Think about exothermic reactions. Think about endothermic reactions. Compare and contrast the two. Give examples from the readings in your comparison. Also give examples from what you may already know
Answer:
any combustion reaction.
a neutralization reaction.
rusting of iron (rust steel wool with vinegar)
the thermite reaction.
reaction between water and calcium chloride.
reaction between sodium sulfite and bleach (dilute sodium hypochlorite)
reaction between potassium permanganate and glycerol.
Explanation:
You live 10.13 km from school. Convert kilometres to meters.
Answer:
10130
Explanation:
there are 1000 m in a km
Answer:
10130 meters
Explanation:
Plants cannot grow too close together because their Blank______ need to spread out and absorb nutrients from the soil.
their roots need room to spread out
Does potassium or lithium have the smaller atomic radius? Support your answer using atomic structure (ex: energy levels, nuclear charge, attraction).
Answer:
Atomic radii increase in size as you progress down the columns of the periodic table. This is because as you add more electrons, and fill more electron shells, the total radius across the atom increases.
Answer:
lithium because it atomic number is 3
How do submarine volcanoes affect autotrophic bacteria?
Answer:A large number of autotrophic bacteria—bacteria that produce their own food—live near hydrothermal vents and submarine volcanoes.
These bacteria are considered chemosynthetic, meaning they produce food from chemical reactions usually involving carbon dioxide, oxygen, or hydrogen
The word equation for the reaction of sodium with water is:
sodium + water → sodium hydroxide + oxygen.
True or false
Answer:
true
Explanation:
someone please help... ill give you a heart a five star rating and the brainliest answer
SCIENCE !!
This type of heat transfer can be seen on hot days when you see the heat waves shimmer off the pavement.
A. Heat Transfer
B. Radiation
C. Conduction
D. Convection
PLEASE HELP
The type of heat transfer you are referring to here is convection.
What coefficient should go in front of the hydrogen peroxide (H2O2 ) molecule to make the chemical equation balanced? ___ H2O2 ➞ 2 H2O + O2
Answer:
2
Explanation:
H2O2 ➞ 2 H2O + O2
The reaction is currently not balanced because the number of atoms on the reactant side is not equal to that of the product side
Hydrogen
Reactant = 2 Product = 4
Oxygen
Reactant = 2 Product = 4
Adding 2 to H2O2 balances the reaction as the number of atoms of both elements are now balanced on both sides of the equation
2H2O2 ➞ 2 H2O + O2
what are 3 pairs of atoms that will react?
Answer:
Phosphorus Trichloride, water and carbon dioxide
How does water pressure relate to depth?
1 Atoms of the same element with different numbers of neutrons are defined as:
o
neutrons
O
isotopes
O
elements
O
compounds
Answer:
The answer is B Isotopes
Can someone help me please
only wave A you have given ....wave B ?
What are two properties that make a metal a good choice to use a wire in electronics? *
Answer:
Explanation:
The two properties that make a metal a good choice to use a wire in electronics are :
ductility conductivityIron filling's were mixed together with salt crystal's What unique property of iron would be BEST to separate the fillings from the salt
Answer:
Magnetic property
Explanation:
Iron filling is a magnetic compound, unlike the salt crystals. This means they are attracted by magnets.
To separate a mixture of iron filling s and salt crystals, a magnet should be used to remove the iron fillings from the mixture.
what is the Charge of a neutral atom after 1 electron is taken away?
Answer:
+1
Explanation:
An atom is considered to be neutral before losing or gaining any electrons. They are neutral in charge because they initially have the same number of protons (with charge of +1 each) and electrons (with a charge of -1 each).
Consider charge in an electron like a balance, with positively charged protons on one side and negatively charged electrons on the other. When you have the same number of each, there is equal amounts of positive and negative charge so the atom is neutral with a charge of zero.
For example, potassium has 19 protons, and 19 electrons. This means it has 19 positive charges and 19 negative charges. If you take away one electron, it now has 19 positive charges and 18 negative charges. So there is one more positive charge than negative, which means it is now an ion (a charged atom) with a charge of +1.
PLS HELP ME ASAP PLEASE PLSSS
What are the products of the following equation?
Al2(SO4)3 + Ca3(PO4)2 ---> 2AlPO4 + 3CaSO4
6) The following questions refer to F2 and Cl2.
a. Draw the molecular model (space-filling or ball-and-stick) that would
provide the best means for comparing the differences in bond length and
bond energy.
b. Which structure has the longest bond length? Justify your answer.
c. Which bond has the greatest bond energy? Justify your answer.
d. Which structure has the least potential energy associated with its bond?
Justify your answer.
