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
kodGreya [7K]
3 years ago
5

Which statement correctly describes an endothermic chemical reaction?

Chemistry
1 answer:
Natasha2012 [34]3 years ago
7 0
An endothermic chemical reactions products tend to have a higher potential energy than the reactants. Thus making the /\ H positive, not negative. 
You might be interested in
1. A gas has a volume of 50.0 mL at a temperature of -73°C. What volume
Anton [14]
This is your answer:


-13 degrees C
3 0
3 years ago
The Chalfont soils are a distinct group of soils found in Pennsylvania, New Jersey, and Maryland. The parent material for these
Lelechka [254]
I believe the answer is D. loess. The loess soil is a predominantly silt-sized sediment formed by accumulation of wind blown dust. This soil is highly porous, homogeneous, pale yellow and friable. One way of forming loess is from glaciers and that is why they contain glacially ground flour like clay and silt.
7 0
3 years ago
Read 2 more answers
You are given solutions of hcl and naoh and must determine their concentrations. you use 27.5 ml of naoh to titrate 100.0 ml of
Dafna1 [17]
1) Start by standardizing the solution of NaOH by using the solution of H2SO4 whose concentration is known.

2) Equation:

2Na OH + H2SO4 --> Na2 SO4 + 2H2O

3) molar ratios

2 mol NaOH : 1 mol H2SO4

4) Number of moles of H2SO4 in 50.0 ml of 0.0782 M solution

M = n / V => n = M*V = 0.0782 M * 0.050 l = 0.00391 mol H2SO4

5) Number of moles of NaOH

2 moles NaOH / 1mol H2SO4 * 0.00391 mol H2SO4 = 0.00782 mol NaOH

6) Concentration of the solution of NaOH

M = n / V = 0.00782 mol / 0.0184 ml = 0.425 M

7) Standardize the solution of HCl

Chemical reaction:

NaOH + HCl --> NaCl + H2O

8) Molar ratios

1 mol NaOH : 1 mol HCl

9) Number of moles of NaOH in 27.5 ml

M = n / V => n = M * V = 0.425 M * 0.0275 l = 0.01169 moles NaOH

10) Number of moles of HCl

1 mol HCl / 1mol NaOH * 0.01169 mol NaOH = 0.01169 mol HCl

11) Concentration of the solution of HCl

M = n / V = 0.01169 mol / 0.100 l = 0.1169 M

Rounded to 3 significant figures = 0.117 M

Answers:

[NaOH] = 0.425 M
[HCl] = 0.117 M
3 0
3 years ago
Which of the following correctly applies to a catalyst? a. They do not actually participate in the chemical reaction and therefo
lawyer [7]

Answer: option B) They provide an alternate lower energy mechanism by which the reaction proceeds

Explanation:

Catalyst are involved in chemical reaction increasing the rate they occur by lowering the activation energy found in the bound- reactants complex.

The reaction moves forward because the lower energy mechanism when catalyst are added allows for a more easily splitted bond, thus, allowing the formation of products.

6 0
3 years ago
What are the names of the compounds KCIO3 and H2SO4 respectively​
aksik [14]

Answer:

Explanation:

Hi friend, Potassium chlorate is a a white crystalline compound containing potassium, chlorine and oxygen atoms, with the molecular formula KClO3.Jul 26, 2017

4 0
3 years ago
Read 2 more answers
Other questions:
  • Why does Hess's law allow you to determine the enthalpy change of a<br> reaction?
    6·1 answer
  • What is the density of water if you have 50.0 grams of water and a volume of 50.0 millimeters
    14·1 answer
  • If the temperature of a gas is raised from 30°C to 60°C, what happens to the pressure?
    5·1 answer
  • What is the escape speed for an electron initially at rest on the surface of a sphere with a radius of 1.7 cm and a uniformly di
    5·1 answer
  • Use the periodic table to calculate the percent composition of hydrogen in hexane.
    5·1 answer
  • Which is one piece of information that "9” gives about an atom of fluorine?
    14·2 answers
  • New Account add me n free po. ints
    15·1 answer
  • Which part of the Periodic Table of the elements is used to identify valence electrons? *
    6·1 answer
  • Which statement accurately describes the energy of a block of ice?
    12·1 answer
  • If the pressure of the gas is doubled while the volume is held constant, what happens to its temperature?.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!