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
ioda
4 years ago
6

Choose all the true statements concerning the law of conservation of mass:

Chemistry
2 answers:
Drupady [299]4 years ago
8 0
The answer would be:
b)2H2+ O2 → 2H2O is a balanced equation
d)A physical change does follow the law of conservation of mass

The law of conservation of mass states that the mass can't be destroyed or created.
When water becomes ice, the volume is increased but the mass isn't. This will cause the ice to have a lower density than water.
That means the mass of the product will be same as the reactant so the number of atoms in the reactant should be same with the number of atoms in the product. Physical and chemical changes should follow <span>the law of conservation of mass.</span>
Annette [7]4 years ago
3 0

B D AND E IS THE ANSWER.

You might be interested in
Ok so this is kind of a weird question so...yeah. Anyway,I’m homeschooled but all my friends are getting ready for homecoming an
Art [367]

Yeah, I think you just need to get permission from the school itself. I have seen people do it before at my old school. I would ask your friend and see if they could talk to someone about it.

3 0
3 years ago
Read 2 more answers
1C. You just have made unstable atoms.How can you make them stable?
Leokris [45]

Answer:

Fonts for Android and iPhone - www.fontskeyboard.com/share-now

Explanation:

☀︎︎☹︎♫︎☹︎♫︎

6 0
2 years ago
If the a of a monoprotic weak acid is 1. 2×10^−6. What is the [H] of a 0. 31 m solution of this acid?
Vanyuwa [196]

The pH of the solution of the given acid is 3.099

Let  HX  be the weak acid:

HX ⇌  H^{+}+ X^{-}

For which:

K_{a} = [ H^{+}][ X^{-}] / [HX]

If  K_{a} lies in the range 10^{-4} - 10^{-10}we can assume that the equilibrium concentrations used in the expression are a good enough approximation to the initial concentrations.

Rearranging and taking negative logs of both sides gives:

pH = \frac{1}{2} [pK_{a} - loga]

a is the concentration of the acid.

pK_{a} =-logK_{a} = -log (2×10^{-6}) = 5.69

pH = \frac{1}{2} [5.69- (-0.508)]

pH = 3.099

Learn more about pH of acid here;

brainly.com/question/13043236

#SPJ4

3 0
2 years ago
Consider the following reaction:
slava [35]

Answer:

Option D is correct =  58 g

Explanation:

Data Given:

mass of LiOH = 120 g

Mass of Li3N= ?

Solution:

To solve this problem we have to look at the reaction

Reaction:

                  Li₃N (s) + 3H₂0 (l) -----------► NH₃ (g) + 3LiOH (l)

                    1 mol                                                      3 mol

Convert moles to mass

Molar mass of LiOH = 24 g/mol

Molar mass of  Li₃N = 35 g/mol

So,

                   Li₃N (s)        +     3H₂0 (l) -----------► NH₃ (g) + 3LiOH (l)

                1 mol (35 g/mol)                                                   3 mol (24 g/mol)

                   35 g                                                                         72 g

So if we look at the reaction 35 g of Li₃N react with water and produces 72 g of LiOH , then how many g of Li₃N will be react to Produce by 120 g of  LiOH

For this apply unity formula

                        35 g of  Li₃N ≅ 72 g of LiOH

                        X of  Li₃N ≅ 120 g of LiOH

By Doing cross multiplication

                  Mass of Li₃N = 35 g x 120 g / 72 g

                   mass of Li₃N =  58 g

120 g of LiOH will produce from 58 g of Li₃N

So,

Option D is correct =  58 g

5 0
3 years ago
If 1.80 moles of NaCl was dissolved in enough water to make 3.60 L of solution, what is the Molarity?
sweet-ann [11.9K]

Answer:

0.5M

Explanation:

The equation for molarity is:

  • M = \frac{mol}{liters} ; where the "M" stands for molarity, the "mol" stands for moles of solute and the "liters" means the volume in liters of solution.

We are given that there are:

  • 1.80 moles of NaCl (the moles of solute)
  • 3.60 Liters of solution (the volume in liters of solution)

Now we just plug those numbers into the formula and get our answer:

  • M= \frac{1.80mol}{3.60L}= 0.5M

After doing the math and dividing the moles of solute by the liters of solution, we get that the molarity of the solution is 0.5M.

8 0
3 years ago
Other questions:
  • Often computers are described as not intelligent. How does the mindstorm prove this?
    11·1 answer
  • Plutonium-242 (242Pu) undergoes alpha decay to form what daughter isotope and decay particle?​
    12·1 answer
  • consider the redox reaction below which equation is half reaction that describes the reduction as taking place
    6·2 answers
  • The specific heat of ethanol is 2.44 J/g ֯C. How many kJ of energy are required to heat 50.0 grams of ethanol from -20 ֯C to 68
    13·1 answer
  • An aircraft is taking a group of skydivers up into the air. Evan is dressed in
    15·1 answer
  • In the reaction Zn H 2SO 4→ ZNSO4 + H2, which, if any element is oxidized
    9·1 answer
  • Question 6: what do i fill in the blank space? what are the units?
    9·2 answers
  • 4) Determine the oxidation state of Sn in Sn(SO4)2.
    15·1 answer
  • Q2 Write the following measurements in scientific notation using the concept of significant figures.
    9·1 answer
  • I do not understand this question if someone could help please
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!