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
babunello [35]
3 years ago
10

Choose all the answers that apply. Which of the following will decrease reaction rate? increase pressure decrease temperature in

crease concentration decrease concentration
Chemistry
2 answers:
bazaltina [42]3 years ago
7 0

The following will decrease reaction rate

  • decrease temperature  
  • decrease concentration
<h3>Further explanation  </h3>

The reaction rate (v) shows the change in the concentration of the substance (changes in addition to concentrations for reaction products or changes in concentration reduction for reactants) per unit time.  

Can be formulated:  

Reaction: aA ---> bB  

\large{\boxed{\boxed{\bold{v~=~-\frac{\Delta A}{\Delta t}}}}  

or  

\large{\boxed{\boxed{\bold{v~=~+\frac{\Delta B}{\Delta t}}}}  

A = reagent  

B = product  

v = reaction rate  

t = reaction time  

In chemical reactions several factors influence :

  • 1. Temperature

The temperature of the reaction that is raised will cause the particles to move more actively so that collisions between particles will become more frequent so that the speed of chemical reactions will be greater

  • 2. Pressure

Addition of pressure will increase the concentration because the volume is reduced, a greater concentration will accelerate the reaction

  • 3. Concentration

The greater the concentration, the more substances dissolved and involved in the reaction, thereby increasing the speed of the reaction

  • 4. Stirring

The mechanical force applied to the solution that reacts will cause more collisions to accelerate the reaction

  • 5 Catalysts

Addition of a catalyst to accelerate the reaction without reaction with reactant substances

So the following will decrease reaction rate

  • decrease temperature  
  • decrease concentration

<h3>Learn more </h3>

the rate of a reaction

brainly.com/question/7127331

the rate of a reaction can be increased

brainly.com/question/6710438

Endothermic and exothermic reactions

brainly.com/question/8552336

the rate of a reaction can be increased2

brainly.com/question/6721185

zavuch27 [327]3 years ago
6 0

The following quantities will effect the reaction rate as follows:

1. On increasing Concentration of the reactant: Rate of the reaction will increases.

2. On increasing pressure : Increases the rate of reaction to the side where there are fewer number of molecules.

3.On increasing temperature of an endothermic reaction: Increases the rate of reaction

4. On decreasing temperature of an endothermic reaction: Increases the rate of reaction.

So the answer is increase pressure, decrease temperature, increase concentration will increases the rate of the reaction.

You might be interested in
2.50 g of Zn is added to 5.00 g of HCl
Debora [2.8K]
Zn+2HCl ----> 2ZnCl2 + H2

For 2.50 g of Zn

Mass per mol = 2.50/molar mass of Zn = 2.50/65.38 = 0.0382 g/mol
There are two moles of ZnCl2 and total mass = 2*0.0382*molar mass of ZnCl2 = 2*0.0382*136.286 = 10.42 g

For 2 g of HCl

Mass per mol = 2/2*molar mass of HCl = 2/ (2*36.46) = 0.0274 g/mol
For the two moles of ZnCl2, mass produced = 2*0.0274*136.286 = 7.48 g

It can be noted that 2 g of HCl produced less amount of ZnCl and thus it is the limiting reagent.
5 0
3 years ago
please help me with Chem I ONLY HAVE 5 MINUTES if methane gas (CH4) flows at a rate of 0.25L/s, how many grams of methane gas wi
Nookie1986 [14]

Answer:

643g of methane will there be in the room

Explanation:

To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -<em>Assuming STP-</em>. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:

<em>Volume Methane:</em>

3600s * (0.25L / s) = 900L Methane

<em>Moles methane:</em>

PV = nRT; PV / RT = n

<em>Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP</em>

Replacing:

PV / RT = n

1atm*900L / 0.082atmL/molK*273.15 = n

n = 40.18mol methane

<em>Mass methane:</em>

40.18 moles * (16g/mol) =

<h3>643g of methane will there be in the room</h3>
5 0
3 years ago
Sample Response: Forces are either positive or negative vectors, depending on the direction in which the force is acting. The ne
lianna [129]

The net force is the sum of all of the forces that cancelled out to zero. Hence, option D is correct.

<h3>What is force?</h3>

The pushes or pulls on an object with mass causes it to change its velocity.

The net force is the vector sum of all forces acting on an object. Force is a vector quantity.

Two forces of equal magnitude when acting on an object in opposite directions will cancel out each other.

As a result net force is equal to 0. The word net here shows the total force acting on the object.

Hence, option D is correct.

Learn more about the force here:

brainly.com/question/14902131

#SPJ1

8 0
2 years ago
Read 2 more answers
If all of your calculations involved using a 'hot pink' result, what would be the result of the unknown acid concentration?
Ket [755]

Answer:

it would appear to be more concentrated than it should be because more base was added that should have been

Explanation:

7 0
3 years ago
A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make
Marta_Voda [28]

Answer:

32g

Explanation:

potassium nitrate has solubility of about 67g per 100g of water at 40°C, which means that potassium nitrate solution will contain 67g of dissolved salt for every 100g of water.

since at this temperature, our solution contains  35g of potassium nitrate 100g  of water. The solution will be unsaturated because of the less potassium nitrate.

to make saturated solution,

mass of potassuim nitrate = 67g - 35g

= 32g

which means dissolving another  32g  of potassium nitrate in solution at 40 °C will make saturated solution.

5 0
3 years ago
Other questions:
  • Which of the following lists elements from lowest to highest atomic number
    10·1 answer
  • A substance that increases the rate of a reaction without being involved itself is called a _______
    13·1 answer
  • 1.<br> What are different ways that genetic technology is used?
    12·2 answers
  • 6. What is the total number of calories lost when 10
    6·1 answer
  • What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?
    14·1 answer
  • What is the nature of the Ca-Cl bond in a molecule of calcium chloride (CaCl2) if the electronegativity value of calcium is 1.0
    15·1 answer
  • Explain the most important difference between a physical and chemical change.
    12·2 answers
  • A 10.00 mL sample of ethanol is added to 250.0 mL of water in order to observe the freezing point depression of the water. Consi
    7·2 answers
  • What is the mass in grams of 7.5 x 10^15 atoms of nickel, Ni?
    7·1 answer
  • Here is the electron configuration for Magnesium. How many total electrons are in the 2nd energy level?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!