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
pshichka [43]
4 years ago
9

Which statements about exothermic and endothermic reactions are correct? (its a multiple choice question)

Chemistry
1 answer:
geniusboy [140]4 years ago
5 0

Answer:

C)1 and 3 only☺️

Explanation:

You might be interested in
Tell why small droplets of water on an oily surface are almost spherical.
nlexa [21]

Explanation:

When the water droplets are placed in oily surface, oil being non-polar, thus there will not be adhesive force between water and oil.

Thus, surface tension is the factor which is responsible for shape of the water droplets to be spherical. The water molecules are pulled into the spherical shape by the action of the cohesive forces which is acting on the surface layer. As, the medium is totally different outside, the water molecules tend to get the minimum area and thus, forming spherical droplets.

5 0
3 years ago
What is the energy required to remove the electron from a hydrogen atom in the n = 11 state?
zaharov [31]

Based on the data given, the energy required to remove an electron from a hydrogen atom in the n = 11 state is -0.112 eV

<h3>What is ionization energy?</h3>

Ionization energy is the energy requiredto remove an electron from a neutral atom or a cation in its gaseous state.

To calculate the energy required to remove the electron from a hydrogen atom in the n = 11 state, the formula below is used:

  • E_n = \frac{E_0 × Z^{2}}{n^{2}}

where

E_0  \: is  \: ground  \: state  \: energy  \: of \:  hydrogen \:  atom \:  = -13.6 eV \\

  • Z = 1
  • n = 11

substituting the values:

E_n = \frac{ - 13.6 × 1^{2}}{11^{2}} \:  =  - 0.112 \: eV

Therefore, the energy required to remove an electron from a hydrogen atom in the n = 11 state is -0.112 eV

Learn more about ionization energy at: brainly.com/question/1445179

5 0
2 years ago
Define the clinical thermometer ​
Sloan [31]

Answer:

a small medical thermometer with a short but finely calibrated range, for taking a person's temperature.

6 0
3 years ago
Read 2 more answers
Which of the following has the smallest first ionization energy: F, Be, Sr or Ra?
topjm [15]
Ra, would have the lowest ionization energy. Remember ionization energy increases going up and to the right.
8 0
3 years ago
--IF YOU PUSH SOMETHING WITH STRONG FORCE DOES THE MOTION GO SLOWER
zaharov [31]

Answer:

i dont think so

Explanation:

is there a image to explain this ? if so it would help ALOT

8 0
2 years ago
Read 2 more answers
Other questions:
  • Which statement correctly describes potassium iodide, KI? There is a one-to-one ratio of potassium ions to iodide ions. Potassiu
    9·2 answers
  • A pharmacy technician measures the mass of a pill. The mass of one pill is
    7·2 answers
  • which of the following challenges poses the biggest problem to the long term use of alternative fuels
    13·2 answers
  • For the following reaction, identify one conjugate acid-base pair
    12·1 answer
  • How could you separate the isomers of pentane? 1.react with methane 2.heating in a beaker 3.distillation 4.filtering
    14·1 answer
  • Which phrase change is an endothermic change? (1 point)
    11·1 answer
  • Write and balance an equation for the following reaction. Identify the type of reaction.
    10·1 answer
  • What brown substance in a cigarette causes lung cancer?
    10·2 answers
  • What is an example of a hydraulic device?<br> barber’s chair<br> levers<br> wheels<br> car
    5·2 answers
  • The density of a 1 milliter sample of water is 1 gram. express this density in milligrams per liter
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!