Answer:
•How do you find the delta H per grams in an chemical formula
➢ Subtract the sum of the heats of formation of the reactants from that of the products to determine delta H: delta H = –110.53 kJ/mol – (–285.83 kJ/mol) = 175.3 kJ.
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#CarryOnLearning
Find the place of the digit 1 in the number 81389398.
Select the correct answer below:
billions
hundred millions
ten millions
millions
hundred thousands
Answer:
millions
Explanation:
the 1 is seven decimbal places to the left (seven places left of zero), which is the millions place
help ASAP 100 POINTS AND BRAINLEST IF CORRECT! Classification Activity Worksheet
Instructions: Read each myth (untruth). Reword it to make a factual statement. Then, give two to three reasons why the myth is untrue. Use complete sentences and support your answer with evidence, using your own words.
For example:
Myth: A dead organism is the same as a nonliving thing in science.
Fact: A dead organism is not the same as a nonliving thing in science.
Evidence: (You can find evidence in Lesson 5.03. Explain why this evidence supports the fact statement.)
Myth: A dead organism is the same as a nonliving thing in science.
Fact:
Evidence:
Myth: The Linnaeus system of classification will always stay the same.
Fact:
Evidence:
Myth: Tigers and goldfish are not related.
Fact:
Evidence:
Myth: An organism's kingdom only describes physical characteristics.
Fact:
Evidence:
Myth: Mammals and plants don't belong in the same domain.
Fact:
Evidence:
Your Turn
Come up with another myth about the classification of organisms. Then, give two to three reasons why the myth is untrue. Use complete sentences and support your answer with evidence, using your own words.
Your myth:
Fact:
Evidence:
As per questions,
• Myth: A dead organism is the same as a non-living thing in science.
Fact: A dead organism is not the same as a non-living thing in science.
Evidence: A dead organism means that it was once alive, whereas a non-living thing has never been alive.
• Myth: The Linnaeus system of classification will always stay the same.
Fact: The Linnaeus system of classification will pass on .
Evidence: Its new species are being found. Also, Carl Linnaeus came up with a sequential classification of living organism under different taxons namely Kingdom, phylum, class, order, family, genus and species.
• Myth: Tigers and goldfish are not related.
Fact: Tigers and goldfish are related
Evidence: They fall into the same category of vertebrates, which means that both creatures have spines, and internal bone structure.
• Myth: An organism's kingdom only describes physical characteristics.
Fact: An organism's kingdom not only describes physical characteristics.
Evidence: This is evident by that both plant and animal kingdom are classified on the basis of photosynthetic ability. Besides physical characteristics, it also describes its mode of nutrition and food characteristics.
• Myth: Mammals and plants don't belong in the same domain.
Fact: Mammals and plants belong in the same domain.
Evidence: Plants have cells, nucleus, breathing and respiratory capabilities just like mammals.
---------------------★------------------
Your myth: Animals are not related to humans.
Fact: Animals are indirectly related to humans.
Evidence: Humans possessess some unique features found in other species, hence, we are related to apes. At the known time, chimpanzees is our closest relative, and we share up to 98% of the DNA sequence with them.
I GIVE BRAINLY Which statement best defines visible light? (1 point) O a type of atom found in energy O a form of energy that allows people to see O a distance between one part of a wave and another O a change in direction of light when it strikes an object
Answer: A form of energy that allows people to see
Explanation:
Nicki Minaj
Arturo viewed a world map showing the distribution of water scarcity. He knows that certain areas have little trouble with water scarcity, while others
have difficulty finding usable water.
The continent most affected by the water scarcity is __________
Answer:
Prolonged and potentially destabilizing water shortages will become commonplace in Jordan by 2100, new research finds, unless the nation implements comprehensive reform, from fixing leaky pipes to desalinating seawater. Jordan’s water crisis is emblematic of challenges looming around the world as a result of climate change and rapid population growth.
