please help quick the 6th question is “What is a catalyst?” (include all three parts)
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2. I know this because the delta H is a negative number. (-802.4 kJ)
3. This means that this reaction releases heat.
Related Questions
HEEELPPP!!
Explain the difference between ionic and covalent bonding using the following term(s)
A. Electronegativities
B. Types of atoms bonding
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Answer:
Explanation:
Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
Which has a larger impact on change in atomic size: moving down one period or moving across a family
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Answer:
hi this my first day, also the answer is moving one period :)
Which statement describes the Richter scale?
A. It cannot account for fault movement during an earthquake.
B. It measures large earthquakes far from the seismograph.
C. It estimates the total energy released from an earthquake.
D. It increases in magnitude as amount of damage increases.
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Answer:
D. It increases in magnitude as amount of damage increases.
Explanation:
I took the test and chose A got it wrong and it said it was D
Answer:
D
Explanation:
Sorah, Sammie,Victor, Vicki, ond Valerie are in math group. Two students are randomly picked to
be the co-captains. What is the probability thote students were ssmmie and Victor?
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Answer:
[tex]\frac{2}{5}[/tex]
Explanation:
Probability refers to chances of occurrence of any event.
Value of probability is greater than or equal to 0 and less than or equal to 1.
Probability = Number of favorable outcomes ÷ Total number of outcomes
Total number of students in math group = 5
Also, 2 students are randomly picked to be the co-captains.
Probability that students were Sammie and Victor = [tex]\frac{2}{5}[/tex]
A sample of gas at 3000.0mmHg inside a steel tank is cooled from 500.0°C to 0.00°C what is the final pressure of the gas in the steel tank
Answers
Answer:
1429.32 mmHg
Explanation:
Initial Pressure P1 = 3000.0mmHg
Initial Temperature T1 = 500.0°C + 273 = 573 K ( Converting to kelvin temperature)
Final Temperature T2 = 0.00°C + 273 = 273 K ( Converting to kelvin temperature)
Final Pressure P2 = ?
The pressure of a given amount of gas is directly proportional to the absolute temperature provided volume remains constant.
This is given by the mathematical expression;
P1 / T1 = P2 / T2
Inserting the values;
3000 / 573 = P2 / 273
P2 = 273 * 3000 / 573
P2 = 1429.32 mmHg
This image shows
an example of
petrified wood.
How did this fossil
form?
A. it formed in amber
B. it formed in asphalt
D. it formed by petrifaction
C. it formed in ice
Copyright © 2003-2021 Acellus Corporation. All Rights Reserved.
Answers
Answer:
D. it formed by petrifaction
Explanation:
Petrifaction is the process of petrifying, fossilizing, or preserving wood; hence, "petrified wood."
itssssssssss scienceeeeeee
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Answer:
C.
Explanation:
...........................
Which of these elements is a nonmetal?
Copper (Cu)
Sulfur (S)
Iron (Fe)
Aluminum (AI)
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Percentage of isotopes in 35/17 Cl and 37/17 Cl with the molar mass of chlorine as 35.5g and the mass of each nucleon to be 1.0000 amu
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Answer:
The abundance of 35/17 Cl is 75% and 25% of 37/17Cl
Explanation:
The molar mass of an atom is defined as the sum of the masses of each isotope times its abundance, that is:
35.5amu = 35amu*X + 37amu*Y (1)
Where X is the abundance of the 35/17Cl and Y the abundance of 37/17 Cl
As there are just these 2 isotopes and the abundances of both isotopes = 1:
X + Y = 1 (2)
Replacing (2) in (1):
35.5 = 35X + 37(1-X)
35.5 = 35X + 37 - 37X
-1.5 = -2X
X = 0.75 = 75%
And Y = 100-75% = 25%
The abundance of 35/17 Cl is 75% and 25% of 37/17ClWhat is the temperature in kelvin of a gas if it is allowed to expand from 1.50 L to 4.50 L? The initial temperature is 10.0°C and pressure is constant throughout the change.
