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
matrenka [14]
3 years ago
13

If the radius of a coin is 14 cm, What is surface area?

Chemistry
1 answer:
antiseptic1488 [7]3 years ago
5 0
Let R=radius

Surface area of coin = π r²
where π can be typed in scientific calculator

Answer: π x 14 x 14 = 615.752 cm²
You might be interested in
Describe two substances that are useful because of their viscosity
sp2606 [1]
Oil and Grease are examples of substances that are useful because of their viscosity.


Hope this help.
8 0
3 years ago
A 642 mL sample of oxygen gas at 23.5°C and 795 mm Hg, is heated to 31.7°C and the volume of the gas expands to 957 mL. What is
Ratling [72]
We can use the combined gas law equation to find the new pressure of the gas. 
\frac{P1V1}{T1} =  \frac{P2V2}{T2}
where P - pressure 
V - volume
T - temperature 
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation 
P1 - 795 mm Hg x 0.0013 atm/ mm Hg = 1.033 atm
T1 - 23.5 °C + 273 = 296.5 K
T2 - 31.7 °C + 273 = 304.7 K
substituting the values in the equation 
\frac{1.033 atm *642 mL}{296.5K}=   \frac{P*957mL}{304.7K}
P = 0.712 atm 
the answer closest to this value is A) 0.723 atm
therefore answer is 
<span>A) 0.723 atm</span>
8 0
4 years ago
Burning biofuels releases co2 into the atmosphere, contributing to global warming. however, this is at least partially offset by
castortr0y [4]
Photosynthesis in green plants during which CO2 is absorbed to form glucose
3 0
3 years ago
What is a distinguishing feature about ionic bonds?
Sergeeva-Olga [200]

Answer:

Here:

Explanation:

So ionic bonds are formed due to electrostatic attraction. For example, in NaCl, Na gives an electron to Cl, getting Na+ and Cl- where + and - charges attract and form an ionic bond.

4 0
4 years ago
Which of the following is a chemical change? A. soil drying as water evaporates B. a rock eroding as the wind removes particles
maxonik [38]

Answer:

Its D

Explanation:

I took the quiz

5 0
3 years ago
Read 2 more answers
Other questions:
  • This map shows the ages of the Atlantic oceanic crust
    6·1 answer
  • Can you make alcohol by putting abunch of cut up fruits in a bag for about 2 weeks?
    5·1 answer
  • 6.Which set of coefficients correctly balances the following chemical equation?___ Mg(OH)2 + ___ HCl Imported Asset ___ MgCl2 +
    8·2 answers
  • Heat is the transfer of thermal energy because of _____ difference.
    15·2 answers
  • The pOH of a solution is 6.0. Which statement is correct? Use p O H equals negative logarithm StartBracket upper O upper H super
    7·1 answer
  • Which of the following results in a decrease in the entropy?
    10·1 answer
  • Consider the reaction of NO and CO to form N2 and CO2, according to the balanced equation: 2 NO (g) + 2 CO (g) → N2 (g) + 2 CO2
    15·1 answer
  • Alchemy was the precursor to what branch of science?
    5·1 answer
  • 2.1 Interpret the results based on your understanding. Indicate deficiencies and excesses. (20)
    6·1 answer
  • What class of organic molecule is shown below?но|||OA. Carboxylic acidOB. AldehydeOC. EsterOD. KetoneH-C-C-O-C-C-HHHIIHHH
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!