Answer:
1. Kindof because we tried our best to stop but we still do bad things.
2. I see myself making not being able because it is survival for me.
3.Yes I think it is hard choices because we need to make sure we don't repeat.
4. My children will say how is the SUV.
5. I would say itds pretty good but too much gas.
6. I think the consumer for adding lots of gas.
why the Titanic sunk due to density.
Answer:
When the titanic hit the iceberg, water rushed into the ships hull and displaced the air. The average density of the water and the steel ship was greater than the density of the water. The result of this caused the titanic to sink to the bottom of the Atlantic.
. When a newspaper is left in direct sunlight for a few days, the paper begins to turn yellow. The yellow
color is evidence of a
a physical property b, chemical property
c. physical change d. chemical change
4. What describes matter based on its ability to change into new matter with different properties?
a. A chemical change
b. A physical property
c. A chemical property
d. A physical changE
Physical Change
It is being changed by the sun
F
1. For each statement, circle Tor F for True or False. In the blanks, write the number(s) of the SENTENCE(S) that
give the best evidence for your answer.
a. Rocks are classified by the minerals that create them.
b. Sedimentary rocks can never change form.
c. Metamorphic rocks form on the surface of Earth.
d. Only Igneous rocks can be turned into Metamorphic rocks.
52
Answer:
1:F,2:F,3:T,4:I don't really know
A mixture of two gases with a total pressure of 2.06 atm contains 0.70 atm of Gas A. What is the partial pressure of Gas B in atm
Answer:
the object with lesser mass
Explanation:
its kinetic energy
What causes electric shock?
A. Watts
B. Amperage
C. Voltage
D. Current
Explain why an atom with an electron configuration of 1s2,2s2,2p6,3s2,3p3 has 3 valence electrons despite having 5 electrons in its third energy level.
Answer:
Silicon
Explanation:
Precautions to be taken when is experimenting the boiling point of liquids
Can you decompose a Single displacement reaction?
What two particles compose the nucleus of an atom? ___________________ and ______________________.
Answer:
protons and neutrons
Explanation:
D
more than 80 s.
2.
A student carried out 2 experiments to investigate the rate at which gas was given
off when indigestion tablets were added to dilute hydrochloric acid.
She used her results to draw curves on a graph.
syringe
Experiment1
volume
of gas
(cm)
Experiment 2
tablet
50 cm acid
Experiment
Time/seconds
Experiment 2 could have been carried out
A
B
at a lower temperature
using more concentrated hydrochloric acid
using half an indigestion tablet
using a crushed tablet.
с
PLEASE HELP!!!! DUE SOON!!
Use the portion of the periodic table shown below to answer the questions.
A portion of the first three columns of the periodic table is shown. Column one from top to bottom reads 11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. Column two reads 12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. Column three reads 21 scandium 44.956 and 39 yttrium 88.906.
Part 1: Name two elements that have the same properties as magnesium (Mg). (4 points)
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences. (6 points)
Answer:
Explanation:
Calcium and Beryllium are similar to Magnesium because all the three elements belong to the same group and have 2 valence electrons in their outer shell.
Potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element.
Which action occurs at an electrode of a galvanic cell?(1 point) plz help
anion flow
anion transfer
electron flow
electron transfer
Answer:
i think ur answer would be this one electron flow
Explanation:
How are heterogeneous mixtures and solutions the same?How are they different?
Hello soysans!
Heterogeneous mixtures and solutions are, well....mixtures.
Solutions are a type of homogeneous mixtures.
Now, what are homogeneous mixtures? Homogeneous mixtures are mixtures that are uniformly spread throughout. They have an even distribution of components. The particles are soluble & too fine to be seen be seen by the naked eye.
On the other hand, heterogeneous mixtures are mixtures that are non-uniformly spread throughout. They have an unequal composition & the particles are big enough to be seen by the naked eye.
Solutions (homogeneous mixtures) & heterogeneous mixtures have a lot of similarities & dissimilarities between them.
Similarities (How are heterogeneous mixtures and solutions the same?) :
Homogeneous mixtures & heterogeneous mixtures are mixtures, i.e, they are made up of 2 or more particles/components mixed together.Dissimilarities (How are they different?) :
Heterogeneous mixtures are non-uniformly scattered while homogeneous mixtures are uniformly scattered.Heterogeneous mixtures have huge particles while particles in homogeneous mixtures are very small.Heterogeneous mixtures can scatter light (tyndall effect) but homogeneous mixtures cannot.___________________
[tex]\mathfrak{Lucazz}[/tex]
There are _____________ elements, but only 92 occur naturally.
drag each tile to the correct location on the concept map
Answer:
I need a picture to help
Explanation:
what compound has a formula of c5h12o and a broad ir peak at 3300 cm–1?
The compound is known as Pentanol.
Pentanol is an example of an Alcohol and has five carbon atoms present in
its structure. The formula for Pentanol is C₅H₁₂O, it has a straight chain and a
distinctive aroma.
Pentanol also has a broad IR peak of 3300cm⁻¹ which is referred to as the
wavelength in which it is absorbed during infrared spectroscopy.
