Answer:
True
Explanation:
A proton has a charge of +1, while an electron has a charge of -1. This is why a neutral atom has the same number of protons as electrons.
Neutrons have no charge, hence their name neutron which is similar to neutral.
i have a question, what does a man have to do to get the love of his life.
A man have to get their friend bond with someone they like a lot closer. Then, if the man is ready to confess his feeling, try buying his love of his life their favorite flower or favorite candy/food.
hope this help-(even though im a girl ;v;)
Characteristics used to describe matter are you called
Physical properties are characteristics that describe matter. They include characteristics such as size, shape, color, and mass. These characteristics can be observed or measured without changing the identity of the matter in question.
Answer:
Physical properties
Explanation:
A chemist prepares a solution of sodium carbonate by measuring out of sodium carbonate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's sodium carbonate solution. Be sure your answer has the correct number of significant digits.
Answer:
The correct answer will be "[tex]9.45\times 10^{-5} \ mol/L[/tex]".
Explanation:
We have:
Moles of solute (Na₂Co₃) = [tex]18.9 \mu \ mol[/tex]
= [tex]18.9\times 10^{-6}[/tex]
[tex]1 \mu \ mol[/tex] = [tex]10^{-6} \ mol[/tex]
Now,
The volume of the solution will be:
⇒ [tex]0.200 \ L[/tex]
∴ [tex]{1 \ mL=0.001 \ L}[/tex]
The formula to find the concentration will be:
⇒ [tex]Concentration = \frac{moles \ of \ solute \ (mol)}{Volume \ of \ solution \ (L)}[/tex]
On substituting the given values, we get
⇒ [tex]=\frac{18.9\times 10^{-6}}{0.200}[/tex]
⇒ [tex]=9.45\times 10^{-5} \ mol/L[/tex]
Fill in the blank. An answer would be great right now!!! I’m having trouble with science. thanks!!
Answer:
1. Richter 2. Moment
Hope this helps !!
what is the volume when the density is 7.83g/ml and 19.6 grams?
13. Identify the state(s) of matter described by each statement.
a. has a definite volume
b. has a definite shape
c. completely fills any container
d. flows
e. is made of particles held together in a rigid structure
f. is made of particles that are close together
Answer:
A: solid and liquid
B: solid
C: gas
D: liquid and gas
E: solid
F: solid
Pilots of hot air balloons are able to steer them somewhat by moving them up or down to enter different air currents that move in different directions. Explain how the flame can be used to do that.
Answer:
To understand this first we must understand what is happening at the molecular level. When we heat any substance it changes its state of matter because its molecules get excited. For example, when we heat water it turns into gas so the molecules get excited. The hot air balloon will move faster if we add heat because the gas molecules will get excited and push against the balloon, making it faster. If we start removing heat, the balloon's acceleration will slow down because the molecules will get less excited.
Hot air balloons flies by means of it being lighter than air
The flame can be used to move the pilot to different directions by increasing the temperature of the air in the balloon and therefore, the volume, therefore, decreasing the density of the air which changes the elevation of the balloon to the appropriate elevation having winds moving in the desired direction
The principle by which the above process works is as follows:
According to Charles law, the volume of a mass of gas is directly proportional to its Kelvin temperature
V ∝ T
[tex]\dfrac{V_1}{T_1} = \dfrac{V_2}{T_2}[/tex]
[tex]V_2 = T_2 \times \dfrac{V_1}{T_1}[/tex]
[tex]Density, \rho = \dfrac{Mass, \ m}{Volume, \ V}[/tex]
Therefore, as the temperature is increased, the volume occupied the mass gas increases, and therefore, the density decreases
The principle on which the hot air balloon operates on is the principle that hot air is less dense than and therefore, rises above cool air
Therefore, the pilot of an hot air balloon heats up the air in the balloon to allow the balloon to rise and the pilot switches off the burner so that the air in the balloon cools and the balloon looses altitude
The mechanism of the hot air balloon does not have a steering, and therefore, the wind direction is used to steer the balloon
The direction of the wind is different at different altitude, such that by obtaining the direction of the wind at a given altitude, the pilot can raise or lower the balloon up or down to the altitude having the desired wind direction, by increasing the temperature of the air in the balloon by switching on the burner to go to a higher altitude, or by switching off the burner so the air in the balloon cools and the balloon loses some of its altitude to reach the wind going in the direction of the pilot
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Lisa's Chemistry class was performing an experiment with gas pressures. They filled a container with gas at a pressure of 101,000 Pa at room temperature. When they doubled the temperature, the pressure also doubled. What was the new pressure in scientific notation?
