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
Aleonysh [2.5K]
3 years ago
7

The universe is made up of ____

Chemistry
2 answers:
vladimir2022 [97]3 years ago
7 0
The correct should be A. thousands of galaxies
yKpoI14uk [10]3 years ago
5 0
A) thousands of Galaxies

Think, you have the Andromeda Galaxy, The Tobacco Galaxy, the Milky Way Galaxy and many many more
You might be interested in
A reaction has activation energy of 85kjper mol. What is the effect on the rate of raising the temperature from 20degree to 30 d
DENIUS [597]

Answer: The rate increases 3 times on raising the temperature from 20degree to 30 degree​

Explanation:

According to Arrhenius equation with change in temperature, the formula is as follows.

ln \frac{k_{2}}{k_{1}} = \frac{-E_{a}}{R}[\frac{1}{T_{2}} - \frac{1}{T_{1}}]

where k_2 = rate constant at temp T_2

k_1 = rate constant at temp T_1

E_a= activation energy

R= gas constant

T_1= temperature = 20^0C=(20+273)K=293K

T_2= temperature = 30^0C=(30+273)K=303K

ln \frac{k_{2}}{k_{1}} = \frac{-85\times 1000J/mol}{8.314J/Kmol}[\frac{1}{303} - \frac{1}{293}]

ln \frac{k_{2}}{k_{1}}=1.15

\frac{k_{2}}{k_{1}}=3

Thus rate increases 3 times on raising the temperature from 20degree to 30 degree​

3 0
3 years ago
Mendeleev arranged the known chemical elements in a table according to increasing
vesna_86 [32]
Atomic mass. Which is the number of protons and neutrons combined.
8 0
3 years ago
Really need help with this<br> Will give brainliest to whoever has the correct answer
lukranit [14]

Answer:

a=0.4\ m/s^2

Explanation:

1. Given that,

Initial speed of a bicycle, u = 4 m/s

The final speed of a bicycle, v = 6 m/s

Time, t = 6 s

We need to find the acceleration of the bicycle. We know that, acceleration is    equal to the change in speed divided by time taken. So,

a=\dfrac{v-u}{t}\\\\a=\dfrac{6-4}{5}\\\\a=0.4\ m/s^2

So, the acceleration of the bicycle is equal to 0.4\ m/s^2.

5 0
3 years ago
Is kingdom more specific taxon than family?
Eva8 [605]
Yes the kingdom is more specific
5 0
3 years ago
Splitting nuclei is called __________ and joining nuclei is called _________.
SCORPION-xisa [38]
The answer is B, nic fiss, nic fusi
8 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose Orville measures the length to be 1.55 cm. If the correct value is 1.32 cm, find Orville's % error.
    12·1 answer
  • Im the only noble gas with 2 electrons
    10·2 answers
  • What quantity of heat is required to raise the temperature of 460g of aluminum from 15C to 85C?
    5·1 answer
  • A nanometer (nm) is 1/billion of a meter (1×10^-9 m). Write this number:
    9·1 answer
  • Which of the following is NOT a characteristic of most ionic compounds?
    10·2 answers
  • How many moles of KBr are present in 8.96 x 10^21
    6·1 answer
  • What is one source for the variation that drives natural selection?
    11·2 answers
  • why do you think you can find silver and gold on their own in rocks but calcium and magnesium are combined with other elements t
    13·2 answers
  • 1A: Consider these compounds:
    7·1 answer
  • Which of the following always changes when a substance undergoes a chemical change?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!