co⁺²]*[OH⁻]²

1.3x10⁻¹⁵ = 0.25 M*[OH⁻]²

[OH⁻] = 7.21x10⁻⁸ M

<u>Because Copper requires less concentration of OH⁻ than Cobalt</u>, Cu(OH)₂ will precipitate first, with [OH⁻] = 2.97x10⁻¹⁰ M

3 0
2 years ago
Other questions:
  • How can you tell if a sample contains baking soda and cornstarch or baking powder?
    6·2 answers
  • A sample of hydrogen gas was collected over water at 21ºc and 685 mmhg. the volume of the container was 7.80 l. calculate the m
    10·1 answer
  • Consider the reaction: 2clf3(g) + 2nh3(g) → n2(g) + 6hf(g) + cl2(g) when calculating the δh°rxn, why is the δhf° for n2 not impo
    9·1 answer
  • Which best describes heat?
    7·2 answers
  • Suppose that 2.5 mmol n2 (g) occupies 42 cm3 at 300 k and expands isothermally to 600 cm3. calculate δgm in kj/mol for the proc
    14·1 answer
  • A 0.0200 M NaCl solution was formed when 38.0 grams of NaCl was dissolved in enough water. What was the total volume of the solu
    8·2 answers
  • Larisa pumps up a soccer ball until it has a gauge pressure of 61 kilopascals. The volume of the ball is 5.2 liters. The air tem
    15·1 answer
  • A 3.0-L sample of helium was placed in container fitted with a porous membrane. Half of the helium effused through the membrane
    11·1 answer
  • Aluminum has a specific heat of 0.902 j/gC. How much heat is lost when a piece of aluminum with a mass of 23.984 g cools from a
    6·1 answer
  • How many milliliters of a 0.8 M solution of citric acid would be needed to react with 15 grams of baking soda? Show your work.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!