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
rusak2 [61]
4 years ago
13

Please help!!

Chemistry
2 answers:
ludmilkaskok [199]4 years ago
8 0

Answer:

yes, the law of conservation of mass hold true in this case burning magnesium strip is explained by this equation 2 Mg (s) + O2 (g) -> MgO (s)So the lighter magnesium, after reacting with oxygen in air, forms the heavier magnesium oxide. molar mass of magnesium and magnesium oxide are 24g and 40g respectively. So the same ratio 24:40 (i.e. 3:5) is maintained in the given masses of 48g and 80g, which means mass is conserved in the reacion.

Explanation:

Brainiest Please!!!

Mnenie [13.5K]4 years ago
8 0

Answer:

Yes, because when burning the magnesium strip the surrounding air also interacted and combined with it. In the experiment the final product weighs 80 grams, so you would subtract 80 – 48 leaving you with 32 grams. So the total mass of air that was added was 32 grams.

Ps. don't copy just reword

Explanation:

You might be interested in
Use the fact that to determine how much the pressure must change in order to lower the boiling point of water by a small amount
erma4kov [3.2K]

Complete Question

Use the fact that d\mu=\frac{V}{N}dp-\frac{s}{N}dT to determine how much the pressure must change in order to lower the boiling point of water by a small amount 3.20e-01 K. You may assume that the entropy and density of the liquid and gas are roughly constant for these small changes. You may also assume that the volume per molecule of liquid water is approximately zero compared to that of water vapor, and that water vapor is an ideal gas. Useful constants: Atmospheric pressure is 101300 Pa The boiling point of water at atmospheric pressure is 373.15 K The entropy difference between liquid and gas per kilogram is 6.05e 03 J/kgK The molecular weight of water is 0.018 kg/mol. (a) 0.00e 00 Pa (b) 1.14e 03 Pa (c) 6.85e 26 Pa (d) 4.24e 05 Pa (e) 3.81e 28 Pa

Answer:

Correct option is B

Explanation:

From the question we are told that:

Given Equation d\mu=\frac{V}{N}dp-\frac{s}{N}dT

Change of boiling point \triangle H=3.20e-01 K

Generally the equation for Change in time is mathematically given by

  d\mu=\frac{V}{N}dp-\frac{s}{N}dT

  dp=\frac{s}{v}dT

Where

    s=Entropy\ difference *molar\ weight

    s=6.05*10^3*0.018j/mol.k

And

    V=\frac{RT}{P} (from ideal gas equation)

Therefore

 dp=\frac{Ps}{RT}dT

 dp=\frac{101300*6.05*10^3*0.018}{8.314*373.15}3.20*10^{-1}

 dp=1137.873pa

 dp=1.14e 03 Pa

Therefore correct option is B

4 0
3 years ago
In need of a friend, boys 13-14 comment or answer if your in!
elena-14-01-66 [18.8K]

Answer:

Now im not a boy, but i recommend the app discord its a great app to meet new friends.

Explanation:

u can join servers and everything, when i had the app i met over 200 people. so i recommend.

8 0
3 years ago
Read 2 more answers
How many grams of oxygen are in a half a cup of water
USPshnik [31]

Answer:  2.78 moles of molecular oxygen will occupy 62.22 liters.

Explanation:

8 0
3 years ago
SICL4 + H2O sio2 hcl
atroni [7]

Do you want this equation balanced?

If so, it would be

SiCl4 + 2H2O ---> SiO2 + 4HCl

5 0
3 years ago
An electron has an uncertainty in its position of 513 pm. What is the uncertainty in its velocity?
ella [17]
"The uncertainty<span> in </span>velocity<span> is Δv=1.05⋅105m/s . According to the Heisenberg </span>Uncertainty<span> Principle, you cannot measure simultaneously with great precision both the momentum and the position of a particle. m - the mass of an electron - 9.10938⋅10−31kg." 
-socratic.com</span>
7 0
4 years ago
Other questions:
  • Give two possible reasons why using tap water instead of distilled water could give misleading
    10·1 answer
  • Why are the trends and exceptions to the trends in ionization energy observed? Check all that apply. Ionization energy tends to
    8·2 answers
  • A sample of aluminum absorbs 9.86 J of heat, upon which the temperature increases from 23.2°C to 30.5°C. Since the specific heat
    15·1 answer
  • The carbon atoms of acetic acid (CH3COOH) exhibit what type of hybridization?A.) spB.) sp^2C.) sp^3D.) sp^2 and sp^3
    9·1 answer
  • Consider this reaction at equilibrium at a total pressure P1: 2SO2(g) + O2(g) → 2SO3(g) Suppose the volume of this system is c
    9·1 answer
  • What are the effect of water pollition​
    14·1 answer
  • Help ASAP!!!
    15·1 answer
  • Please help with this chemistry question it’s due by midnight
    15·1 answer
  • Which of the following best defines balanced forces?
    12·2 answers
  • Draw and name the isomers of c4h9NH2
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!