Which characteristic does lithium, carbon and fluorine have in common:
1. They belong to the same group
2. They have the same number of valence electrons
3. They are all non-metals
4. Their atoms have the same number of energy levels
Answer:
I think the answer is
2) They have the same number of valence electrons
A higher-frequency wave has more energy than a lower-
frequency wave with the same amplitude.
Construction crews sometimes use this reaction for welding underwater structures: Fe2O3 2Al → Al2O3 2Fe How many moles of iron (Fe) would be produced if 2. 50 mol Fe2O3 react? Make sure to use the correct number of significant figures in your answer. 2. 50 mol Fe2O3 = mol Fe.
Answer:
5.00
Explanation:
A compound is composed of 62.1% carbon, 24.1% nitrogen, and 13.8 % hydrogen and has a molar mass of 116.0 g/mol. Determine the Empirical and Molecular formulas of the compound.
which green house gas is produced by commercial refrigeration and air conditioning systems
Answer:
fluorinated gas.
Explanation:
Let me know if this helps
what substance melts ice the fastest science project
Answer:
Salt
Explanation:
salt particles make it harder for water particles to freeze back onto the ice
ice that is in contact with dissolved salt melts faster
Please help asap chemistry homework
Hope it helps.
If you have any query, feel free to ask.
what are the substances you start with in a chemical reaction called.
Methane Gas (CH4) is an example of a(n) __________. *
When drinking water, how soon does it reach the bladder.
Answer:
Water absorption can occur as soon as 5 minutes after ingestion and peaks around 20 minutes after ingestion.
Explanation:
8
in the respiratory system Is most affected by rib damage
a.
bronchodilatation
b.
inspiration and expiration
is most affected by rib damage
C.
humidification of the air
d.
movement of mucus from lungs
Answer:
Pneumonia: movement of mucus from lungs
Explanation:
Pneumonia is an infection that inflames your lungs' air sacs (alveoli). The air sacs may fill up with fluid or pus, causing symptoms such as a cough, fever, chills and trouble breathing.
Pls give brainlist
1. Which of these sentences tells a main idea of "Starting Small," the article you just read?
Ella Bradna began performing on her own at age eleven.
Girls are more likely to become circus performers than boys.
Successful circus performers start training when they are children.
Today you can't be a circus performer until you're an adult.
Answer:
"successful circus performers start training when they are children"
Explanation:
this explains it well because most skills start at a young age.
Answer: Successful circus performers start training when they are children.
Explanation:
How many carbon atoms are there in a propane molecule?.
Answer:
3
Explanation:
The propane molecule has three carbon atoms and eight hydrogen atoms (C3H8).
I will give Brainliest!!! What kind of atoms makeup C12H22O11?
Answer:
carbon, hydrogen, and oxygen atoms
Explanation:
brainliest pls
What are the functions of cardiovascular/circulatory
Answer:
The circulatory system (cardiovascular system) pumps blood from the heart to the lungs to get oxygen.
Explanation:
"The heart then sends oxygenated blood through arteries to the rest of the body. The veins carry oxygen-poor blood back to the heart to start the circulation process over".
HELP PLEASE WILL GIVE 45 points
Answer:
high melting points.
good conductors of electricity.
good conductors of heat.
high density.
malleable.
ductile.
Explanation:
Here is ur paragraph:
Metals have many interesting properties. Metals have high melting points, for example, Gold's melting point is 1948 degrees Fahrenheit. They are also good conductors of heat and electricity. They have high density and are malleable. They are also ductile. Platinum and Gold are very widely used for these reasons.
i will give Brainliest!!! What kind of atoms make up C12H22O11?
There are 12 Carbon atoms, 22 Hydrogen atoms and 11 Oxygen atoms.
Please help me with this please help
Answer:
I did this in class give me 10 min so i can find the anwsers
Explanation:
would marbles be considered an insulator or conductor
_____ forces can cause an object to accelarate
Answer: Unbalanced Forces
Explanation: The bigger the unbalanced force acting on the object the bigger the acceleration of the object. The more mass the object has, the more inclined it is to resist any change to its motion.
How many moles of oxygen (O2) are present in 33. 6 L of the gas at 1 atm and 0°C? 1. 5 2 22. 4 32.
The number of moles of oxygen in the gas is 1.5 L.
The correct option is (A).
What are moles?The mole is the International System of Units' foundation unit of material quantity.
Given,
The volume of gas is 33.6 L
Pressure is 1 atm.
Temperature is 0°C
Molar gas volume is 22.4 L
There is no temperature and pressure is 1 atm.
By formula of moles, volume is divided by molar mass
[tex]\bold{\dfrac{33.6}{22.4 } =1.5\; mole}[/tex]
Thus, option A is correct. 1.5 L.
Learn more about gas, here:
https://brainly.com/question/13123721
what is the molar mass of aluminum (Al)
Answer:
26.981539 u
Explanation:
One mole of Al atoms has a mass in grams that is numerically equivalent to the atomic mass of aluminum. The periodic table shows that the atomic mass (rounded to two decimal points) of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.
