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
uranmaximum [27]
3 years ago
15

What % of all the atoms in the universe are hydrogen

Chemistry
1 answer:
irga5000 [103]3 years ago
5 0

Answer:

Over ninety percent of all the atoms in the Universe are hydrogen atoms.

Explanation:

Over ninety percent of all the atoms in the Universe are hydrogen atoms. By mass, hydrogen makes up about 75% of all matter in the Universe. Hydrogen atoms are also the smallest and lightest of all the atoms with only one electron and one proton in a common single hydrogen atom (called protium).

You might be interested in
Consider the addition of HBr to 2-pentene. Indicate the re
lana [24]

Answer:

This addition reaction yields 3-BromoPentane and 2-BromoPentane.

Explanation: The reaction is an addition reaction that follows the Markonikoff's principle engaging the electrophillic addition mechnism with electrophile having no lone pair so rearrangement of carbonation is possible. It yields two possible products.

5 0
3 years ago
2)
vodomira [7]

Answer:

Final volume 30.513 L.

Explanation:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Given data:

Initial volume = 17 L

Initial pressure = 2.3 atm

Initial temperature = 299 K

Final temperature = 350 K

Final volume = ?

Final pressure = 1.5 atm

Solution:

P₁V₁/T₁ = P₂V₂/T₂

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 2.3 atm × 17 L × 350 K / 299 K × 1.5 atm

V₂  =  13685 atm .L.  K  / 448.5 K . atm

V₂  = 30.513 L

6 0
2 years ago
Acids & bases/concentration A mixture is made by mixing 425 mL of 0.94 M H2SO4 with 750. mL of 0.83 M NaOH. (a) What is the
Ksenya-84 [330]

Answer:

I'm really sorry but I didn't understand your question

4 0
3 years ago
Give two examples of steroids
Sonbull [250]
Steroids are like hormones that greatly influences bodily activities mostly in growth and function. These functions may modify, change and control one’s body organs or system that’ll vary in form, shape or structure due to these hormone-like compounds and also, it can affect one’s psychological and neurological state. There are several types of steroids. Examples can include: <span><span>
1. </span>Sex steroids. These are can influence reproduction and sex characteristics.</span> <span><span>
2. </span>Anabolic steroids. Most abused in many athletic activities. These steroids are used for muscle and bone growth. </span>



3 0
2 years ago
A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as wel
murzikaleks [220]

Answer:

V equals four-thirds times pi times r cubed

Explanation:

Volume = a³ , where a is length of each side. Volume = l × w × h , where l is length, w is width and h is height. Volume = 4/3 πr³ , where r is the radius. Volume = πr²h , where r is the radius and h is the height.

7 0
3 years ago
Other questions:
  • 2. What was the primary reason in the 1850's driving the curiosity of atoms?
    14·1 answer
  • What would indicate that a physical change takes place when copper is drawn into wire
    8·2 answers
  • In a resting state, sodium (Na ) is at a higher concentration outside the cell and potassium (K ) is more concentrated inside th
    14·1 answer
  • A limestone plateau has no surface water. All the water is pulled underground through cracks and crevices in the surface. What m
    11·1 answer
  • Chapter 2.4.1. The ______ energy lost by the inward movement of nickel-iron within a differentiating molten planetary body would
    10·1 answer
  • Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g C2H2?
    5·2 answers
  • How many moles of HCl would react with 37.1 mL of 0.138 M Sr(OH)2
    12·1 answer
  • Consider that the room is a closed system. Ryan uses the chemical energy in his muscles to create the energy of motion. He uses
    12·2 answers
  • Calculate the amount in grams in 0.52600 moles of vanadium.
    10·1 answer
  • Please help me. It's urgent .
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!