Explanation:
Add the phrase that completes the thought in the underline sentence. Lin never forget how it felt.
Lin never forgot how it felt to be left out
Answer:
to be left out
Explanation:
Lin never forgot how it felt to be left out.
In the paragraph given, we see Lin being left out of a play. She wanted to be Dorthy but was told she couldn't. This led to feelings of being left out.
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.
- Heather
What is the percent of calcium ion in Ca3(PO4)2
Answer:
Therefore, we can write that the mass percentage of all the elements in calcium phosphate is 38.71% calcium, 20% phosphorous and 41.29% oxygen.
Explanation:
hope it will help you have a great day bye and Mark brainlist if the answer is correct
[tex]kai6417[/tex]
#carry on learning
Give the stoicometric coefficient for oxygen when the following equation is balanced causing the lowest whole-number coefficients: _____C3H8O(l) + _____O2(g) ——> CO2(g). + _________H2O(l)O2
Answer:
2 C3H8O + 9 O2 --> 6 CO2 + 8 H2O + 1 O2
Explanation:
How many iron atoms are in 7.890 g of iron?
Answer:
mole = reactingmass = 7.890= 0.142 mol
molarmass 55.8
atoms = mol × alvagadro constant
0.142 × 6.02 × 10^23
=8.5484 × 10^22 Atoms
15.0 L of an ideal gas at 298 K and 3.36 atm are heated to 383 K with
a new pressure of 6.00 atm. What is the new volume in liters?
Answer:
Is the new volume, 10.80L?
Explanation:
But if wrong just ignore honestly.
Fill in the reaction type and predicted products for:
H2SO3 (aq) + Mg(OH)2 (aq) → ??
Type in the IUPAC name or formula for each product.
Write subscripts as normal numbers.
If there is no second product, type "nothing".
The reaction type is
Question Blank 1 of 3
.
The correct products are:
Question Blank 2 of 3
and
Question Blank 3 of 3
How many grams are in 8.23 moles of sodium oxide?
Answer:
So, the mole ratio between sodium and sodium oxide is 2:1=2
Explanation:
Answer:1 moles Sodium Oxide = 61.97894 gram
Explanation: got it from my teacher
It is a full moon on Jan 15th. How many days will it be until the next full moon?
Answer:
29.5 days
Explanation:
How often does a full Moon occur? A full Moon happens roughly every 29.5 days. This is the length of time it takes for the Moon to go through one whole lunar phase cycle.
An atom has atomic number 5 and mass number 11. How many neutrons does the atom have?
A- 5
B- 6
C- 10
D- 11
Answer:
B
Explanation:
neutrons + atomic number/proton/electron for a neutral atom = mass number
e.g
mass number of Chlorine 35.5
proton number 17
neutron number will be 35.5-17 = 18.5
Therefore.....
your question deduced says
atomic number is 5
mass number is 11
neutron number is however mass number minus atomic number 11-5 =6
J. A gas has a volume of 12 L at 200°C with 6.0 atm.
If volume remains constant, what pressure will the gas
have at 50°C?
Gay Lussac's Law
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Convert:
200°C = 200 + 273 = 473 K
50°C = 50 + 273 = 323 K
Input the value:
[tex]\tt \dfrac{6}{473}=\dfrac{P_2}{323}\\\\P_2=4.097~atm[/tex]
Answer:
[tex]0.4 \: [/tex]
Explanation:
I only know this answer hope it will help you if it's wrong I am sorry:(
[tex]kai6417[/tex]
charged group of more than one type of element
a. Manatomic ion
b. Rpluction
c. Polyatomic ion
d. Oxidation
Answer:
C polyatomic ions are made up of more than one atoms. The correct options are,
Explanation:
Polyatomic ions have many charges.
Polyatomic ions attract other ions to form ionic bonds.
Polyatomic ions are made up of two or more types of atoms.
