What is the charge on an electron?
O-1
O 0
O +1
O +2
Answers
Answer:
-1
Explanation:
Because it is the smallest sub-atomic particle
Related Questions
What type of person studies and collects data on the weather?
Answers
Please help me write a portfolio. GIVING BRAINLIEST 10 POINTSFinish drafting a research report about how scientific knowledge has changed over time.
Review the web you completed in the prewrite stage.
You will submit your research report draft at the end of this lesson.
Review the features of a research report:
It provides information focused on a central topic.
It has an introduction that presents the main ideas of that topic.
It groups related facts, definitions, quotations, details, and other information into supporting paragraphs.
It uses content words and has a formal tone.
It uses linking words to connect ideas.
It provides a conclusion that relates to the topic.
It includes multimedia elements such as audio recordings or visual displays.
It contains a bibliography at the end.
Answers
Answer:
bobo ka nman qno yan bobob
2 mins urgent! 15pts! Thank in Advance
Answers
Venus is making soup. She is putting her ingredients into a pot of water. She places small amounts of the ingredients into water and heats up the pot on the stove. She slowly stirs the pot on the stove. What should Venus do to speed up the rate the ingredients are dissolving?
A She should place larger amounts of ingredients into the water.
B She should take the pot off of the heat to lower the temperature.
C She should place the pot in the fridge to cool it down.
D She should stir the pot of ingredients faster.
Answers
Answer:
D
Explanation:
increase in rate of stiring leads to an increase in rate of which the ingredients will dissolve
Answer:
Your answer is D
Explanation:
This is the only viable solution due to the fact that first of all the other options would slow down the dissolving of the ingredients, second of all when you are trying to dissolve ingredients faster you should stir faster because when you stir faster you distribute the particle faster thus speeding up the process. Therefore that is my proof that your answer is D.
Hope this Helps!
11. Hay is made up of organic compounds. What are the main elements in many organic compounds?
Answers
Answer:
35
Explanation:
Earth’s atmosphere contains the element oxygen in two different forms. The chemical formula for oxygen gas is O2. The chemical formula for ozone gas is O3. How does the structure of oxygen gas differ from that of ozone?
I need an explanation and i need it today, thanks!
Answers
Answer:
Ozone is a molecule with three oxygen molecules.It is in the upper atmosphere and it protects living organisms by keeping UV rays from reaching the earth's surface. Ozone (O3) is a triatomic, molecule, consisting of three oxygen atoms. ... O3 is the formula for ozone. It has three oxygen atoms.
Explanation:
My brain
In the structure of oxygen molecule, the two oxygen atoms are held by a double bond while in ozone, three oxygen atoms are held by two equivalent bonds of intermediate bond lengths to a central oxygen atom,
In the molecule O2, we have two oxygen atoms connected to each other by a double bond. The bond order in the this molecule is 2 as shown in the image attached to this answer. The bond lengths in this bond correspond exactly to that of an O=O double bond.
In the molecule O3, we can see that there are three oxygen atoms. The central oxygen atom has two other oxygen atoms attached to it. The bond lengths observed in ozone are intermediate between those of a pure double or pure single bond.
The reason behind this is resonance involving the oxygen atoms.
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What is the role of an electron in an atom
Answers
Answer:
Negative Charged Particle
Explanation:
Electrons are really small compared to everything else in the atom
Electrons give negative charge to the atom, and it balances out the positive charge given by the protons. That's the role of an electron!
Hope this helps!
I just need help all I need is the answer please some one
Answers
Answer: The correct fill-in-the-blank answers are:
1. through binary fission (already filled in)
2. be resistant to penicillin
3. through asexual reproduction.
4. cell replicates before
5. a simpler process
Explanation:
The correct fill-in-the-blank answers are:
1. Bacteria reproduce through binary fission (already filled in)
2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin
3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.
4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.
5. Asexual reproduction is a simpler process than sexual reproduction.
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Could someone help me with the labeling please?
Answers
The periodic table can be found on the internet too
In which are do temperatures range from warm or hot summers to cool or cold winters?