Answer:
chill
Explanation:
Imagine that one tree outside your home looks unhealthy, although all the other trees seem healthy and strong. Describe how you could apply scientific thinking to the situation to determine why only one tree looks unhealthy. Write your answer down bellow Did you: include an asking question based on your observation about trees? Include details about what kind of data you would collect answer you question? Include a plan about how you would use the data collected to answer you question? Order the steps of your scientific investigation in a logical in order Question from Calvert Learning
Answer:
Hypothesis---experiments----results----conclusion.
Explanation:
First we make a hypothesis means a statement about why the tree looks unhealthy. In this segment of scientific method we have to test the hypothesis through experimentation. After that we have to take the readings of various parts of the tree and analyze the data to find out the problem. In the next step, we have to made the results on the basis of the data that is obtained. In the last we have to write the conclusion of the analysis and see the hypothesis.
Do metals that react vigorously with acids also react vigorously with oxygen and water?
Answer: Sodium is the metal reacts vigorously with oxygen and water.
Explanation:
sodium
All objects in space obey the law of ________.
Answer:
physics, including the laws of gravity
Explanation:
What happens during the treatment step in refining crude oil for energy use?
A. Chemicals are added to the oil so that it burns more cleanly.
B. Different fractions are combined to make a variety of final products.
C. Heavy fractions are chemically “cracked" into lighter ones.
D. Crude oil is cleaned with a water mixture.
Answer:
I think its B im not sure lol but I would wait for someone that actually would know for sure
Different fractions are combined to make a variety of final products during the treatment step in refining crude oil for energy use. Therefore, the correct option is option B.
What is refining?A material or a form is purified by the process of refining, which is also maybe referred to by the mathematical word affixing. The phrase is typically used to describe a resource that is practically useable but is more valuable in its purest form.
The phrase refers to a wide range of changes, including more extreme ones as the conversion of ore to metal (for more information, see Refining (metallurgy)). Different fractions are combined to make a variety of final products during the treatment step in refining crude oil for energy use.
Therefore, the correct option is option B.
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Consider this reaction:
H2(g) + Cl2 (g) 2 HCl (g)
How many liters of HCl are produced when 11.2 L of chlorine are reacted with excess hydrogen?
(One mole of any gas occupies 22.4L under certain conditions of temperature and pressure. Assume those conditions for this
question.)
22.4L
56 L
112 L
224 L
What is the percent of oxygen in C6H12O6?
Answer and Explanation:
C6 H12 O6=6×16=96g/mol
96/180×100=53%
please help me i’m struggling
Answeeeeer:
A. cell
Explanation:
Since A is the smallest in the chart, that would correspond to the cell because thats the smallest out of Tissue, Organ and Organism.
The volume occupied by 12.5 moles of nitrogen gas at STP is liters.
Answer:
280 Liters
Explanation:
1 mole is equal to 22.4 L at STP, so you can use the equation:
12.5 moles * 22.4 L
to find out how many liters.
The volume occupied by 12.5 moles of nitrogen gas at STP is 280 Liters.
The given parameters;
number of moles of the gas, n = 12.5 molesI mole of gas at stp = 22.4 LThe volume of occupied by the nitrogen gas at stp is calculated by comparing the given number of moles to 1 moles of at standard condition (stp), as shown below;
1 moles of gas --------------- 22.4 L
12.5 moles of gas ------------ ?
= 12.5 x 22.4
= 280 L.
Thus, the volume occupied by 12.5 moles of nitrogen gas at STP is 280 Liters.
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Multiple Choice Virtual 3
1. (4.10) Which atom has the greatest nuclear charge (positive charge in the nucleus)?
a. Ar
C. S
b. Si
d. Mg
A student says that since the atomic theory is just a theory, it should not be considered useful. Which
statement best argues against the student's opinion? (2 points)
O Scientific theories change over time.
O Scientists often do not agree about specific details of scientific theories.
O Scientists often propose competing theories.
O Scientific theories do not become Scientific Laws.
O Scientific theories are the results of many experiments and observations.
Answer:
O Scientific theories are the results of many experiments and observations.
Explanation:
Going through the options;
O Scientific theories change over time.
This is true and supports the student's opinion. So wrong option!
O Scientists often do not agree about specific details of scientific theories.
This is true. However, it supports the student's opinion. So wrong option!
O Scientists often propose competing theories.
This is true. However, it supports the student's opinion. So wrong option!
O Scientific theories do not become Scientific Laws.
This is False. Theories that have withstood the test of time and countless experiments become laws. However it support's the student's opinion. So wrong option!
O Scientific theories are the results of many experiments and observations.
This is true and is against the student's opinion. This option is correct!
A violent disturbance in the atmosphere is a
eye of hurricane
surge
front
storm
Answer: Storm surge
Explanation: