Una sola dosis de etanol, C2 H5 OH, eleva el nivel intracelular de iones calcio. Los iones Ca2+ liberados por el etanol 0,10 M matan las células del hígado de las ratas. Expresa esta concentración en gramos por litro. ¿Cuál es el porcentaje en volumen? (La densidad del etanol es de 0,785 g/mL.)

Answers

Answer 1

Answer:

No se bro cual se la respuesta .......

Explanation:

lo siento(


Related Questions

If you have 3 moles of calcium carbonate, how many grams of calcium bicarbonate are formed?

Answers

Answer:

hhjcioz xlioyudiyyxyisrupautwtritu regards Roy

Consider the data [X] [Y] [Z] initial rate M M M M · s −1 Exp 1 0.30 0.20 0.35 0.210 Exp 2 0.60 0.10 0.70 0.420 Exp 3 0.60 0.20 0.70 0.420 Exp 4 0.60 0.40 0.35 0.105 What is a correct rate law for the reaction?

Answers

Answer:

Rate = k [X]⁻¹ [Z]²

Explanation:

[X] [Y] [Z] initial rate M M M M · s −1

Exp 1 0.30 0.20 0.35      0.210

Exp 2 0.60 0.10 0.70      0.420

Exp 3 0.60 0.20 0.70     0.420

Exp 4 0.60 0.40 0.35      0.105

In Experiment 2 and 3 where the concentrations of Y and Z were constant, doubling the concentration of Y had no effect on the rate of the reaction. This means, that the rate of the reaction is zero order with respect to Y.

In experiment 3 and 4, dividing the concentration of Z by 2, causes the rate of the reaction to decrease by 4. This means the rate of the reaction is second order with respect to Z.

In experiment 1 and 4, doubling the concentration of X, causes the rate of the reaction to decrease by half. This means that X has an order of -1 with respect to the rate of the reaction.

The rate expression is given as;

Rate = k [X]⁻¹[Y]⁰[Z]²

Rate = k [X]⁻¹ [Z]²

very urgent
1. Describe an experiment to show the chemical effect of electric current.
2. State three conditions necessary for combustion
3. Describe all that you observe when a piece of iron is placed in copper sulphate solution for a
few minutes.​

Answers

Explanation:

STEP 1- Take two iron nails.

STEP 2- Clean it with sand paper.

STEP 3- Wrap copper wire around both the nails. And connect the other end to the battery terminal.

STEP 4- Take water in beaker and little amount of salt in it or a few drpos of sulphuric acid in it.

STEP 5- Immerse the nails in the solution.

STEP 6- Observe the nails carefully. You can see bubbles of gases coming out from water near nails.

When, electeric current is passed through water gases like hydrogen and oxygen are evolved.

2.Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

When iron is placed in Copper sulphate solution, the iron is coated with a brown coloured substance "copper" and CuSo4 solution changes from blue to light green. This is due to iron displaces copper as it is more reactive than copper.

Does hydrogen have similar physical properties to alkali metals?

Answers

Answer:

YES

Explanation:

because it contain 1 electron in its outermost shell

what is the defination of epsom salt?

Answers

crystals of hydrated magnesium sulfate used as a purgative or for other medicinal use


It on googIe
Hope that helps
epsom salt is a crystals of hydrated magnesium sulphate used as a purgative or for other medicinal use.

MARK ME BRAINLIST

When elements are arranged according to increasing atomic number, there is a repeating, regular pattern of properties
This is called

periodic law

group

periodic table

family

Answers

Answer:

grpup

Explanation:

napagaralan namin yan

2H₂ + O₂ → 2H₂O
Convert grams of H₂ to grams of H₂O.

a. 44,680 g H₂O
b. 5,000 g H₂O
c. 345676543 g H₂O
d. 3335 g H₂O

Answers

Answer:

500100 benswuer kers olá Marilene

The mass of H₂O is 44,680 g for the given reaction 2H₂ + O₂ → 2H₂O. Therefore, the correct option is option A.

What is mass?

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the force that is applied. The change caused by either an applied force is smaller the more mass a body has.

The kilogramme, which is defined approximately equal to 6.6 × 10⁻³⁴ joule second in terms of Planck's constant, is the unit of mass inside the Worldwide System of Units (SI). A joule is equivalent to one kilogramme multiplied by one square metre per second. The mass of H₂O is 44,680 g for the given reaction 2H₂ + O₂ → 2H₂O.

Therefore, the correct option is option A.

To know more about mass, here:

https://brainly.com/question/28704035

#SPJ7

Tammy spent of her savings on a watch. She then spent-of
the remainder on a
.
5
bag. What fraction of her money did she have left?

Answers

Answer:

1 / 2 of her money would be left

Explanation:

Tammy spent 2/5 of her savings on a watch. She then spent 1/6 of the remainder on a bag. What fraction of her money did she have left?

