Answer:
D. I am pretty sure
Explanation:
:))))))
Answer:
D. A teacher lights a candle
Explanation:
Why is the temperature of products likely to be lower than the temperature of reactants in an endothermic reaction?
this is a attachment from my text book can you help me
Answer:
Looks like a mitrochondria
Explanation:
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The equation below represents the main ingredients a vendor uses to make the double cheeseburgers he sells.
1 bun + 2 hamburger patties + 2 slices of cheese à 1 double cheeseburger
The double cheeseburgers sell for $2 each. The vendor has 1326 buns, 2624 hamburger patties and 2004 slices of cheese. How much money will the vendor make selling the double cheeseburgers
Answer:______ dollars
Answer:
1326
2624÷2=1312
2004÷2=1002
1002*2=$2004
Explanation:
2004 dollars
Answer:
.-.
Explanation:
An electric current transports 0.20 kC of charge in 14.0 minutes. Calculate the size of the electric current.
Be sure your answer has the correct unit symbol and the correct number of significant digits.
PLEASE HELP ASAP!!
57. Sodium sulfate is used in the manufacture of detergents.
a. Identify each of the component elements of sodium sulfate, and write the compound's chemical formula.
b. Identify the compound as ionic or covalent.
c. Calculate the percent by mass of each element in sodium sulfate.
Answer:
See Explanation
Explanation:
The formula of sodium sulphate is Na2SO4. The component atoms in the compound are; sodium, sulphur and oxygen.
The compound is ionic. it is composed of sodium ions and sulphate ions.
The molar mass of sodium sulphate = 142 g/mol
percentage by mass of sodium = 2* 23/142 * 100 = 32.39 %
percentage by mass of sulphur = 32/142 * 100 = 22.5%
percentage by mass of oxygen = 4 * 16/142 * 100 = 45.1 %
The author wanted to revise this story to allow readers to understand more fully how Coach Wilkins felt about the banquet and his career. What change would be MOST effective? Include the point of view of the coach by adding his thoughts and dialogue. A) Remove all the details about Josh, the cafeteria workers, and Principal Edwards B) Include more information on the activities with which Coach Wilkins was involved. Change the details to have Coach Wilkins deciding to teach social studies and coach footbalL D) y Comprehension
Answer:D
Explanation:i did the usa test prep
Answer:answer is D
Explanation:
what is NaOH element
Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na + and hydroxide anions OH −
examples of type of matter that_ through the environment are carbon, nitrogen, and water
Answer:
examples of type of matter that circulate through the environment are carbon, nitrogen, and water
¿Cuál es la fórmula química del ácido perclórico?
Cuál es la fórmula química del ácido perclórico ?
[tex] \red{Answer}[/tex]fórmula química del ácido perclórico es HClO4.
Answer:
pls can I get a translation
What is the name of NaC2H3O2?
The chemical name for NaC₂H₃O₂ is sodium acetate.
Sodium acetate is a compound that consists of sodium ions (Na+) and acetate ions. It is also known by its chemical formula CH₃COONa. The compound is commonly found in both solid and aqueous forms.
Sodium acetate is produced by the neutralization reaction between acetic acid and sodium hydroxide. It can also be obtained by reacting sodium carbonate with acetic acid. The resulting product is a white crystalline solid that is highly soluble in water.
One of the notable properties of sodium acetate is its ability to act as a buffer solution, meaning it can resist changes in pH. It is often used in various applications.
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How many moles of H2 gas are generated when 4.0 moles of Na react?
2Na + 2H2O --> 2NaOH + H2
Answer:
2 moles of H2
Explanation:
From the equation
2 mol Na gives 1 mol H2
When we have 4 mole of Na then we get 2 moles of H2
Answer:
1.204 × 1024
Explanation: i just did this question
i need the answer ASAP
in the electromagnetic spectrum
Fact: wavelength range: 1cm to 1m
-radio wave
-microwave
-infrared waves
-visible light
-ultraviolet rays
-X-rays
-Gamma-rays
-cosmic rays
Answer:
Visible light
Explanation:
As mentioned in the first section of Lesson 2, our eyes are sensitive to a very narrow band of frequencies within the enormous range of frequencies of the electromagnetic spectrum. This narrow band of frequencies is referred to as the visible light spectrum. Visible light - that which is detectable by the human eye - consists of wavelengths ranging from approximately 780 nanometer (7.80 x 10-7 m) down to 390 nanometer (3.90 x 10-7 m). Specific wavelengths within the spectrum correspond to a specific color based upon how humans typically perceive light of that wavelength. The long wavelength end of the spectrum corresponds to light that is perceived by humans to be red and the short wavelength end of the spectrum corresponds to light that is perceived to be violet. Other colors within the spectrum include orange, yellow, green and blue.
