Answer:
Explanation:
2C7H6O2 + 15O2 → 14CO2 + 6H2O.
Pleaseee helppp!!!!!
Answer:
it releases energy that is used for power
Explanation:
Answer: It releases energy that is used for power.
Explanation: https://www.investopedia.com/terms/h/hydrocarbon.asp
hi. i need help with this. i lack with this subject
Answer: It's the circulatory system
Explanation:
what is the maximum number of electrons in an atom n=4 l=1 ml=0
Answer:
18 electrons
Explanation:
when l=1, this tell you that it is "p sub shell"
Which statement about exothermic reactions is TRUE?
A.In an exothermic reaction, energy is absorbed, bonds are broken, and the temperature decreases.
B. In an exothermic reaction, energy is released, bonds are formed, and the temperature increases.
Which statement about exothermic reactions is TRUE?
A.In an exothermic reaction, energy is absorbed, bonds are broken, and the temperature decreases.
B. In an exothermic reaction, energy is released, bonds are formed, and the temperature increases.what type of nuclear
Answer:
fussion
your welcome
Using the formula velocity = distance/time, how fast does sound travel in wood given a distance of 500 m and 0.26 seconds.
A- 1,923 m/s
B- 746 m/s
C- 2,941 m/s
D- 127 m/s
Answer:
A : 1,923 m/s
Explanation:
= 500/0.26
= 1,923
HELPPPP PLEASE WILLLL GIVE BRIANLIESTTTT
We can use the formula M₁V₁ = M₂V₂ the total volume of water that will yield 0.800 M HCl. We can then subtract that from the initial volume to get how much water needs to be added.
Since M₁V₁ = M₂V₂ (starting mole× starting volume = end mole × end volume)
⇒ (5 mol)(20 mL) = (0.80 mol) V₂
100 mol/mL = 0.8 mol × V₂
⇒ V₂ = 100 mol/mL ÷ 0.8 mol
= 125 m
Since we began with 20.0 mL of water,
water needed to add = 125 mL - 20 mL = 105 mL
If a chemical reaction occurs in a flask, and the flask becomes colder, the reaction was exothermic. true or false
Answer:
false
Explanation:
hope this helps you
Answer:
False, if the flask becomes colder it's endothermic. I hope this helps! :)
Bernice created a table using her knowledge of charged and uncharged objects. Which statement best explains why the table is incorrect?
Charged Object Uncharged Object
Negatively charged attract
Positively charged repel
The negatively charged and uncharged objects do not attract.
A positively charged object attracts an uncharged object.
Both positive and negative charges repel uncharged objects.
An uncharged object neither attracts nor repels charged objects.
Answer:B
Explanation:
A positively charged object attracts an uncharged object.
A positively charged object attracts an uncharged object statement is in correct in the table. Hence option B is correct.
What are charge?Charge are defined as a subatomic particle's ability to experience force when exposed to an electric and magnetic field. The value that the atom reaches after removing or gaining electrons is known as charge. Only ions that comply with the octat rule are stable. Atoms or groups of atoms with an electric charge are referred to as ions. Cations are positive-charged ion particles. Anions are ion types that have a net negative charge.
A charged object will cause an opposing charge to be applied to an uncharged object when it is brought close to the charged one. These two things are drawn to one another because opposing charges attract one another. Other charged items are drawn to a charged object whereas uncharged objects are repelled by it.
Thus, a positively charged object attracts an uncharged object statement is in correct in the table. Hence option B is correct.
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Why is formula equation more meaningful than a word equation?
The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure.
Answer:
The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure
Explanation:
The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure
Which of the following is a liquid someone help!!!!!
what type of carbohydrates provide the body with a sustained release of energy?
Answer:
Fiber-rich, complex carbs
Complex carbs with fiber take much longer to digest than simple carbs. This helps to maintain stable blood sugar levels because sugar enters the bloodstream gradually . Complex carbohydrates provide sustained energy and help you feel fuller for longer because they are digested more slowly.
