Answer:
3rd choice
Explanation:
Answer:
they both have kinetic energy
Explanation:
because they are both in motion
Hello there
i am looking for some quick help on this question thank you.
Liquid B has a mass of 75 g and a volume of 25 ml. What is liquid B's density?
1: .33 g/ml
2: 3 g/ml
3: 75 g
4: 25 ml
Answer:
To measure the density of a liquid you do the same thing you would for a solid. Mass the fluid, find its volume, and divide mass by volume. To mass the fluid, weigh it in a container, pour it out, weigh the empty container, and subtract the mass of the empty container from the full container.
Explanation:
Answer:
[tex] \rho = \frac{mass}{vol} \\ = \frac{75 \: g}{25 \: ml} = 3g .{ml}^{ - 1} [/tex]
What does the arrow in chemical equations mean? (PLEASE HELP)
A- Cancels
B- Subtracts
C- Prevents
D- Yields
Answer:
yields
Explanation:
I just did that quiz on k12 8th grade
Answer:
D
Explanation:
TOOK TEST ON K12
is mixing acid and base a chemical change or a physical change
Answer : chemical reaction
Mixing an acid with a base is a common chemical reaction.
Answer:
It is a chemical reaction.
Explanation:
Mixing acid and base is a common chemical reaction.
(I had my answer in the comments bc at the time I couldn't submit it as a answer so here ya go)
Hope this helps! :)
How to create a good statement of the problem?
Which statement is true about a neutral solution?
Its pH is less than 7.
Its pH is greater than 7.
It has the same concentration of hydronium and hydroxide ions.
It has a greater concentration of hydroxide ions than hydronium ions.
Answer:
C. It has the same concentration of hydronium and hydroxide ions.
Explanation:
A neutral solution means that it's a balanced substance that is neither a base nor an acid. For example, pure water is a neutral substance.
(I also did the test for this and I got it correct.)
Hope this helps any future people doing this! :)
Answer:same concentration of hydronium and hydroxide ions (C)
Explanation:
Tom tells Greta that his father, an astronomer, is planning a scientific experiment to study another galaxy. Using a powerful telescope, Tom's father will record data of shifts in light patterns and track their different sources every 30 seconds. He will later study the data. Greta says that this is not an experiment. Which of these reasons supports Greta's statement?
It is not performed in a lab.
There are too many variables.
It does not have a control group.
It uses only theoretical predictions.
Answer:
it does not have a control group
6. Which of the following statements is/are TRUE of metals and non-metals?
l. Non-metals are heat conductors.
ll.Aluminum, copper and iron are non-metals.
III. Phosphorus and sulfur are poor conductors of heat and electricity
IV. Metals have luster.
A. I only
B. III only
C. III and IV
D. I and II
Answer:
I= true
III=false
iv=true
Explain the following: Unless the loss of reactant is extreme, only the loss of limiting reactant mass truly introduces error into your theoretical yield calculation.
A student wants to know why sandhill crane‘s fly south for the winter. The student uses a map of North America to make a model of the paths sandhill cranes take as they migrate. The student draws lines with arrows to show the routes sandhill cranes are known to take. Which two issues describe limitations of the students models?
Two limitations of the student's models are that the models do not explain why the phenomenon occurs and the models only record the phenomenon in a limited way
Understanding a specific phenomenon requires gathering and analyzing data thoroughly because the researcher needs to collect data that is directly related to the phenomenon and this data needs to be complete and accurate to have reliable conclusions.
In this situation, the student created some models of the routes of the sandhill crane's migration. This data has two main limitations:
It does not answer the question "why?": If the student wants to understand why these birds go to the South, the models are not very useful because they show "how" these birds migrate but not the reason for this migration.It records the migration only in a limited way: For the models to be complete the student needs to record the migration pattern for two years or more, as the pattern might changeBased on this, two limitations of the models are that they do not explain the phenomenon and the data is not complete.
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Which element has the highest electronegativity and why?
Answer:
See below
Explanation:
Hello there!
Electronegativity is the atom's tendency to attract electrons in a chemical bond
There are two trends to electronegativity:
Electronegativity increases from bottom to top in a group (Li has a greater electronegativity than Fr, for example) Electronegativity increases from left to right across a period (the further right the group, the greater the electronegativity)Looking at a period table, Sb, Sn, Te, and I are all in the same period, so we'll need to decide which element has the highest electronegativity based on the group.
Sn belongs to group 4A (group 14) Sb belongs to group 5A (group 15)Te belongs to group 6A (group 16) I belongs to group 7A (group 17)As I belongs to group 7A, the group that is the farthest right based off of the options given, I has the highest electronegativity
Hope this helps!
List two differences between a map and a giobe
Answer:
1. A map is two dimensional, while a globe is three dimensional
2. A globe is a scaled down representation of the entire Planet Earth. A map can represent an area of any size.
Explanation:
1. A map is usually a sheet of rectangular paper that is a flattened image of an area as seen from the top. A globe on the other hand is a sphere which is a 3D shape.
2. Earth is in the shape of a sphere, so Globes are a smaller representation of the planet. A map can be for a city, state, country, or the world.
If the reaction occurs between Fe2S3(s) and H(aq) and the equation is properly balanced with the
smallest whole-number coefficients, what is the sum of the coefficients for all reactants and products?
Fe2S3(s) + H+ (aq)
Please answer this mathematically.
In the reaction between Fe₂S₃(s) and HBr(aq), the sum of the coefficients for all reactants and products is 12.
If the reaction occurs between Fe₂S₃(s) and HBr(aq) and the equation is properly balanced with the smallest whole-number coefficients, what is the sum of the coefficients for all reactants and products?
Let's consider the unbalanced equation for the reaction between Fe₂S₃(s) and HBr(aq). This is a double displacement reaction.
Fe₂S₃(s) + HBr(aq) ⇒ FeBr₃(aq) + H₂S(g)
We will balance it using the trial and error method.
First, we will balance Fe atoms by multiplying FeBr₃ by 2.
Fe₂S₃(s) + HBr(aq) ⇒ 2 FeBr₃(aq) + H₂S(g)
Then, we will balance S atoms by multiplying H₂S by 3.
Fe₂S₃(s) + HBr(aq) ⇒ 2 FeBr₃(aq) + 3 H₂S(g)
Finally, we will get the balanced equation by multiplying HBr by 6.
Fe₂S₃(s) + 6 HBr(aq) ⇒ 2 FeBr₃(aq) + 3 H₂S(g)
The sum of the coefficients for all reactants and products is:
[tex]1 + 6 + 2 +3 = 12[/tex]
In the reaction between Fe₂S₃(s) and HBr(aq), the sum of the coefficients for all reactants and products is 12.
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Help again thank you lots of points for you keep helping I will give you a good review thanks!
Answer:
it would prob be planet y
How many ethnic groups are there in China?
Answer:
There are a total of 56 ethnic groups in China, with 56 ethnic groups and 56 family members.
Explanation:
There are a total of 56 ethnic groups in China, with 56 ethnic groups and 56 family members.
The scientific community dismissed John Needham’s attempt to prove spontaneous generation. What was the reason that they gave? *
A. By sealing off the flask he deprived the environment of air, a requirement of spontaneous generation
B. He used the wrong type of flask
C. He left the flasks open to the air for too long
D. He did not boil his broth long enough and the flasks were not cleaned prior to the experimenter.
Answer:
He did not boil his broth long enough and the flasks were not cleaned prior to the experimenter
Let us assume that Cr(OH)3 (s) is completely insoluble, which signifies that the precipitation reaction with NaOH(aq) (presented in the transition) would go to completion Cr3+ (aq) + 3NaOH(aq) + Cu(OH)3 (s) + 3Na+ (aq) If you had a 0.150 L solution containing 0.0280 M of Cr3' (aq), and you wished to add enough 1.31 M NaOH(aq) to precipitate all of the metal, what is the minimum amount of the NaOH(aq) solution you would need to add? Assume that the NaOH(aq) solution is the only source of OH(aq) for the precipitation Express the volume to three significant figures and include the appropriate units.
Answer:
Formation of an insoluble compound will sometimes occur when a solution containing a particular cation (a positively charged ion) is mixed with another solution containing a particular anion (a negatively charged ion). The solid that separates is called a precipitate.
Explanation:
If an ionic compound has a 2- charge how does that affect the total number of electrons in a Lewis structure
In the situation where an ion has a charge of -2, the Lewis structure is affected because it must add two additional electrons.