Read more on https://brainly.com/question/25368519
Cho 4g CuO vào dung dịch axit clohidric 10% thì phản ứng vừa đủ.
a/ Viết PThh
b/ tính khối lượng muối sinh ra
c/ tính nồng độ % dung dịch sau phản ứng
Answer:
Explanation:
a. CuO+ 2HCl⇒CuCl2+ H2O
b. [tex]n_{CuO}[/tex]= [tex]\frac{4}{80}[/tex]= 0,05 (mol)
⇒[tex]n_{CuCl2}[/tex]= [tex]n_{CuO}[/tex]=0,05 mol
⇒[tex]m_{CuCl2}[/tex]= 0,05×135=6,75 (g)
c. [tex]n_{HCl}[/tex]=2× [tex]n_{CuO}[/tex]=0,1 (mol)
⇒[tex]m_{HCl}[/tex]= 0,1×36,5= 3,65 (g)
⇒[tex]m_{dd HCl}[/tex]= [tex]\frac{m_{HCl}}{10}[/tex]×100=36,5 (g)
⇒ Nồng độ phần trăm dd sau phản ứng= Nồng độ % dd CuCl2=[tex]\frac{m_{CuCl2} }{m_{dd HCl+ m_{CuO} } }[/tex]×100=[tex]\frac{6,75}{36,5+4}[/tex] ×100≈ 16,67%
HEY CAN ANYONE PLS ANSWER DIS IN UR OWN WORDS!!!!!
Answer:
1. They debated about many things.
2. Greek philosophers debated about things. They did not have a scientific/experiment based approach to studying nature. They did not have tools.
3. Democritus
4. Democritus had the basic idea of atoms, even though he had no experimental evidence to support his thinking.
5. taught that there were substances called atoms and that these atoms made up all material things. The atoms were unchangeable, indestructible, and always existed.
Explanation:
hope this helps
Why do atoms want 8 valence electrons?
1) 8 valence electrons are a full shell that makes the atom more stable.
2) 8 valence electrons help atoms dissolve in water.
3) In nature, 8 is the number at which all matter is most happy.
4) 8 valence electrons make the atom better able to react with other elements.
Answer:
1) 8 valence electrons are a full shell that makes the atom more stable.
Explanation:
Due to the octet rule, atoms tend to form compounds in ways that give them eight valence electrons and thus give them the electron configuration of a noble gas, making them stable.
1. What are five examples of observable properties?
Answer:
Color
Size
Texture
Shape
Odor
Hardness
Physical state of matter (whether it is a liquid, solid, or gas)
Explanation:
go ogle
Need Help! 20 Points!!!!!
Give an example of a specialized cell.
Answer:
Muscle cell
Explanation:
An example of a specialized cell would be a muscle cell, which allows muscles to contract. A specialized cell has a specific function.
Answer: muscle cell
Explanation: muscle cell
Which statement would help determine if a cell is a plant or animal cell?
A. If the cell has a cell wall, it can be an animal cell.
B. If the cell has a nucleus, then it can only be an animal cell.
C. If the cell has a cell wall, it can be a plant cell.
D. If the cell has a nucleus, then it can only be a plant cell.
Answer:
C
Explanation:
Only plant cells have a plant wall
WILL MARK BRAINLIST IF RIGHT
What coefficient should be used for oxygen gas to correctly balance this equation
NO LINKS
Since 1:1:3 is the smallest ratio that can be used to balance the chemical equation using whole number coefficients, you can thus say that the oxygen molecule has a coefficient of 3 in the balanced chemical equation that describes the decomposition of magnesium chlorate.
HELPP FILL THE BLANKS QUICK!!! I mark Brainly ’ Remember! Physical change:
Properties remain the______________________
.
_____________________are
.
_____ _________substances are formed.
In a chemical change, the___________
change and the result is__________(can’t go back)
______________New substances produced in a chemical reaction have different______________and
_______________
properties from the original substance.
When chemical bonds break, atoms rearrange, and new bonds form, a______________
has occurred.
When a chemical reaction occurs between two liquids that form a solid, a_____________
is formed.
Properties remain the same
In chemical change, the bonds change and the result is permanent. New substances produced in a chemical, reaction have different bonds and properties from the original substance.
When chemical bonds break..... a chemical change has occurred.
When a chemical reaction occurs between..... a physical change has occurred.
why do you think some countries are still encouraging population growth
Some countries encourage it to maintain their population because people die and thats the truth, thats the first reason and second reason is because more population will boost their economy and business but some other country dont encourage it due to the reasons of chaos and crowds with many population.
WILL GIVE BRAINLIEST !!!!
Answer:
NaI
Explanation:
Sodium has a charge of 1+ and iodine has a charge of 1-. They exist in a one-to-one ratio. Because they are ionic compounds, they go for the lowest ratio available.
I need help writing two paragraph.
Four substances are involved in both photosynthesis and cellular respiration. They are sugars, water, oxygen, and carbon dioxide. Energy is also transformed from one type to another. Describe what happens to these four substances, light energy, and chemical energy during photosynthesis. Then write a simple equation for the substances and another for energy, using words and arrows to illustrate these changes.
Answer:
Pangasinan State University Urdaneta City Campus Bernadette B. Familiar BSCE 1A Gen. Chemistry Problems Caused By Chemistry Chemistry is of great significant value and is not dime-a-dozen. Chemistry is ubiquitotoday would not have been possible. Has an effigy of the world without t
how many covalent bonds are usually formed by the element n?
Answer:
3
Explanation:
N stands for element Nitrogen (Refer to the attachment for Lewis dot structure)
A shampoo
B. chocolate chip cookie dough
C. tap water
D. air
2. Which of the following is a solution?
A concrete
B. sand and water
C. orange juice
D. apple juice
Answer: B) sand and water
Explanation:
because when you mix sand and water the sand does not dissolve in the water
