Answer: d=2.70 g/mL
I think
What happens to the air as a stove heats it? This question is about thermal expansion and convection, not “it gets hot”.
20 points for answering
Answer:
When there is heat at the bottom of this air or water, the air or water molecules in contact with the heat start to move, and the molecules spread apart. The heated air or water becomes less dense. It rises up until it gets to air or water with the same density as it has, and when it gets there, it pushes the air or water that was there out of the way. At the same time, new air or water fills the space that was vacated when the heated molecules rose up. The air or water that gets pushed out of the way falls down. This sets up a circular motion. Air or water is heated at the bottom, travels to the top, cools, gets denser, falls, is heated again and the whole cycle starts again. Convection does not occur in space because there is no gravity. Ovens work by convection. The heating coils at the bottom of the oven heat the air which climbs to the top, cools slightly, and falls down again.
Explanation:
Water can exist in all three states of matter.
Describe the arrangement and movement of particles in each of the three states of matter. Explain what happens to the particles in a liquid during boiling.
I'll give someone brainly and thanks if they answered the question correctly. 30 points!!
Answer:
The particles in a liquid move very quickly due to heat while it is boiling and gradually turns to gas
what type of bond holds different water molecules together
HELP NEEDED
How many nanoliters are in 1 liter. Show work
1 000 000 000 nanoliters
The diagram represents liquid water in a pan on a hot plate. The liquid water is boiling and changing into water vapor. The process of boiling water is considered to be a.
Answer:
Sorry i might be wrong but I believe the answer is evaporation
Explanation:
Its says the diagram So is there a diagram u can show us?
Answer:
physical change, because a new substance is formed
Explanation:
Which detail supports the main idea Bats are useful to humans?
Bats often live in large colonies in caves and under bridges.
Bats are the only mammal that truly flies.
Bats eat hundreds of mosquitoes and other annoying insects at night.
Some bats carry rabies, a deadly virus.
Answer:
Bats eat hundreds of mosquitoes and other annoying insects at night.
Which nitrogen base sequence is the partner of C-A-T-C-G-A?
C-A-T-C-G-A
G-T-A-G-C-T
T-G-C-T-A-G
G-C-A-T-G-T
Answer:
The answer should be B. G-T-A-G-C-T
A pairs with T and G pairs with C.
Answer:
It's B, GTAGCT.
Explanation:
PLEASE HELP ASAP I'LL MARK BRAINLIEST
Thank you :)
8. A meteor moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013.
Does this statement describe the meteor’s speed or velocity? 1pt
9. Why did you choose the answer above (explain why)? 1pt
Answer:
Its velocity was 7.8 km/s northward.
Explanation:
Because the meteor was only 45 m wide and was 27,700 km above Earth's surface it was not visible with the aid of a telescope.
HELP ASAP I will mark brainliest
Answer: The last one I think
Explanation:
Answer:
10623.0
Explanation:
Because 3541 is speed per hour
You need to find 3 hours
so multiply 3541 x 3
3541 x 3 = 10623
10623.0How to study for a chemistry exam?
Answer:
post it notes ,snacks , or any think that u love to do or eat when u get it right u can eat it
What is the percent composition by mass of suifur in Na2SO?
(Molar mass of Na2SO.= 142 g/mol)
Answer:
22.5%
Explanation
% composition = Molar mass of S
------------------------ x 100
Molar mass of Na2SO4
= 32.065
------------ x 100
142
=0.225 x 100
= 22.5%
Describe the behavior of water molecules during each stage of the water cycle.
Hurry pls this is due by the end of the class period so like 10 MINUTES HELP
Answer:
chupapi muano goagaag djdu
Round off 35.65 to three significant figures.
help
Name four elements that are similar to Iodine.
Answer:
Chlorine, astatine, bromine, and fluorine.
Answer:
Fluorine, Chlorine, Bromine, and Astatine
Explanation:
they are all in group 17 meaning they have similer chemical properties.
The amount of matter in an object is ___ and a common unit is the ___.
A. mass, mL
B. volume, mL
C. volume, gram
D. mass, gram
Answer:
The answer is D
Explanation:
Mass is the amount of matter in an object and gram is the common unit of measurement of mass
The ion which forms from element 36 is known as
A. Krypton ion
B. Kryptonite
C. kryptonide ion
D. this ion does not exist
why can the charge of the nucleus never be +8
Answer:
it could destroy the nucleus
Explanation:
due too much power going into it
What are the atomic numbers for sodium,iron and sulfur???
Answer: sodium-11 iron-26 sulfur-16
Explanation:
Answer:
sodium:11
iron:26
sulfur:16
Explanation:
pls..give..brainlist...to the..above..person..thx..u
Pls help me its due in 20 minutes.
Answer:
11. 1, 4.5
12. right; 4.5 > 1
13. 10, 3
14. left; 10 > 3
Explanation:
All you're being asked to do is count the squares in the pictures.
