Answer:
The answer is subdivided,created or destroyed
Question 2 (5 points)
(04.01 LC)
Look at the chemical equation:
2H2S + 302 - 2H2O + 2502
How many atoms of hydrogen (H) are present on both sides of the equation? (5 points)
a
2.
Ob
3
Ос
4
Od 6
Answer:
4 atoms
Explanation:
I hope it helps you!
(will mark brainliest if ou give me the right answer!!!!)
You observe your friend rub a balloon on their wool sweater and then stick it to the wall. To investigate, you set up an experiment to test whether other objects will respond in the same way when you rub them against a sweater. What is the test variable in your experiment?
A. The number of times you rubbed the object on the sweater
B. The observation that the object sticks to the wall
C. The sweater you use to rub against the objects
D. The type of objects you are testing in the experiment
Answer:
D
Explanation:
BEcause you are testing which objects will stick. Your control variable will be the sweater. And the number of times you rub the object on the sweter will not make it stick. It will make it stick for a longer period.
Answer:
D. The type of objects you are testing in the experiment
Will this reaction occur?
Ni (s) + H,O(1)
1
Yes
No
Which three things does a plant need to create a glucose molecule in photosynthesis?
Choose all correct answers.
water
oxygen
carbon dioxide
sunlight
which of the following elements forms coloured compounds. A. Normal B. Transition C. Lanthanicles D. Inner transition
Answer:
B. Transition
Explanation:
Transition elements form coloured compounds because they have unfilled d orbitals.
Why must you continue to increase the temperature as you perform distillation ?
Answer:
It is possible to separate several distinct compounds according to their varying volatilities by altering the temperature of the distillation process. A nonvolatile solute, on the other hand, will always remain in the solution if you have a nonvolatile solute in your solution.
Explanation:
Hope it helps:)
Answer:
The reason for this is that the composition of the vapor that is distilling varies continuously during the distillation
Rationalize the action of open burning
Answer:
open burning adds do our global timer adding carbons ,methane etc. to our atmosphere
also open burning is burning of unwanted material in the open air where smoke and toxins fumes are released into the atmosphere directly
Explanation:
i used the amazing internet
Compare the box on the left containing the reactants in a chemical reactions. Which box on the right is the correctly represents the products according to the Law of Conservation of mass?
A) A.
B) B.
C) C.
D) D.
Answer:
d is the right answer
please mark me brainlist
which characteristic of bones is often very different from one individual to another?
a. the number of bones
b. the cellular make up of the bones
c. the size of the bones
d. the composition of the bones
I need the circle question to be answered please help me this.
Answer:
(iii):
Reaction 1: Addition
[ We added chlorine to 2-propene ]
Reaction 2: Substitution
[ We substituted hydroxyl ion with chloride ion ]
Reaction 3: Oxidation
[ Acidified permanganate solution is a strong oxidizing agent. So we oxidized propanol to propanoic acid ]
Reaction 4: Acid - base
[ A base (Sodium hydroxide) is added to an acid (propanoic acid) to form a neutral salt ( Sodium propanoate ) ]
How long does it take for eggs to get to room temperature
Takes 30 mins for the egg to reach room temperature
What is the density of a 36 g object with a volume of 15 cm3? (Density: D = ) 0. 42 g/cm3 0. 54 g/cm3 2. 4 g/cm3 5. 4 g/cm3.
Answer:
2.4 g/cm3 is the correct answer.
Explanation:
Hope this helps
anyone have any ideas on what i should draw for my art project please let me know
Answer:
A pumpkin or a deer cus it's hunting season
Birds, Scenerys, Fish, Planets, Seas, Trees, Butterflys, BTS, Fruits, Cactus! Drawing Ideas: Imagination
Draw an object and give it a face.
Create an alternate cover to your favorite book or album.
Illustrate a scene from your favorite song.
Draw a scene or character from your favorite book.
Illustrate your favorite fairy-tale.