Pls help
Brainliest and 5 star and thanks
OPTIONS BELOW
Answers
Answer:
B
Explanation: because it is most likely to be warm in summers and cool in winters in temperate zones
At 25ºC, the average velocity of a hydrogen molecule is 1.92 x 103 m/s. What is the average velocity of a nitrogen molecule at the same temperature?
NEED WORK
Answers
Answer:
V = 513.36m/s
Explanation:
Temperature (T) = 25°C = (25 + 273.15) = 298.15K
Speed (V) = 1.92*10³m/s
According to kinetic theory of gases, the speed (v) of a molecule is
V= √(3RT / M)
V = speed or velocity
R = ideal gas constant = 0.082J/mol.K
T = temperature of the gas
M = molar mass
Molar mass of hydrogen molecule = 2.0g/mol
Molar mass of Nitrogen molecule = (2×14.0) = 28.0g/mol
Since they're in the same temperature
V1 / V2 = √(M2 / M1)
1.92×10³ / V2 = √(28 / 2)
1.92×10³ / V2 = √(14)
1.92*10³ / V2 = 3.74
1.92*10³ = 3.74V2
V2 = 1920 / 3.74
V2 = 513.36m/s
The velocity of Nitrogen molecule is 513.36m/s
Science:
Describe the characteristics of a Wave: (Amplitude, Wavelength, Frequency plus Wave Speed).
Answers
Waves all have an amplitude which is the height of the wave from sea level, wavelengths which is the distance between crest to crest or trough to trough. Waves also have a frequency which is the number of waves that pass in a given amount of time. Another characteristic of a wave is wave speed. A wave speed is a pace that a wave travels in a given amount of time. (I HOPE THAT HELPED :))
Answer:
No matter whether you are talking about vibrations or waves, all of them can be characterized by the following four characteristics: amplitude, wavelength, frequency, and speed. The amplitude of a wave can be described as the maximum distance the molecules are displaced from their starting place .
Please answer quick!!!
What chemical does the brain release to smother the synapses and stop transmission of the sensation of pain?
Answers
Answer:
neurotransmitter
Explanation:
im 200 iq
100 POINTS+BRAINLIEST: How do you balance a chemical equation step by step? Please explain in simple language, give definitions to complex words and provide some rules to remember when balancing the equations. Use C3H8+O2—> H2O+CO2 as an example. THANKS SO MUCH!!!
Answers
Answer:
list all the elements.
you need to find a number to multiply both sides to get the same result.
example: I said on the left side: 5×O2 which is 10. on the right side I do the same to get 10.
In order to do this I said: 4×H2O which is 8 H2,and 4 O.
I then said 3×CO2 which gives 3 C and 6 O2. 6+4=10.
Now Oxygen(O) is balanced. Do the same for the rest of the elements.
Explanation:
pls mark as brainliest thanks!
Let's use
C3H8+O2—»H2O+CO2Calculate atoms on both sides
On reactant side
C=3H=8O=2On product
H=2O=3C=1Now balance both sides by making atoms equal
The balanced one is
C3H8+5O2—»3H_2O+4CO_2Fill each box with the chemical formula of the compound.
Answers
NaF, NaBr, Na2O, Na2S, Na3N, Na3P, NaI
KF, KBr, K2O, K2S, K3N, K3P, KI
BeF2, BeBr2, BeO, BeS, Be3N2, Be3P3, BeI2
MgF2, MgBr2, MgO, MgS, Mg3N2, Mg3P2, MgI2
CaF2, CaBr2, CaO, CaS, Ca3N2, Ca3P2, CaI2
Hope this helps! Make sure that the numbers are written small at the bottom of the letter cause it wasnt possible to do that here.
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
HELP! 100 POINTS! A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Answers
The average speed of the blocks are 0.36 m/S.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed
with respect to time. As at time t = 0, the speed is
also zero, and at time t = 2.5 s, the speed will be
Speed =
0.9 = 0.36
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.
Answers
Answer:
Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.
Table B: Calculation of Kinetic Energy (KE)
Table B: Calculation of Kinetic Energy (KE)
Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500
To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.
For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2
Perform similar calculations for the other velocities and record the results in Table B.
