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
dem82 [27]
2 years ago
5

Please help me i’m struggling

Chemistry
1 answer:
Marrrta [24]2 years ago
3 0

Answeeeeer:

 A. cell

Explanation:

Since A is the smallest in the chart, that would correspond to the cell because thats the smallest out of Tissue, Organ and Organism.

You might be interested in
What is the wavelength of light in nm with energy of 6.95 x 10^-27 J?
77julia77 [94]

Answer: 27 Hope it helps u

4 0
2 years ago
Helium is the lightest noble gas and the second most abundant element (after hydrogen) in the universe. The mass of a helium−4 a
dmitriy555 [2]

<u>Answer:</u> The fraction of atom's mass contributed by nucleus is 0.99

<u>Explanation:</u>

Nucleons are defined as the sub-atomic particles which are present in the nucleus of an atom. Nucleons are protons and neutrons.

The isotopic symbol of Helium-4 atom is _2^4\textrm{He}

Number of electrons = 2

Number of protons = 2

Number of neutrons = 4 - 2 = 2

We are given:

Mass of He-4 atom = 6.64648\times 10^{-24}g

Mass of 1 electron = 9.10939\times 10^{-28}g

Calculating the mass contributed by the nucleus = m_{He}-2(m_e)

Mass of the nucleus of He-4 atom = 6.64648\times 10^{-24}-(2\times (9.10939\times 10^{-28}))=(6.64648-0.0018219)\times 10^{-24}=6.64466\times 10^{-24}

To calculate the fraction of atom's mass contributed by the nucleus, we use the equation:

\text{Fraction of atom's mass contributed by nucleus}=\frac{\text{Mass of nucleus}}{\text{Mass of atom}}

Putting values in above equation, we get:

\text{Fraction of atom's mass contributed by nucleus}=\frac{6.64466\times 10^{-24}g}{6.64648\times 10^{-24}g}=0.99

Hence, the fraction of atom's mass contributed by nucleus is 0.99

8 0
2 years ago
A cup of cocoa is left on the counter. Which best describes how its temperature changes? a) the heat leaves the cup of cocoa b)
zysi [14]

I'm going to have to say A. My reason to that is because when you leave a cup of hot cocoa (assuming its hot), it gives off the heat (exothermic) the

7 0
2 years ago
The recommended daily sugar intake is 50.0 gram. How many moles of sugar (C12H22O11) are in 50.0 grams of sugar?
Kitty [74]

Answer:

0.14607220033346532

Explanation:

3 0
2 years ago
What are three ways of the atmosphere is important to living things?
UNO [17]
  <span>1. Blocks Ultra violet rays that can be harmful.
2. Provides Oxygen, so we can live. 
3. It blocks meteors from hitting Earth's surface. 
</span><span>
</span>
7 0
2 years ago
Other questions:
  • Una disolución acuosa contiene el aminoácido glicina (NH2CH2COOH). Suponiendo que
    10·1 answer
  • The heat capacity of chloroform (trichloromethane,CHCl3)
    14·1 answer
  • When the pressure that a gas exerts on a sealed container changes from 22.5 psi to psi the temperature changes from 110 c to 65.
    14·1 answer
  • Explain how solid naphthalene in mothballs is distributed evenly through clothes in a drawer
    10·1 answer
  • List 2 everyday situations in which it would be useful to identify unknown substances.
    14·1 answer
  • Thermal radiation emitted by objects allows us to feel infrared<br> energy as _____
    7·1 answer
  • 11x + 13<br> 12x+6 Solve for x
    13·2 answers
  • In a nuclear power plant, what is the purpose of the cooling tower?
    10·1 answer
  • What specialized plant structures increase the probability of successful reproduction?
    13·2 answers
  • Only animals and not plants can adapt to their environment true or false
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!