Invent your own insects.
Draw an intricate made up flower.
Hope this helps!
what is the differece between substance and matter?
Answer:
Anything that occupies space and has mass is matter but the matter that has specific composition and chemical characteristics is substance
Answer:
Substance: Something that has only 1 atom, for example; Water.
Matter: Made up of more than 1 atom, example; Humans
Explanation:
As said a substance is something that has only 1 atom like water or tin.
Matter is well almost everything in the universe, there's a reason some people say; This is Human Matter. I'm pretty sure it's somewhere in the bible too.
If you were to search it up the other persons answer would come up
holaaaaaaaa español doy coronaaaaaaaa
thank you for the points
Help please and thank you for who ever
Answer:the first one
Explanation:
Answer:
Ribosomes are found in both cells
AgNO3(aq) + NaCl (aq) —> AgCl (s) + NaNO3 (aq)
The equation represents a __ reaction.
A. synthesis
B. decomposition
C. neutralization
D. double replacement
Answer:
D
Explanation:
double replacement
the reactants decompose to form new substances by exchange of radicals
please help me with the second image questions it is really important and I really need it please help me out and provide me the answers for the second image two questions, looking at the first image please.
Answer:
is this exam.. are you coping..
¿que otro nombre reciben las órbitas?
What is the molarity of a HCl solution, if 28.6 mL of a 0.175 m NaOH solution is needed to neutralize a 25.0 mL sample of the HCl solution
The molarity of the HCl solution needed to neutralize 28.6 mL of a 0.175 M NaOH solution is 0.2002 M
We'll begin by writing the balanced equation for the reaction. This is given below:
HCl + NaOH —> NaCl + H₂O
From the balanced equation above,
The mole ratio of the acid, HCl (nA) = 1
The mole ratio of the base, NaOH (nB) = 1
From the question given above, the following data were obtained:Volume of base, NaOH (Vb) = 28.6 mL
Molarity of base, NaOH (Mb) = 0.175 M
Volume of acid, HCl (Va) = 25 mL
Molarity of acid, HCl (Ma) = ?The molarity of the acid, HCl can be obtained as follow:
MaVa / MbVb = nA / nB
(Ma × 25) / (0.175 × 28.6) = 1
(Ma × 25) / 5.005 = 1
Cross multiply
Ma × 25 = 5.005
Divide both side by 25
Ma = 5.005 / 25
Ma = 0.2002 MTherefore, the molarity of the acid, HCl needed for the reaction is 0.2002 M
Learn more: https://brainly.com/question/25573711
Compound Y dissolves in ethanol but not water what type of bond is Y ?
Covalent Bond.
Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).
Ethanol being both polar and non polar can dissolve covalent compound.
What is moisture in the atmosphere
Answer: MOISTURE IN THE ATMOSPHERE, in the form of water vapor, liquid water, and ice, controls most aspects of our weather and climate. ... Atmospheric moisture is expressed as clouds, precipitation, storms, weather fronts, and other phenomena.
1. Describe what happens when two substances at different temperatures come into contact. Describe how the
law of conservation of energy applies to this system.
Answer:
Explanation:
When two substances at different temperatures like into contact, the substance that is at higher temperature will transfer energy, in the form of heat, to the substance that is at lower temperature, until their temperatures get equal.
In this case, if the two substances are isolated of the rest of the universe, the law of conservation of energy states that the heat released by the substance initially at higher temperature is the same amount of heat gained by the substance originally at lower temperature.
During an experiment, a canister filled with hot water was added to a beaker filled with cold water. In which direction did the heat energy move?
A) The heat energy moved from the hot water of the canister into the cold water of the beaker.
B) The heat energy moved from the cold water of the beaker into the hot water of the canister.
Equal amounts of heat energy from each container moved in both directions
D) No heat energy moved, as it all remained in the canister of hot water.
