Answer:
you can't go through a solid unless you broke the atoms in the wall
Which of the following is the best reason to read directions carefully before beginning any type of lab?
A. so that you can perform the experiment quickly
B. so that you can ask questions about steps you do not understand
C. so that you can answer all questions at the end of the lab
D. so that you can decide when is the best time of day to complete the lab
Answer:
B
Explanation:i think
Use the ruler determine the length of the blue object
Record vor answer to the neareste
The objects
Centimeters long
Answer: 2.7 centimeters long.
Explanation: count from starting at the beginning of the number on the ruler "2" and counted up until the end of the blue object. Counted 7 lines, so, 2.7 is the correct answer.
Answer:
2.7
Explanation:
Help ASAP
What is one way to tell that a solid has formed a solution with water?
O A. The liquid changes color as the solid disappears.
о
B. Some of the solid remains at the bottom of the container.
O C. Gas bubbles are produced as the solid disappears.
O D. The solid can be recovered by evaporating the water.
Answer:
B
Explanation:
I'm pretty sure it's B. Good luck
Some of the solid remains at the bottom of the container is one way to tell that a solid has formed a solution with water. Therefore, option B is correct.
What do you mean by solution ?A solution is a uniform mixture of one or more dissolved solutes in a solvent. A solvent is a substance that dissolves a solute to produce a homogeneous mixture. The substance that dissolves in a solvent to form a homogeneous mixture is referred to as a solute.
Solution that is saturated. A solution containing a solute that dissolves until it is no longer able to dissolve, leaving the undissolved substances at the bottom.
If more solute is added, and it still does not dissolve, the original solution has become saturated. If the solute added dissolves, the original solution was unsaturated.
Thus, Some of the solid remains at the bottom of the container is one way to tell that a solid has formed a solution with water, option B is correct.
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you have an object with a mass of 86g and a volume of 10cm cubed. what is the density
Explanation:
density = mass/ volume
density = 86/ 10
density = 8.6 g/ cm³
Write the difference between compound and mixtures ?
Answer:
The mixture contains two or more substances mixed, but neither chemically as well as not in inexact quantity while compound includes two or more elements combined chemically and in a fixed ratio. Pure substances are made up of elements and compounds
Hope this helps!
which of the following substance is usted up during photosynthesis
During the process of Photosynthesis, light/ radiant energy is transformed in to chemical energy.
solar
energy
Photosynthesis
6C0, + 6H20
C.H,206 + 602
glucose oxygen
water
carbon
dioxide
True
O False
Where are chemicals found?
A. In solids, liquids, and gases
B. Only in the air
C. Only in powders
D. Only in liquids
Apply the law of conservation of matter
Answer:
in science a lot as a general statement that explains a large number of observations before being accepted a llama be verified many times under many conditions law are therefore considered the highest form of scientific knowledge and are generally thought to be inviolable scientific laws for form the core of scientific knowledge 1 scientific law that provides the foundation for understanding in chemistry is the law of conservation of matter states that in any given system that is closed the transfer of matter in an out the amount of matter in the system stays constant the concise way of expressing this law is to say that the amount of matter in a system is conserved
The process where a substance reacts with oxygen
Answer:
The process where substance react with oxygen is called combustion.
Explanation:
When substance react with oxygen combustion is occur. The substance which burned is called fuel and in this process large amount of heat is released to the surrounding. It is exothermic process.
For example:
4Li + O₂ → 2Li₂O
2Mg + O₂ → 2MgO
S + O₂ → SO₂
The product which is formed as a result of combustion reaction are called oxides.
In given examples we can see that lithium, magnesium and sulfur react with oxygen and product formed is oxides of respective elements such as lithium oxide ( Li₂O), magnesium oxide (MgO) and sulfur oxide ( SO₂ ).
plss help ! chemistry
Answer:
1. place some sulfuric acid in a beaker and warm it in a water bath.
2. add a spatula of copper(II) oxide powder to the acid and stir with a glass rod.
3. continue adding copper(II) oxide powder until it is in excess.
4. filter the mixture to remove the excess copper(II) oxide.
Explanation:
Which element does the electron configuration 1s22s22p2 represent?
B
C
N
K
Answer:
Explanation:
carbon cause that has 6 electrons .
Answer:
it is carbon
Explanation:
1s2 2s2 2p2 add all the 2 and you get 6 so it is carbon
What is the formula for weight ?
Answer:
W=F=mg or W=mg
Explanation:
Bose-Einstein condensates _____.
were predicted in the 1920s
have atoms that have lost their unique properties
occur when atoms stop moving
all of the above
Answer:
All the above
Explanation:
Just did a quiz (:
uestion 1
This scientist thought that all matter was composed of small, indivisible atoms.
-
Thomson
Bohr
Rutherford
Dalton
Schrodinger
Be
Name the element.
Number of shells?
Valence electrons?