Es un cambio natural o provocado, donde se produce energía para agua y dióxido de carbono: a)Precipitación. b)Fermentación c) Efervecencia. d) Combustión.
Answer:
d) Combustión.
Explanation:
¡Hola!
En este caso, dado que estamos enfocados en el concepto de cambio químico, el cual se caracteriza por exhibir un cambio en la composición e identidad de las sustancias iniciales (reactivos) a otras finales (productos).
Ahora bien, como se nos dice que los productos de este cambio químico son energía, agua y dióxido de carbono, inferimos que el nombre de este proceso es d) Combustión, por ejemplo la combustion del gas natural para calentar nuestras comidas en la cocina.
¡Saludos!
What can be concluded about the purpose many robots will have in the future
Only producers are able to capture energy from the sun and the matter from the environment to make food.How does energy that come from the sun get to every other organism?How does matter from the environment enter every other organism?
Answer:
Explanation:
Plants get energy from sunlight to produce carbohydrates. When a consumer such as herbivore consume plants, he gets energy and when a canivore or omnivore consume the primary consumer, energy is also transfered to them and this is called food chain.
Matter from the environment which include fallen leaves or trees will decompose after a while in the ground when decomposers begin to act on it and it will eventually give them energy. Decomposer help break down organic matter such as leaves,dead animals and get little amount of of energy in the energy flow pyramid
Arriving back from school, you decide to microwave a Hot Pocket for a snack. You have a
1500W microwave that took 3 minutes to cook the Hot Pocket.
Answer:
Kristy thank you doing today hope you doing recently
Radio waves, ultraviolet rays, X-rays, and gamma rays are all examples of electromagnetic radiation, as are microwaves.
What is Microwave?There are several uses for microwaves, including for communications, radar, and—possibly for the most part—cooking. Waves or particles of electromagnetic radiation with various wavelengths and frequencies are communicated.
The electromagnetic spectrum (EM spectrum) is the name given to this wide spread of frequencies. In general, the spectrum is divided into seven areas in ascending sequence of increasing energy and frequency and decreasing wavelength.
Radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays, and gamma-rays are some of the common names for these types of energy. In the electromagnetic (EM) spectrum, microwaves are found between radio and infrared light.
Therefore, Radio waves, ultraviolet rays, X-rays, and gamma rays are all examples of electromagnetic radiation, as are microwaves.
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Consider the following equilibrium: 2 NO2(g) ⇌ N2O4(g) + Energy The equilibrium will shift to left as a result of... — BRAINLIEST will be rewarded to the first to answer with the correct answer.
Answer:
C.
Explanation:
The left side has 2 mols of gas and the right only has 1. Thus increasing volume (decreasing pressure) would shift the reaction to the left
I don’t get it need some help please and thank you
Answer:
A. like poles of magnets repel each other
B. Unlike poles of magnets attract each other.
C. The magnet's force is stronger than the earth's at this distance
Explanation:
From the diagram given, we can take the portion of the compass painted red to be the north, and the porion painted white to be the south.
In the first diagram, the north of the compass gets attracted to the south of the compass showing, that unlike poles attract each other and like poles repel each other.
In the second diagram, the south of the compass needle gets attracted to the north of the magnet showing, that like poles repel each other, and unlike poles attract each other.
The mere fact that the compass needle is not pointing towards the north shows that it is being affected by the magnet placed beside it. Normally every compass held under the influence of the magnetic pull of the earth points north. But since this is not the case here, we can say that The magnet's force is stronger than the earth's at this distance
What’s a element that is a non metal, contains 7 valance electron, 3 energy levels?
The answer is Cl.
Group/family 18, the Nobel Gases, have full octets of 8 valence electrons. Each time you move to the LEFT one time within the nonmetals on the Periodic Table, an electron is lost. So, any element in group/family 17 would have 7 valence electrons (you can check this by drawing Bohr diagrams for each element within group/family 17).
So, we now know that the element is a nonmetal found in group/family 17. Therefore, it is found in the "p" block. For elements found in the "p" block, periods represent energy levels.
I was wondering what the answer for this question would be ?
Answer:
C. H2O is the base and H3O+ is the conjugate acid
Explanation:
According to Bronsted-Lowry acid-base theory, an acid is a substance that loses an hydrogen ion or proton (H+) while a base is a substance that gains an hydrogen ion (H+) or proton. Furthermore, this theory states that, the molecule formed when an acid donates its proton is called the CONJUGATE BASE, while the molecule formed when the base accepts proton is called CONJUGATE ACID.
