explain in complete sentences how a convection current is created
Answer:
Convection currents are caused by the movement of the magma in the mantle.
Explanation:
We are ALWAYS conscious (aware) of why we decide to do the things we do:
True or false
Answer: true
Explanation:
i) Mass of CO2 formed = 2.241 g Molar mass of CO2 = Atomic mass of C + 2 (Atomic mass of O) = 12 + 2 (16) g/mol = 44 g/mol Thus, moles of carbon dioxide formed
Answer:
0.05mole
Explanation:
Given parameters:
Mass of Carbon dioxide formed = 2.241g
Molar mass of Carbon dioxide = 44g/mol
Unknown:
Number of moles of carbon dioxide = ?
Solution:
To solve this problem, we use the expression below:
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Now, insert the parameters and solve;
Number of moles = [tex]\frac{2.241}{44}[/tex] = 0.05mole
There are 12 liters of nitrogen gas in a sample. How many moles of N2 in this sample?
Answer:
0.54 moles of N2
Explanation:
First remember to find the volume in moles, 1 mole equals 22.4 liters.
So now use the dimensional analysis to show your work.
12 liters of N2 * 1 mol /22.4 liters of N2
Now calculate this. 12 * 1/22.4 or 12/ 22.4
12/22.4 = 0.535714286.
12 has two significant digits.
With that, The answer rounds to 0.54.
So that the final answer is 0.54 moles.
Hope it helped!
ILL GIVE BRAINLEIST IF CORRECT:
A jeweler heats a silver strip and bends it into a bracelet. The jeweler then cools the bracelet. What happens to the particles when the strip of silver is heated?
(There may be more than one answer)
A. The particles move farther apart
B. The amount of particles increase
C. The particles get closer together
D. The particles move faster
Answer:
A
Explanation:
When the strip of silver is heated, the silver particles move farther apart.
You have 0.00891 g of platinum. What is this in micrograms?
A. 8.91 ug
B. 8910 ug
C. 8.91 x 10-6 ug
D. 8.91 x 10-9 ug
Answer:
Hope it help you
Stayhomestaysafe
Plz mark my answer brainliest✍️✍️
Explanation:
It would be 8910 ug
REAL NAME - SHRESTH DUBEY
Can somebody plz help answer this question correctly!! (Only 1-2 sentences is good) thanks !!
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDD
I believe the worst form of pollution is fissile fuels because coal takes millions of years to form and why burn something that takes so long to make.
what is the density of 80 gram of a substance occupying a volume of 250 c.m cube at 25°C and 1 atmosphere?
Answer:
Density = 0.32g/mL
Explanation:
Density of a substance can be calculated using the formula:
Density (g/mL) = mass (g)/volume (mL)
According to the information provided in this question, mass of the substance = 80grams, volume = 250cm³/mL
Note that, the pressure and temperature are not needed to calculate the density of the substance.
Density = 80/250
Density = 0.32g/mL
Which option correctly matches the chemical formula of a compound with its
name?
A. N2O5, nitrogen oxide
B. N204, nitrogen oxide
C. N205, dinitrogen pentoxide
D. N204, dinitrogen pentoxide
SUBT
Answer:
N205 dinitrogen pentoxide
Explanation:
Trust me miss gorl
Answer:
the answer above is correct.....
Explanation:
if a solution is given to you, how will you determine whether it is acid,base or salt
Answer:
If your lab has litmus paper, you can use it to determine your solution's pH. When you place a drop of a solution on the litmus paper, the paper changes color based on the pH of the solution. Once the color changes, you can compare it to the color chart on the paper's package to find the pH.
Explanation:
A solution's pH will be a number between 0 and 14. A solution with a pH of 7 is classified as neutral. If the pH is lower than 7, the solution is acidic. When pH is higher than 7, the solution is basic. These numbers describe the concentration of hydrogen ions in the solution and increase on a negative logarithmic scale.
For example, If Solution A has a pH of 3 and Solution B has a pH of 1, then Solution B has 100 times as many hydrogen ions than A and is therefore 100 times more acidic.
Plz help ASAP
Thx sm
Answer:
The answer is B!
Explanation:
Answer:
B
Explanation:
An atom has 24 protons, 22 electrons, and 28 neutrons. What is the MASS # of the atom
The mass of an atom is given by the sum of the number of PROTONS and the number of NEUTRONS since ELETRON'S mass is negligible.
The mass is 24+28 = 52.
