Answer: 130g , 40g , 70g
Explanation:
What tool do you use to measure a rectangle?
A. Common balance
B. Ruler
C. Graduated cylinder
Answer:
Ruler
Explanation:
How can you determine an atom's atomic mass?
Answer: I think you're supposed to add the protons and neutrons and then that's your answer. Sorry if I'm wrong :/
Explanation:
I'll give brianliest if correct .
if the heat of combustion of hydrogen is -285.8KJ,what is the heat of formation of water
Answer:
The heat of formation of H2O(g) is likely to be-242,8KJ.
Explanation:
The heat of formation of H2O(g) will be slightly lower than the heat of formation of H2O(1)as some energy is released during condensation of water vapour to liquid water.
Argon gas is heated from 28 °C to 350K. After being heated the volume was 1.2 L. What was the original volume?
Explanation:
thinking it Charles
V1=1.03or 1L
During a lab activity, students were given samples of four different unknown elements. The students record their observations as shown in the table.
Sample 1 Sample 2 Sample 3 Sample 4
shiny shiny reddish-brown colorless
high electrical
conductivity
low electrical
conductivity
low electrical
conductivity
low electrical
conductivity
solid at room temp. solid at room temp liquid at room temp. gas at room temp.
flattens when hit
with a hammer
breaks into pieces when hit with a hammer
splashes when hit
with a hammer
no effect when hit
with a hammer
boiling point:
882.9 °C
boiling point:
3265 °C
boiling point:
58.8 °C
boiling point:
-268.9 °C
Which of the following BEST identifies which element(s) in the table are metallic?
A.
Sample 1, because it is shiny and a good conductor of electricity
B.
Samples 1 and 2, because both samples are shiny and solid at room temperature
C.
Sample 2, because it is shiny and solid at room temperature
D.
Sample 3, because it is the only sample that is a liquid at room temperature
Answer: D
Explanation: Metals are solid at room temp and also are shiny and can be flattened or broken into pieces when hammered and some metals are high and low conductors of electricity.
Metals have a characteristic property of conduction and malleability and thus sample 1 is metallic.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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how to get over a guy u have liked for a year and 4 months
Answer:
Try to find someone who is interested in you as well as you are with him. But be chill about it and never ever let yourself think your not perfect enough cause you are thee most phenomenal person in the entire planet and there is no one like you, you are special. P.S. there are alot of cute guys out there you just gotta wait until he finds you or you find him.
Explanation:
Answer:
huh
Explanation:
A balloon takes up 625 L at 0°C. If it is heated to 80°C, what will its new volume be?
Answer:
853.15 L
I hope This is Right!
Apologies if it's not :(
Two students are having a tug of war. The flag on the rope begins at point Y. team A pulls to the left with force of 120 N. Team B pulls to the right with force of 160 N. Based on these forces, which letter shows the likely movement of the flag?
Choices:
A: W
B: X
C: Y
D: Z
(Please help!!) 20 points
Answer:
the answer is Z b/c wehave to forces and they have different direction. then search the sum of the forces. thus we gain 40 N to right.
Knowing that a meteorologist is a scientist whose job requires special training, Leandra interviewed a local meteorologist for a science assignment. She wanted to find out what the important job duties of a meteorologist are. Choose the two that apply.
A. collect and analyze data to make predictions about the weather
B. guess what the weather will be and report it on television
C. carry out investigations of insects and how they affect the environment
D. use observations and technology to determine how global patterns affect weather
She was curious about the important job duties of a meteorologist, which include collecting and analysing data to make weather predictions and comparing weather data from various local, regional, and global sources.
What is the most important role a meteorologist has?Meteorologists perform both observation and investigation. They study maps, satellite data, and radar data to learn about the physical conditions of the atmosphere above them.In addition, they compare weather data from local, regional, and global sources.Many people believe that the person who gives the weather forecast on television is a meteorologist.However, television meteorologists make up a small percentage of all meteorologists.Meteorologists conduct research, teach, consult, and forecast. Meteorologists collect and analyse weather data in offices and research facilities. A weatherman, on the other hand, broadcasts live weather conditions, alerts, and forecasts.To learn more about Meteorologist, refer to:
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Suppose a particle has 4 protons, 5 neutrons, and 2 electrons. What is its
charge?
Answer:
It's going to be a postive charge because although theres a lot more neutrons then the rest of them, neutrons are neutral, which won't have much of an effect to the charge of the atom. 4 protons has a larger proportion to the rest.
the force attraction between the particles are ______in solid _____in liquid and______ in gas
Explanation:
greatest , greater and last
hope it helps
Which word should replace the question mark in the diagram?
