Answer:
oceans
Explanation:
Answer:
D. Ocean
Explanation:
oceans are the majority water on earth's surface located. They hold 97% of earths water.
Question 3
Which of the objects on the shelf has the greatest inertia?
10 kg
5 kg
2kg
a
b
2 kg
5 kg
10 kg
С
d
The all have the same inertia
Another name for a single-celled organism is
A. uni-cellular
B. one cellular
C. multi-cellular
D. eukaryotic
Answer:
A. Uni-cellular
explain the general properties of group 1 elements in relation to their electronic configuration
Answer:
The elements in Group 1 (lithium, sodium, potassium, rubidium, cesium, and francium) are called the alkali metals. All of the alkali metals have a single s electron in their outermost principal energy. ... For example, the electron configuration of lithium (Li), the alkali metal of Period 2, is 1s22s1.
Answer:
they have a mono positive charge of +1
Explanation:
this is due to having one electron in their outermost ns orbital
Is anyone good at chemistry if so can someone help me please ?
(NO LINKS)
Question 15
We're given the [OH⁻] as 8.34 × 10⁻¹² M. Using the formula pOH = -log[OH⁻], the pOH of this solution would be -log(8.34 × 10⁻¹²) ≈ 11.08.
The pOH is, for lack of a better term, the "opposite" of pH: A pOH of 7 is neutral; a pOH less than 7 is basic; and a pOH greater than 7 is acidic.
This follows from the relation, pH + pOH = 14. In this case, with a pOH of 11.08, our pH would be 14 - 11.08 = 2.92, which is acidic (pH < 7).
Thus, the correct answer choice is B.
How many molecules of methane gas (CH4) are in 32.1 grams of methane
Answer:
There are 1.8021⋅1024 molecules of CH4 in 48 grams of CH4 .
Explanation:
hope it helps you
follow me for more
I'm willing to help
PLEASE HELP WILL MARK BRAINLEST!!!
Answer:
C. i don't kow
Explanation:
Help please I’ll mark as brainiliest
Answer:
B B
W BW BW
W BW BW
Explanation:
Hope this helps
Convert 25.4 grams of barium phosphate, Ba3(PO4)2 to formula units.
Which of the following is not a cation?
Iron (III) ion
sulfate
Ca²⁺
Mercurous ion
Answer:
sulfate
Explanation:
because it is anions
1.Calculate the percentage of the components of the compounds resulting from the following reactions
(A) 222.6g N combined fully with 77.4g of O.
(B) Decomposition of table salt which yields 2.62g of Na and 4.04g of Cl.
Answer:
Explanation:
I believe its A
In terms of percentages, what are the 3 biggest uses of natural gases?
1) Using Gas In The Home. In our homes, we end up utilizing the material every day.
2) Use In The Industrial Sector. The industrial sector makes similar use of natural gas liquids as a fuel for process heating and raw material to produce chemicals, fertilizers, and hydrogen.
3) Transportation.
Hope this helps. Btw, I love ur pfp!
Answer:
1) Using Gas In The Home. In our homes, we end up utilizing the material every day. ...
2) Use In The Industrial Sector. The industrial sector makes similar use of natural gas liquids as a fuel for process heating and raw material to produce chemicals, fertilizers, and hydrogen.
3) Transportation.
8. The density of a gas at 350 C is 0,087 g/L. Compute the density at STP.
Answer:
0.20 g/L
Explanation:
Step 1: Calculate the molar mass of the gas (M)
At T = 350 °C = 623 K and P = 1 atm (we will assume this data), the density (ρ) of the gas is 0.087 g/L. We can calculate the molar mass of the gas using the following expression.
ρ = P × M/R × T
M = ρ × R × T/P
M = 0.087 g/L × (0.0821 atm.L/mol.K) × 623 K/1 atm = 4.5 g/mol
Step 2: Calculate the density of the gas at STP
At standard temperature (T = 273.15 K) and standard pressure (P = 1 atm), the density of the gas is:
ρ = P × M/R × T
ρ = 1 atm × 4.5 g/mol /(0.0821 atm.L/mol.K) × 273.15 K = 0.20 g/L
17.4 mL of unknown H2SO4 solution was titrated by 0.20 M of NaOH. 41.51 mL of that NaOH solution was consumed to exactly completely neutralize the acid. What is the original molarity (in M) of the unknown H2SO4 solution?
Answer:
0.24 M
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O
From the balanced equation,
The mole ratio of the acid, H₂SO₄ (nₐ) = 1
The mole ratio of the base, NaOH (n₆) = 2
Finally, we shall determine the molarity of the acid. This can be obtained as follow:
Volume of acid, H₂SO₄ (Vₐ) = 17.4 mL
Molarity of base, NaOH (M₆) = 0.20 M
Volume of base, NaOH (V₆) = 41.51 mL
Molarity of acid, H₂SO₄ (Mₐ) =?
MₐVₐ / M₆V₆ = nₐ / n₆
Mₐ × 17.4 / 0.2 × 41.51 = 1 / 2
Mₐ × 17.4 / 8.302 = 1 / 2
Cross multiply
Mₐ × 17.4 × 2 = 8.302
Mₐ × 34.8 = 8.302
Divide both side by 34.8
Mₐ = 8.302 / 34.8
Mₐ = 0.24 M
Therefore, the molarity of the acid is 0.24 M
In a simple food chain, a frog eats insects and a snake eats the frog. The primary role of the frog in the food chain is?