Answer:
2.02 × 10^5 Pa
Explanation:
According to this question, in an experiment, a container was filled with gas at pressure of 101,000 Pa, at room temperature. When this temperature was doubled, the pressure also increased by two times i.e.
The pressure changed to (101,000 Pa × 2) = 202,000 Pa
This question is asking to represent this in scientific notation. Scientific notation aims at representing a small or too large number in an easy way. It is done by making use of power of ten i.e. a × 10^b
Where; a = decimal number
b = power of ten
In the case of a large number like 202,000, the power of ten is derived by counting the decimal place backwards. If we are to count until we stop in front of the last digit, we will have 5 times.
That is; 2.02000 × 10^5
We can remove every trailing zeros
Hence, the answer is 2.02 × 10^5 Pa.
Periodic trends
PLEASE HELP ME OUTT!! I WILL GIVE BRAINLIEST!
Answer:
A. Ba
C. Cu
D. H
Explanation:
HOPE THIS HELPS
When we discuss communication, we often first think of written and oral communication. Write one paragraph about a time when you found it easier to communicate with a graph than with text.
Answer:
There's a lot of answers.
Explanation:
Last year, I presented a paper on population growth in the United States between the years 1975 and 2015. The data involved numbers and figures. This data was difficult to present in textual format, so I turned to graphing. The graph helped me break down and simplify complex numerical data so my audience could more easily understand it.
A time when I found it easier to communicate with a graph than with text was when I wanted to make a presentation about the importance of education.
Communication simply means sending a message from one person to another person. Graphs can be used when one wants to make a visual representation of data.
I used graphs when I wanted to make a presentation about the importance of education. I wanted to show the audience how certain regions like the European countries are well developed than African countries. The graph was vital in visualizing this.
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Which picture shows an example of kinetic energy?
Answer:
the cheta
Explanation:
kinetic means movement
Is the discharging of a battery producing electricity an Intramolecular force or Intermolecular force?
Answer:
I think its intermolecular
Explanation:
I'm sorry if it is wrong
Answer:
intermolecular forces
Explanation:
Which of the following represent a chemical compound? a. Cr b. CO c. Au d. Mg
What is Ammonium bisulfate as a chemical formula?
Answer:
Ammonium bisulfate/Formula
(NH4)HSO4
Reason to answer:
Mark me brainliest
Which element below has atoms with only two valence electrons?
Potassium
Sulfur
Magnesium
Neon
Which of the following is NOT a homogeneous mixture? *
koolaid
soda
tea
water
Answer:
water
Explanation:
Because it does not have more than one component.
What phase of matter would the above substance be at 500⁰C?
Answer:
Is 4 an answer? If so, that is correct
Explanation:
Find the average atomic mass for Cl if 75.78% of Cl atoms are Cl-35 with a mass of 34.96885271 u and 24.22% are Cl-37 with a mass of 36.96590260 u.
Answer:
35.45253819
Explanation:
(0.7578*34.96....)+(0.2422*36.96...)
Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. The average atomic mass of Chlorine is 35.45g.
What is mass?Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.
Average atomic mass = (mass of first isotope× percent abundance of first isotope)+(mass of second isotope× percent abundance of second isotope)
Substituting the given values
Average atomic mass=(0.7578×34.96....)+(0.2422×36.96...)
Average atomic mass=35.45g
Therefore, the average atomic mass is 35.45g.
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NEED HELP ASAP
Select all the correct answers.
