Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaCl, or 58.44277 grams.
Explanation:
I hope this helps!!
Answer:
260 grams sodium chlorate
Explanation:
moles to grams multiply by formula weight.
grams to moles divide by formula weight.
sodium chlorate => NaClO₃
=> formula wt = Na + Cl + 3O = [1(23) + 1(35) + 3(16)]g/mole = 106g/mole
∴ grams NaClO₃ = 2.45 mole x 106 g/mole = 259.7 grams ≈ 260 grams
4) Calculate the net force *
3 N
10-7= 3
the arrows are opposing each other.
Answer:
The net or resultant force depende on the direction we can easily understood the directions are opposite .Force is vector so if vectors are opposite we difference the two vectors.
10N-7N=3N
Which type of prevailing wind would carry more water vapor (humidity)? (Choose one)
a. A global wind moving over the ocean
b. A global wind moving over land
Answer:
a global wind moving over the ocean
Explanation:
because it's picking up moisture from the ocean and kind of carrying the water with the wind and water obviously is part of the evaporation so it would kind of turn into water vapor which will have more humidity along with the heat because how the heat warms the water kind of like the sweat from a sweat glands if that makes sense I don't know if that makes sense to you but it makes sense to me lol
11.
The characteristics of a group of elements are listed in the table.
Characteristics of a group of Elements
• Solid at room temperature
• Good conductor of electricity
• Atoms have one valence electron
Which of these elements is in this group?
A. Sodium
B. Phosphorus
C. Bromine
D. Neon
Answer:
Sodium
Explanation:
I dont know but its a wild guess
Answer:
sodium
Explanation:
its solid at room temp, most metals are good conductor of electricity and also its in group 1A so it has one valence electron
Did the argon change state as you heated the atoms?
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. Solids, liquids and gases all expand when heat is added. When heat leaves all substances, the molecules vibrate slower. So yes, it can if the heat is strong enough to change the objects compesistion! :)
Argon is a noble gas. It always exists in the form of gas. The boiling point of argon is very higher and thus we cant change its state, by simply heating.
What is argon ?Argon is 18th element in periodic table. It has 18 electrons and 18 protons. The mass number of argon is around 36 g/mol. Argon is included in the group 18 called the noble gases.
All the noble gases are highly stable and they are not reactive at normal conditions. They cant be easily form compounds or change their state by excitation or photochemical reaction.
Argon has higher melting point and boiling point. It cannot be easily transformed to another state by simply heating. But there occurs electron excitation, where the phase change cannot occurs.
Find more on argon:
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Due tonight! Please help!
Please show your work and don’t spam or delete answers
I will mark Brainliest!
Calculate the concentration in grams per liter of a 450.0 mL solution containing
0.0762 moles of iodine gas (I2)
Answer:
42.98 g/L
Explanation:
Are humans more similar to trees or bacteria? How do you know?(1 point)
A
Humans are more similar to bacteria because trees cannot move around their environment.
B
Humans are more similar to trees because bacteria are too small to see.
C
Humans are not similar to trees or bacteria. Humans are a special species that is not related to any other species on Earth.
D
Humans are more similar to trees because all plants and animals are part of the same domain.
Answer:
a
Explanation:
Answer:
Option D
Explanation:
A and B both make sense to some level.
For option A,trees can only move while bacteria and humans can both move and locomote so there's that similarity
For option B,humans and plants are not micro organisms but bacteria are so there's that similarity
Option C is just not true
Option D is the right answer thus both humans and animals are eukaryotes
Algae and other phytoplankton are the major producers of the earth's:
oxygen
carbon dioxide
hydrogen
nitrogen
Answer:
oxygen
Explanation:
pls mark me brainliest right
A magnet can pull the iron filings out of a mixture of sand and iron
filings.
TRUE
FALSE
Answer:
this is true
Explanation:
because the sand is left behind for it isn't magnetic
Cyclopropene decomposes to propene when heated to 500 C, calculate rate constant for the first order reaction 0 min 1.48 mmol/L
Answer:
k = 0.0306 min-1
Explanation:
The table is given as;
Time, Concentration
0 1.48
5 1.27
10 0.98
15 0.84
The integrated rate law for a first order reaction is given as;
ln [A] = -kt + ln [Ao]
where;
[A] = Final Concentration
[Ao] = Initial Concentration
k = rate constant
t = time
In the table, taking the first two sets of values;
t = 5
k = ?
[Ao] = 1.48
[A] = 1.27
Inserting into the equation;
ln(1.27) = - k (5) + ln(1.48)
ln(1.27) - ln(1.48) = -5k
-0.1530 = -5k
k = -0.1530 / -5
k = 0.0306 min-1
A tall stack of books is sitting on a table. One of the reasons the book stay where they are is because-
Choices:
A: The chair is helping to hold the table up.
B: The table is exerting a balanced force on the books.