Which equation should you use?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
T subscript 2 equals StartFraction V subscript 1 over V subscript 2 EndFraction T subscript 1.
T subscript 2 equals StartFraction V subscript 2 over V subscript 1 EndFraction T subscript 1.
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Answer:
first question is the third option and the second question is 849K.
Explanation:
Answer:
third option
849K
Explanation:
R4te me for 10 points and be honest with me PLEASE
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Answer:
id give you and 8 or 9 but you are really pretty tho
Explanation:
2 SO2 + O2 + 2H2O ----> 2H2SO4 what reaction is this?
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Answer: This type of reaction is a synthesis reaction.
Explanation: Reaction information:Sulfur Dioxide + Dioxygen + Water = Sulfuric Acid
If I balanced it, it would be 2SO2 + O2 + 2H2O → 2H2SO4
This artwork took six colors to complete.
Initially, the chalk used had a mass of 323.5 grams but upon completion, it's mass had dropped to 301.2 grams. What is the change in mass?
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A flat plain of cooled lava is created by
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You have the compound CH4. The first element is a
(metal, nonmetal) and the second element is a
(metal, nonmetal). You would predict that this would form a(n).
(ionic, covalent) bond.
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Answer:
1. Nonmetal
2. Nonmetal
3. Covalent
Explanation:
Methane is the molecule being described in this question. It has a chemical formula of CH4 where four hydrogen atoms are bonded to one central carbon atom. Carbon as well as hydrogen are non-metallic elements, which means that they can only share their valence electrons to form a COVALENT BOND.
A covalent bond is a type of chemical bond in which two atoms share their valence electrons. It occurs between two non-metallic atoms. In this molecule, CH4, carbon and hydrogen share their valence electrons to form a covalent bond.
Which of the following might be included in a chemical
reaction?
a
Molecules
blons
Pure elements
d
All of the above
Answers
Answer:
b) ions
Explanation:
Answer: all of the above
Explanation:
1. Which of the following statements is true about seeds?
a. Every plant produces seeds.
c. All seeds are good to eat.
b. All fruits contain many of seeds. d. all seeds has young plant, stored food and a seed coat.
2. Flowers cannot usually produce seeds unless
a. they are visited by insects.
c. they produce nectar.
b. they are on plants growing in good soil. d. the right pollen is placed on their stigmas.
3. Fertilization take place before a seed develops. Which statement describes when fertilization
occurs?
a pollen grain falls on a pistil
c. sperm in a pollen joins with an egg cell in an ovule
b. a pollen tube enters an ovary
d. an ovary becomes a fruit
4. Which of the following is NOT a factor needed by plants?
a. fire
b. nutrients
Please pasagot po ng tanong ko please
c. sunlight
d. water
5. Which is the reproduction in plants where the male and female parts of the flower are involved?
a. asexual
b. sexual
c. rhizome
d. pollination
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Answer:
1 ans: d. all seeds has young plant, stored food and a seed coat.
2 ans: d. the right pollen is placed on their stigmas
3 ans: a. pollen grain falls on a pistil
4 ans: a. fire
5 ans: b. sexual
Hope it helps,
Please mark me as brainliest
Thank you...
Find the amount of CO2 obtained
a. from the burning of a mole of carbon
b. of one kilomol of carbon
Answers
Answer:
See explanation
Explanation:
The equation of the reaction is;
C (s) + O2(g) ------> CO2(g)
a) From the equation we can see that it is a 1:1 reaction hence, 1 mole of carbon yields 1 mole of CO2
b) Similarly, 1 * 10^3 moles of Carbon also yields 1 * 10^3 moles of CO2.