Polyatomic ion:
They are also known as a molecular ion, It is an ion composed of two or more covalently bonded atoms.
They have extra or lesser electrons than they need.
They are charged hence they attract opposite one.
For example-
Therefore, C polyatomic ions are made up of more than one atoms.
Answer:
C.
Explanation:
This would be correct because polyatomic ions exist in a group of more than one atom.
How many miles of mgs2o3 are in 199g
Answer:
1.83 moles
Explanation:
1.83 moles
It took Lily 7 seconds to ride her bike 35 m to the end of the block what was her speed
Answer:
5
35 divided by 7 = 5
Explanation:
Hope this helps!!
Liyah
Why is the dihedral angles between the methyl group in Gauche conformation of n-butane slightly larger than 60°?
Answer:
When the dihedral angle = 60° or 300°, (gauche conformation) in butane, the methyl groups are farther apart and therefore the potential energy drops by 4.1 kcal/mol.
I GIVE MORE POINTS WHO ANSWER THIS QUESTION. Which option describes a wavelength of light? (1 point) O a distance between two similar points on a wave of light O a type of visible light O an object that makes light bend or bounce O a heated atom that forms light
Answer:
It's the first option. A distance between two similar points on a wave of light.
Explanation:
On a wavelength chart, where you measure the rate at which the light travels at its distance from the source. You have two points to compare to.
N2+3H2 forms 2NH3
When 3.00 moles of N2 react with excess hydrogen, how many moles of NH3 are formed?
ok ther only one solution n2 is ÷ 2h×2 is ok but the problem is that the standard form of the square is not yet
You went for a hike on the mountaintop near your vicinity. To help you regain your strength following the exhausting work, you decided to hard-boil an egg and eat it. To your surprise, water seem to boil than usual, but after 10 mins in boiling water, the egg is still not cooked, why is that?
This is because increasing altitude lowers the boiling point of water.
What is Boiling point?This is referred to as the temperature in which a liquid starts changing into steam or vapor.
Increasing altitude lowers the boiling point which is the main reason why the egg wasn't cooked when placed in the boiling water. The temperature at which the water boils isn't sufficient enough to cook the egg in this type of scenario.
Read more about Boiling point here https://brainly.com/question/40140
PLEASE ANSWER!!! 50 POINTS TO WHOEVER DOES
Lab Report
Organisms and Populations
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U1_ Lab_OrganismsAndPopulations_Alice_Jones.docx).
Introduction
1. What was the purpose of the experiment?
Type your answer here:
2. What limits the growth of populations?
Type your answer here:
3. Write a hypothesis based on observations and scientific principles.
Type your answer here:
Experimental Methods
1. What tools did you use to collect your data?
Type your answer here:
2. Describe the procedure that you followed to conduct your experiment.
Type your answer here:
Data and Observations
1. Record your observations.
Type your answer here:
Conclusions
1. What conclusions can you draw about how resource availability affects populations of organisms in an ecosystem? Write an evidence-based claim.
Type your answer here:
2. Write a testable question that could be used to further investigate the topic of resources and populations of organisms.
Type your answer here:
Answer:
1. The purpose of an experiment is to test out your hypothesis. If your hypothesis is correct, then it is a theory that could work every single time the experiment has been performed by scientists.
2. Limiting factors include a low food supply and lack of space. Competition for resources like food and space cause the growth rate to stop increasing, so the population levels off. The carrying capacity (K) is the maximum population size that can be supported in a particular area without destroying the habitat.
3. An example of a hypothesis based on observation and scientific principles is:
Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.
A hypothesis is an informed prediction or a tentative statement about what you think that would occur in a scientific experiment as a result of experience from observations accepted by scientific rules and law.
A hypothesis is a testable statement obtained from the research question but questions cannot be tested directly, it is the proposed relationship between the variables that are tested.
An example of a hypothesis is:
Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.
This specifies the direction of the hypothesis because one group is faster than the other.