Answer:
Name the element: Beryllium
Number of shells: 4
Valence electrons: 2
Explanation:
In 1770, ___________ published the first map of the Gulf Steam.
Group of answer choices
Ben Franklin
Nevil Maskelyne
J. F. W. DeBarres
Answer: Ben Franklin
Explanation: Hope this helps! :)
Answer:
Ben Franklin
Explanation:
Remember black lives matter and vote Joe Biden
PLS PLS PLS HELPPP How is clay deposited to form shale?
A. Water deposits clay in thin, flat layers.
B. Water deposits clay in thick, flat layers.
C. Water deposits clay in thin, uneven layers.
D. Water deposits clay in thick, uneven layers.
An atom has a mass number of 9 and 5 neutrons What is its atomic number?
A. 14
B. 11
C. 19
D. 4
Answer:
D. 4
Explanation:
mass number - number of neutrons = number of protons
Use the periodic table to identify the number of core electrons and the number of valence electrons in
each case below. Argon (Ar): [NE] 3s^23p^6
Answer:
10 core electrons and 8 balance electrons
Explanation:
Give two examples of leaves that we eat
Which best describes why NH4+ can form an ionic bond with Cl-?
O Its outermost shell gains one or more electrons from Cl-.
Its positive charge is attracted to the negative charge of Cl-.
o It has a negative charge that is spread over the entire ion.
o It has a nitrogen atom that is strongly attracted to Cl-.
Answer:
B)
Explanation:
Its positive charge is attracted to the negative charge of Cl–.
(Brainliest bruh Cmon)
Ammonium ion is cation which forms ionic bond with an electronegative element such as chlorine. Thus its positive charge is attracted to the negative charge of Cl-.
What is ionic bond?Ionic bonds are formed between an electropositive atom or group with an electronegative atom or group. One or more electrons are lost from the electropositive group to the electronegative group.
Electropositive groups are electron rich and are capable of forming positive ions by losing electrons. These positive ions are called cations. Whereas, electron accepting group forms negative ions called anions.
In the case of ammonium ion the NH₄⁺ is in protonated form and Cl- is in deprotonated form, thus in fact there occurs an acid-base reaction between them where NH₄⁺ donates its H to Cl- forming HCl.
The electronegative pull of chlorine atom abstract the positively charged hydrogen and thus, option B is correct.
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What is the order from largest to smallest: galaxy, universe, star, asteroids, planets, moons, solar system?
Answer:
Universe, galaxy, solar system, star, planet, moon and asteroid.
Explanation:
You're welcome!
Answer:
Universe, galaxy, solar system, star, planet, moon and asteroid
Explanation:
Question 5 of 25
Which two phrases best describe vascular tissue in plants?
A. Contain root hair cells and guard cells
B. Cover the outside of plants
c. Contain cells that connect to form pipes
D. Transport water and food
SUBMIT
Rick designs an experiment to see how sunlight affects plant growth. He places identical plants in front of three windows. Window A has the shades all the way up. Window B has the shades halfway down. Window C has the shades all the way down. He waters them all with the same amount each day. After a week, he measures their growth.
What is the independent variable in his experiment?
Answer:
the shade/light is the independent variable
Explanation:
Answer:
the independent variable is the light and or shade.
Explanation:
because the light and the shade are going to both effect the growth.
and ive done this before haha well hope this helped
What is the name of the process that determines what was difficult or easy to separate oxygen from iron ores
Answer:
Iron is extracted from iron ore in a large container called a blast furnace. Iron(III) oxide is reduced to molten iron when it reacts with carbon.
Explanation:
I am Muslim please make as brainiest
hope it helps you
❤ ❤ ❤ ❤ ❤
Sucrose: density = 1.59 g/cm³. Your experiment showed a density of 1.68 g/cm³. What is the percent error *
Answer:
The answer is
5.66 %Explanation:
The percentage error of the density can be found by using the formula
[tex]Percentage \: \: error(\%) = \frac{error}{actual \: \: number} \times 100 \\ [/tex]
From the question
actual density = 1.59 g/cm³
error = 1.68 - 1.59 = 0.09
The percentage error is
[tex]P(\%) = \frac{0.09}{1.59} \times 100\% \\ = 5.66037735...[/tex]
We have the final answer as
5.66 %Hope this helps you
Solve a +b+c, When a = 25.164, b= 74.1, c= 46.98
using proper number of significant figures.
Answer:
146.244
Explanation:
25.164
+ 74.100
+ 46.980
= 146.244
which of these has the highest frequency?
ultraviolet light
radio waves
xrays
microwaves
What is the electron configuration of an element with an atomic
number of 10?
Explanation:
From the periodic table the element with atomic number 10 is neon and this element is a noble gas.
It's electron configuration is
[tex]1 {s}^{2} \: \: \: \: \: 2 {s}^{2} \: \: \: \: \: 2 {p}^{6} [/tex]Hope this helps you
