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
marishachu [46]
3 years ago
6

I need to repost cause I did it wrong and the price was blank, but imma mark BRAINLIEST on this one :D

Chemistry
1 answer:
k0ka [10]3 years ago
5 0

Explanation:

I'm pretty sure 1. yes 2. no and 3. it might be yes but I'd just put a maybe

You might be interested in
A 0.500-g sample of KCl is added to 50.0g of water in a calprimeter (Figure 5.12) If the temperature decreases by 1.05C. what is
Sauron [17]

Answer : The reaction is endothermic.

Explanation :

Formula used :

Q=m\times c\times \Delta T

where,

\Delta T = change in temperature = 1.05^oC

Q = heat involved in the dissolution of KCl = ?

m = mass = 0.500 + 50.0 = 50.5 g

c = specific heat of resulting solution = 4.18J/g^oC

Now put all the given value in the above formula, we get:

Q=50.5g\times 4.18J/g^oC\times 1.05^oC

Q=+221.64J

The heat involved in the dissolution of KCl is positive that means as the change in temperature decreases then the reaction is endothermic and as the change in temperature increases then the reaction is exothermic.

Hence, the reaction is endothermic.

8 0
3 years ago
Match each type of learning to the correct definition
pishuonlain [190]

Answer:

conditioning-the process of associating a stimulus with a good or bad outcome.

trial-and-error learning-the process of performing a behavior more and more skillfully.

insight learning-the process of using prior knowledge to solve a problem.

imprinting-a bond to an indivisual or object shortly after birth or hatching.

Explanation:

Did this assignment.

3 0
3 years ago
Read 2 more answers
Which of the following statements about elements is not true?
guapka [62]

Answer:

Option A is not true

Explanation:

Could you please follow me and mark me as the brainliest answer

6 0
3 years ago
calculate q for the following: 125.0 ml of 0.0500 m pb(no3)2 is mixed with 75.0 ml of 0.0200 m nacl at 25oc chegg
alexandr402 [8]

The value of Q for 125.0 ml of 0.0500 m Pb(NO3)2 is mixed with 75.0 ml of 0.0200 m NaCl at 25°C is 2.11 × 10^(-6).

Aa we know that, 125mL of 0.06M Pb(NO3)2 is mixed with 75.0 ml of 0.0200 m NaCl.

Given, T = 25°C.

<h3>Chemical equation:</h3>

Pb(NO3)2 + NaCl ---- NaNO3 + PbCl2

PbCl2 in aqueous solution split into following ions

PbCl2 ------ Pb(+2) + 2Cl-

Q = [Pb(+2)] [Cl-]^2

The Concentration of Pb(+2) ions and Cl- ions can be calculated as

[Pb(+2)] = 0.06 × 125/200

= 0.0375

[Cl-] = 0.02 × 75/200

= 0.0075

By substituting all the values, we get

[0.0375] [0.0075]^2

= 2.11 × 10^(-6).

Thus, we calculated that the value of Q for 125.0 ml of 0.0500 m Pb(NO3)2 is mixed with 75.0 ml of 0.0200 m NaCl at 25°C is 2.11 × 10^(-6).

learn more about Ions:

brainly.com/question/13692734

#SPJ4

6 0
2 years ago
What type of mountain are the andes mountains
Julli [10]
T<span>he </span>Andes<span> range has many active volcanoes, which are distributed in four volcanic zones separated by areas of inactivity. The </span>Andean<span> volcanism is a result of subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate.</span>
5 0
3 years ago
Other questions:
  • Which of the following would you expect to form an ionic bond when combined? (2 points) Select one: a. Si and O b. K and Ti c. H
    13·2 answers
  • Oxygen is in group 16 of the periodic table. An oxygen ion (O2-) has a charge of -2. Which of the following would be most likely
    8·1 answer
  • The following five beakers, each containing a solution of sodium chloride (NaCl, also known as table salt), were found on a lab
    8·2 answers
  • The first step in the free radical mechanism for the preparation of polyethylene is:
    14·1 answer
  • All of the following statements are correct except The conversion of compounds into elements is a chemical change. The conversio
    9·1 answer
  • Enter the chemical formula for water. formula:
    15·2 answers
  • A student is titrating 50 mL of 0.32 M NH3 with 0.5 M HCl. How much hydrochloric acid must be added to react completely with the
    14·1 answer
  • How is gold related to suns life cycle?
    10·1 answer
  • Which of the following will produce a 2 molar solution of copper (II) chloride?
    6·1 answer
  • Moles /Number of Particles Con
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!