Which form of carbohydrates can your body use for energy?Glucose, also known as blood sugar, is the primary energy source for your body's cells, tissues, and organs. Glucose can be used right away or stored for later use in the liver and muscles.Carbohydrates are the body's preferred fuel source because they can be quickly converted to glucose. A light carbohydrate snack right before exercise is a good idea for quick energy. Eat protein with carbs to slow the rate at which your body absorbs them for longer-lasting energy.Fat is the most concentrated source of energy in the body, providing more than twice the potential energy of carbohydrate or protein (9 calories per gram versus 4 calories each per gram).To learn more about : Glucose
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Heat packs are used to relax muscles. Some heat packs contain iron in a small packet. To
activate this type of heat pack, you need to increase the pressure and introduce oxygen
to create iron(III) oxide which produces the heat needed for muscles to relax. This
reaction in an example of what type of reaction?
Heat packs are used to relax muscles. This reaction is an example of exothermic reaction.
What is exothermic reaction?Exothermic reaction is defined as a reaction that is chemical in nature and is characterized by the release of energy in the form of heat and light.
It can also be defined as a thermodynamic process or reaction that releases energy from system to its surroundings.
Endothermic reaction is defined as the chemical reaction in which the reactants absorbs heat energy from the surroundings to form product.
Endothermic reaction can also be defined as a reaction in which the system absorbs energy from its surroundings in the form of heat.
Being endothermic enables us to live in cooler environments and regulate our body temperatures in order to fight infection.
Thus, heat packs are used to relax muscles. This reaction is an example of exothermic reaction.
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a change in the composition of matter _____________ occurs during a chemical reaction.
Answer: During a chemical change, the composition of matter always changes
Explanation:
how many sulfide ions are in 15 dg of sodium sulfide?
There are 1.16x10²² sulfide ions (S²⁻) in 15 dg of sodium sulfide (Na₂S).
The equation for sodium sulfide is the following:
Na₂S → 2Na⁺ + S²⁻ (1)
So from equation (1), we can see that in 1 mol of sodium sulfide we have 1 mol of sulfide ions and 2 moles of sodium ions.
First, let's find the number of moles of Na₂S
[tex] n_{Na_{2}S} = \frac{m_{Na_{2}S}}{M_{Na_{2}S}} [/tex] (2)
Where:
[tex]m_{Na_{2}S}[/tex]: is the mass of Na₂S = 15 dg = 1.5 g
[tex]M_{Na_{2}S}[/tex]: is the molar mass of Na₂S = 78.0452 g/mol
The number of moles of Na₂S is (eq 2):
[tex] n_{Na_{2}S} = \frac{1.5 g}{78.0452 g/mol} = 0.0192 \:mol [/tex]
We can find the number of ions of S²⁻ with Avogadro's number, knowing that the number of moles of Na₂S is equal to the number of moles of S²⁻ (eq 1).
[tex] ions_{S^{2-}} = \frac{6.022 \cdot 10^{23} \:ions}{1\:mol}*0.0192 \:mol = 1.16 \cdot 10^{22} \:ions [/tex]
Therefore, there are 1.16x10²² sulfide ions in 15 dg of sodium sulfide.
Find more about Avogadro's number here:
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I hope it helps you!
29. Which type of orbital is shown?
Z
Y
Х
Answer:
b
Explanation:
Which of the following would not be made in a ribosome?
O enzymes
O cholesterol
O antibodies
O water-soluble hormones
Answer:
cholesterol(lipid)
Explanation:
Ribosomes are called PROTEIN FACTORY
Ribosomes are involved in protein synthesis
Any metabolite or substance protein in nature can be synthesized on ribosomes
enzymes are protein in natureantibodies are y shaped protective proteinswater soluble hormones are also amine or protein in natureSince they are protein in nature hence can be synthesized on ribosome.
WRONG OPTIONS:
CHOLESTEROL IS LIPID IN NATURE
LIPIDS ARE NOT proteins and cannot be SYNTHESIZED ON RIBOSOME
LIVER DOES THIS FUNTION OF CHLESTEROL SYNTHESIS.
How many electrons are there in an atom with 3 protons?
Answer:
3 electrons
Explanation:
For every proton there is an electron.
Answer:
3 electrons
Explanation:
atoms are neutral in electrical charge because they have the same number of electrons as protons.
what is pyruvic acid changed into in lactic acid fermentation
Answer:
pyruvic acid changes to alcohol and carbon dioxide.
Explanation:
In lactic acid fermentation, pyruvic acid from glycolysis changes to lactic acid. This type of fermentation is carried out by the bacteria in yogurt, and by your own muscle cells.
I HOPE THIS HELPS!!!!!
Alcohol and carbon dioxide are produced when pyruvic acid is fermented. The chemical process in which molecules break down is called as fermentation.
What is fermentation ?Fermentation is an anaerobic chemical process that breaks down molecules like glucose. Pyruvic acid undergoes fermentation to produced lactic acid.
More specifically, fermentation is the foaming that happens during the creation of wine and beer, a procedure that has been around for at least 10,000 years.
Pyruvic acid produced during glycolysis transforms into lactic acid during lactic acid fermentation. Alcohol and carbon dioxide are produced when pyruvic acid is fermented.
Thus, the pyruvic acid when change into lactic acid fermentation obtained alcohol and carbon dioxide.
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Why is there gold on the inside of a cell phone but plastic on the outside
Answer:
Gold is chemically stable and conducts electricity.
Small pockets of gold are used to make mobile phone circuit board.
The plastic is lined to act as antenna gate. It's what makes a phone not a calculator but a communication point, since it allows the data flow, Bluetooth connection, Wi-Fi. Mainly, it allows radio waves to flow.
a neutral atom of astatine would have how many electrons?
Answer
85
Explanation:
Astatine has an atomic number of 85.
This means it has 85 positively charged protons.
If it is neutral, it must have the same number of negatively charged electrons, or 85
The organelle that serves as a microtubule organizing center during cell division is the
Answer:
Centríolo. Los Centríolos son orgánulos tubulares (en pares de dos en dos) que se encuentran en el citoplasma de las células animales, cerca de la membrana nuclear. Los centriolos tienen la función de organizar los microtúbulos, que son el sistema esquelético de la célula.
Explanation:
Espero te ayude
Which traits does the western harvest mouse have that might be adaptive for the environment where it lives?
Its tail helps it climb down the tall grasses and lets it swing from the grass like a monkey in a tree
Explanation:
Answer:
Into the adaptive Trait!
Explanation:
Question 116 g of sunflower oil is
used in a recipe. The density of the
oil is 0.925 g/mL. What is the volume
of the sunflower oil in mL?
Explanation:
Volume = mass ÷ density
= 116 g ÷ 0.925 g/mL
= 125.41 mL
A 116 g of sunflower oil of 0.925 g/mL has a volume of 125.41 mL.Would a 5-pound bag of iron nails be as dense as a single iron nail?
Answer:
Yes
Explanation:
mixing agno3 and nacl will produce what white precipitate.
What forms a weak acid?
(Hint: Carbonation)
A) carbon dioxide/iron
B) carbon dioxide/water
C) carbon dioxide/materials
D) Oxygen/rust
What are the atoms of Fe(SCN)3
Answer:
55.845
Explanation:
yep
Calcium carbonate decomposes into calcium oxide and carbon dioxide when heated. Calculate the mass of carbon dioxide released when 300 g of calcium carbonate is heated.
Write a Balanced Equation for the decomposition
CaCO₃ → CaO + CO₂
Find Moles of CO₂ Produced
Since the mole ratio of CaCO₃ to CO₂ is 1 to 1,
the moles of CaCO₃ = moles of CO₂
moles of CaCO₃ = mass ÷ molar mass
= 300 g ÷ 100.087 g/mol
= 2.997 moles
∴ moles of CO₂ = 2.997 moles
Determine Mass of CO₂
Mass = moles × molar mass
= 2.997 mol × 44.01 g/mol
= 131.9 g
∴ when 300 g of calcium carbonate is decomposed, it produces 131.9 g of carbon dioxide.
Why is oil found in Middle East but not in Hawaii