11. The number of squares for the left wave from bottom to top is 2, so the amplitude is 1/2 that, 2/2 = 1. For the right wave it is 9 squares from bottom to top, so the amplitude is 9/2 = 4.5.
left amplitude: 1, right amplitude: 4.5
__
12. The right wave has greater amplitude. Evidence: 4.5 > 1. It also takes up more vertical space in the picture.
__
13. It is difficult to determine the wavelength of the left wave, because two full peaks are not shown. If we try to match corresponding points, they appear to be about 10 squares apart.
The right wave has 2 peaks in 6 squares, so about 3 squares between peaks.
left: wavelength 10, right: wavelength 3
__
14. The left wave has greater wavelength. Evidence: 10 > 3.
Answer:
11. 1, 4.5
12. right; 4.5 > 1
13. 10, 3
14. left; 10 > 3
Explanation:
An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:
Answer:
The concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.
Note: The question is incomplete. The complete question is as follows:
An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:
3H2(g)+N2(g)⇌2NH3(g)
At equilibrium, the concentrations are
[H2] = 5.0 M, [N2] = 8.0 M, and [NH3] = 4.0 M.
What were the concentrations of nitrogen gas and hydrogen gas that were reacted initially?
Explanation:
Given the following data:
Concentration of H2 at equilibrium = 5.0 M
Concentration of N2 at equilibrium = 8.0 M
Concentration of NH3 at equilibrium = 4.0 M
The given equilibrium reaction is,
Initial a b c
Change -3x -x +2x
Equilibrium (a-3x) (b-x) +2x
The value of x is calculated from the equilibrium of NH3
Concentration of NH3 at equilibrium = 4.0 M = 2x
x = 2.0 M
Substituting the value of x above
Initial Concentration of H2:
a - 3 × 2.0 M = 5.0 M
a = 6.0 M + 5 = 11.0 M
Initial Concentration of N2:
b - 2.0 M = 8 M
b = 8.0 M + 2.0 M
b = 10.0 M
Therefore, the concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.
QUESTION FOR THE GIRLS!!!!
What do most girls look for in a guy?
Looks?
Height?
Attitude?
Explanation:
The right answer is Look .........
Certain females may only love a male for his looks and money.
Certain females may love a male for his personality.
Certain females may love a male depending on his height.
That's all I know.
how many moles of manganese are in 1 mole of manganese(iv) permanganate
Answer:
4 moles...................
Which molecule is Polar
HF
SiBr4
CO2
CH20
Answer:
Polar molecules have a non-zero net dipole moment. Both CO2 and H2O have two polar bonds. However the dipoles in the linear CO2 molecule cancel each other out, meaning that the CO2 molecule is non-polar. The polar bonds in the bent H2O molecule result in a net dipole moment, so H2O is polar.
Explanation:
If we didn't have joints would our bodies be able to move
Answer:
no
Explanation:
Given the reaction: 2 H2 + O2 => O2 = 2 H2O.
What is the total mass of water formed when 497.80 g of oxygen reacts with hydrogen?
Which expressions are equal to 675? 700 – 25 O 700 – 75 O 600 + 75 O 634 + 31 500 275
Answer:
30
Explanation:
Answer:
The first one, The third one.
700-25, 600+75!
Explanation:
Convert 8.00 x 1020 molecules of H2 to moles.
Answer:
1.33 x 10^-3 mol H2
Explanation:
? mol H2 = 8.00 x 1020^20 molecules H2 x 1 mol H2/6.02 ! 1023 molecules H2 = 1.33 x 10^-3 mol H2
Hope that helps!
8.00 x 10²⁰ molecules of H₂ present in 1.33 x 10⁻³ mole of H₂.
What is mole?Mole is used to define the amount of quantity of any substance and 1 mole equals to the 6.023 × 10²³ elementary entities or atoms in it.
According to the question:
1 mole of H₂ = 6.023 × 10²³ molecules of H₂
or 1 molecules of H₂ = 1 mole of H₂ / 6.023 × 10²³ molecules of H₂
To convert 8.00 x 10²⁰ molecules into mole we calculate as follow:
x mole of H₂ = (8.00 x 10²⁰ molecules x 1 mole of H₂) / 6.023 × 10²³ molecules
x mole = 1.33 x 10⁻³ mole
Hence, 1.33 x 10⁻³ mole of H₂ consist 8.00 x 10²⁰ molecules.
To know more about moles, visit the below link:
https://brainly.com/question/15356425
Help ASAP I will mark brainliest for the correct answer !!!⚡️
Answer:
motion
Explanation:
H2SO3
What does this stand for?
Answer:
It means Sulfurous Acid
Explanation:
Which of the following is not a part of the digestive system
A. Mouth
B.Esophagus
C.Intestines
D.Kidneys
Answer:
Kidneys •_•
Hope this helped <3