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
Colt1911 [192]
3 years ago
11

Heated bricks or blocks of iron were used long ago to warm beds. A 1.49 -kg block of iron heated to 155 Celsius would release ho

w many joules of heat as it cooled to 22 Celsius ?
Chemistry
1 answer:
AlekseyPX3 years ago
6 0
Specific heat capacity= Quantity of heat/massxΔT
Shc of iron (constant)= 0.4494J/³C for 1g
1.49kg=1490g
Q=1490x(22-155)x0.4494
Q=<span>89057.598J</span>
You might be interested in
Temperature is used to measure the movement of particles such as atoms and molecules. As temperature increases, what is true of
ch4aika [34]
This is thermodynamics. When you increase the temperature of an object, the particles gain on kinethic energy ergo the move faster. When you decrease it, they slow down.
6 0
3 years ago
Read 2 more answers
Which describes the products created from fission reactions? Question 3 options:
Ipatiy [6.2K]

<u>Answer:</u> The correct answer is option A.

<u>Explanation:</u>

Nuclear fission reactions are a type of nuclear reactions in which larger nuclei breaks apart into two or more smaller fragment releasing alpha, gamma of beta particles.

There are 3 types of particles that can be released during this process:

1. Alpha particles: These particles are released when a nuclei undergoes alpha-decay process.

_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha

2. Beta particles: These particles are released when a nuclei undergoes beta-minus decay process.

_Z^A\textrm{X}\rightarrow _{Z+1}^{A}\textrm{Y}+_{-1}^0\beta

3. Gamma radiations: these radiations are released when an unstable nuclei gives off excess energy by a process of spontaneous electromagnetic process.

_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma

Hence, any of these particles can be released during the process of fission reaction with smaller atoms.

Therefore, the correct answer is option A.

3 0
3 years ago
Which solution when mixed with a drop ofbromthymol blue will cause the indicator to change from blue to yellow
zheka24 [161]

Answer: A

Explanation: the only way to turn it from blue to yellow is to mix it with an acidic solution.

6 0
3 years ago
Read 2 more answers
F a shell can hold a maximum of 32 electrons, what is the value of n? 2 3 4 5
Arte-miy333 [17]

Answer: 4

Explanation:

Principle Quantum Numbers: This quantum number describes the size of the orbital. It is represented by n.

Azimuthal Quantum Number: This quantum number describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic Quantum Number: This quantum number describes the orientation of the orbitals. It is represented as m_l. The value of this quantum number ranges from (-l\text{ to }+l). When l = 2, the value of m_l will be -2, -1, 0, +1, +2.

Given : a f subshell, thus l = 3 , Thus the subshells present would be 3, 2, 1, 0 and thus n will have a value of 4.

Also electrons give are 32.

The formula for number of electrons is 2n^2.

2n^2=32

n=4

Thus principal quantum no will be n= 4.

8 0
3 years ago
Read 2 more answers
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
nataly862011 [7]

Answer:

Na

Explanation:

8 0
3 years ago
Other questions:
  • Question 4 (1 point)
    12·1 answer
  • Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorim
    13·1 answer
  • Sodium burns in chlorine to form sodium chloride, NaCl. How many grams of sodium chloride will be formed when 1.8 g of sodium is
    12·1 answer
  • Why is it impossible for a gas to take the shape of its container? A. Molecules in a gas are very far apart. B. Molecules in a g
    9·1 answer
  • If the pressure of a gas is 2.43 atm what is it’s pressure in kpa
    6·1 answer
  • How many atoms make up a molecule of ethanol? (C2H6O) <br><br> 3<br> 12<br> 8<br> 9
    14·1 answer
  • Calculate the molar mass of Fe2(SO4)3. Then Calculate the mass of iron(III) sulfate of 4.05x10^23 formula units. Work must be sh
    7·1 answer
  • What is the oxidation state of S in S2032-?<br> O A. +3<br> O B. -2<br> O C. +4<br> D. +2
    8·1 answer
  • What form is the carbon prior to the lion eating the giraffe?*
    12·1 answer
  • Assertion (A): An orbital cannot have more than two electrons, moreover, if an orbital has two electrons they must have opposite
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!