In this question, the following equation is given:
NH4+(aq) + H2O(aq) ⇌NH3(aq) + H3O+ (aq)
Water (H2O) is the base in this equation because according to Bronsted-Lowry acid-base theory, it accepts an hydrogen ion (H+) while hydroxonium ion (H3O+) is the conjugate acid.
how many grams of copper do you have if you have 2.00 moles of copper
Answer:
We assume you are converting between moles Copper and gram. You can view more details on each measurement unit: molecular weight of Copper or grams.
2. Given the following balanced chemical equation: 3ZnO + 2Li3N
-->
Zn3N2 + 3Li20
If 3.14 g of ZnO reacts with 3.14 g of Li3N,
a. Identify the limiting reactant.
b. Identify the reactant in excess.
c. How many grams of Zn3N2 are formed?
d. How many grams of the excess reactant are needed for the reaction?
e. How many grams of the excess reactant are left at the end of the reaction?
Answer: For question, C. 224.1534
Explanation:
1 mole is equal to 1 moles Zn3N2, or 224.1534 grams.
Calculate the average reading for all three trials for both the wet bulb and dry bulb thermometers. Convert the average
temperatures for both thermometers to Celsius using this formula:
(°F - 32) = °C.
Answer: °32= 0 °C.
Explanation:
Answer:
Explanation:
Please add the temperature readings from all three trials for both thermometers. Will do the calculation with readings.
Consider the Hertzsprung Russell diagram seen here. We can use this diagram to classify stars and determine their characteristics.
The color of a star is determined by its temperature: the hottest stars are blue and the coolest are red. The Sun has a surface
temperature of 5,500°C and it appears yellow. The diagram also indicates that temperature coincides with luminosity: the hotter the
star, the higher the luminosity. You can also tell the size of each star from the graph as the larger the radius, the higher the
temperature and luminosity. Regardless of a star's position in the diagram, the energy that results in high temperatures and the stars
luminosity is generated by what process?
W
A)
nuclear fusion
B)
nuclear fission
gravitational forces of swirling gases
D)
friction generated by gravitational force
Answer:
Explanation:
A- nuclear fusion
A solution has a [OH−] of 1 × 10−12 M. What is the [H3O+] of the solution?
1 × 10−14 M
1 × 10−2 M
2 M
14 M
Answer: The awnser is B
Explanation:
A container has a volume of 2.79 L and a pressure of 5.97 atm. If the pressure changes to 1460 mm Hg, what is the container’s new volume?
Answer:
8.68 L is the new volume
Explanation:
You use Boyle's law for this.
[tex]P_{1}V_{1}=P_{2}V_{2}[/tex]
[tex]P_{1}[/tex] = first pressure
[tex]P_{2}[/tex] = second pressure
[tex]V_{1}[/tex] = first volume
[tex]V_{2}[/tex] = second volume
Convert pressure from atm to mmHg (use same units):
5.97 x 760 = 4537.2 -> 4.54 x 10³
...maintain 3 significant figures in calculation, and round as needed...
(4.54 x 10³ mmHg)(2.79 L) = (1460 mmHg)([tex]V_{2}[/tex])
(4.54 x 10³ mmHg)(2.79 L) / (1460 mmHg) = [tex]V_{2}[/tex] = 8.68 L
Hope this helps :)
which of the following measurements involve a direction? ( select all that apply)
A. acceleration
B. velocity
C. distance
D. mass
What is the molarity of a solution prepared by dissolving 10.0 grams of NaOH in enough water to make a solution with a total volume of 2.40 liters?
O0.104 M NaOH
O0.201 M NaOH
O0.361 M NaOH
O0.412 M NaOH
Solution :
Molecular mass of NaOH is 23 g/mol .
So, number of moles of NaOH is given by :
[tex]n = \dfrac{10}{40}\ mole[/tex]
Now, we know molarity is given by :
[tex]Molarity = \dfrac{Number \ of \ moles\ of \ salute}{Volume ( in \ Liter ) }[/tex]
[tex]M = \dfrac{10}{40\times 2.4} \ M\\\\M = 0.104 \ M[/tex]
Hence, this is the required solution.
Answer: The answer is A O0.104 M NaOH
Explanation:
Determine the mass in grams of Avogadro's number of C12H22O11
Answer:
2.059524x10^26 if im not wrong
Explanation:
avogadro's number is 6.022x10^23
Why is it that when you heat up a small portion of mac n cheese, it gets warmed up quickly and soon burnt. I heated up my bowl because it was getting cold, only a little in it and it got started poping after 1 second. Why is this?
another fun question, but for real, what does it mean?
Answer:
well tbh it's just the microwave doing its job heating up your Mac n cheese. But while doing so the Mac n cheese absorbs a lot of heat and then releases it by popping.
Answer:
I don't know
Explanation:
so true though