Which chemical equation correctly represents the reaction that takes place when nitrogen gas and hydrogen gas are formed as ammonia decomposes? (4 points) a N(g) + H3(g) → NH3(g) b 2N(g) + 3H2(g) → 2NH3(g) c 2NH3(g) → N2(g) + 2H3(g) d 2NH3(g) → N2(g) + 3H2(g)
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Answer:
d. 2NH3(g)-N2(g)+3H2(g)Which type of energy makes the other energy forms possible?
1. Food Energy
2. Systemic Energy
3. Chemical Energy
4. Solar Energy
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Answer:
3. Chemical energy
Explanation:
WHATS #1 i need it soon:((
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Hence the answer is C
14. Triple bonds are the strongest, followed by double bonds and single
bonds are the weakest.
Explain this trend using electric force and Coulomb's Law in your
answer.
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Answer:
See explanation
Explanation:
Recall that according to Coulomb's law, energy is inversely proportional to the square of the distance separating the charges. This implies that the smaller the distance of the charges apart, the greater the magnitude of energy.
Similarly, the bond energy of a bond is inversely proportional to the bond length of the bond. The shorter the bond length of the bond, the greater the bond energy.
Triple bonds are shorter than double bonds and double bonds are shorter than single bonds. This implies that triple bonds, having the shortest bonds, also has the highest bond energy and single bonds having the longest bond length, has the lowest bond energy.
Equation for the complete chemical reaction, ionic equation, ionic net equation
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Answer:
an ionic equation is a chemical equation in which the electrolytes in aqueous solution are expressed as dissociated ions. ... Additionally, the net charge is the same on both sides of the equation.
Explanation:
So what you end up with is you always end up H+ plus OH- yields H2O, because HCl, and NaOH, since they're strong, they fully dissociate. So the Na+, and the Cl - are spectator ions. So with a strong acid and strong base, the net ion equation is always H+ plus OH- yields H2O.
How many atoms of each element are present in
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Answer:
Three lithium and one nitrogen atoms
What should scientists do if their ideas don’t agree?
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Answer:
They should test their answer over again. Same thing with math.
Explanation:
If they are doing an experiment, do the experiment over and reach out to other scientits to validate your results
Which reactant (X) is missing from the equation shown?
X+ PO4 → H3PO4
Answers
Answer:
H
Explanation:
b/c the polyatomic PO4¯³
have 3 valance number
Which affects both deep water and surface currents in the ocean? (for you: 15 points)
Question 2 options:
the wind
the temperature of the water
the Coriolis effect
None of the above
Answers
Answer:
I'd say the temperature. although if I had to choose two I would also say the wind...I'm leaning more to temperature though.
The Coriolis effect is the acceleration of the objects with the moving earth. The Coriolis effect affects both deep water and surface currents in the ocean.
What is the Coriolis effect?The Coriolis effect (also known as the Coriolis force).
It describes the apparent deflection of items traveling in a straight line relative to the Earth's surface (such as airplanes, wind, missiles, and ocean currents).
The Coriolis effect is the acceleration of the objects with the moving earth.
Thus, The Coriolis effect impacts both deep water and surface currents in the ocean.
Learn more about the Coriolis effect, here:
https://brainly.com/question/14290551
If 2.0 moles of magnesium hydroxide are present, how many moles of phosphoric acid, would be required for the reaction?
3Mg(OH)2 + 2H3PO4 Mg3(PO4)2 + 6H2O
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Answer:
1.33
Explanation:
ILL GIVE BRAINLIST PLS Question 3 of 5
Rhyolite forms as lava cools very quickly, forming holes.
Sometimes gems can form within the holes. The image
shows fire opal within rhyolite,
Which type of rock is rhyolite?
O A. Intrusive igneous
B. Extrusive igneous
O C. Metamorphic
D. Sedimentary
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Answer:
the answer is b........
explain nature
have a great day
Answers
Answer:
The phenomena of the physical world at together which includes plants, animals, the landscape, and other features and products of earth as opposed to humans or human creations
