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
klio [65]
3 years ago
12

What mass is contributed by Br-79?

Chemistry
1 answer:
satela [25.4K]3 years ago
6 0

Answer:

Calculate the mass of BR -79? Bromine has 2 naturally occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu

Explanation:

if i get this wrong srry

You might be interested in
What type of reaction is: 4 Fe + 3 O2 → 2 Fe2O3
Dafna11 [192]

Answer:

A. synthesis

Explanation:

The reaction given is a synthesis reaction in which two substances combines to give a product.

In this reaction:

      4Fe + 3O₂ →  2Fe₂O₃

The reaction involves the formation of a single product from two or more reactants.

The formation of a compound from union of the constituent elements also falls into this category of reaction.

3 0
3 years ago
if you were to compare the mass of the products and reactants in a reaction, you would find that the mass of the products is alw
Salsk061 [2.6K]
If you were to compare the mass of the products and reactants in a reaction, you would find that the mass of the products is <span>equal to the mass of the reactants.</span>
3 0
3 years ago
Explain why materials with metallic lattice structures can be used to make wires and connections that conduct electricity in ele
kogti [31]
<span>All metals have similar properties BUT, there can be wide variations in melting point, boiling point, density, electrical conductivity and physical strength.<span>To explain the physical properties of metals like iron or sodium we need a more sophisticated picture than a simple particle model of atoms all lined up in close packed rows and layers, though this picture is correctly described as another example of a giant lattice held together by metallic bonding.</span><span>A giant metallic lattice – the <span>crystal lattice of metals consists of ions (NOT atoms) </span>surrounded by a 'sea of electrons' that form the giant lattice (2D diagram above right).</span><span>The outer electrons (–) from the original metal atoms are free to move around between the positive metal ions formed (+).</span><span>These 'free' or 'delocalised' electrons from the outer shell of the metal atoms are the 'electronic glue' holding the particles together.</span><span>There is a strong electrical force of attraction between these <span>free electrons </span>(mobile electrons or 'sea' of delocalised electrons)<span> (–)</span> and the 'immobile' positive metal ions (+) that form the giant lattice and this is the metallic bond. The attractive force acts in all directions.</span><span>Metallic bonding is not directional like covalent bonding, it is like ionic bonding in the sense that the force of attraction between the positive metal ions and the mobile electrons acts in every direction about the fixed (immobile) metal ions of the metal crystal lattice, but in ionic lattices none of the ions are mobile. a big difference between a metal bond and an ionic bond.</span><span>Metals can become weakened when repeatedly stressed and strained.<span><span>This can lead to faults developing in the metal structure called 'metal fatigue' or 'stress fractures'.</span><span>If the metal fatigue is significant it can lead to the collapse of a metal structure.</span></span></span></span>
7 0
3 years ago
David has a weather balloon that he fills with helium and then releases. As the balloon rises into the atmosphere, the balloon g
katrin2010 [14]

Answer: B

Explanation: since the balloon is getting bigger it would make sense for the volume to increase ( get bigger) when volume increases the pressure decreases

6 0
3 years ago
During photosynthesis, carbon dioxide, water, and energy react to form glucose and oxygen. Which line would be longer on the ene
timama [110]

Answer:

The vertical line indicating bonds breaking

Explanation:

3 0
2 years ago
Other questions:
  • You are a scientist conducting an experiment on energy transfers. During the reaction you measure a large transfer of heat energ
    13·2 answers
  • WILL GIVE BRAINLIEST
    5·2 answers
  • A sample of ink is put in the center of filter paper . Several drops of ethanol are then put on the ink mark. Two concentric rin
    5·1 answer
  • CC14<br> Element<br> Compound<br> Which one is it
    13·1 answer
  • I need help please, will mark you the brainliest.
    15·1 answer
  • Why can water dissolve many substances
    14·1 answer
  • In the balanced chemical equation for the formation of ammonia (NH3) from
    12·1 answer
  • The scientific method is ___ <br>a. linear<br>b. cyclic​
    10·1 answer
  • A soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an empty soda bot
    14·1 answer
  • Help meee <br> CO2 + H2 → CH4 + H2O
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!