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
Softa [21]
3 years ago
7

How many joules of heat are required to raise the temperature of 320.0 grams of water from 24.2°C to 50.8°C? Heat capacity of wa

ter is 4.2 J/g°C.
Chemistry
1 answer:
balu736 [363]3 years ago
5 0

Answer:

35750.4 Joules

Explanation:

Using the formula as follows;

Q = m × c × ∆T

Where;

Q = amount of heat (joules)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

According to the provided information,

mass (m) = 320.0 grams

c = 4.2 J/g°C

∆T = (50.8°C - 24.2°C) = 26.6°C

Q = ?

Using; Q = m × c × ∆T

Q = 320 × 4.2 × 26.6

Q = 35750.4 J

You might be interested in
Any help with these questions would help i'm lost
SSSSS [86.1K]

Answer:

1.  31.25 mL

2.  1.98 g/L

3.  0.45 g/mL

Explanation:

For each of the problems, you need to perform unit conversions.  You need to use the information given to you to convert to a specific unit.

1.  You need volume (mL).  You have density (g/mL) and mass (g).  Divide mass by density.  You will cancel out mL and be left with g.

(50.0 g)/(1.60 g/mL) = 31.25 mL

2.  You are given grams and liters.  You need to find density with units g/L.  This means that you have to divide grams by liters.

(0.891 g)/(0.450 L) = 1.98 g/L

3.  You have to find density again but this time with units g/mL.  Divide the given mass by the volume.

(10.0 g)/(22.0 mL) = 0.45 g/mL

5 0
3 years ago
Every atom has atleast two shells ?
VladimirAG [237]
Nope. Hydrogen has one.
4 0
3 years ago
Read 2 more answers
When comparing Potassium (K) and Calcium (Ca) you must compare?
Rom4ik [11]
Vitamin K and potassium are essential micronutrients the body needs to develop and function properly. The two share some things in common, but they’re not the same.

Each has a unique set of properties and purposes. Unlike vitamin K, potassium is not a vitamin. Rather, it’s a mineral.

On the periodic table, the chemical symbol for potassium is the letter K. Thus, people sometimes confuse potassium with vitamin K.

This article highlights some of the main similarities and differences between vitamin K and potassium.
8 0
2 years ago
N2 + 6e → 2N-3
sveta [45]

Answer:

The correct answer is reduction.

Explanation:

Nitrogen gas reacts with hydrogen gas and get reduced to form ammonia. In this reaction.This is important reaction of atmospheric nitrogen fixation.The reaction is carried out by many nitrogen fixing bacteria such as Azotobacter,Clostridium etc.

        N2+3H2+6e-  =  2NH3

4 0
3 years ago
The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows: 2C8H18 (l) 25 O2(g) --> 16 CO2
Svet_ta [14]
The ratio of mole number of the reactants and products is equal to the coefficients. So the answer is a. 18.75 mol. b. 35.1 g. c. 1.38 * 10^5 g.
7 0
3 years ago
Read 2 more answers
Other questions:
  • The reaction PCl3(g)+Cl2(g)???PCl5(g)
    6·2 answers
  • Sayid's job is to manage the trees on a Christmas tree farm. Sayld goes through the
    7·1 answer
  • Manganese forms several oxides when combined with oxygen. One of the oxides (Oxide 1) contains 63.2% of Mn and another oxide (Ox
    11·1 answer
  • Which best describes a compound such as sodium chloride
    14·1 answer
  • What's another way to increase the solubility of a solid solute without increasing the temperature?
    7·1 answer
  • How many moles are there in 1.68 * 10 ^ 24 molecules of nitrogen dioxide?
    9·1 answer
  • Please help I will give brainliest!
    14·1 answer
  • A radioactive isotope has a half-life of 2 minutes. How many total minutes will it take for 100-g of the isotope to get to just
    10·2 answers
  • At what temperature does a heat pump become ineffective?
    11·2 answers
  • What is the percent oxygen in something made of 2 mole of copper and 1 mole of oxygen called copper (l) oxide?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!