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
fomenos
3 years ago
5

What is the total amount of heat required to completely melt 347 grams of ice at this melting point

Chemistry
1 answer:
hichkok12 [17]3 years ago
4 0
Finger in your username or password is not working
You might be interested in
Review the PCR (Calvin-Benson-Basham) cycle and the photochemical (light) reactions. If photosynthesizing green algae are provid
stepladder [879]

Answer:

Explanation:

THE PHOTOCHEMICAL(LIGHT) REACTIONS :This is a phase of photosynthesis where sunlight is used as a source of energy to manufacture two chemical compounds which are "Reduced nicotinamide adenine dinucleotide phosphate"-NADPH and "Adenosine triphosphate"-ATP.This phase of photosynthesis involves 4 steps or reactions which are :

STEP 1 : Activation or Energization of chlorophyll - In this reaction,chlorophyll molecules in green algae or plants absorb sunlight and become activated,that is the electrons of the chlorophyll molecule acquire solar energy and become excited.

STEP 2 : PHOTOLYSIS OF WATER - Here the energy absorbed by the chlorophyll molecules are used to split water molecules into H+ ions and OH-- ions.

STEP 3:Formation of NADPH -The hydrogen ions (H+) produced reacts with an NADP ( an electron carrier in the chlorophyll) to form NADPH.

STEP 4: FORMATION OF ATP - The high energy generated from the electron transfer process or chain is used to add a phosphate group to ADP (Adenosine dphosphate) to form ATP.

DARK PHASE :In this phase of photosynthesis,the NADPH generated in the light phase is used as a reducing equivalent to reduce CO2 to form Glucose (food) using the ATP generated as a source of energy.

7 0
3 years ago
A gas occupies 200ml at a temperature of 26 degrees Celsius and 76mmHg pressure. Find the volume at -3degree Celsius with the pr
sergey [27]

Answer:

184.62 ml

Explanation:

Let p_1, v_1, and T_1 be the initial and p_2, v_2, and T_2 be the final pressure, volume, and temperature of the gas respectively.

Given that the pressure remains constant, so

p_1=p_2 ...(i)

v_1 = 200 ml

T_1= 26 ^{\circ}C = 273+26 =299 K

T_2= 3 ^{\circ}C = 273+3 =276 K

From the ideal gas equation, pv=mRT

Where p is the pressure, v is the volume, T is the temperature in Kelvin, m is the mass of air in kg, R is the specific gas constant.

For the initial condition,

p_1v_1=mRT_1 \\\\mR= \frac{p_1v_1}{T_1}\cdots(ii)

For the final condition,

p_2v_2=mRT_2 \\\\mR= \frac{p_2v_2}{T_2}\cdots(iii)

Equating equation (i), and (ii)

\frac{p_1v_1}{T_1}=\frac{p_2v_2}{T_2}

\frac{v_1}{T_1}=\frac{v_2}{T_2}  [from equation (i)]

v_2=\frac{T_2}{T_1} \times v_1

Putting all the given values, we have

v_2=\frac{276}{299} \times 200 = 184.62 \; ml

Hence, the volume of the gas at 3 degrees Celsius is 184.62 ml.

7 0
3 years ago
Which of the following isotopes is NOT considered to be a major threat to human health from nuclear fallout? a. strontium-90 b.
Nat2105 [25]
Ohhh it’s A) strontium
4 0
3 years ago
Compare and contrast physical changes with chemical changes.
Alekssandra [29.7K]

There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

3 0
3 years ago
If a man has brown eye with the recessive gene for blue eyes (Bb), each of his sex cells will have
iren [92.7K]
B - brown eyes
b - blue eyes

If we were to fill out a punette square each of his sex cells would contain at least one brown eyed gene. 
8 0
3 years ago
Read 2 more answers
Other questions:
  • Q- 30. The number of grams of solute
    9·1 answer
  • Large-scale metamorphism is also know as _____ metamorphism. A. contact B. thermal C. regional D. nonfoliated
    9·2 answers
  • What changes occur at the molecular level when ice cream melts and forms a liquid?
    13·2 answers
  • The process by which nitrogen gas is converted to a usable form is called nitrogen
    7·2 answers
  • suppose you mix food coloring in water to make it blue. Have you made a solution or suspension. Explain........PLZ HELP
    15·1 answer
  • What is formed when water chemically combines with carbon dioxide
    11·1 answer
  • Which direction does the sun to move across the sky
    12·2 answers
  • Which of these pairs of atoms are isotopes?
    5·1 answer
  • What is the molarity of a Sodium Chloride solution if 86.00g of NaCl was dissolved in enough water to form 1000.mL of solution?
    10·1 answer
  • Which is the best reason for choosing the beaker for heating the solution?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!