Answer:
The head-to-tail rule is used to sum two vectors pointing in the same direction. (Vectors in the same direction are called collinear). The sum vector is slightly moved out of its correct position so that you can see it. For now, to determine if two vectors have the same direction look at a picture or use geometry.
How 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
If we didn't have joints would our bodies be able to move
Answer:
no
Explanation:
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.
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.
What is the pH for a solution that has an OH ion
concentration of 1.0 x 10^4 M?
Select one:
7
4
10
5
Helpppppppppppppppppp
the answer is deceleration.
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:
Gold(III) forms an ionic compound with fluoride. How many atoms of each ion will bond to form an ionic compound?
Question 23 options:
1 gold(III), 1 fluoride
1 gold(III), 3 fluoride
2 gold(III), 3 fluoride
3 gold(III), 1 fluoride
Answer:
1 gold(III), 3 fluoride
Explanation:
It was determined that Plan B would likely limit habitat disruption better than Plan A. State officials, however, decided to go with Plan A. Why did the state officials probably choose Plan A?
Answer: The economic demands of Plan B were too high.
Explanation: During the selection of any action plan to maintain biodiversity, several factors must be considered. These factors include the cost of the plan, the estimated effectiveness of the plan at protecting the targeted populations, and how the plan will affect both humans and other populations in the area.
The chart shows that the approximate cost of implementing Plan A was $5 billion. The approximate cost of implementing Plan B was $30 billion. While Plan B might have been more effective at reducing habitat destruction, and thus maintaining biodiversity, state officials likely chose Plan A over Plan B because the economic demands of Plan B were too high.
Answer: The economic demands of Plan B were too high.
Explanation:
just did it
How does chemistry help the environment?
Answer:
Chemistry can help us to understand, monitor, protect and improve the environment around us.
Explanation:
I hope this helps u! :D
i need help !! pls answer this is due in like 30 minutes!!
20000 nanograms sorry i cant answer the second question
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
Your shopping cart has a mass of 65 kilograms. In order to accelerate the shopping cart down an aisle at 0.3 m/sec2, what force would you need to use or apply to the cart?
Answer:
19.5 kgm/s²
Explanation:
19.5 kgm/s²
3. Find the molar mass of the following compounds:
a. Ammonia NH3
b. Iron (II) Nitrate Fe(NO3)2
Answer: a.4
Explanation:
n=1
h=3
H2SO3
What does this stand for?
Answer:
It means Sulfurous Acid
Explanation:
What is the chemical name for Iridium(V) Oxide?
Answer: Iro2
Explanation:
Iro2 compound name
Iridium(IV) oxide
Names
Chemical formula IrO2
Molar mass 224.22 g/mol
Appearance blue-black solid
Density 11.66 g/cm3
27 more rows
The chemical name for Iridium(v) oxide is Ir02
Write a scientific explanation that compares the electrical forces of ethanol, hexane, and water.
Claim:
Evidence:
Reasoning:
Answer:
"Water and ethyl alcohol will both have dipole-dipole interactions.
Technically they will both have Hydrogen bonding, which is a type of dipole-dipole. This is due to the high electronegativity values of oxygen atoms compared to the carbon and hydrogen atoms the oxygens bond to. This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges.
Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces."
Explanation:
Here is the place I found the answer: https://socratic.org/questions/which-of-these-structures-has-dipole-dipole-interactions-water-h2o-ethyl-alcohol
All of this answer belongs to that person. I do not own any of this information.
When sodium bicarbonate and acetic acid are combined in a beaker and allowed to
run to completion, a small amount of sodium bicarbonate remains unreacted at the
bottom of the beaker at the end of the experiment. This means that the sodium
bicarbonate is the
in this experiment.
A) catalyst
B)product
C)excess reactant
D)limiting reactant
This means that the sodium bicarbonate in this experiment is the Excess reactant.
What is a Reactant?
These are the elements or compounds which are involved in a chemical reaction and react to form the products.
The reactants were sodium bicarbonate and acetic acid with small amounts of the former being unreacted at the bottom of the beaker means it's anm excess reactant.
Read more about Reactants here https://brainly.com/question/6421464
Round off 35.65 to three significant figures.
help
What volume would 3.01•1023 molecules of oxygen gas occupy at STP?
11.2 mL
22.4 mL
11.2 L
22.4 L
Answer:
11.2 L is the correct answer
Explanation:
i took the quiz
Answer:
C) 11.2 L
Explanation:
Develop a hypothesis to explain why bubbles exhaled by scuba divers underwater expand as they float up to the surface of the ocean.
Answer:The bubbles exhaled by a scuba diver grow as they approach the surface of the ocean. The pressure exerted by the weight of the water decreases with depth, so the volume of the bubbles increases as they rise.
Explanation:
What is the concentration of a salt water solution with 15 grams of salt in 100 mL of water?
A. 10%
B. 5%
C. 20%
D. 15%
This problem is providing the mass of salt, 15 g, that is dissolved in 100 mL of water, so its concentration is required and found to be 15 % according to the following calculations:
By mass percent:In chemistry, units of concentration in solutions are used to represent the relative amount of a solute that is dissolved in a solvent. Thus, in this case, we refer to a salt-water solution, whose concentration is calculated via:
[tex]\% m=\frac{m_{salt}}{m_{water}}*100\%[/tex]
In such a way, given the mass of salt, 15 g and volume of water, or solution, 100 mL, one obtains the following:
[tex]\% m=\frac{15g}{100g}*100\% \\\\\% m=15\%[/tex]
Learn more about by mass percent: https://brainly.com/question/5394922
Answer:
D) 15%
Explanation
I WILL GIVE BRAINLIEST !!!
Answer:
The purple are molarity and the green are molality
Explanation:
I think dont kill me if thats wrong
how many moles of manganese are in 1 mole of manganese(iv) permanganate
Answer:
4 moles...................
In which part of a plant cell does photosynthesis occur?
Answer:
leaves,Hope it helps....⋋✿ ⁰ o ⁰ ✿⋌(・o・)
The pieces of the Earth's crust or lithosphere that fit together like jigsaw puzzle pieces are called:
Question 1 options:
subduction plates
continental plates
mountain plates
tectonic plates
Answer:
Tectonic Plates
Explanation:
SANA MAKATULONG TO
AND GOD BLESS
Tectonic plates are pieces of the Earth's crust or lithosphere that fit together like jigsaw puzzle pieces.
What is Lithosphere?This is defined as the rocky outer part of the Earth. It consists of tectonic plates in the form of different pieces.
They also fit together like jigsaw puzzle pieces which was why option D was chosen as the most appropriate choice.
Read more about Tectonic plates here https://brainly.com/question/1162125
why can the charge of the nucleus never be +8
Answer:
it could destroy the nucleus
Explanation:
due too much power going into it
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.
What is the moment for the left hand side of this balance?
Answer:
18
Explanation:
6 (weights) x 3 (distance) = moment
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:
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