Answer:
14cm
Explanation:
s x s=area
s²=200cm²
s=14.1421356237cm
s=14cm
(a) Which of these pieces of apparatus is most suitable to measure 70cm^{3} of the solution?
(b) (i) Complete the empty boxes to name the pieces of apparatus below.
(ii) Which method of separation, A, B or C, would be most suitable to obtain pure water from the solution?
(c) Describe how crystals of salt could be quickly obtained from the solution.
Answer:
C
Explanation:
How does the concentration (amount) of carbon dioxide in the affect climate?
A. As carbon dioxide concentrations increase, temperatures decrease.
B. As carbon dioxide concentrations increase, temperatures increase.
C. Carbon dioxide concentrations have no affect on climate.
D. As carbon dioxide concentrations increase, temperatures become more random.
Answer:
A
Explanation:
When the carbon dioxide concentration goes down, temperature goes down. A small part of the correspondence is due to the relationship between temperature and the solubility of carbon dioxide in the surface ocean, but the majority of the correspondence is consistent with a feedback between carbon dioxide and climate.
what is the correct name for Ga(NO2)3?
Gallium Nitrite your welcome
A binary III/V direct bandgap semiconductor called gallium nitride is ideally suited for high-power transistors that can function at high temperatures. It has been widely utilized in light-emitting diodes (LED) since the 1990s. Its chemical formula is Ga(NO₂)₃.
Blu-ray discs are read using a blue light that gallium nitride emits. Gallium nitride is also utilized in lasers, photonics, RF components, and semiconductor power devices. GaN will be used in sensor technology in the future.
Gallium nitride power amplifiers are perfect for microwave and terahertz (ThZ) devices, such as imaging and sensing, the aforementioned future market, due to their capacity to operate at significantly higher temperatures and voltages than gallium arsenide (GaAs) transistors.
To know more about Gallium nitride, visit;
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Given a force of 88 N and an acceleration of 4 m/s2, what is the mass? *
Which elements make up the pain reliever acetaminophen, chemical formula C8H9O2N? Of these elements, which is present in the greatest proportion by number of atoms?
a
Calcium, helium, ozone, and neon, with calcium present in the greatest proportion
b
Carbon, hydrogen, oxygen, and nitrogen, with carbon present in the greatest proportion
c
Calcium, hydrogen, oxygen, and neon, with hydrogen present in the greatest proportion
d
Carbon, hydrogen, oxygen, and nitrogen, with hydrogen present in the greatest proportion
Answer:
Carbon, hydrogen, oxygen, and nitrogen, with hydrogen present in the greatest proportion
Explanation:
Let's consider the chemical formula of acetaminophen: C₈H₉O₂N. According to this formula, in 1 molecule of acetaminophen there are:
8 atoms of carbon (C)9 atoms of hydrogen (H)2 atoms of oxygen (O)1 atom of nitrogen (N)As we can see, the element present in the greatest proportion by number of atoms is hydrogen.
Imagine That you're living in Miami Florida And your family have decided That it's time to move it to the new home. Which of the following Situations would Be Example of External migration? A- Move to Tampa bay Florida B- Move a few streets away C- Move to Atlanta Georgia D- Moved to Mexico
Answer:
Mexico
Explanation:
external migration means move to a different country
Lead (11) oxide dissolves in both
excess dilute nitric acid and
sodium hydroxide solution -
Which of the following is the
property of lead (11) oxide.
A Basic
B Acidic
C Neutral
D Amphoteric
Answer:
bacic
Explanation:
it is very soluble in water
Which of the following statements accurately describes the structure of the atom?
Select one:
a. The protons are located in the nucleus and the electrons and neutrons are located outside the nucleus.
b. The protons and neutrons are located in the nucleus and the electrons are located outside the nucleus.
c. The electrons are located in the nucleus and the protons and neutrons are located outside the nucleus.
d. Protons, neutrons, and electrons are all located in the nucleus.
How many atoms of oxygen (O) are represented in the chemical formula shown below?