A) Refraction
B) Reflection
C) Light energy
D) Rainbow
Answer:
Could you provide a diagram?
Explanation:
Question 40 (1 point)
Is boron a metal, metalloid, or nonmetal?
Boron is a non metallic element and the only non-metal of the group 13 of the periodic table the elements.
Hope this helps, have a great day!
I’m 13 if I did 100 reps of 5 types of push-ups will it build muscle in arms and chest
3. Sexual reproduction is the process of creating a new organism by combining the
genetic information and material from parent organisms. Which of the following is
responsible for storing the genetic instructions needed to specify traits?
PLEASE HELPP
Answer:
chromosomes is responsible
The reproduction is defined as a process which involves the production of offspring. The genetic instructions are stored in chromosome. The correct option is C.
What is chromosome?A chromosome is defined as the DNA molecule which consists of all the genetic material of an organism. It is found to be present in the nucleus of each cell. The DNA inside the chromosome is tightly coiled around special proteins called histones.
All living organisms are composed of chromosomes. Humans have 23 pairs of chromosomes. 22 pairs of these chromosomes are called autosomes. These are same in both males and females. The 23rd pair of chromosomes are called allosomes and they differ between sexes.
The males have one 'X' and 'Y' chromosome, while females have two copies of the 'X' chromosome. The important function of genetic material is to store information needed by the cell to make proteins.
Thus the correct option is C.
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How would you know that an organization is a cooperative?
Answer: A cooperative is a private business organization that is owned and controlled by the people who use its products, supplies or services. Although cooperatives vary in type and membership size, all were formed to meet the specific objectives of members, and are structured to adapt to member's changing needs. hope this helps. Can u give me brainliest
Explanation:
Attraction between particles is less.
Answer:
I know the answer
Explanation:
attraction helps its capacity
hope it may helps you
0.0665 mol of sodium hydroxide (NaOH) is used to completely titrate and neutralize 0.050 L of hydrochloric acid solution (HCl). What is the molarity of the acid?
A. 1.33 M
B. 0.00131 M
C. 2.62 M
D. 0.00262 M
Water contains dissolved oxygen that fish can breathe. Which factor would not increase the amount of oxygen in the water of a fish aquarium?
Answer:Place the water under brighter .
Explanation:
Equimolar amounts of Cl2(g) and CO(g) are injected into an evacuated, rigid container, where they react according to the equation below. Cl2(g)+CO(g)⇄COCl2(g) ΔHrxn=−109kJ/molrxn (a) If 7.0 g of CO(g) is consumed in the reaction with excess Cl2(g), how many moles of COCl2(g) are produced? (b) Which element is oxidized in this reaction? Justify your answer in terms of oxidation numbers.
Answer:
0.25 moles of COCl₂ are been produced
The element that is oxidized is C, it changed the oxidation state from +2 in CO to +4 in phosgene.
Explanation:
Equilibrium reaction:
Cl₂(g) + CO(g) ⇄ COCl₂(g)
Let's convert the mass of CO to moles:
7g . 1mol /28g = 0.25 moles
As ratio is 1:1, we can say that 0.25 moles of COCl₂ are been produced.
1 mol of chlorine reacts to 1 mol of carbon monoxide in order to produce 1 mol of phosgene.
Chlorine is been reduced:
Cl₂ + 2e⁻ ⇄ 2Cl⁻
Change the oxidation state, from 0 (ground state) to -1. Oxidation state decreased.
Carbon is been oxidized.
In CO, carbon has +2 as oxidation state. In phosgene the oxidation state is +4. This oxidation state was increased, that's why it has oxidized.
The element that is oxidized is carbon whose oxidation number was increased from +2 to +4.
The equation of the reaction is;
Cl2(g) + CO(g) ⇄ COCl2(g)
We have been told that the chlorine gas is the reactant in excess hence the carbon monoxide is the limiting reactant.
Number of moles of CO = 7.0 g/28 g/mol = 0.25 moles
Since the reaction is 1:1, 0.25 moles of COCl2 is produced.
The element that is oxidized is carbon whose oxidation number was increased from +2 to +4.
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could someone help me!
Consider a cup made of plastic. What are the pros of using plastic?
Answer:
It's cheap to make, and its recyclable
C3H5N3O9(s) --> N2(g) + CO2(g) + H2O(g) + O2(g) Solid nitroglycerine explodes when heated, producing several different gases (according to the reaction above). If a government scientist explodes 777 g of nitroglycerine, How many grams of each gas should be produced? How many molecules of each gas will be produced?
