Burning hydrogen is an example of a chemical reaction. The reaction is
shown in the diagram. Which of the following statements about energy in
this reaction is the most accurate?
Answers
There is no energy in this reaction
Related Questions
Which of the following best describes the forces when there are different-sized forces from opposite directions acting on an object?
Answers
Answer:
it is magnetic force
Explanation:
Magnetic force is the best force when there are different sized forces from opposite direction acting on an o jet it only work when the object is metal like iron nail,aluminium etc
A gas sample has a volume of 25.0 milliliters at a pressure of 1.00 atmosphere. If the volume increases to 50.0 milliliters and the temperature remains constant, the new pressure will be
Answers
Answer:
P2 = 0.5
Explanation:
V1 = 25.0ml (must be convert to L) = 0.025L
P1 = 1.00 atm
V2 = 50.0ml = 0.05L
P2 =?
To calculate this question, must follow this equation below
P1V1 = P2V2
1.00 x 0.025 = P2 x 0.05
0.025 = P2 x 0.05 (divided both sides by 0.05 to left P2)
0.5 = P2
So 0.5 is the answer!
What happens to the mass, volume, and density of a solid object that is cut in half?
Answers
Answer:
The density remains the same
HCl + CaCO3 → CACl2 + H2O + CO2 balance this equation
Answers
Answer:
Balance the equation: CaCO3 + HCl → CaCl2 + H2O + CO2 -
Explanation:
Answer:
2HCl + CaCO3 → CaCl2 + H2O + CO2
That's the balanced equation
Sodium and potassium ions do not diffuse in equal numbers through ligand-gated cation channels. Why?.
Answers
Answer:
The inside surface of the sarcolemma is negatively charged compared to the outside surface. Sodium ions diffuse inward along favorable chemical and electrical gradients.
Explanation:
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Write the balanced equation for the ionization of the weak base pyridine, c5h5n , in water, h2o. Phases are optional.
Answers
The balanced equation for the ionization of the weak base pyridine,C5H5N in water, H2O
C_5H_5N ( aq.) + H2O ( l) ---------> C5H5NH+ (aq.) + OH- (aq.)
What is the balanced equation for the ionization?Generally, Pyridine is characterized by a ring structure, in this characteristic ring structure N is sp2 hybridized, hence creating a lone pair present on N so s - character is more, as well as lone pair, is present.
Therefore, Considering The following functions of the equation:weak base pyridine,C5H5N in water, H2O
We write the balanced equation for the ionization as
C_5H_5N ( aq.) + H2O ( l) ---------> C5H5NH+ (aq.) + OH- (aq.)
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What happens at a convergent boundary?
A. Two tectonic plates are combined to form a single plate.
B. Two tectonic plates are pulled away from each other.
C. Two tectonic plates move past each other horizontally.
D. Two tectonic plates push against each other.
Answers
According to a ph scale, which ph would be the strongest acid?.
Answers
PLEASE JUST PLEASEEE ANSWER THEM PLSSSS!!! I can’t fail bro plsss
Answers
Explanation:
K = °C + 273
1. -234 + 273 = 39K
2. 84 + 273 = 357K
3. 70 + 273 = 343K
4. -24 + 273 = 249K
5. 134 + 273 = 407K
6. 120 + 273 = 393K
-234 °C = 39K
84 °C = 357K
70 °C = 343K
-24 °C = 249K
134 °C = 407K
120 °C = 393K
Answer:
-234°C = 39K
84°C = 357K
70°C = 343K
-24°C = 249K
134°C = 407K
120°C = 393K
Explanation:
Hope it helps:)
A gas at a constant pressure occupies 2.24 L at 52 C. If the sample is cooled until it
takes up 1.66 Lwhat is the new temperature?
Answers
The new temperature of the gas is -32.15 °C or 240.85 K.
The new temperature of the gas can be calculated using the mathematical representation of Charles's law
Charles's lawCharles's law states that at constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute temperature.
Formula:
V/T = V'/T'................ Equation 1Where:
V = Initial volume of the gasT = Initial temperature of the gasV' = Final Volume of the gasT' = Final temperature of the gas.Make T' The subject of the equation
T' = V'T/V............. Equation 2From the question,
Given:
V = 2.24 LV' = 1.66 LT = 52 °CWe need to convert the initial temperature T above from °C to Kelvin (K) by adding 273.
T = (273+52) = 325 KSubstitute these values into equation 2
T' = (1.66×325)/2.24T' = 539.5/2.24T' = 240.85 K.T' = -32.15 °C.Hence, The new temperature of the gas is -32.15 °C.
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Chemical molecules that impart positional information through their concentration gradient are called
Answers
Chemical molecules that impart positional information through their concentration gradient are called morphogens.
What are morphogens?
In cells of living organisms, positional information are transported through changes in the concentration gradient of morphogens.
The presence of morphogens in a tissue helps to monitor the pattern of development of that tissue.
This chemical molecule embryology because it imparts the positional information of an embryo resulting to cells differentiating at specific positions.