Taking the question bits by bit;

Tammy spent 2/5 of her savings on a watch

Amount Spent = 2/5

Remainder = 1 - 2/5 = 3/5

She then spent 1/6 of the remainder on a bag

Amount Spent = 1/6  *  3/5 = 1/2  *  1/5  = 1 /10

Total amount spent = 2/5 + 1 /10 =   (4 + 1 ) / 10 = 5 / 10 = 1 / 2

Amount left = 1 - 1 /2 = 1 / 2

What is the answer to the formula 12+6/2+10?
0 25
O 14
O 19
03.6

Answers

The answer was 25

Do according to bodmas rule

which of the following is and example of a chemical property?

Answers

A-reactivity with oxygen

Nepal is rich in species diversity why?? Explain with any three reason. Help this beginer out !!!​

Answers

Answer:

Nepal is a multilingual, multiethnic, multicultural and multi-religious nation. Unity in diversity is the defining characteristics of Nepali society. Mutual coexistence, tolerance and cooperation have guided the people in achieving social cohesion, peace and happiness.

Explanation:

Please mark as brainliest!

Which of the following is considered a dilute solution? Choose all that apply.
Very sweet tea
Contact lens solution
Tide pods (laundry detergent)
Swimming pool water

Answers

Answer:

Very sweet tea

Explanation:

yeah... because sweet tea can cause tooth decay in our mouth thats why...(Please check the other answers also...Its all my point of view....thank you)

BRAINLIEST IF YOU GET IT!! 5 STARS & A THANK YOU!!
Which of the following is a distinguishing difference between rocks and minerals?
A. Minerals are aggregates of different rocks and elements.
B. Minerals have specific chemical compositions, but rocks do not.
C. Crystals are a type of rock and granite is a type of mineral.
D. Minerals are made of rocks combined in different combinations.

Answers

Answer:

B.

Explanation:

Minerals are formed due to chemical composition by rocks are pressured into their formed from dirt and naturally hard things.

The statement that represents a distinguishing difference between rocks and minerals is as follows:

Minerals have specific chemical compositions, but rocks do not.

Thus, the correct option for this question is B.

What is the difference between rocks and minerals?

A mineral is a naturally occurring substance with distinctive chemical and physical properties, composition, and atomic structure. Rocks are generally made up of two or more minerals, mixed up through geological processes.

Minerals are definitely formed due to chemical composition by rocks being pressured into their formation from dirt and naturally hard things. A rock is an inorganic and a solid naturally-formed substance without any chemical composition or atomic structure.

A mineral is also a solid, inorganic, substance as that like a rock which has a definite crystalline structure as well as chemical composition. Rocks form, break down and move through the rock cycle.

Therefore, the correct option for this question is B.

To learn more about the Rock and minerals, refer to the link:

https://brainly.com/question/15844293

#SPJ2

what’s another term for weak solutions

Answers

If u mean in terms of concentration, it will be 'Dilute'

One that is almost or entirely ionized in water is considered to be a strong acid or alkali. Nitric acid, sulfuric acid, and hydrochloric acid are a few examples. Weak solutions are not ionized in water.

What is a weak solution ?

Bases provide a similar problem: a strong base is one that is completely ionized in solution. A weak base is one that is less than 100% ionized in solution.

The fundamental elements that do not completely ionize in water are known as weak bases. Ammonia is one substance that is a weak base. A portion of NH3 that dissolves in water separates into ammonium cation.

An acid that partially separates into its ions in water or an aqueous solution is referred to as a weak acid. On the other hand, in water, a strong acid completely dissociates into its ions. While the conjugate acid of a weak base is also a weak acid, the conjugate base of a weak acid is also a weak solution.

Thus, Weak solutions are not ionized in water.

To learn more about weak solution, follow the link;

https://brainly.com/question/17141886

#SPJ2

Which processes are part of the fast carbon cycle?

Answers

Answer:

Option C

Explanation: Pass me the brainliest I only need 1

gases are also good conductors of electricity in discharge tube at
1)high pressure high voltage
2) low pressure low voltage
3) low pressure high voltage
4) never
pls help wil marks as brainliest ​

Answers

Answer:

3)low pressure and high voltage

6. El oxígeno gaseoso se calienta a presión constate de 50 °C a 300 K. Se conoce que inicialmente el volumen del sistema era de 1,3 litros. ¿Cuál es el volumen final del sistema?

Answers

Answer:

El volumen final del sistema es 1.2L

Explanation:

La ley de Charles establece que el incremento de la temperatura de un gas produce un incremento en el volumen directamente proporcional cuando la presión permanece constante. La ecuación es:

V₁/T₁ = V₂/T₂

Donde V es volumen y T temperatura absoluta de un gas en 1, el estado inicial y 2, su estado final.

