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
zhannawk [14.2K]
1 year ago
11

Pls help ty so much!

Chemistry
1 answer:
Nitella [24]1 year ago
4 0

\quad \huge \quad \quad \boxed{ \tt \:Answer }

\qquad \tt \rightarrow \:mass = 11.42 \:\: grams

____________________________________

\large \tt Solution  \: :

\qquad \tt \rightarrow \: Q = ms\Delta T

  • \textsf{Q = heat evolved/absorbed = 501 J}

  • \textsf{m = mass in gram = ?}

  • \textsf{s = specific heat = 0.45}

  • \textsf{ΔT = change in temp = 120 - 22.5 =97.5°C}

\large\textsf{Find m : }

\qquad \tt \rightarrow \: 501 = m \sdot(0.45) \sdot(97.5)

\qquad \tt \rightarrow \:  501 = m \sdot43.875

\qquad \tt \rightarrow \: m =  \dfrac{501}{43.875}

\qquad \tt \rightarrow \: m  \approx11.42 \:  \: g

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

You might be interested in
Needed now can you please help me on this need help on science don't understand
puteri [66]
I think the answer is letter B.
6 0
3 years ago
Read 2 more answers
Ammonia, NH3, can be classified as a base because in a chemical reaction with an acid, ammonia will (1 point)produce hydroxide i
olasank [31]
NH will <span>accept a proton and become NH4+

Bases follow </span>B^-+H^+=BH, with B^-=NH_3 in our case.
8 0
3 years ago
Read 2 more answers
Which statements below are an appropriate hypothesis in response to this question? Check all that
lyudmila [28]
The correct statements are b, c, and e.
A hypothesis is defined as a tentative or proposed explanation for the occurrence of any phenomenon.
It is usually based on a very less number of pieces of evidence and provides the first step for further classification.
The hypothesis must be testable so that it can be accepted or rejected on the basis of scientific methods.
Thus, the correct statements are b, c, and e.
5 0
3 years ago
02.01]In the 1800s, John Dalton's atomic theory was that atoms are indivisible. Later, subatomic particles such as neutrons, ele
Luda [366]
The last one is the correct answer. The atomic structure can be broken down which is what the findings concerning protons, electrons and neutrons showed. The theory was thus modified. What remained was no chemical reaction could affect the basic structure of an atom.

Still the last choice is still true. The first choice is your second best answer because of what I wrote in the last sentence of the above paragraph. 

Last Choice <<<<< answer
8 0
3 years ago
Read 2 more answers
Cuáles son las funciones de la política...​
Stolb23 [73]

Answer:

El ejercicio de la política permite gestionar los activos del estado nacional, también resuelve conflictos dentro de las sociedades adscritas a un estado específico lo que permite la coherencia social, las normas y leyes que determine la actividad política se vuelven obligatorias para todos los integrantes del estado

Explanation:

¿Puedes darme lo más inteligente?

7 0
3 years ago
Other questions:
  • Approximately, how many national parks are there in the United States? a. 25 b. 50 c. 120 d. 474
    5·2 answers
  • Combustion reactions are a notable source of carbon dioxide in the environment. Using the following balanced equation, how many
    11·1 answer
  • Assuming the same temperature and pressure for each gas, how many milliliters of carbon dioxide are produced from 16.0 mL of CO?
    9·1 answer
  • Write the equations that represent the first and second ionization steps for hydroselenic acid (H2Se) in water. (Use H3O+ instea
    5·1 answer
  • Based on the activity series, which one of the reactions below will occur (Spontaneous)? A. Mn (s) + NiCl2 (aq) → MnCl2 (aq) + N
    15·1 answer
  • Give a brief background of the development of nuclear power.
    6·1 answer
  • What is the maximum number of covalent
    7·1 answer
  • 1. When frequency increases energy:
    12·1 answer
  • A liquid has a _____.
    10·2 answers
  • In the Tough Man Competition, very strong men are challenged to push or pull extremely large and heavy objects to test their str
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!