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
aev [14]
2 years ago
11

Are the triangles shown below similar? Please explain why or why not.

Mathematics
2 answers:
erica [24]2 years ago
5 0

Yes

Angles r congruent

ikadub [295]2 years ago
5 0
Yes, they are the same shape but one is bigger but the my are the same size if you think about it
You might be interested in
When electricity (the flow of electrons) is passed through a solution, it causes an oxidation-reduction (redox) reaction to occu
oee [108]

Answer:

a. 135 g

b. 60.6 min

Step-by-step explanation:

a. What mass of Cu(s) is electroplated by running 28.5 A of current through a Cu2+ (aq) solution for 4.00 h? Express your answer to three significant figures and include the appropriate units.

The chemical equation for the reaction is given below

Cu²⁺(aq) + 2e⁻ → Cu(s)

We find the number of moles of Cu that are deposited from

nF = It where n = number of moles of electrons, F = Faraday's constant = 96485 C/mol, I = current = 28.5 A and t = time = 4.00 h = 4.00 × 60 min/h × 60 s/min = ‭14,400‬ s

So, n = It/F = 28.5 A × ‭14,400‬ s/96485 C/mol = ‭410,400‬ C/96485 C/mol = 4.254 mol

Since 2 moles of electrons deposits 1 mol of Cu, then 4.254 mol of electrons deposits 4.254 mol × 1 mol of Cu/2 mol = 2.127 mol of Cu

Now, number of moles of Cu = n' = m/M where m = mass of copper and M = molar mass of Cu = 63.546 g/mol

So, m = n'M

= 2.127 mol × 63.546 g/mol

= 135.15 g

≅ 135 g to 3 significant figures

b. How many minutes will it take to electroplate 37.1 g of gold by running 5.00 A of current through a solution of Au+(aq)?

The chemical equation for the reaction is given below

Au⁺(aq) + e⁻ → Au(s)

We need to find the number of moles of Au in 37.1 g

So, number of moles of Au = n = m/M where m = mass of gold = 37.1 g and M = molar mass of Au = 196.97 g/mol

So, n = m/M = 37.1 g/196.97 g/mol = 0.188 mol

Since 1 mol of Au is deposited  by 1 moles of electrons, then 0.188 mol of Au deposits 0.188 mol of Au × 1 mol of electrons/1 mol of Au = 0.188 mol of electrons

We find the time it takes to deposit 0.188 mol of electrons that are deposited from

nF = It where n = number of moles of electrons, F = Faraday's constant = 96485 C/mol, I = current = 5.00 A and t = time

So, t = nF/It

= 0.188 mol × 96485 C/mol ÷ 5.00 A

= ‭18173.30‬ C/5.00 A

= 3634.66 s

= 3634.66 s × 1min/60 s

= 60.58 min

≅ 60.6 min to 3 significant figures

6 0
3 years ago
PLZ HELP ME I will give u 10 points PLZZ HELP ME
zhannawk [14.2K]

Answer:

1000

7/100

Step-by-step explanation:

10×10×10is 100

8 0
2 years ago
It would take Marco 6 hours to paint a fence by himself. It would take Jaylyn 5 hours to paint the same fence by herself. Marco
Lyrx [107]

<u>Answer</u>

Time taken to paint the fence by Marco  and Jaylyn is 2.72 hours

Heading can be given to this is work per hour

<u>Explanation</u>

Macro 6 hours to paint fence by himself

Therefore his 1 hour work = 1/6

Jaylyn 5 hours to paint the same fence by herself

Therefore 1 hour work of  Jaylyn  = 1/5

Together 1 hour work = 1/6 + 1/5 = 11/30

Therefore time taken to paint the fence together by them = 30/11 = 2.72 hours

4 0
3 years ago
Read 2 more answers
Without performing the calculation, estimate which expression is larger. Explain how you know
Naddik [55]

Answer:

4 × 10¹⁰ > 2 × 10⁵

Step-by-step explanation:

Given that,

Two numbers in scientific notation.

First number: 4 × 10¹⁰

Second number: 2 × 10⁵

To compare scientific notation number.

First check the exponent of 10

If exponent is larger then number becomes larger.

First number exponent is 10 and second number exponent if 5

10 > 5

Therefore,

4 × 10¹⁰ > 2 × 10⁵

6 0
2 years ago
Easy question need fast please
deff fn [24]

Answer:

I cant see the question

Step-by-step explanation:

..................

6 0
2 years ago
Other questions:
  • Ellen draws two plane figures.one of the figures has 3 more angles than the other figure.what shapes could she have drawn?
    11·1 answer
  • Write the sum of the numbers as the product of their GCF and another sum. Show your work. Can you guys help me please and explai
    6·1 answer
  • A parent purchased a dictionary for $13.50 and a pack of printer paper for $4.50. The sales tax rate was 4%. What was the total
    13·1 answer
  • The area of a rectangle or a 48 square inches the length is 8 inches what is the measure of its width
    7·2 answers
  • Which property is demonstrated <br> 9 * 3 * 4 = 4 * 3 * 9
    7·1 answer
  • Write me a paragraph proof.
    11·1 answer
  • Which information could he have used to determine this?
    8·2 answers
  • Tbh ive fogotten how to do all of these so plz helpppppppppp
    8·1 answer
  • Simplify the expression below:<br><br> p ÷ (-5) ≥ - 9<br><br> ⮜|-------|--------|➤
    15·2 answers
  • 40x^-4 y^-6/(over)10x^-5 y^5
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!