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Those molecules that we can glean information about their position via concentration gradient are called morphogens.
What is concentration gradient?The term concentration gradient refers to the difference in the amount of substance on two different sides. This gradient could be used to glean useful information about the molecule position.
Chemical molecules that impart positional information through their concentration gradient are called morphogens.
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A particle-level diagram of a metallic element is shown above. Typically, metals are both malleable and ductile. The best explanation for these properties is that the electrons involved in bonding among metal atoms are:.
Answers
The best explanation for these properties is that the electrons involved in bonding among metal atoms are valence electrons as per the characteristics of metals.
An element is the simplest form of matter.Elements are further classified as metal,non -metals and metalloids. Metals possess luster and are malleable that is they can be drawn into thin sheets.They are also ductile and can be drawn into thin wires and are hard due to the strong ionic bonding present in them.
The unique characteristics of metals are due to the presence of valence electrons present in their atoms.
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Convert 30.0g NaNO3 to moles
please help
Answers
Answer:
0.4moles
Explanation:
1 grams NaNO3 to mol = 0.01177 mol
30 grams NaNO3 to mol = 0.35296330934634 mol
but if we round that up it is 0.4moles
a. correctly write the formula for the reactants and products
b. predict the type of reaction
Answers
Answer:
[tex]Cu(NO_{3} )_{2} + 2NaOH = Cu(OH)_{2} + 2NaNO_{3}[/tex]Double displacement reactionExplanation:
A double displacement reaction is a reaction in which exchange of ions takes place
Sodium in sodium hydroxide displaced copper in copper(II)nitrate to form sodium nitrate and copper replaced sodium to form copper(II)hydroxide
Type the correct answer in the box. Express your answer to three significant figures. Calcium nitrate reacts with sodium phosphate to form sodium nitrate and calcium phosphate. Given 96. 1 grams of calcium nitrate, what’s the theoretical yield of calcium phosphate? Use the periodic table and the polyatomic ion resource. The mass of calcium phosphate the reaction can produce is grams.
Answers
6.07 grams is the theoretical yield of calcium phosphate (Ca₃(PO₄)₂).
How we calculate mass from moles?Mass of any substance can be calculated by using moles as:
n = W/M, where
W = required mass
M= molar mass
Given chemical reaction is:
3Ca(NO₃)₂ + 2Na₃PO₄ → 6NaNO₃ + Ca₃(PO₄)₂
From the stoichiometry it is clear that:
3 moles of Ca(NO₃)₂ = produce 1 mole of Ca₃(PO₄)₂
Given mass of Ca(NO₃)₂ = 96.1g
Mole of Ca(NO₃)₂ = 96.1g/164g/mol = 0.5859moles
So, 0.5859 moles of Ca(NO₃)₂ = produce 0.5859×1/3 = 0.0196 moles of Ca₃(PO₄)₂
Required mass of Ca₃(PO₄)₂ will be calculated by using moles as:
W = 0.0196mole × 310g/mole = 6.07 grams
Hence, 6.07 grams is the theoretical yield of calcium phosphate.
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Which of the following is a correct procedure for the operation of a microscope?
A.
First, put the specimen into focus using a low power lens, then switch to a higher power lens, if needed.
B.
Remove and add slides while the high power lens is selected.
C.
Use the fine focus knob with the low power lens and use the coarse focus knob with the high power lens.
Answers
Good luck :)
HELP ASAP WILL MARK BRAINLIEST!! Copper reacts with sulfur to form copper (I) sulfide, according to the balanced equation below. 2Cu S → Cu2S Given that there are 40. 2 g Cu and 14. 1 g S, complete the steps below to determine the limiting and excess reactants in the last question. How many moles are in 40. 2 g Cu? mol Cu How many moles are in 14. 1 g S? mol S.
Answers
Answer:0.633 and 0.440
Explanation:
Answer:
Explanation:
0.633 and 0.440
For the next one, it is
Copper and sulfur
Your welcome
Ammonia (NH3(g), Delta. Hf = –46. 19 kJ/mol) reacts with hydrogen chloride (HCl(g), Delta. Hf = –92. 30 kJ/mol) to form ammonium chloride (NH4Cl(s), Delta. Hf = –314. 4 kJ/mol) according to this equation: NH3(g) HCl(g) Right arrow. NH4Cl(s) What is Delta. Hrxn for this reaction? kJ.
Answers
The change in enthalpy of the given reaction is 175.91 kJ/mol, which shows that reaction is exothermic.
How we calculate ΔH for the reaction?Change in enthalpy for the overall reaction will be calculated as:
ΔH = Enthalpy (H) of the product - Enthalpy (H) of the reactant
Given chemical reaction is:
NH₃(g) + HCl(g) → NH₄Cl
Heat of enthalpy of NH₃ = -46. 19 kJ/mol
Heat of enthalpy of HCl = -92. 30 kJ/mol
Heat of enthalpy of NH₄Cl = -314. 4 kJ/mol
Enthalpy of the reaction is calculated as:
ΔH = -314. 4 - [-46. 19 + (-92. 30)]
ΔH = -314. 4 - (-138.49)
ΔH = -175.91 kJ/mol
Hence, ΔH for the reaction is -175.91 kJ/mol.