2 CO2
1 atom of oxygen
2 atoms of oxygen
6 atoms of oxygen
4 atoms of oxygen
The variables for this experiment include the height of the track and the speed of the car. Use the drop-down menus to complete the sentences and identify the independent and dependent variables. The independent variable, or the one that is intentionally manipulated, is . The dependent variable, or the one the response is measured in, is
Answer:
initial height, speed
Explanation:
Answer:
The variables for this experiment include the height of the track and the speed of the car. Use the drop-down menus to complete the sentences and identify the independent and dependent variables.
The independent variable, or the one that is intentionally manipulated, is
✔ initial height
The dependent variable, or the one the response is measured in, is
✔ speed
Explanation:
These were correct on edge.
Hope this helped!
Does anyone know how to do this?
Answer:
yes
Explanation:
i don't have the periodic table in front of me right now but you will need it. for the first coloumn, look at the elemnt symbol and write it down. for example hydrogen H. the atomic mass will be written on the bottom of the entry. the atomic number is on the top. the number of protons is the atomic number. the neutrons is atomic mass-atomic number and the electrons you have to count the numbers in the upper right corner. depends what element you look at, there might be a couple rows of the electrons which are the shells. hope i helped :)
what type of bond occurs between a metal and a nonmetal
Answer:
Ionic Bonds - A bond between metal and nonmetal elements. Involves transferring electrons. Covalent Bonds - Also known as molecular bonds. A bond between two nonmetals
Answer:
ionic bonds
Explanation:
A bond between metal and nonmetal elements. Involves transferring electrons.
(ii) Describe briefly one chemical test to distinguish dilute
HCI from dilute HNO3
Answer:
By adding, a few drops of AgNO3
Dilute HCl reacts with silver nitrate to give a white precipitate of silver chloride.
On the other hand there is no reaction observed when dilute Nitric acid is treated with silver nitrate solution. That is obvious
Reactions :-
HCl(aq) + AgNO3(aq) >>> AgCl(s) + HNO3(aq)
HNO3(aq) + AgNO3(aq) >>> No reaction + No precipitate
please help I will mark brainliest if you answer first let's see who gets brainliest
Answer:
Winter would be warmer, and summers would be cooler.
Answer:
winter would be cooler and summers would be warmer
Explanation: i am hella late but......
Fossil fuels were formed when living things (plants and animals) died and their remains were broken down. This is an example of _______.
A. Combustion
B. Decomposition
C. Photosynthesis
D. Cellular Respiration
The image above shows a gas held in a chamber with a fixed volume. The gas begins with a temperature 333 K and a pressure of 4.00 atm (green) that increases to 7.65 atm (orange) as the gas is heated. What is the temperature of the gas when the pressure increases to 7.65 atm?
Answer:
636.86 K
Explanation:
From the question given above, the following data were obtained:
Initial temperature (T1) = 333 K
Initial pressure (P1) = 4 atm
Final pressure (P2) = 7.65 atm
Final temperature (T2) =?
NOTE: The volume is constant.
Since the volume is constant, we can obtain the new temperature the gas by using the following formula as illustrated below:
P1 /T1 = P2 /T2
4/333 = 7.65/T2
Cross multiply
4 × T2 = 333 × 7.65
4 × T2 = 2547.45
Divide both side by 4
T2 = 2547.45 / 4
T2 = 636.86 K
Therefore, the new temperature of the gas is 636.86 K
Answer:
It's 637 <3
Explanation:
Round 636.86 to get 637, proven on CK12
Students are to imagine that they are leading a one-week expedition to the Moon’s South Pole. In the essay, students will need to describe to NASA what (and who) they would bring to help make their expedition a success.
Answer:
On Sept. 15, 2020, NASA, in partnership with Future Engineers, launched the Artemis Moon Pod Essay Contest. The contest, which is open to all (public, private, and home school) students in grades K-12, asks participants to imagine they are leading a one-week expedition to the Moon’s South Pole. In the essay, students will need to describe to NASA what (and who) they would bring to help make their expedition a success.
The Moon Pod Essay Contest is presented in support of NASA’s Artemis program. The student challenge is part of NASA’s efforts to engage the public in its missions to the Moon and Mars. NASA is returning to the Moon for scientific discovery, economic benefits, and inspiration for a new generation. Working with its partners throughout the Artemis program, the agency will fine-tune precision landing technologies and develop new mobility capabilities that allow robots and crew to travel greater distances and explore new regions of the Moon.
