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
Burka [1]
3 years ago
14

What 2 things are conserved in every reaction?

Chemistry
1 answer:
Klio2033 [76]3 years ago
6 0
In every reaction, mass cannot be destroyed nor created as defined by the law of conservation of mass. Energy also cannot be destroyed when a chemical reaction takes place
You might be interested in
2. STEM The mass of an atom of helium is about 4.002 atomic units.
Anit [1.1K]

Answer:

The approximate mass of beryllium is 9.0045 u.

Explanation:

Given data:

mass of helium= 4.002 u

mass of beryllium which is 2.25 times of mass of helium= ?

Solution:

we will multiply the mass of helium with 2.25 times,

4.002 u × 2.25 = 9.0045 u

so the mass of beryllium atom would be 9.0045 u.

6 0
3 years ago
A student mixes a solution containing 10.0 g bacl2 (m = 208.2) with a solution containing 10.0 g na2so4 (m = 142.1) and obtains
professor190 [17]
The balanced equation for the above reaction is as follows;
Na₂SO₄ + BaCl₂ --> BaSO₄ + 2NaCl
Na₂SO₄ reacts with BaCl₂ in the molar ratio 1:1
Number of Na₂SO₄ moles - 10.0 g / 142.1 g/mol = 0.0704 mol
Number of BaCl₂ moles - 10.0 g / 208.2 g/mol = 0.0480 mol
this means that 0.0480 mol of each reactant is used up, BaCl₂ is the limiting reactant and Na₂SO₄ has been provided in excess. 
stoichiometry of BaCl₂ to BaSO₄ is 1:1
number of BaSO₄ moles formed - 0.0480 mol
Mass of BaSO₄ - 0.0480 mol x 233.2 g/mol = 11.2 g
theoretical yield is 11.2 g but the actual yield is 12.0 g
the actual product maybe more than the theoretical yield of the product as the measured mass of the actual yield might contain impurities. 
percent yield - 12.0 g/ 11.2 g x 100% = 107% 
this is due to impurities present in the product or product could be wet.
4 0
3 years ago
How much heat energy would be needed to raise the temperature of a 223 g sample of aluminum [(C=0.895 Jig Cy from 22.5°C to 55 0
dsp73

Answer : The heat energy needed would be, 6486.5125 J

Explanation :

To calculate the change in temperature, we use the equation:

q=mc\Delta T\\\\q=mc(T_2-T_1)

where,

q = heat needed = ?

m = mass of aluminum = 223 g

c = specific heat capacity of aluminum = 0.895J/g^oC

\Delta T = change in temperature

T_1 = initial temperature = 22.5^oC

T_2 = final temperature = 55.0^oC

Putting values in above equation, we get:

q=223g\times 0.895J/g^oC\times (55.0-22.5)^oC

q=6486.5125J

Therefore, the heat energy needed would be, 6486.5125 J

5 0
2 years ago
Predict at least two circumstances (outside influences) that would cause a system in equilibrium to change the concentrations of
tresset_1 [31]
<span>Any change in heat or pressure on a system in equilibrium will cause a shift of the equilibrium, changing the concentrations of the reactants and products. Increasing the heat for some reactions allows it to reach the threshold it needs to catalyze the reaction, for example.</span>
4 0
3 years ago
What ecosystem is being described in the passage?
Ad libitum [116K]

Answer:were is the passage

Explanation:

We’re the pasagee

5 0
3 years ago
Other questions:
  • What is the heat in joules required to convert 75.0 grams of water into steam if the ^Hvap of water is 2257j/g?
    14·1 answer
  • Many pollutants from coal-fired power plants are properly managed today. Which of the following is currently considered to be th
    12·1 answer
  • Explain how the following changes would affect the rate of the reaction of 2-bromo-3-methylbutane with methanol: Part A The alky
    7·1 answer
  • Where is the kinetic energy GREATEST?
    13·1 answer
  • Oxidation state for C in CO
    12·1 answer
  • What is an Isolated Atom?​
    15·1 answer
  • Consider the statement: “The temperature of the land is an important factor for the ripening of oranges, because it affects the
    12·1 answer
  • C₇H₆O₂ + O₂ --&gt;CO₂ +H₂O Find the chemical reaction
    6·2 answers
  • Nickel (iii) cyanide + aluminum permanganate product?
    10·1 answer
  • Why do we produce formaldehyde?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!