4. In any ecosystem, organisms and populations with similar requirements for food, water, oxygen or other resources may compete with each other for limited resources, access to which consequently constrains their growth and reproduction. Growth of organisms and population increased are limited by access to resources.
The purpose of an experiment is to test out your hypothesis. If your hypothesis is correct, then it is a theory that could work every single time the experiment has been performed by scientists.Other part of the question is discussed below:
What is limiting factor?Limiting factors include a low food supply and lack of space. Competition for resources like food and space cause the growth rate to stop increasing, so the population levels off. The carrying capacity (K) is the maximum population size that can be supported in a particular area without destroying the habitat.
An example of a hypothesis based on observation and scientific principles is that a Deaf children whose parents are deaf will acquire language faster than deaf children whose parents are not deaf.
A hypothesis is an informed prediction or a tentative statement about what you think that would occur in a scientific experiment as a result of experience from observations accepted by scientific rules and law.
Therefore, The purpose of an experiment is to test out your hypothesis. If your hypothesis is correct, then it is a theory that could work every single time the experiment has been performed by scientists.
Learn more about experiment on:
https://brainly.com/question/30055326
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2H2 + O2 --> 2 H2O
+
How many moles of oxygen is required to produce 13.3 moles of water?
Answer:
Explanation:
Let the number of moles of oxygen = x
2H2 + O2 --> 2 H2O
x 13.3
Since the balance number for oxygen is 1 and the balance number for water is 2, you must set up a proportion. (Those balance numbers represent the number of moles).
1/x = 2 / 13.3 Cross Multiply
2*x = 13.3 Divide both sides by 2
2x/2 = 13.3/2
x = 6.65
You need 6.65 moles of oxygen.
Pls help, needed for chemistry
Answer:
go to a calculator and see the answer then make the hypothisis which is the answer
Explanation:
magic
calculate the number of moles in 200 grams of Sodium hydroxide
Answer:
The answer is 5 mol
Explanation:
Number Of Moles = Mass Of Substance ÷ Mass Of One Mole
Mass of NaOH = Molar Mass of Sodium + Oxygen + Hydrogen
23 + 16 + 1
40 g/mol
Number of Mole = 200/40 = 5 mol
Thus, The number of Moles in 200 grams of Sodium hydroxide is 5 mol
-TheUnknownScientist 72
ONE MINUTE PLSSSS!!! WILL GIVE BRAINLIEST
Carbon has an atomic number of 6 and an atomic mass of 12. If it is a neutral atom then it has 6 protons, ______ neutrons, and _____ electrons.
13 neutrons and 6 electrons
6 neutrons and 6 electrons
7 neutrons and 7 electrons
12 neutrons and 12 electrons
100 POINTS!!!!!!! <3
Answer:
6 neutrons and 6 electrons
Explanation:
I got it right ;) good luck
Which items below are properties of matter? [select all that apply]
solubility
length
taste
hardness
color
mass
density
weight
volume
boiling point
Answer:
Solubility, length, hardness, color, mass, density, weight, volume, boiling, and point.
Explanation: Hope this helps
NaOH(aq) is transferred into a test tube. CaCl2(aq) is added to the tube. What is the formula for the precipitate (if any) that forms
Answer:
2NaOH (aq) + CaCl2 (aq) -> 2NaCl(aq) + Ca(OH)2(s)
Formula of precipitate: Ca(OH)2 (s)
Explanation:
First, we do the double replacement reaction to determine our chemical equation between the reactants and products. Once we have our products, with a solubility chart (I added one below) we can determine which of the products is soluble or insoluble.
In this case NaCl is soluble or aqueous (meaning it can dissolve in water) and Ca(OH)2 is insoluble (meaning that when the reactions takes place, these two will form a solid/precipitate)
scientific notation mean
2.50 grams F2= _____ grams of F2
Answer:
i think maybe 94.99201599999999
Explanation: