Explanation:
what is the question jjsjmwujjduwhfjd
Answer:
Volume is a physical property of an object
One unit of volume is the milliliter
Liquids and solids have constant volumes
Explanation:
does anyone know how to do this ??
Answer:
Look at your periodic table
Explanation:
It tells you everything like Potasium 1 and 1 ox and 1 hydrogen
Differentiate between acids and bases on the basis of their pH values. Give an example of each type.
Bases are the chemical opposite of acids. Acids are defined as compounds that donate a hydrogen ion (H+) to another compound.
Definition of Acids - An acid is any chemical compound which when dissolved in water gives a solution with a hydrogen ion activity greater than in pure water. Bronstead Lowry
Definition of Base - A base is an aqueous substance that can accept hydrogen ions. Bronstead Lowry Definition: A base is any substance which accepts a proton.
Physical Characteristics of Acids - Depending on the temperature, acids can occur in solid, liquid or gaseous form. Taste sour.
Physical Characteristics of Base - Bases feel slippery because of the reaction of the base with the oils of your hand. Frequently solids except ammonia which is a gas. Taste bitter.
Properties of Acids - Electrolytes, conduct electricity (because electrolytes), react with many metals.
Properties of Base - Electrolytes, conduct electricity, ranges from insoluble to so soluble that they can react with water vapor.
Acids are often used to remove rust from metals, as an electrolyte in batteries, for mineral processing, to produce fertilizers and gasoline and as additives in food and beverages. Bases are used primarily in cleaning as dishwashing and laundry detergents, oven cleaners and stain removers.
Here are some differences! Hope this helps, sorry I couldn't think of anything else. ;(
What two things do you need to determine speed
the distance traveled and the time it took to travel that distance
How many quantum numbers are same for 11th and 12th electrons of Magnesium?
Answer: hope this helps if so mark me brainlest
Explanation:
The four quantum numbers determine the state of the electron, and are
n
is the distance of the orbital from the nucleus (
1
,
2
,
3
,
4
etc),
l
is the shape of the orbital (
0
→
n
−
1
)
m
l
is the orientation of the orbital in space (
−
l
→
+
l
), and
m
s
is the spin of the electrons inside the orbital (
−
1
2
or
+
1
2
).
The electronic configuration for magnesium is
1
s
2
2
s
2
2
p
6
3
s
2
. The outermost electron is one in the
3
s
orbital, which means that
n
=
3
.
It also means that
l
=
0
, since
s
is basically shorthand for the orbital shape of
l
=
0
.
m
l
can range from
−
l
to
+
l
, but since
l
=
0
, then
m
l
must also be
0
.
Finally,
m
s
can be either one since there are two electrons in the
3
s
orbital and it doesn't really matter which spin you choose.
Putting all of these together, the final quantum numbers of a magnesium atom are
3
,
0
,
0
,
±
1
2
HELP AGAIN!!!
Which item in Figure 1 expanded the most when heated?
aluminum
steel
glass
oak
which represents the copernican model that is the most similar to that of Aristarchus?
Answer: A
Explanation: A is the answer
What type of change is rotting of fruits?
Answer:
Chemical
Explanation:
The rotting of fruit is a chemical reaction. This is because when fruit spoils, an enzymatic reaction occurs. Because an enzymatic reaction causes molecules to change when rotting, rotting is a chemical reaction.
well,It is a chemical change because once an apple rots, it cannot go back to its original form as a new, clean, and fresh apple. and that is a chemical change. making it be different on a chemical level.
Answer:
chemical change
Explanation:
the reason for a fruit to rot is the enzyme reactions in it we can take that as a solid reason and on the other hand if it is a physical change we can reverse the change that means we should be able to take a rotten fruit and make it to its original position so that we can have it. but we can never do that so we can prove that rotting of fruits is a chemical change.
hope this helps
The morning temperature in a city is 41°F. If a sunny, mild day is forecast, which temperature is most likely for 2:00 p.m.?
Answer:
huh
Explanation:
what would she see if there had been salts dissolved in the colourless , clear liquid?
Answer:
physical change
Explanation:
it has to be 20 charchters long
How many moles are in 5.67x10^24 atoms of RbCl?
Answer:
9.42 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{5.67 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 9.418604...[/tex]
We have the final answer as
9.42 molesHope this helps you
where would earth's be positioned during autumn if you lived in the southern hemisphere
Answer:
Autumn is one of the four basic seasons of the year in the temperate climate zone. It is characterized by moderate air temperatures with a decreasing daily average, and relatively high annual precipitation. The climate autumn is the period of the year in which the average daily air temperature ranges around 10° C.
Astronomical fall begins at the fall equinox and lasts until the winter solstice, which roughly means in the southern hemisphere between March 23 and June 22 (sometimes these dates are a day earlier or a day later, and in a leap year they may be additionally retracted one day). During astronomical autumn, the day time of the day is shorter than the night time, and moreover, with each successive day of the day it decreases and night increases.
Which process takes place in both plant and animal cells
A.Photosynthesis
B.Cellular respiration
C.Formation of glucose
Answer:
cellular respiration
Answer:
the answer is A. cellular respiration
What does it mean if a cell has a positive voltage?
O A The reaction will occur if energy is added.
O B. The reaction will occur naturally
C. The reaction is not spontaneous.
D. The reaction will not occur naturally.
Answer:
B
Explanation:
The reaction will occur naturally
Answer:
B. A pE x
Explanation:
Trust
NEED HELP NOW
Which item does not contain a noble gas?
neon sign
mp3 player
flash camera
helium balloon
Answer:
may be mp3 player......
Answer:
mp3 player
Explanation:
Neon sign contains Neon
Flash camera contains Xenon
Helium balloon contains Helium
which compound is ionic?
1. CaBr2
2. NO2
3. CH4
4. NBr3
What is the measure of how likely an atom is to react with another element
2.
Which of the following is good evidence that an unknown sample is a pure
substance.
A
After leaving a liquid to settle, it separates.
B
After leaving a liquid to settle, it does not separate.
С
After evaporating a liquid, there is nothing left behind.
D
After evaporating a liquid, a white powder is left behind.
Accelerate Learning Inc. - All Rights Reserved
Answer:
С. After evaporating a liquid, there is nothing left behind
Explanation:
In chemistry, a pure substance is that substance that has a definite chemical composition. It cannot be separated using physical means as the chemical bonds that forms it have to be broken. Pure substances include elements and compounds.
According to this question, a good evidence that an unknown sample is a pure substance would be that: After evaporating a liquid, there is nothing left behind. This means that after using physical separation technique, THE PURE SUBSTANCE COULD NOT BE SEPARATED, hence, nothing is left behind.
A student was assigned to take water samples from a lake near his home. He measured the pH of one of the water samples to be 6.0. Which of the following best describes this sample of water?
Highly acidic
Slightly acidic
Highly basic
Slightly basic
Answer: I'm not sure but I'm making a guess cause that's what I put in mines
Explanation: I think just THINK it's "B.- Slightly Acidic"
Make a claim about why scientists might have two ways for thinking about Earth's layers. Summarize evidence to support the claim and explain your reasoning.
Answer:
Direct evidence from rock samples and indirect evidence from seismic waves may account for why scientists have two ways of thinking about earth's layers
Explanation:
Scientists who study about the earth's structure and components called geologists have two main types of evidence to learn about Earth's interior namely
1. direct evidence from rock samples
2. indirect evidence from seismic waves
Direct evidence From Rock Samples
Scientists examine rocks from inside the Earth and these rocks give them clues about Earth’s structure. Some scientists have drilled holes as much as 12 kilometers into Earth and bring up samples of rock. From these samples, they can make inferences about conditions deep inside Earth, where these rocks formed. In addition, forces inside Earth sometimes blast rock to the surface from depths of more than 100 kilometers. These rocks from deep within the Earth provide more information about the interior.