Reemplazando:

V₁ = 1.3L

T₁ = 50°C + 273.15K = 323.15K

V₂ = Incógnita

T₂ = 300K

1.3L/323.15K = V₂/300K

1.2L = V₂

El volumen final del sistema es 1.2L

Water often has dissolved gases and other chemicals in it. When this water encounters rocks, the minerals in the rocks can be changed by the process of

Answers

Erosion is the best anwser for that

An iron loses electrons. State the type of charge it will end up with


write in your own words

Answers

Answer:

Most atoms do not have eight electrons in their valence electron shell. Some atoms have only a few electrons in their outer shell, while some atoms lack only one or two electrons to have an octet. In cases where an atom has three or fewer valence electrons, the atom may lose those valence electrons quite easily until what remains is a lower shell that contains an octet. Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic

What is the measurement between two points known as?

Answers

Answer:

The measurement between to points is known as the distance

Help please!! I'll name you brainliest!!

Answers

Answer:

MgO

Explanation:

ahh help, is it true or false?

Answers

I think it’s true, false, false

Clear selection
1 point
5. Choose the correct pair to
complete the given statement.
The size of the pupil _ (i) _ in
bright light to allow _ (ii) _ light
to enter our eyes.
O A. (i) increases and (ii) more
B. (i) decreases and (ii) more
O C. (i) increases and (ii) less
O D. (i) decreases and (ii) less
6. Which labelled part gives the 1 poi
human eye, its characteristic
colour
?​

Answers

Answer:

I believe it is d! Reason being, when you cover your eyes with your hands for a period if time, and then move your hands, your pupils become wide, this means that when there is light your pupils are most like decreasing in size and allowing less light! :) hope this helps

What is the meaning of this painting

Answers

Answer: things arnent always as they seem

Explanation:

SCIENCE
What is it called when two or more elements are brought together?

A. Solution.
B. Mixture.
C. Chemical reaction.

Answers

Answer:

C

chemical reaction .

Answer:

C

Explanation:

Chemical reaction.

Two forms of energy found in all systems are kinetic energy and

Answers

Answer:

Potential energy

Explanation:

Where is the youngest rock in the Atlantic Ocean found?
plz hurry

Answers

Answer:

Seafloor Ages

They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest.

hope this helped

What is the molarity of a 300.0 mL solution containing 25.0 g of NaCl?

Answers

Answer:

1,43 M

Explanation:

molair mass NaCl = 58,44 g/mol

You need to calculate how many moles 25 g is:

25 g / 58,44 g/mol = 0,4278 mol

0,4278 mol / 0,3 L = 1,43 M

Calculate the standard enthalpy of reaction
for the reaction 2 Na (s) + 2 H₂O (l)
2 NaOH (aq) + H₂ (g), Standard enthalpies
formation are -285.8 kJ/mol for H₂O and -470. 11 kJ/mol for NaOH (aq).

Answers

Answer:

-368.62 kJ/mol

Explanation:

[(2 x - 470.11 kJ/mol) ( 0kJ/mol)] - [ 2 x -285.8 kJ/mol) (2x 0 kj/mol)] = -368.62 kJ/mol

How many carbon (C) atoms are in CaCO3?​

Answers

Answer:one atom

Explanation:

The carbon symbol is C so only one

Calcium has 1 atom

Oxygen has 3 atoms

Answer:

Only one Carbon atom

Explanation:

CaCO3 is composed of one atom of Calcium, one atom of Carbon and three atoms of oxygen

