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
kati45 [8]
3 years ago
15

Which is the equation of a circle with its center at (-4,2) and a radius of 4?

Chemistry
1 answer:
trasher [3.6K]3 years ago
5 0
B because when you round your answer you’ll get 2
You might be interested in
During which phase of the moon does a lunar eclipse occur?
Lelu [443]
Full moon
A lunar eclipse can occur only at full moon. A total lunar eclipse can happen only when the sun, Earth and moon are perfectly lined up — anything less than perfection creates a partial lunar eclipse or no eclipse at all.
3 0
2 years ago
Is copper sulphate malleable?
jonny [76]

Answer:

Yes, Copper (Cu) in its pure form is a reddish-brown metallic element with high ductility and malleability that is an excellent conductor of heat and electricity: atomic weight 63.54; atomic number 29; density 8.94 g/cm3; melting point 1083°C; and boiling point 2595°C.

8 0
2 years ago
Read 2 more answers
Using the spectra data below, which structure best matches this data? c4h8o 1h nmr triplet at 1.05 ppm (3h) singlet at 2.13 ppm
Delicious77 [7]

Answer:

Butan-2-one

Explanation:

1. 1700 cm⁻¹

A strong peak near 1700 cm⁻¹ is almost certainly a carbonyl (C=O) group.

2. Triplet-quartet

A triplet-quartet pattern indicates an ethyl group.

The 2H quartet is a CH₂ adjacent to a CH₃. The peak normally occurs at δ 1.3, but it is shifted 1.2 ppm downfield to δ 2.47 by an adjacent C=O group.

The 3H triplet at δ 1.05 is the methyl group. It, too, is shifted downfield from its normal position at δ 0.9. The effect is smaller, because the methyl group is further from the carbonyl.

3. 3H(s) at δ 2.13

This indicates a CH₃ group with no adjacent hydrogen atoms.

It is shifted 0.8 ppm downfield to δ 2.13 by the adjacent C=O group.

4. Identification

The identified pieces are CH₃CH₂-, -(CO)-, and -CH₃. There is only one way to put them together: CH₃CH₂-(C=O)-CH₃.

The compound is butan-2-one.

5 0
2 years ago
1.00176 x 103<br> Scientific notation
Ber [7]

Answer:

1.0318128 × 10^2

Explanation:

7 0
2 years ago
What is a good essential question for the subject molecular compounds
Mashutka [201]
Why do molecules combined into chains?
6 0
2 years ago
Other questions:
  • Check all that apply. view available hint(s) water is known as a polar molecule because check all that apply. the hydrogen atom
    5·1 answer
  • NO2 and N2O4 undergo the reaction shown. When a sealed
    9·1 answer
  • Through which of the following ways does the sun primarily transfer it’s he injury to the earth
    9·1 answer
  • Of the following, where would we most likely find the most abundant storage of water?
    5·2 answers
  • How many grams of CaCl, are in 250 mL of 2.0 M CaCl ?
    11·1 answer
  • Which set of numbers gives the correct possible values of 1 for n = 3?
    7·1 answer
  • Balance this equation.<br> CH4 + _O2 --&gt; _CO2 + _H20
    9·1 answer
  • Adding oil to a table would ___________ the friction when sliding a book across it.
    15·2 answers
  • If I have one mole of cupcakes, how many cupcakes do I have?
    14·1 answer
  • An isotope of an element whose number of protons and neutrons place it on the edge of the Island of Stability is most likely
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!