Answer:
It is clear from the above food chain that the grass occupies the first topic level which consists of producers. The second tropic level consist of primary consumers which is Insect. And the Frog assign the Third tropic level of food chain consisting of secondary consumers.Explanation:
How many atoms are there in two molecules of water?
a. 3
b.4
c.5
d.6
Answer:
the answer is 4
Explanation:
your welcome lol
How is water used in society
Answer:
Water can be used for direct and indirect purposes. Direct purposes include bathing, drinking, and cooking, while examples of indirect purposes are the use of water in processing wood to make paper and in producing steel for automobiles. The bulk of the world's water use is for agriculture, industry, and electricity.
Explanation:
Answer:
water is used for drinking, bathing, cooking, agriculture etc
difference between vegetative and reproductive part
Answer:
The vegetative parts includes the roots, stems,leaves and the reproductive parts include flowers. ... The vegetative parts can reproduce new plants by the process of vegetative propagation but the reproductive parts cannot produce new plants directly instead they produce precursor of new plants that are seeds or fruits.
sketch the electrolytic cell for converting alumina to aluminum
A mixture of NO2 and N2O4 gas is at equilibrium in a closed container. These gases react with the equation 2NO2 ⇌ N2O4. What will happen if the size of the container is increased?
Answer:
Equilibrium will shift leftwards towards NO2.
Explanation:
Hello there!
In this case, according to the Le Cha telier's principle, it is possible to realize that the increase of the volume turns out in the shift towards the most of the gaseous moles are in; in such a way, for the given chemical reaction, we can notice how NO2 (reactant side) has the most of the moles (2 moles in comparison to 1 mole of N2O4); and therefore, by increasing the volume, the equilibrium will shift to it, it means leftwards.
Best regards!
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place
over the next few minutes?
Molecules in both the metal and the surrounding air will start moving at lower speeds.
Molecules in both the metal and the surrounding air will start moving at higher speeds.
The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer:
molecules will speed up
Explanation:
A sample of an unknown compound is vaporized at 130°C . The gas produced has a volume of 1280mL at a pressure of 1.00 atm and it weighs 4.03g
Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits.
Five identical test tubes are each filled from the following five copper (11) sulfate stock solutions. Which of the following test tubes would appear the lightest blue?
a) Stock solution made form 0.200 moles of CuSO4 dissolved to a total volume of 400 ml
b) Stock solution made form 0.150 moles of CuSO4 dissolved to a total volume of 300 mL
C)Stock solution made form 0.250 moles of CuSO4 dissolved to a total volume of 500 ml
d) Stock solution made form 0.175 moles of CuSO4 dissolved to a total volume of 400 ml
e) Stock solution made form 0.125 moles of CuSO4 dissolved to a total volume of 300 ml
Answer:
deez cutz
Explanation:
did i get it right
QUESTION 13
What is the boiling point of a 0.50 m aqueous solution of Al(NO 3) 3?
(The boiling point elevation constant for water is 0.512 °C/m.)
O a. 100.51 °c O b. 101.02 °c O C. 102.05 °C 0 d. 106.60 °C
Answer:
b. 101.02°C
Explanation:
The elevation of boiling point in a solvent due the addition of a solute is a colligative property called Boiling point Elevation. The formula is:
ΔT = Kb*m*i
Where ΔT is change in boiling point
Kb is boilinig point elevation constant = 0.512°C/m for water
m is molality of the solution = 0.50m
And i is Van't Hoff Factor (4 for the Al(NO₃)₃ because its disolution produce 4 ions)
Replacing:
ΔT = 0.512°C/m*0.50m*4
ΔT = 1.02°C
As the boiling point of pure water is 100°C and the increasing is of 1.02°C, boiling point of the solution is:
101.02°C
Right option is:
b. 101.02°C
Obsidian _____.
is formed from sand and quartz
cools very quickly
has large mineral crystals
cools very slowly
Answer:
Cools Very Quickly
Explanation:
This is the right answer!
What does the esophagus connect?
the intestine to the colon
the intestine to the mouth
The stomach to the intestine
the mouth to the stomach
Answer: it think it would be last one. the mouth to the stomach is the answer.
Explanation:
Answer:
The correct answer is D! The esophagus connects the mouth to the stomach.
Explanation:
The mouth is connected to the esophagus, which in turn is connected to the throat. The throat, in turn, connects the mouth to the stomach.
I had this on a science test and I got it right :D
I hope this helps! ;)
The three elements in the photos all belong to the same group, or column, of the periodic table. These elements all produce salts when they react
with metals. What are some differences between these elements?
Choose all that apply.
Answer:
The answer is Color,atomic mass, state of matter of each element.
Explanation:
The volume of a gas-filled balloon is 20.0 L at 60 atm pressure. What volume in liters will the balloon have at 30 atm?
Answer:
40 litres
Explanation:
using Boyle's law V1P1=V2P2
V1=20 l
P1= 60atm
P2= 30 atm V2=?
substituting we will have that
20×60=V2×30
V2={20×60}/30
V2=40 l
We measure force in units called
A chemist weighed out 7.22 g of silver. Calculate the number of moles of silver she weighed out.
Be sure your answer has the correct number of significant digits.
Answer:
0.067 mole Ag°
Explanation:
Given 7.22 g Ag° = 7.22g Ag/ 107.8g/mol = 0.0670 mole Ag° (3 sig. figs.)
Why do you think it would be important for scientists to test local water?
Answer:
It would be important because they will know if the water is infected by some type of disease or harmful bacteria
Explanation: