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
15

If 2.9g of water is heated from 23.9C to 98.9C, how much heat (in calories) was added to the water?

Chemistry
1 answer:
tensa zangetsu [6.8K]3 years ago
7 0

Answer:

Explanation:

we know that

ΔH=m C ΔT

where ΔH is the change in enthalpy (j)

m is the mass of the given substance which is water in this case

ΔT IS the change in temperature and c is the specific heat constant  

we know that given mass=2.9 g

ΔT=T2-T1 =98.9 °C-23.9°C=75°C

specific heat constant for water is 4.18 j/g°C

therefore ΔH=2.9 g*4.18 j/g°C*75°C

ΔH=909.15 j

You might be interested in
Explain the process of groundwater
Anon25 [30]

Answer:

Limestone is easily eroded from above and below.

Explanation:

The Florida bedrock is largely made of limestone. Because limestone is a rock that is easily eroded, the landscape of a great part of Florida is classified as karstic.

Karstic landscapes are dotted by sinkholes, underground rivers, caves, and springs. The more acidic the groundwater or rainwater, the faster and more easily the limestone will succumb to erosion.

In this way, underground rivers, streams, runoff, rain, and underground water pooled in caves have all carved out gaps and caverns in the weak limestone bedrock.

3 0
3 years ago
How many moles of hydrogen gas occupy a volume of 0.25L at STP?
Igoryamba

Answer:

There are 0,011 moles of hydrogen gas.

Explanation:

We use the ideal gas formula, with the constant R = 0.082 l atm / K mol. The STP conditions are : 1 atm pressure and 273 K temperature. Solve for the formula, n (number of moles):

PV=nRT ---> n= (PV)/(RT)

n= (1 atm x 0,25 L)/ (0,082 l atm/ K mol x 273 K)

<em>n= 0,011 mol</em>

6 0
3 years ago
How many elements are in Li2SO4?how many elements are in li2s 04 how many elements are in li2s 04 ​
Free_Kalibri [48]

Answer:

3

Explanation:

the three elements involved in this compound are Li, S, O.

lithium, sulfur, and oxygen. Which create the ionic compound, "Lithium Sulfate."

7 atoms total, since there are two lithium, four oxygen, and one sulfate atom. this is a white inorganic salt.

6 0
3 years ago
What two things always combine to form an ionic compound?
kicyunya [14]

Answer:

b.

Explanation:

Cation and anion.

For example Na+ and Cl-  -----> NaCl.

3 0
3 years ago
What is the mRNA for TTGACAAGTTAC
sertanlavr [38]

Answer:

What is the question? I don't understand what you are trying to say.

3 0
2 years ago
Other questions:
  • An empty 10 ml volumetric flask weighs 10.2634 g. when filled to the mark with distilled water and weighed again in the air at 2
    12·2 answers
  • List 10 examples of substances that are beneficial in small quantities but poisonous in large doses
    10·2 answers
  • Which is true of a mechanical wave? (Hurry up please, do quick)
    11·1 answer
  • Which is heavier Aluminum (Al) or Iron (Fe)
    5·2 answers
  • What happens when a substance undergoes a physical change?
    10·2 answers
  • In IR spectroscopy, we normally talk about "frequencies" when in reality we are referring to wavenumbers. What is the mathematic
    14·1 answer
  • How does the theory of plate tectonics help geologists today?
    5·1 answer
  • What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases?
    10·2 answers
  • How many moles of hydrogen sulfide are contained in a 77.7-8 sample of this gas?
    13·1 answer
  • Need answers for Chemistry asap. Will give brainliest.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!