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
kotegsom [21]
2 years ago
8

Help!

Chemistry
1 answer:
podryga [215]2 years ago
3 0
I’m pretty sure it’s 7.5 (7 and a half hours) sorry if i’m wrong
You might be interested in
Which bond is most polar?<br> ОА СО<br> ов So<br> Осно<br> ODNO
Romashka-Z-Leto [24]

Answer:

either first or second if not them try d but I'm pretty sure a also I'm sorry if I getbyou this wrong I dearly apologize

5 0
2 years ago
Explain how to use a graph to show whether or not the speed of an object is constant.
Sonbull [250]

Answer:

A horizontal line on a speed-time graph represents a constant speed. A sloping line on a speed-time graph represents an acceleration. The sloping line shows that the speed of the object is changing. The object is either speeding up or slowing down.

3 0
3 years ago
How many protons are in an element with an atomic number of 8 and a mass of 18?
Pachacha [2.7K]
B: 8 the amount of protons is equal to the atomic number
4 0
2 years ago
Read 2 more answers
Maria is baking cookies. She mixes water, flour, sugar, baking powder, butter and chocolate chips and then measures the mass of
Mrrafil [7]

Answer:

The law of conservation of mass was obeyed since some of the mass evaporated while the cookies were baking.

Explanation:

Maria mixes water, flour, sugar, baking powder, butter and chocolate chips and then measures the mass of her ingredients.

Initial mass of ingredients = 1053 g

Final mass = 845 g

All these information are not of any great help.

Law of conservation of mass states that:

For any system closed to all transfers of matter and energy, the mass of the system can not change with respect to time, as system's mass cannot change, any mass can neither be added nor be removed.

In this process of baking, considering the cookies as our system, they never formed a closed system. Hence were free for evaporation.

During the process of baking, water from dough must have evaporated and mass must have reduced.

Hence, the law of conservation of mass was not obeyed.

8 0
3 years ago
Read 2 more answers
Assume that your electrical power company gets its energy from a hydroelectric dam. Outline all of the energy changes that occur
Rina8888 [55]

Answer:

See explanation.

Explanation:

This isn't chemistry. Its physics. Kinetic energy (water) to electric energy (dam) as the hydroelectric dam works. Then, as the current travels from the plant to your crib, electric energy to heat energy (wire resistance). Then when you are using the dryer electric energy to heat energy (hot air) and sound energy (air particles vibrate due to the heat energy).

5 0
2 years ago
Other questions:
  • Mercury is often used as an expansion medium in a thermometer. The mercury sits in a bulb on the bottom of the thermometer and r
    10·1 answer
  • 2 Polnts
    14·2 answers
  • Determine the number of molecules present in 4.56 moles of nitrogen (n2).
    8·1 answer
  • This malleable metal has an atomic number of 79
    14·1 answer
  • In two or more complete sentences, explain how to calculate the amount of energy that is transferred when 150 g of cooper cools
    13·1 answer
  • How many moles are there in 545g of <img src="https://tex.z-dn.net/?f=" id="TexFormula1" title="" alt="" align="absmiddle" class
    14·1 answer
  • The interaction of the skeletal and muscular systems to create movement and locomotion is regulated by which organ system?
    11·1 answer
  • PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE H
    7·1 answer
  • If I have 3 liters of solute, and 4 liters of solvent how many liters in solution do I have?
    14·1 answer
  • PLZ ANSWER FOR BRAINLIEST
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!