C: The books are exerting an unbalanced force on the table.
D: The books keep shifting enough to keep the stack balanced.
Please help me!
What has to be equal on both sides of the chemical reaction in order for it to be balanced?
total number of molecules
sum of the subscripts
total number of atoms
sum of the coefficients
Answer:
total number of atoms
Explanation:
if you have 6 carbon atoms in reactants then you should have 6 carbon atoms in products.
what is the uncertian digit in 0.054 g
Answer:
5.4g
Explanation:
where are examples of short term enivronmental change? check all that apply
A. tsunamis
B. El Niño
C. large asteroid and comet impacts
D. volcanic eruptions
E. global warming
2. How would type of substance affect the rate of reaction?
Answer: IN terms of the collision theory, increasing the concentration of a reactant increases in the number of collisions between the reacting species per second and therefore increases the reaction rate.
Explanation: hope u get it right
how many helium atoms are in a mole of helium?
Answer:1 mole of helium gas contains 6.02 x1023 helium atoms
Explanation:I hope this helps
Please help! It’s due today. I’ll give brainliest
True or False: if chemicals behave in a similar way they are grouped together on the periodic table
Answer:
Explanation: it is true
Which of the following is not a stimulus?
A hearing a loud noise
B. sneezing
C. touching a hot object
D. tasting a lemon
Answer:
B. sneezing
Explanation:
Because every other one is an action resulting in stimulation.
What is correct about solubility of
substances?
when the other girl thicc
Explanation:
let's make this swamp great again
I'll give brianliest if correct .
Answer:
the answer is decaying wood
What is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution?
Answer:
D
Explanation:
all ya got to do is divide the moles from the solution... so 3.0 divided by 0.25. put it in a calculator
hope this helps
The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
What is Molarity?Molarity of a given solution is known as the total number of moles of solute per litre of the solution. A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
The unit of molarity is mol L⁻¹.
Molarity is temperature dependent because as temperature changes, volume of the solution also changes.
Given,
3.0 moles of Saline (NaCl)
Volume of solution = 0.25L
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
Molarity = 3 ÷ 0.25 = 12 M
Therefore, The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
Learn more about molarity, here:
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Which mutation in a fruit fly could be passed on to its offspring
Is a blender (at home) an example of electrical to mechanical energy? If so, why? Please explain thoroughly
Answer:
Yes it is
Explanation:
You use electricity to power the blender itself, then after you power it the potential energy becomes kinetic energy which equals mechanical energy in the blender. So yes, a blender is an example of electrical to mechanical energy.
how many Valance electrons does Bismuth have?
please help me. i'm doing a test
Answer:
5 valence electrons
Thus, bismuth would have 5 valence electrons
Explanation:
Hope it helps
Will mark branliest!! and 50 points for right answer!
1. which solvent resulted in the best separation of ink? oil or alcohol
2. which marker had a red spot or streak with an Rf value of approximately 0.82? Maker 1, 2, 3, or none?
3. which spot has the lowest rf value in the marker 3s chromatogram? yellow or purple?
4. which marker had a yellow spot with an rf value of approximately 0.60? Marker 1,2,3 or none?
Answer:
Alcohol, 0.63 I don't know the rest the rest
Explanation:
Answer:
Explanation:
1. Alcohol
2. Marker 1
3. Purple
4. Marker 2
Filling out the lab paper gives you the answers. These were all correct.
I need help, please answer
Answer:
it explodes
Explanation:
Answer:
Mrs girl I'm sorry I don't know
I just need the points
True or False
All cells are the same on the inside
HELP ME!
What is the percent of phosphorus by mass in phosphoric acid,
H3PO4?
Use 1.008 g/mol for the molar mass of hydrogen, 16.00 g/mol
for the molar mass of oxygen, and 30.97 g/mol for the molar
mass of phosphorus.
Really need help!! Don’t understand:( 40 points
If 100.0g of nitrogen gas (N2) is reacted with 100.0g of hydrogen gas (H2) what is the limiting and excess reactants?
Hint: convert grams to moles for each reactant and then convert to moles of NH3. You need your balanced equation from answer 1 to determine the mole relationship between each reactant and the product NH3. Use the periodic table to determine the molar mass of all chemical formulas. Fill in the “?” Blanks below to show your work.
Please please please fill in the blanks...
Molar mass of H2= ____ g/mol
100.0g H2 • 1 mol H2/? g H2 • ? Mol NH3/ ? Mol H2 = ? Mol NH3
Molar mass of N2= ? g/mol
100.0g N2 • 1 mol N2/ ? g N2 • ? Mol NH3/ ? Mole N2 = ? Mol NH3
Molar mass of NH3 = ? g/mol
100.0g N2 • 1 mol N2/ ? g N2 • ? Mol NH3/ ? Mol N2 • ? g NH3/ 1 mole NH3 = g NH3
Pretty please help me :( PWEAASEEEEEEE