The Lewis structure is a term to refer to the graphical representation that shows the pairs of electrons in dashes or points of bonds between:
The atoms of a moleculeThe lone electron pairs that may existAdditionally, the charge of an ionic compound is calculated using the difference in electrical charge between the electrons. On the other hand, an ion is formed by adding or removing electrons, so the magnitude of the resulting charge depends on the number of electrons added or removed.
According to the above, if an ionic compound has a -2 charge, the Lewis structure must add two electrons.
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Draw a Lewis structure for the following molecules on scratch paper. Then give the number of bonds between the C and N in each.
CH5N
CH3N
HCN
Refer to the attachments
What is the process whereby stars create elements heavier than hydrogen?
atomic growing
atom splitting
nucleosynthesis
hydrogenation
Answer:
nucleosynthesis
Explanation:
The correct answer is nucleosynthesis.
How do stars create heavier elements?After the hydrogen in the star's core is exhausted, the star can fuse helium to form progressively heavier elements, carbon and oxygen, and so on, until iron and nickel are formed. Up to this point, the fusion process releases energy. The formation of elements heavier than iron and nickel requires an input of energy.
What was the process of the formation of heavy elements?In a supernova explosion, neutron capture reactions take place (this is not fusion), leading to the formation of heavy elements. This is the reason why it is said that most of the stuff that we see around us comes from stars and supernovae (the heavy elements part).
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What is the electron configuration for Cs^1+ ?
Answer:
electron configuration Cesium Electronic Configuration [Xe] 6s1
Explanation:
Using what you know about models, write an explanation from the following prompt
HOPE IT HELPS YOU
CAN YOU BRAINLEST ME
What is the specific heat of a diamond if 4.5 J of heat is required to heat a 0.72 g piece of diamond
from 10°C to 22.3°C?
Answer:
0.51 J/g°C
Explanation:
is mercury homogeneous or heterogeneous?
Answer:
homogenous
Explanation:
its a pure element, so it is a pure substance
The relationships among which variable quantities are expressed by the ideal gas law equation?
A. pressure, volume, temperature, number of moles
B. volume, temperature, number of moles, gas constant
C. pressure, volume, number of moles, mass
D. pressure, volume, temperature, molar mass
Answer:
A. Pressure, volume, temperature, number of moles
The relationships among pressure, volume, temperature, and the number of moles are expressed by the ideal gas law equation. Therefore, option A is the correct answer.
The ideal gas law equation is PV = nRT, where P represents the pressure of the gas, V represents its volume, n represents the number of moles of gas present, T represents its temperature, and R is the ideal gas constant. This equation describes the behavior of an ideal gas at standard temperature and pressure (STP).
By manipulating the ideal gas law equation, we can calculate various properties of gases, including their density, molar mass, and molecular weight. This equation is widely used in chemical engineering, thermodynamics, and other fields that deal with gases.
Thus, option A is correct.
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What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?
Answer:
Answer should 133
Explanation:
all you have to do is add the protons and neutrons
The mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.
What is an Atomic mass of an atom?The Atomic mass of any atom may be defined as the mass of an atom that is togetherly constituted by protons and neurons in the nucleus of an atom. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number).
The mass number of Xenon is calculated by the following formula:
The Number of neutrons = Mass number - Atomic number.
where, number of neutrons = 75, and number of protons = 54.
75 = Mass number - 54 (number of protons = atomic number).
Mass number = 75 + 54 = 129 amu.
Therefore, the mass number for an atom of xenon containing 54 protons and 75 neutrons is 129 amu.
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how many molecules of oxygen are needed to make 3.5 oxygens of water?
Answer:
57.6g
Explanation:
So, if in one mole of water, 16 g of oxygen atom is present. Then, in 3.6 moles of water, the mass of oxygen present will be 3.6×16=57.6g. Therefore, the amount of oxygen present in 3.6 g water is option (B)- 57.6 g.
if there is 5 atoms of oxygen in the reactant, how many oxygen atoms must be in the product
Answer:
5
Explanation:
It requires 20 chracters to fill this answer
Nadine was cooking a pot of potatoes on the stove. When the potatoes were don’t she needed to remove the potatoes for the water. Which separation technique would be most efficient and effective method for Nadine to use to achieve this
Answer:
boiling
Explanation:
Which types of energy can be TRANSFERRED? Select ALL that apply.
-thermal
-electromagnetic
-mechanical
-electrical
1 someone help me please
Answer:
J
Explanation:
Because the vapor can be turned back to water and the vapor is still considered water.