Other Questions
how machines make work easier? A store has 40 bags of potato chips on the shelf. Of those bags, 30 are cheddar-flavored. What percentage of the bags of potato chips are NOT cheddar flavored? PLZ HELP ME WILL GIVE BRAINLIEST. THANKYOU!! A tank contains one hundred fifty kmol of an aqueous phosphoric acid solution with 5.00 mole% H3PO4. The solution is concentrated by adding pure phosphoric acid at a rate of 30.0 L/min. Molecular weight of phosphoric acid is 98. Density of phosphoric acid is 1.834 kg/L. Determine the mole fraction of phosphoric acid in the tank at 25 minutes. An airline company does not charge an extra fee if the weight of a passenger's luggage is less than 55 pounds.Part AOn the number line, represent the values when the airline company does not charge an extra fee.Part BCreate an inequality that represents this situation. Let p represent the weight of a passenger's luggage ype the summary of Yellowstone National Park that you were prompted to write in the lesson.The text Yellowstone National Park is included again for you below. Refer to it as needed.Yellowstone National ParkAbout the ParkYellowstone National Park is located in the states of Wyoming, Montana, and Idaho. Yellowstone was the first national park in the United States and is considered to be one of the first national parks in the world. The park contains several hydrothermal wonders, which are natural vents on the earth's surface that emit heat. Some examples of these vents include hot springs. Lakes, canyons, rivers, and mountain ranges cover more than 3,000 square miles, or five percent of the entire park. Yellowstone's wetlands provide a vital habitat for numerous insects, birds, fish, rare plants, and thermal species such as reptiles and amphibians. Visitors from all over the world flock year-round to the park to experience wildlife, hiking, snowmobiling, skiing, rock climbing, and camping. There are several designated areas throughout the 2 million acres of park where people can stay. Visitors who are as hungry as bears can dine at one of the park's many restaurants.ClimateThe climate of Yellowstone is largely influenced by its elevation. Precipitation levels change frequently and can range from little rain to downpours depending on location. The climate of the park has been gradually becoming warmer over the last 50 years. This has led to the of melting of the blanket of snow that covers the mountains, which, in turn, affects water levels, vegetation growth, and the habits of wildlife. Many species depend on deep snow to breed, raise their young, and hunt successfully. The snow provides protection and camouflage for prey and also cover for predators.Animal SurvivalYellowstone has the largest public herd of American bison in the United States. It wasn't always this way, however. While bison once roamed wild through most of North America in great numbers, an intense hunting campaign in the 1880s led to a dramatic decrease in population. By the late 1880s, only about two dozen bison were left in Yellowstone Park. In 1902, the park's management set about trying to help the bison population bounce back. By 1954, the herd had grown to over 1,000 animals. Park staff have worked hard in order to successfully bring these bison back from the brink of extinction. The bison that now live in the park feed primarily on grasses and plants in the open grasslands and meadows. They typically forage for 9 to 11 hours daily, and as a result, overgrazing is a continuous concern. Consequently, access to water is also very important to the bison herd that roams the park.Wildlife: What to DoOnce in a blue moon, you may encounter a wild animal in Yellowstone Park. Don't let curiosity kill the cat. Rule number one is to never approach the wildlife in the park. If you happen to encounter an animal on your adventures, there are a few important things to remember. These animals consider the park their home and may have babies nearby. You may seem like an intruder, and that is just the tip of the iceberg. Bison have injured more people in Yellowstone than any other animal. They are unpredictable and can run three times faster than humans. Other common animals in the park are bears. If you encounter a bear, remain calm, and try to appear nonthreatening. First, do not make direct eye contact with the bear. Next, speak to it in a calm voice so that it knows you are human. Then, leave the grounds calmly and slowly, never turning your back to the bear. Finally, if you have bear spray, remove the safety lock, and keep it on hand in case of an emergency. Ultimately, the safest way to view wildlife is from the inside of a vehicle.Water and GeysersWater plays an incredible role in the ecosystems found in Yellowstone National Park and the surrounding areas. The water that flows through the park is a vital national resource. Precipitation in the mountains flows through networks of streams and rivers to provide important moisture and habitats to plants and wildlife. The park is home to the largest concentration of mammals in the lower 48 states, including more than 150 species of birds and six species of reptiles, all of whom rely on the fresh water. Evaluate 4n when n =13 Evaluate a/b when a = 27 and b=3Evaluate 3x - 14 when x=6Evaluate z2 + 8.5 when z =2Evaluate x(36-y) when x =4 and y = 8PLEASE HELP!!! Should people just feel grateful for what they have, or do they have a right to want more? explan the class of physical fitness and its sub componts of physical fitness Why does the United States have a long history of opposition to Communist ideals? Aubrey has a new art box in the shape of a rectangular prism. The box is 12 cm by 5cm Do you think it's easier to be mean online than offline? why? HELP!!!! 100 POINTS FOR THESE QUESTIONS. CHECK PHOTO FOR QUESTIONS. GEOMETRY 1.How many inches are in a foot2.The space between the finger and the thumb is 3 1/2 inches, convert this measurement to feet3. The hand in the image is 15 inches in front of the camera. Convert this measurement to feet. 4. Write the ratio of distance from the camera to the hand to the space between the fingers. Use the measurements that were calculated in feet5. According to Wikipedia, the tower that houses Big Ben is 315 feet in height. Write a ratio of the distance from the camera to the base of the tower to the height of the tower. *hint introduce a variable on this step*6. Setup a proportion to find the distance from the camera to the base of the tower7. Solve the proportion from number 6. someone pls answer this- MUSIC WORK (SIMPLE) 5 PROBLEMS PLEASE HELP!! f(x) = -x + 2, find f(6) what are the significance of communication theory to the effectiveness communication Why are there so many different kinds of proteins when there are only 20 different amino acids ? entre las fracciones 33/96 y 34/96 podran encontrarse ms nmeros fraccionarios? cuntos? Describe Art Deco in 3 adjectivesDescribe Art Nouveau in 3 adjectives