Which of these are examples of mixing and separating?
removing seed casings from grains
a soda bottle bubbling when it is opened
a bright copper statue turning green from weathering
removing salt from seawater
water decomposing to oxygen and hydrogen
Answer:
the answer is
removing seed casings from grains
removing salt from seawater
Explanation:
This question is regarding mixing and separating such as a physical change.
a soda bottle bubbling is a chemical reaction
copper statue is a chemical reaction
water decomposing to oxygen and hydrogen is also a chemical reaction
this question is talking about mixing and seperating as a physical change
True/False (A= True & B =False) 46. Blood is a tissue. 47. Elastic cartilage is found in the ears, nose, epiglottis and larynx. 48. If you have a neoplasm you hope it is benign. 49. All cancers are neoplasms but not all neoplasms are cancer. 50. Plasma cells produce Histamine 51. The liver is one organ that can partially regenerate because it is made of epithelial cells 52. Keratin is a waterproofing protein found in epithelial cells
Answer:
46.A 47.B 48.B 49.A.50.A.51.B.52.B
The answer of the questions serially is true, false,false ,true,true,false and false where blood is a tissue which circulated by the pumping organ that is heart.
What is heart?
Heart is a muscular organ which is present in most of the animals , it is responsible for pumping blood via the blood vessels to the entire body.The blood which is pumped carries oxygen and nutrients along with it.Along with it on it's way back to heart it carries carbon dioxide to the lungs.
Heart has an approximate size of a closed fist and is present between the lungs in the middle compartment of the chest. It is divided in to for chambers , the upper chambers called atria and lower ones called ventricles.
The wall of the heart is made up of three layers : epicardium,myocardium and endocardium. It pumps blood with a rhythm which is determined by a group of cells which are called the pacemaker cells present in the sinoatrial node.
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(50 POINTS) Why does the radius of an atom increase as you go down a group on the periodic table?
A) because you are increasing the size of the electrons, which takes up more space
B) because you are adding another outer level of electrons, further from the nucleus
C) because you are adding more neutrons, which reduces the attraction between proton and electron
D) because you are decreasing the pull by the nucleus, allowing the electrons to travel further away
Answer:
B
Explanation:
The atomic radius increases as you go down a group in the periodic table. Atoms get larger because more electrons are being added in higher energy levels, and each energy level is further from the nucleus than the last. Therefore, the atomic radius increases as you go down a group.
What is a Hypothesis?
Answer:
A hypothesis is a claim you make about what you think is going to happen in an experiment.
Hope This Helps
<3
An atom has 17 protons, 18 neutrons and 17 electrons. What is the charge of its electron cloud?
Answer:
Neutral. There are equal amounts of protons or positively charged parts and electrons or negatively charged parts. The neutrons have no net charge which means this atom of chlorine is neutral.
Explanation:
The science of life or living matter in all it’s forms and phenomena? What’s it’s vocab answer?
Answer:
Biology
Explanation:
all smart people i need help
Answer:
its b
Explanation:
Answer: the first box
Explanation:
45.761 g - 42.98 = ___________
I believe your answer would be
2.781
Which term names the longest geologic time frame?
Answer:
Precambrian
Explanation:
Answer:
An Eon
Explanation:
epcohs are the shortest geologic time frame, which make up periods, that make up eras, that make up eons.
The invention of the microscope allowed scientists to see and study cells. True or false
Answer:
True
Explanation:
The electron configuration for aluminum (Al) is shown below:
1s22s22p63s23p1
Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?
A small orange dot is surrounded by 5 concentric circles. The inner ring has green dots at the north and south positions. The second ring has green dots at east and west. The third ring has six dots, at the north, northeast, southeast, south, southwest, and northwest. The fourth ring has dots at the north and south, and the outer ring has one dot at the west position.
A small orange dot is surrounded by two concentric circles. The inner circle has 6 green dots spaced approximately evenly across the circle. The outer circle has 7 dots, also approximately evenly spaced; none are aligned with dots in the inner circle.
An orange dot has 3 concentric circles surrounding it. The innermost circle has green dots at the north and south positions. The center circle has 8 dots spaced unevenly. The outer circle has three dots, spaced so that two are closer to each other than either is to the third.
An orange dot is surrounded by a concentric circle. 13 closely spaced green dots lie on that outer circle.
Answer:
It is the third choice
Explanation:
Just did assignment
Answer:
It's C
Explanation:
what is the mass number? plz help!
Answer:
I believe it is 2?
Explanation:
;v;