Answer:
A
Explanation:
As per the concept of thermal energy, heat energy will be moved from hot water of canister to cold water of beaker as heat flows from point at high temperature to point at lower temperature.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.
Learn more about thermal energy,here:
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how many electrons does hydrogen need in order to have a full shell of valence electrons?
Answer:
One
Explanation:
In a hydrogen atom, the first outer shell only consists of two valence electrons, because it would already have one, the atom only needs one more.
It requires two electrons to completely occupy its outer shell, it frequently forms a single covalent bond with another atom. Because of this configuration, hydrogen can gain access to two electrons and completely occupy its valence shell.
What is Hydrogen?Hydrogen adheres to the duet rule because it only requires two electrons to completely occupy its valence shell. It deviates from the octet rule. Hydrogen only needs to form one bond. Because of this, H is always a terminal atom and never a central atom. Hydrogen is a chemical element with the symbol H and the atomic number 1.Hydrogen is the lightest element. Under normal conditions, hydrogen is a gas of diatomic molecules with the formula H2. It is colorless, odourless, tasteless, non-toxic, and extremely flammable. Hydrogen is a more environmentally friendly alternative to methane, also known as natural gas. It is the most abundant chemical element, accounting for 75% of the universe's mass. Water, plants, animals, and, of course, humans contain massive amounts of hydrogen atoms.To learn more about valence electron refer to:
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How many grams or H20 are produced if 25 grams of HCl are used?
Answer:
15.1 grams
Explanation:
Answer:
I did some research and found some things here, its another sight sort of like brainly. Hopefully this helps!
Explanation:
https://socratic.org/questions/how-many-grams-of-potassium-chloride-are-produced-if-25-0g-of-potassium-chlorate
What is the change in oxidation number of bromine in the following re-dox reaction Cl 2 +2HBr 2HCl+Br 2 A -2;0 B) -1;0 C) 0: -1 D) 0;-2
Answer:
ANSWER
ANSWER: +1
EXPLANATION
What is the change in oxidation number of bromine in the following re-dox reaction Cl 2 +2HBr 2HCl+Br 2 A -2;0 B) -1;0 C) 0: -1 D) 0;-2
for Cl 2 +2HBr 2HCl+Br 2 , the Cl in Cl2 is reduced from "0" to
"-1" and the Br in HBr is oxidized from "-1" to "0"
So the change in oxidation number is +1
Find the percent by mass concentration if the solution was prepared by dissolving 25.0 g of sugar into 100 g of water.
Answer:
25%
Explanation:
Percent by mass is looking at the percentage of mass within a a solution. So since there's 100g of water and 25 grams of sugar, you divide 25 by 100 to get the ratio. Then multiply by 100 to get the percentage.
Imagine you are an astronaut and you travel to a planet with a much larger mass than Earth. How would this affect your weight? Explain your answer. (4 points)
Answer:
Explanation:
It may not make any difference. The information missing is the radius of the planet.
However for the purposes of the question, let us assume that it is roughly the same diameter of the earth. Then the weight of anyone would increase if the mass is all that changes..
The formula governing your weight is F = G * m1 *m2 / r^2. If m1 is the mass of the planet and it increases a lot then m2 (you) should increase. The question is done by a proportion.
What types of bonds, and how many bonds, do you predict arsenic form with other elements?
Answer:
The outer-shell similarity of the two elements suggests that arsenic, like phosphorus, can form three covalent bonds per atom, with an additional lone pair of electrons left unbonded.
Atomic number: 96
Oxidation states: +3, +4
Arsenic atom can form either three or five bonds in arsenic compounds.
The number of bonds that an element will form to other elements depends on the number of electrons on the valence shell of that element. Arsenic has five valence electrons on its valence shell.We know that there is one lone pair on the valence shell of arsenic hence, the arsenic atom can form either three or five bonds in arsenic compounds.In conclusion, arsenic is an element that could form three or five bonds in its compounds.
Learn more about arsenic: https://brainly.com/question/493434