Answer:
2.68573957
Explanation:
4) How many grams are in 4.63 x 102 moles of CC14?
Answer:
n=mass/molar mass
mass=?,molar mass=12+(35.5)4=154g/mol.n=4.63x10²
mass=4.63x10²x154=7128g
What is an example of relative dating?
What is an example of absolute dating?
Explanation:
relative dating is an absolute dating is used to meet a historical remaining while relative dating to meet eligible single man. Absolute methods today can be dated in time order in the fossils and absolute dating is dated in the other layers. Posts about the relative geologic age and the rocks.
Answer:
Relative dating is used to determine the age of something based on their appearance. For example, soil that is on the surface is younger than the soil deeper down.
Absolute dating examples are finding the age of wood using carbon dating.
Explanation:
Why it is important not to allow children to handle money
Answer:
Because children will buy irresponsible things wid it like candy and toys but if u give them the money SPECIFICALLY for that then its fine or they will just draw on it or rip it lol
Explanation:
have a nice day :)
Observations After Interaction Steel Wool + Oxygen
Answer:
By placing the steel wool in a jar with plenty of oxygen and water, you start a chemical reaction. The iron and the oxygen react to form a new reddish-brown substance, called iron oxide or rust. In this experiment, the water level in the glass should rise as the oxygen inside combines with the iron in the steel wool.
Explanation:
The pressure exerted on a 254.5 mL sample of helium gas at constant temperature is increased from 0.4750 atm to 0.778 atm. Calculate the final volume of the sample.
Answer:
155.382 mL
Explanation:
Using Boyle's Law
P1V1=P2V2
P1= Initial Pressure
V1= Initial Volume
P2= Final Pressure
V2= Final Volume
0.4750 atm (254.5mL)= 0.778 atm (V2)
120.8875= 0.778 atm (V2)
V2= 155.382 mL
What is the ratio of 32oz of fuel to oil for 25 to 1.
Answer:
25 to 1 fuel mix 1 gallon
Explanation:
Add two of the 2.5 ounce containers to 1 gallon of gas. For a 50:1 ratio add 1 container 2.5 ounces to 1 gallon of gas. 50=parts of fuel 1=parts of oil . For 25:1 and 2 of the 2.5 oz containers to 1 gallon of gas.
Water (H2O) forms when hydrogen gas (H2) and oxygen gas (O2) react according to the equation below: 2H2 O2 → 2H2O What mass of water forms when 1. 45 × 10-3 g O2 react completely? (Molar mass of O2 = 32. 00 g/mol; molar mass of H2O = 18. 02 g/mol) 1. 63 × 10-3 g 8. 16 × 10-4 g 1. 29 × 10-3 g.
The mass of water formed in the reaction is [tex]\rm 1.63\;\times\;10^-^3[/tex] g. Thus, option A is correct.
The balanced chemical equation for the formation of water is:
[tex]\rm 2\;H_2\;+\;O_2\;\rightarrow\;2\;H_2O[/tex]
From the balanced chemical equation, 1 mole of oxygen forms 2 moles of water.
Computation for the mass of waterThe moles of a compound is given by:
[tex]\rm Moles=\dfrac{Mass}{Molar\;mass}[/tex]
The moles of oxygen reacted in the reaction are:
[tex]\rm Moles\;O_2=\dfrac{1.45\;\times\;10^-^3\;g}{32\;g/mol} \\Moles\;O_2=0.045\;\times\;10^-^3\;mol[/tex]
The moles of water formed is:
[tex]\rm 1\;mol\;O_2=2\;mol\;H_2O\\0.045\;\times\;10^-^3\;mol\;O_2=0.045\;\times\;10^-^3\;\times\;2\;mol\;H_2O\\0.045\;\times\;10^-^3\;mol\;O_2=0.09\;\times\;10^-^3\;mol\;H_2O[/tex]
The moles of water formed are [tex]\rm 0.09\;\times\;10^-^3[/tex] mol.
The mass of water is given as:
[tex]\rm Mass=Moles\;\times\;Molar\;mass\\Mass\;H_2O=0.09\;\times\;10^-^3\;\times\;18\;g\\Mass\;H_2O=1.63\;\times\;10^-^3\;g[/tex]
The mass of water formed in the reaction is [tex]\rm 1.63\;\times\;10^-^3[/tex] g. Thus, option A is correct.
Learn more about mass formed, here:
https://brainly.com/question/7324123
Answer: A
Explanation: 1.63 × 10^-3 g
Explain how intermolecular attractions between molecules influence the bulk of properties of a material
Answer:
Intermolecular forces determine bulk properties, such as the melting points of solids and the boiling points of liquids. Liquids boil when the molecules have enough thermal energy to overcome the intermolecular attractive forces that hold them together, thereby forming bubbles of vapor within the liquid.
