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nordsb [41]
3 years ago
12

*blank* carry blood away from the heart, while *blank* carry blood back to the heart.

Chemistry
1 answer:
worty [1.4K]3 years ago
5 0

Answer:

i think its C im not so sure

Explanation:

nrjdkfkzhsugogo

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A spectral line has a wavelength of 7.35 *10-7 m. What is the energy of this radiation?
antoniya [11.8K]

Answer:

2.7 x 10^-19 J

Explanation:

The formula needed for this problem is

E = hν

where E = energy, h = Planck's constant = 6.626x10^-34 and ν is the frequency

c = λν

where c = speed of light = 3x10^8, and λ = wavelength

3x10^8 = 7.35x10^-7 . ν

ν = 4.08 x 10^14 Hz

E = 6.626x10^-34 . 4.08x10^14 = 2.7 x 10^-19 J

8 0
3 years ago
If a carbon atom is bonded to two hydrogen atoms and two carbon atoms
Nataliya [291]

Answer:

That molecule is a propane.

Explanation:

Look at the scheme

H3C ---------     ------ H    

                   C

H3C ---------     ------- H

C3H8

3 0
3 years ago
Maya made this picture to represent a chemical reaction:
natka813 [3]

Answer:

2) It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.

Explanation:

This is not a synthesis reaction, which takes place when two or more reactants combine to form one product. This is a single replacement reaction, where the cation of an ionic compound "trades places" with another element that becomes the cation in a new ionic compound.

8 0
3 years ago
Which non metals have similar chemical properties
mina [271]

Answer:

Chemical Properties of Nonmetals :

  • Nonmetals are poor conductors of heat and electricity. ...
  • Unlike metals, nonmetals aren't malleable and ductile.
  • Nonmetals react more with metals than with nonmetals.
  • Usually, nonmetals react with other nonmetals in high temperature.
  • Most nonmetals do not react with air in room temperature.

8 0
4 years ago
An ion has a charge of -1 and 10 electrons. How many protons does it have?
ivanzaharov [21]
If the ion has a charger of -1 and 10 electrons then it has 9 protons
3 0
3 years ago
Read 2 more answers
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