Answer:
- 143.6 g of N₂ ; 3.08×10²⁴ molecules of N₂
- 451.4 g of CO₂ ; 6.17×10²⁴ molecules of CO₂
- 153.9 g of H₂O ; 5.14×10²⁴ molecules of H₂O
- 27.3 g of O₂ ; 5.14×10²³ molecules of O₂
Explanation:
This is a reaction of decomposition:
4C₃H₅N₃O₉(s) → 6N₂(g) + 12CO₂(g) + 10H₂O(g) + O₂(g)
4 moles of solid nitroglycerine decompose to 6 moles of nitrogen, 12 moles of carbon dioxide, 10 moles of water vapor and 1 mol of oxygen
We convert mass to moles → 777 g. 1mol/ 227g = 3.42 moles
4 moles of C₃H₅N₃O₉ can decompose to:
6 moles of N₂ ____ 12 moles of CO₂ ___ 10 moles of H₂O ___ 1 mol of O₂
Then, 3.42 moles of C₃H₅N₃O₉ may decompose to:
(3.42 . 6) / 4 = 5.13 moles of N₂
(3.42 . 12) / 4 = 10.26 moles of CO₂
(3.42 . 10) / 4 = 8.55 moles of water vapor
(3.42 . 1) / 4 = 0.855 moles of oxygen
We convert the moles to mass:
5.13 mol . 28 g/mol = 143.6 g of N₂
10.26 mol . 44 g/mol = 451.4 g of CO₂
8.55 mol . 18 g/mol = 153.9 g of H₂O
0.855 mol . 28 g/mol = 27.3 g of O₂
We count the atoms:
5.13 mol . 6.02×10²³ molecules /mol = 3.08×10²⁴ molecules of N₂
10.26 mol . 6.02×10²³ molecules /mol = 6.17×10²⁴ molecules of CO₂
8.55 mol . 6.02×10²³ molecules /mol = 5.14×10²⁴ molecules of H₂O
0.855 mol . 6.02×10²³ molecules /mol = 5.14×10²³ molecules of O₂
(Please don’t post a link and actually give an answer)
Why does mixing reactants in different molar ratio’s affect the amount of product and the amount of each reactant left over?
Answer:
https://brainly.com/question/22487248?answering=true&answeringSource=feedPublic%2FhomePage%2F3
Explanation:
Match each body system with its main organ.
Lungs
Heart
Brain
Stomach
Bladder
Nervous
Circulatory
Digestive
Excretory
Respiratory
Answer:
it's in the explanation
Explanation:
Lungs- Respiratory
Heart- Circulatory
Brain- Nervous
Stomach- Digestive
Bladder- Excretory
water covers over two thirds of earths surface. Yet water shortages are a major problem for many people around the world. Why do u think this is the case?
please answer!! will give brainliest!!
Explanation:
I think it's from over population and global warming and we can't completely drink sea water
I hope it helps
Use the information and table to answer the following question.
A group of students collects data to determine whether compounds were ionic or covalent. They placed each
compound in a small bowl and stuck two open ends of a battery-powered circuit in the compound.
Compound
CO2 (s)
KCI (s)
CaO (s)
SIO2 (s)
Conductive
No
No
No
No
Based on the student's data, can they determine which substances are ionic, and which are
covalent?
A. No, as lonic compounds are only conductive in an aqueous (water) solution.
B. Yes, as all of these compounds are lonic since they are not conductive.
C. No, as covalent compounds are only conductive in an aqueous (water) solution.
C
D. Yes, as all of these compounds are covalent since they are not conductive.
Answer:
d
Explanation
all are compounds
Yes, as all of these compounds are covalent since they are not conductive. Therefore, the correct option is option D.
What is chemical compound?A chemical compound is a material made of several similar molecules (as well as molecular entities) joined by chemical bonds and comprising atoms from various chemical elements.
Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be shattered or new ones created during this process. Yes, as all of these compounds are covalent since they are not conductive.
Therefore, the correct option is option D.
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Explain in your own words how molar mass and molarity are the same and how they are different?
Answer:
The two masses have the same numerical value, but the units are different
Explanation:
The two masses have the same numerical value, but the units are different: The molecular mass is the mass of 1 molecule while the molar mass is the mass of 6.022 \(×\) 1023 molecules.
Mushrooms are ___________ that use spores for ______________?
How many Available electrons does CIO3, chlorate ion?