Answer:
Explanation:mass of the bottle in each case is M = 0.250 kg
now as per given speeds we can use the formula of kinetic energy to find it
1) when speed is 2 m/s
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
Can a solid crystal be composed of molecules?
A
No, crystals are composed of a single type of atom.
B
Yes, as long as the molecules repeat in a regular pattern.
C
No, solids are composed of either molecules or crystal structures.
D
Yes, all solid crystals are necessarily composed of molecules.
Answers
how to use a microscope> Everything I need to know
Answers
Always keep your microscope covered when not in use.
Always carry a microscope with both hands. Grasp the arm with one hand and place the other hand under the base for support.
Step 1: Set Up the Microscope. ...
Step 2: Clean the Lens. ...
Step 3: Prepare a Slide. ...
Step 4: Insert the Slide. ...
Step 5: Set Up for Viewing. ...
Step 6: Set the Light Control. ...
Step 7: Focus the Microscope. ...
Step 8: Increase Magnification.
Answer:
Keep in mind this changes from microscope to microscope.
Explanation:
On most classroom microscopes, there will be two knobs on either side of the scope. These will increase or decrease the height of the "stage", which is how you "focus" the microscope. The larger knob will move the stage the most, and thus, is called the coarse focus. The smaller knob is called the fine focus, and, you guessed it, will move the stage the least. There are usually three "objective lenses". Each will have a different magnification and will be listed on the lens itself. It rotates around the "revolving nosepiece". MAKE SURE THAT THE SLIDE IS LOWERED BEFORE ROTATING THE LENSES!!!! If you don't you WILL break the slide and you WILL get death looks from the teacher.
On the stage, there are two clips. They move NOT up and down, but they spin. what you want to do is to move the slide into the clips. They will not break if you do not bend them more than what the slide will bend them to.
The technique for focusing the microscope is really easy once you do it a few times. After making sure that the microscope is plugged in and the light on and the slide and lens in the lowest position/magnification (!) move the coarse focus knob so that the object in the slide is just visible. Once you do that, from there use the fine focus knob to make the object most visible.
These instructions vary slightly from model to model of microscope, but the picture below is very accurate and everything I warned you about is for all microscopes.
How do animals react to a change of environment when food and water become scarce?
They compete for sunlight.
They find more prey.
They grow in number.
They move to new locations.
Answers
Can some one help? And also explain it? The question is how titan in Saturn evaporated I’m just confused by this question I just don’t know what to write as a response…. Help?!?
Answers
The process of how Titan's atmosphere evaporated is an interesting one. Titan is the largest moon of Saturn and has a thick atmosphere primarily composed of nitrogen, similar to Earth's atmosphere. The evaporation of Titan's atmosphere is related to its surface temperature, atmospheric pressure, and the composition of its atmosphere.
Here's a simplified explanation of how Titan's atmosphere can evaporate:
1. Surface Temperature: Titan is a very cold moon with surface temperatures averaging around -290 degrees Fahrenheit (-179 degrees Celsius). At such low temperatures, some of the gases in the atmosphere, like methane and ethane, exist in liquid form on the surface.
2. Atmospheric Pressure: Despite being cold, Titan's atmosphere is relatively dense, with a surface pressure about 50% higher than Earth's. This atmospheric pressure helps keep the gases in the atmosphere from escaping into space easily.
3. Evaporation: Even at such low temperatures, some of the liquid hydrocarbons on Titan's surface can evaporate and become gases in the atmosphere. This process is similar to how water evaporates from Earth's oceans and lakes, despite not reaching boiling temperatures.
4. Condensation: Conversely, when the gases in Titan's atmosphere lose energy, they can condense and return to the surface as liquid. This is similar to how water vapor in Earth's atmosphere condenses to form clouds and eventually falls as rain.
Overall, the balance between evaporation and condensation in Titan's atmosphere is influenced by its temperature, atmospheric pressure, and the composition of its atmosphere. The low temperatures and high atmospheric pressure allow for the existence of liquid hydrocarbons on the surface and their occasional evaporation into the atmosphere.
