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
Monica [59]
3 years ago
13

How to solve 2 and 3

Chemistry
1 answer:
GarryVolchara [31]3 years ago
3 0
Use the Heat formula for both problems.

q=m*c*∆t

Where
q= heat in Joules
m= mass in grams
c= specific heat which is a constant 4.18
∆t= change in temperature
You might be interested in
what is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g​
LekaFEV [45]

Answer:

K8S4O16 or K8(SO4)4 depending on if the SO4 is supposed to represent sulfate or not

Explanation:

Find the molar mass of K2SO4 first:

2K + S + 4O ≈ 174 g/mol

Divide the goal molar mass of 696 by the molar mass of the empirical formula:

696 / 174 = 4

This means you need to multiply everything in the empirical formula by 4:

K2SO4 --> K8S4O16 or K8(SO4)4 depending on if the SO4 is for sulfate or not

4 0
2 years ago
Help plz 50 points <3
Rufina [12.5K]

Answer:

I believe the answer is the last one answer D: Neutral elements

Explanation:

Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. ... Ionic compounds are typically neutral. Ionic compounds generally form between elements that are metals and elements that are nonmetals.

Hope this helps please mark brainliest :)

8 0
2 years ago
Where does the water in air come from?
Tanya [424]

Answer:

About 90 percent of water in the atmosphere is produced by evaporation from water bodies, while the other 10 percent comes from transpiration from plants. There is always water in the atmosphere.✌️

3 0
3 years ago
__C8H18(I) + __ O2(g) —> __Co2(g) + __H2O(g) Balance out the equation
Ymorist [56]

Answer:

2C8H18(l) + O2(g)--->CO2(g)+H2O

3 0
3 years ago
A 5.5 sample of battery acid contains 490.0g of sulfuric acid H2SO4
prohojiy [21]

n =  \frac{m}{mw}  \\ n =  \frac{490}{98}  \\ n = 5 \: mol
5 0
3 years ago
Other questions:
  • A student is given two 10g samples, each a mixture of only NaCl(s) and KCl(s) but in different proportions. Which of the followi
    11·2 answers
  • Explain using the particles theory what happens when steam in the bathroom hits a cold surface such as a mirror
    9·1 answer
  • Weathering of rock and sedimentation ultimately lead to the formation of___
    8·2 answers
  • What is the molality of a solution of water and KCl if the freezing point of the solution is –3°C? (Kf = 1.86°C/m; molar mass of
    11·2 answers
  • 1. The number 0.004207, when rounded off to 3 significant figures, would appear as
    8·1 answer
  • Sodium has lost 2 electrons. What is its ion notation?
    5·1 answer
  • I need help and it for my science class
    11·1 answer
  • How many neutrons are present in an atom with atomic number 9 and mass number 19?​
    10·2 answers
  • A gas starts at a volume of 23 L and a pressure of 1.23 atm. What is the new pressure if you
    7·1 answer
  • Aluminum oxide breaks down into it elemental components when electric current is applied.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!