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Scandium oxide is insoluble in water. Describe how you could show that it is an amphoteric oxide
Answers
Answer:
If it can react with acid as well as a base then the compound is said to be amphoteric
Explanation:
Answer:
what is a computer name tag type of computer
How noble gases are important for the stability of an atom?
Answers
Answer:
they are most stable
Explanation:
due to having maximum number of valence electrons their outer shell can hold.
they rarely react with other elements since they are already stable.
Describe haw an increase in burning fossil fuels would affect atmosphere temperatures
Answers
Answer:
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming. Already the average global temperature has increased by 1C.
Explanation:
Identify important characteristics, chemical properties, physical properties, pH ranges, and examples of acids and bases.
Answers
Answer/Explanation:
Acids:
Physical ⇒ Sour Taste, Increases the concentration of hydrogen ions when added to water
Chemical ⇒ Corrosive (Burns your skin and breaks down other materials), Forms hydrogen gas when it comes in contact with a metal, Forms salt and water when added to a base
Example: Tomatoes
Bases:
Physical ⇒ Bitter taste ( Never taste or smell a substance unless your parent/guardian tells you that it is okay), Slippery feeling(never touch a substance unless your parent/guardian tell you that is okay)
Chemical ⇒ Increases the concentration of hydroxide ions when added to water, Forms salt and water when added to an acid
Example: Soap, Clorox
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What are the difference between malachite and pyrite and how they are alike
Answers
We can confirm that malachite and pyrite are similar in that they are both carbonate minerals, they differ however in chemical composition and characteristics.
What is malachite and pyrite?Pyrite is a form of iron sulfide. This mineral has come to be known as the fool's gold, for its striking resemblance to gold. Malachite, on the other hand, has been known to closely resemble emeralds and is often used as a gemstone. They are both carbonate minerals, but malachite is copper-based, giving it a different chemical composition and properties.
Therefore, we can confirm that malachite and pyrite are similar in that they are both carbonate minerals, they differ however in chemical composition and characteristics.
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Calculate the amount of CO2 made when 6.4g of methane is burnt
Answers
Answer:
Balanced equation: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l). 1mol CH4 reacts with 2 mol O2 to produce 1 mol CO2. Molar mass O2 = 32g/mol.
Explanation:
hope it helps you
Which of the following samples contains the largest number of atoms A 2.5mol CH4 B 10.0mol He C 4.0mol SO2 D 1.8 mol S8 E 3.0mol NH3
Answers
Answer:
1.8 mole of S8Explanation:A) 2.5×5=12.5B) 10×1=10C) 4×3=12D) 1.8×8=14.4so d) is correct
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How is desalination different from water reclamation? a. desalination is less expensive than water reclamation. b. desalination recharges aquifers. c. desalination provides water suitable for drinking. d. none of the above please select the best answer from the choices provided a b c d
Answers
Desalination is different from water reclamation because desalination provides water that is suitable for drinking. Hence, the correct option is C.
What is Desalination?
Desalination is the process of removing salts or other minerals and contaminants from seawater, brackish water, and wastewater effluent and it is an increasingly common solution to obtain fresh water for human consumption and domestic/industrial utilization.
Water reclamation is the process of converting municipal wastewater (sewage) or industrial wastewater into water that can be reused for a variety of purposes. Water reclamation is also known as wastewater reuse, water reuse, or water recycling.
On the other hand, Desalination is an expensive process. Desalination is an artificial process and would not add back to groundwater storage. Desalination provides water suitable for drinking.
Therefore, desalination is different from water reclamation because desalination provides water that is suitable for drinking. Hence, the correct option is C.
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Answer:
C
Explanation:
Edge 2022 Trust the process
who wants to be a doctor
Answers
Answer:
maybe, but id rather do automotive stuff, thats my second option.
Explanation:
What evidence supports the hypothensis that dogs might use a magnetic sence to navigate
Answers
Answer:
Explanation:
Yes, a new research indicates that dogs might use a magnetic sense to navigate. Dogs has world class nose which helps them to navigate to their destination but it also has a magnetic compass that helps them in navigation. The dogs use magnetic field of the earth to find out shortcut ways in the unknown land or terrain so the hypothesis is right that dogs used magnetic sense for navigation.
please answer below the question
Answers
Answer:
A) air
Explanation:
What is a mixture?
A mixture is a combination of two or more elements that have not chemically combined with one another. Each element in the mixture still has its own properties.Examples: Air; air is made of nitrogen, oxygen, CO2, and more, but they haven't chemically combinedWhat is a compound?
A compound is a substance that is made by two or more elements chemically combining with one another.Which particle has a mass of
9.11 x 10-28 g and charge of -1?
electron
proton
neutron