I hope this explanation helps you understand how Titan's atmosphere can evaporate despite being a cold moon. If you have any further questions or need more clarification, feel free to ask!
Hydroelectric power plants capture the ______________ of falling water to generate electricity. The falling water turns a wheel called a turbine and ____________________ the mechanical energy of falling water into electrical energy.
Windmills capture the ____________________ of moving air to generate electricity. The moving air turns the blades of the windmill turning a turbine and changes the ___________________ energy of the moving air into electrical energy.
Fill in the blanks!
Thank you!
Answers
Answer:
1: energy
2: converts
Kinetic energy is either 3 or 4, those questions are really similar.
Answer:
1: energy
2: converts
3: energy
4: kinetic
Explanation:
What is causing the increasing amount of CO2 in the atmosphere? What could be done about it?
Answers
The eye symbol represents Which hazards
Answers
Answer:
This one should be REALLY easy for everybody to know but the answer is anything that can pose a hazard to your eyes
Explanation:
Answer:cyclone
Explanation:
Which is a limitation of comparative investigations?
They give results that are usually not repeatable by other scientists.
They might show variable relationships that are not actually cause and effect.
They can usually only be conducted in labs instead of in natural environments.
They are usually inexpensive, but they do not provide new information.
Answers
Answer:
hi............
Explanation:
The images below show two atoms. Using the document and a periodic table, determine the following:
Please answer all parts for full credit! (TOTAL POINTS = 14 pts)
a) What elements are depicted? (2pts)
b) How is each element classified (metal, nonmetal, metalloid)? (2pts)
c) What type of bond would form between these two atoms? (2pts)
d) What would the compound formed between these atoms be named? (4pts)
e) What would the formula be? (4pts)
Answers
Answer:
d
Explanation:
a) Atom 1 has 35 protons and 45 neutrons, which means it is the element bromine (Br). Atom 2 has 12 protons and 12 neutrons, which means it is the element magnesium (Mg).
What is a metalloid?A metalloid is an element that acquires both metal and nonmetal properties. Metalloids have some characteristics of metals, such as being good conductors of electricity, while also having some nonmetallic properties such as being brittle and lacking the ability to be hammered into shape. They are located along the "staircase" on the periodic table, between the metals and nonmetals, and include elements such as boron, silicon, germanium, arsenic, antimony, and tellurium. Metalloids are important in various applications such as semiconductor industry, in which silicon is the most widely used metalloid for the production of computer chips and solar cells.
b) Bromine (Br) is a nonmetal and magnesium (Mg) is a metal.
c) Magnesium (Mg) is a metal and bromine (Br) is a nonmetal, so they would form an ionic bond.
d) The compound formed between magnesium (Mg) and bromine (Br) would be named magnesium bromide.
e) The formula for magnesium bromide is MgBr2, since magnesium (Mg) has a +2 charge and bromine (Br) has a -1 charge.
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What is the oxidation number of Si
Answers
Answer:
0
Explanation:
What information does the periodic table give you?
Answers
The periodic table contains information about each of the known elements. It includes the name of each element, its atomic number, its atomic mass and its chemical symbol.
The periodic table is divided using groups (columns) and periods (rows).
Each specific group or period has a specific pattern in the elements.
The modern periodic table is arranged in order of increasing atomic number.
I’m not really sure what information what you were asking for but I hope this helps..
The modern periodic table was created by Dmitri Mendeleev with the main goal of showing rows and columns with a logic arrangement of chemical elements.
In each column, the groups, the elements have the same number of electrons in the outermost shells. While the rows are called periods or series.
ILL GIVE 30 POINTS TO THE BRAINIEST
How does a balanced chemical equation prove the Law of Conservation of matter?
Answers
Answer:
Every chemical equation follows to the law of conservation of mass, which states that matter cannot be created or destroyed. When you have an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced therefore it is following the law of conservation of mass.
Explanation:
Answer:
A balanced chemical proves the Law of Conservation of Matter because the law stats that matter cannot be created nor destroyed. so, in every chemical reaction the amount of matter will stay the same in the product as it did in the reactant.
In other words, balanced chem equations show that mass in conserved in chemical reactions
hope this helped:)
Explanation: