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
Tomtit [17]
2 years ago
13

Please i need help ……

Chemistry
1 answer:
nasty-shy [4]2 years ago
3 0

Answer:

H2

Explanation:

(l) means liquid

(s) means solid

(g) means gaseous

I hope this helped [:

You might be interested in
What does velocity describe
White raven [17]
<span>Velocity describes the speed of an object and its direction of motion</span>
7 0
3 years ago
Read 2 more answers
Part a the sun produces energy via fusion. one of the fusion reactions that occurs in the sun is 411h→42he+201e how much energy
Orlov [11]
The equation for the nuclear fusion reaction is,
4 ¹₁H → ₂⁴He + 2 ₁⁰e
Calculation of mass defect,
Δm = [mass of products - mass of reactants]
      = 4(1.00782) - [4.00260 + 2(0.00054858)]
      = 0.0275828 g/mole
Given that,
Mass of Hydrogen-1 = 2.58 g
The no. of moles of ₁¹H = 2.58 g / 1.00782 = 2.56 moles
Therefore, the mass defect for 2.58 g of ₁¹H is, 
= 2.56 moles * (0.0275828 g / 4) = 0.01765 x 10⁻³ kg
Energy for (0.01765 x 10⁻³ kg) is, 
= (0.01765 x 10⁻³ kg) (3.0 x 10⁸)² = 1.59 x 10¹² J
4 0
3 years ago
Read 2 more answers
Explain reaction of metals with the following with the help of chemical equations; i) with acids ii) with oxygen iii) with water
Cerrena [4.2K]

i. When an acid reacts with metal, a salt and hydrogen are produced:

ii. When oxygen and metal react,  metal oxide forms also known as rust

iii. Acid and water produce hydroxide ions

3 0
3 years ago
Will mark brainliest!!
just olya [345]

Answer:

magnesium= +2

aluminum= +3

phosphorous= -3

lithium= +1

fluorine= -1

Explanation:

As fluorine having seven valance electrons in its outer most shell with atomic number nine. And for completing its outer most shell it needs one more electron that is why it form ion of -1 value.

Now  Aluminum has three electrons in its outer most shell with atomic number 13. So it need to lose these three electrons in order to be in stable state that is why it have ion in +3 state.

Same rule apply for other elements too.

5 0
3 years ago
3NO2 + H2O = 2 HNO3 + NO
ArbitrLikvidat [17]

Explanation:

is anyone here in the year 2018

8 0
3 years ago
Other questions:
  • Why is it better to give the actual speed of an object rather than to simply say it moved fast or it moved slowly
    7·1 answer
  • Does seasonal temperature affect tides?
    12·2 answers
  • What items are true about a block of ice at -10°C as you continue to apply heat
    12·1 answer
  • "Chilling" is most commonly practiced by:
    11·1 answer
  • Levi is conducting a comparative experiment where he is comparing the average temperature in cities and nearby rural areas. He f
    6·1 answer
  • describe how 250 cm³ of 0.2 mol/dm³ H2SO4 could be prepared from 150 cm³ of 1.0mol/dm³ stock solution of the acid​
    10·1 answer
  • A chemical reaction that is first order in X is observed to have a rate constant of 1.7 x 10–2s–1. If the initial concentration
    5·1 answer
  • A sample of liquid ammonia has a density of 0.7 g/mL. Find the mass of a 20 mL
    12·1 answer
  • Is it worth it? In other words, will the benefits we receive from an action be worth the costs? The process of weighing these de
    13·1 answer
  • Please help Why can we listen to radio or watch TV indoors?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!