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
Makovka662 [10]
3 years ago
12

Qué concluyó Proust en relación a la ley de las proporciones definidas?

Chemistry
1 answer:
goblinko [34]3 years ago
5 0

Answer:

Proust concluded that the elements in a chemical compound always present in the same ratio by mass.

Explanation:

In English, this finding became known as the Law of Definite Proportions.

For example, a 100 g sample of copper(II) sulfide always contains 66.46 g of copper and 33.54 g of sulfur.  

The mass ratio in CuS is

Cu/S = 66.46/33.54 = 1.982/1

You might be interested in
Speed is defined as __________.
MariettaO [177]

Answer:D)

Explanation: the distance traveled over time

6 0
2 years ago
HELIUM) has chemical properties so different from those of the other elements that it cannot be placed in any group. *
siniylev [52]

Answer:

jesus

Explanation:

jesus is always the answer

6 0
3 years ago
What type of energy moves from warmer to cooler?
stich3 [128]

Answer:

Thermal energy is transferred from hot places to cold places by convection. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas.

Explanation:

8 0
2 years ago
What is the mass of the solid NH4Cl formed when 75.5 g of NH3 is mixed with an equal mass of HCl? What is the volume of the gas
Gekata [30.6K]

Answer : The volume of the gas remaining is 56.5 liters.

The gas is hydrochloric acid and the formula of the gas is HCl.

The mass of NH_4Cl produced is, 110.7 grams.

Explanation :

The balanced chemical reaction will be:

NH_3+HCl\rightarrow NH_4Cl

First we have to calculate the moles of NH_3 and HCl

\text{Moles of }NH_3=\frac{\text{Mass of }NH_3}{\text{Molar mass of }NH_3}

Molar mass of NH_3 = 17 g/mole

\text{Moles of }NH_3=\frac{75.5g}{17g/mole}=4.44mole

and,

\text{Moles of }HCl=\frac{\text{Mass of }HCl}{\text{Molar mass of }HCl}

Molar mass of HCl = 36.5 g/mole

\text{Moles of }HCl=\frac{75.5g}{36.5g/mole}=2.07mole

Now we have to calculate the limiting and excess reagent.

From the balanced reaction we conclude that

As, 1 mole of HCl react with 1 mole of NH_3

So, 2.07 mole of HCl react with 2.07 mole of NH_3

From this we conclude that, NH_3 is an excess reagent because the given moles are greater than the required moles and HCl is a limiting reagent and it limits the formation of product.

The remaining moles of HCl gas = 4.44 - 2.07 = 2.37 moles

Now we have to calculate the volume of the gas remaining.

Using ideal gas equation :

PV = nRT

where,

P = Pressure of gas = 752 mmHg = 0.989 atm     (1 atm = 760 mmHg)

V = Volume of gas = ?

n = number of moles of gas = 2.37 moles

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas = 14.0^oC=273+14.0=287K

Putting values in above equation, we get:

0.989atm\times V=2.37mole\times (0.0821L.atm/mol.K)\times 287K

V = 56.5 L

Now we have to calculate the moles of NH_4Cl

As, 1 mole of HCl react with 1 mole of NH_4Cl

So, 2.07 mole of HCl react with 2.07 mole of NH_4Cl

Now we have to calculate the mass of NH_4Cl

\text{ Mass of }NH_4Cl=\text{ Moles of }NH_4Cl\times \text{ Molar mass of }NH_4Cl

Molar mass of NH_4Cl = 53.5 g/mole

\text{ Mass of }NH_4Cl=(2.07moles)\times (53.5g/mole)=110.7g

Thus, the volume of the gas remaining is 56.5 liters.

The gas is hydrochloric acid and the formula of the gas is HCl.

The mass of NH_4Cl produced is, 110.7 grams.

3 0
3 years ago
PLEASE ANSWER CORRECTLY! MARKING BRANLIEST!
seropon [69]

Answer: oil spill, forest fire

Explanation:

The short term environmental change is a change that occur in an environment which exerts it's effect over the environment and the living beings for a short duration. The damage caused by the short term environmental change can be recovered in a short time. The oil spill and forests fire are the example of short term environmental changes.

The oil spill will reduce the abundance of the aquatic species until the oil is circulated out at the bay of the water body therefore, it is a short term environmental change.

Forests fire will remain ignited for a short period but can be destructive enough to cause damage to flora and fauna species. As time passes the reduced populations of flora and fauna can be recovered again.

5 0
3 years ago
Read 2 more answers
Other questions:
  • The density of an unknown gas is found to be 3.44 g/l at standard temperature and pressure (stp). what is the molar mass of this
    14·1 answer
  • Which of the following objects would float when placed in water? (Note: 1 mL 1 cm+3)*
    13·1 answer
  • What characteristic of an epic hero does this passage
    15·1 answer
  • The mass of the ocean is about 1.8 1021 kg. if the ocean contains 1.076% by mass sodium ions, na+, what is the mass in kilograms
    13·1 answer
  • If two-parent with AB blood group claim and say that they have a baby with O blood group is born to them and it is their own bab
    8·1 answer
  • You want to compile a list of properties of a substance , but you don't have a way to measure mass it volume. What kinds of prop
    7·1 answer
  • hey i got a question for science its " you throw a rock with a mass of 3.6 kg. the ball leaves your hand with a speed of 10 m/s
    7·1 answer
  • The dictionary from #2 falls off the table. How much kinetic energy does it have just before it hits the floor?
    14·1 answer
  • 4. Why does the metallic character of the alkaline earth metals increase as you go down the
    14·1 answer
  • Which of the following is a reasonable ground-state electron configuration? (3 points)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!