Explanation:
Answer:
I would bring some warm clothes to keep me warm through the night because South Pole is cold. I would also bring blankets and sticks to make a fire. I would bring my bestfriend to keep me company.
Explanation:
How many orbitals are in the first energy level?
O A. 3
O B. 1
O c. 2
O D. 4
Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?
Answer: The bones block the x-ray particles to pass through it, and a study of the bones is possible using this technology.
Explanation:
Write the term that is suggested by each figure or description
Which statement correctly describes a characteristic that a scientific
measuring tool should have?
A. To be precise, it must be able to make measurements repeatedly
over a long period of time.
B. To be precise, it must be able to make measurements with small
units.
C. To be precise, it must be able to make measurements that are
close to the actual value.
D. To be precise, it must be able to make measurements with both
large and small units.
Answer:
A. To be precise, it must be able to make measurements repeatedly over a long period of time.
Explanation:
The precision of a scientific measuring tool can be defined as how close the values between multiple measurements are to each other, when repeated under the same conditions.
This ultimately implies that, the precision of a scientific measuring tool reflects the reproducibility and repeatability of its measurements, irrespective of how accurate the measurements are.
In science, one of the most effective ways to determine the precision of a scientific measuring tool is to find the difference between the highest and lowest measurements (measured values).
Hence, the statement which correctly describes a characteristic that a scientific measuring tool should have is that, to be precise, it must be able to make measurements repeatedly over a long period of time.
the question is on the pic, thanks :)
What is the energy of a wave with wavelength of 2.25nm?
Answer:
E = 8.84×10⁻¹⁷ J
Explanation:
Given data:
Wavelength of wave = 2.25 nm (2.25×10⁻⁹ m)
Energy of wave = ?
Solution:
Formula:
E = hc/λ
c = 3×10⁸m/s
h =6.63 ×10⁻³⁴ Js
now we will put the values,
E = 6.63 ×10⁻³⁴ Js × 3×10⁸m/s / 2.25×10⁻⁹ m
E = 19.89×10⁻²⁶ Jm / 2.25×10⁻⁹ m
E = 8.84×10⁻¹⁷ J
pls help me with this question pls
Answer:
Answers are below:
Explanation:
There are 18 groups and 7 periods in the modern periodic table. The atomic size and metallic character of elements increase down a group. Also, the atomic size and metallic character of elements decrease from left to right in a period.
Have a good night!
Answer and explain please
Answer:
I can only see b
Explanation:
Answer:
Carbon- 11 has 6 protons in its nucleus and boron- 11 has 5 protons in its nucleus.
Explanation:
note: Carbon has an atomic number of 6
and Boron has an atomic number of 5.
A fish swims 0.8 m/s for 34 m. How much time does it take the fish to swim this distance?
Do not round.
NO UNITS NEEDED.
Answer:
42.4m
Explanation:
Given parameters:
Speed of the fish = 0.8m/s
Distance = 34m
Unknown:
Time taken for the fish to swim = ?
Solution:
Speed is the distance divided by the time taken;
Speed = [tex]\frac{distance}{time}[/tex]
Time = [tex]\frac{distance}{speed}[/tex]
Now, insert the parameters and solve;
Time = [tex]\frac{34}{0.8}[/tex] = 42.4s
What are the defects of Mendeleev's periodic table?
Stote the moderneriodiel
Answer:
8 metal are there in modern periodic table
how do we grow flowers in vase and plastic bags?
Answer:
put soil in the plastic bag.. put seeds. and add water
Explanation:
this is the right answer
Why is a cell membrane like a security guard because.......
Why?????
The cell membrane allows certain items into a cell and blocks others from entering, just like a security guard protects a real factory.
what are examples of chemicals that need to be diluted? i need 4 examples please 20 points!
Answer:
Travelling hygiene
Drink only bottled water.
Don't use tap water to clean your teeth.
When you wash your hands, make sure they are totally dry before you touch any food.
Don't wash fruit or vegetables in unsafe water.