Indirect evidence From Seismic Waves
Since scientist cannot look inside Earth, they have devised an indirect methods of observation by using seismic waves. When earthquakes occur, they produce seismic waves. Scientists record the seismic waves and study how they travel through Earth. The speed of seismic waves and the paths they take reveal the structure of the planet. Using data from seismic waves, scientists have learned that Earth’s interior is made up of several layers with each layer surrounding the layers beneath it.
When heat is lost, molecules
4. Refine Your Plan Suppose you are mixing ingredients for bread, and
the recipe says to bake the dough as soon as it's mixed. But, you have
another task to do and are unable to bake the dough right away. Wha
should you do to make sure your bread still turns out well?
PlEASE ITS TIMED HELP
Answer:
the bread rising shows that it’s baking which is a chemical reaction
Explanation:
If a 2kg bird is pushed by the wind with a force of 2N, how fast does the
bird accelerate?
O 1m
O 2 m/s2
O 4m/s2
O 1 m/s2
The bird will accelerate with an acceleration of 1 m/s². Therefore, option (4) is correct.
What is acceleration?Acceleration of a body can be explained as the change of velocity of a body with respect to time. The acceleration of a body is a vector parameter with both magnitude and direction. Acceleration can be defined as the 2nd derivative of position with respect to time.
According to Newton's 2nd law of motion, force is the product of the mass and acceleration of an object.
F = ma
And, a = F/m
Therefore, the acceleration and mass of a body have an inverse relationship.
Given, the force acting on the bird, F = 2 N
Given the mass of the bird, m = 2Kg
The acceleration in the speed of the bird can be calculated as:
a = F/m
a = 2N/2 Kg
a = 1 m/s²
Therefore, the bird accelerates at 1 m/s² because of the wind.
Learn more about acceleration, here:
brainly.com/question/3046924
#SPJ2
What type of atom has 1 proton, 1 electron, and 1 neutron?
Answer:
Hydrogen atoms
All rocks began as what type of rock?
planetary
igneous
metamorphic
sedimentary
Answer:
Igneous
Explanation:
A container with an initial volume of 1.0L is occupied by a gas at a pressure of 150kPa at 25'C. By changing the volume, the pressure of the gas increases to 600kPa as the temperature is raised to 100'C. What is the new volume? Use Combined Gas Law
Answer:
Final Volume = 0.31L
Explanation:
Initial volume V1 = 1L
Initial pressure P1 = 150kPa
Initial temperature, T1 = 25'C + 273 = 298K
Final Pressure P2 = 600kPa
Final Temperature T2 = 100'C + 273 = 373K
Final Volume V2 = ?
The combined gas law is given as;
P1V1 / T1 = V2P2 / T2
150 * 1 / 298 = V2 * 600 / 373
V2 = 55950 / 178800 = 0.31L
can anyone help me with my homework lol im really behind and need answers! i need help/answers with these subjects - math 2 - chemistry - spanish 2 - world history - complit 2 (english). It's fine if you can Answer only 1 subject!! i just need to catch up
Answer:
where is the question please send question I will give don't worry
How is this person able to stay on the skateboard? explain
Gravity, friction, and balance keeps people able to not fall off a skateboard.
NO ONE ANSWERS MY QUESTIONS
answered
Continue off my answer
Choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. Carbon Monoxide (co) is a mix of carbon and oxygen and when they mix they make carbon monoxide.
Answer:
where is the answer options because it sounds like I need some
Answer:
Sodium Hydride=NaH which has 1 sodium atom, and 1 hydrogen atom, i know this because there are no added numbers meaning theres one of each element.
Explanation:
GUYS I REALLY NEED THIS ASAP!!!!!
Answer:
I don't think so
Explanation:
The equation doesn't look balanced
how many gram of sulphutic acid is present in 0.25 moles of sulphuric acid
Answer:
Mass = 24.52 g
Explanation:
Given data:
Mass of sulfuric acid = ?
Number of moles of sulfuric acid = 0.25 mol
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of sulfuric acid is 98.07 g/mol
Now we will put the values in given formula.
0.25 mol = mass/ 98.07 g/mol
Mass = 24.52 g