What is the answer, and please make it fast.
a. How many moles of H2 are produced from two
moles of CH4 ?
What is the volume of 25 g of ethyl alcohol with a density of 0.79 g/mL?
Answer:
31.64...
Explanation:
The formula is volume is equal to mass over density.
So 25/0.79=31.64...
The volume of ethyl alcohol is 31.645mL.
What is volume?Volume is the amount of space the matter occupies.
What is ethyl alcohol?Ethyl alcohol is a clear, colourless liquid and the main ingredient in alcoholic beverages.
Density = mass/volume
D = m/v
v x D = m
On multiply both sides by D,
v x D/D = m/D
v = m/D
= 25g/0.79g/mL
= 31.645mL
Hence, the volume of ethyl alcohol is 31.645mL.
To learn more about volume and ethyl alcohol here
https://brainly.com/question/21009169
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How many significant figures are there in the measurement 0.0034 Kg?
Answer:
2 significant figures
Explanation:
Your measurement will have 2 significant figures, the two non-zero digits.
I hope this helps you out! :)
Answer:
there are 2 sig figs ( significant figures) which is 34. Zeros are not counted as significant figs in decimals like above
Triassic, Jurassic, and Cretaceous: these are also divisions of the Mesozoic Era
Answer:
correct
Explanation:
thanks for being a smarty pants
What is the name of this molecular compound> F6I5 pleasee and thank youuuu!
Answer:
hexaflourine pentaiodide
Explanation:
f = flourine (6 = hexa)
i = iodine (5 = penta) + ide
How is the periodic table useful today?
Answer:
The periodic table is useful today for finding out all the elements that exists on Earth. The elements there can be used to write down chemical formulas, calculate things like molar mass/atomic mass of each element, atomic number for each, number of valence electrons each element has, the oxidation number for each, etc. Lastly, it can be used to predict the properties of elements yet to be discovered.
Explanation:
Hope it helped!
Please help. I’m really struggling. No wrong answers please, if you don’t know it please don’t answer, I’m already failing the class.
Answer:
K₅Mn₅O₁₆
Explanation:
From the question given above, the following data were obtained:
Potassium (K) = 27.5 %
Manganese (Mn) = 37.5 %
Oxygen (O) = 35 %
Empirical formula =?
The empirical formula for the compound can be obtained as follow:
K = 27.5 %
Mn = 37.5 %
O = 35 %
Divide by their molar mass
K = 27.5 / 39 = 0.705
Mn = 37.5 / 55 = 0.682
O = 35 / 16 = 2.188
Divide by the smallest
K = 0.705 / 0.682 = 1
Mn = 0.682 / 0.682 = 1
O = 2.188 / 0.682 = 3.2 = 32/10 = 16/5
K = 1
Mn = 1
O = 16/5
Multiply by 5 to express in whole number
K = 1 × 5 = 5
Mn = 1 × 5 = 5
O = 16/5 × 5 =16
Thus, the empirical formula for the compound is K₅Mn₅O₁₆
explain what happens differently to an electron to emit different colors of light
Write the balanced chemical equation for the combustion of sodium metal
Answer:
sodium appears as a silvery soft metal that becomes grayish white upon exposure to air
Explanation:
molecular weight 22.989769 g/mol
modify dates 2021 -01-23
create dates 2004-09-16
Emily and Patrick are trying to lift their friend hunter onto a tree branch. Emilio is pushing hunter upward with a force of 250 N. Patrick is pushing hunter upward with a force of 310N. Earth’s gravity is pulling Hunter downward with a force of 520 N
Assume all other forces on hunter are balanced. Which statement describes the forces on hunter ?
Answer:
The forces are unbalanced, so there is net force on the hunter.
Explanation:
To know which option is correct, we shall determine the net force acting on the hunter.
From the question given above, the following data were obtained:
Force applied by Emilio (F₁) = 250 N
Force applied by Patrick (F₂) = 310 N
Force of gravity (F₉) = 520 N
Next, we shall determine the total force applied in lifting the hunter. This can be obtained as follow:
Force applied by Emilio (F₁) = 250 N
Force applied by Patrick (F₂) = 310 N
Total force applied (Fₜ) =?
Fₜ = F₁ + F₂
Fₜ = 250 + 310
Fₜ = 560 N
Finally, we shall determine the net force acting on the hunter. This can be obtained as follow:
Force of gravity (F₉) = 520 N
Total force applied (Fₜ) = 560 N
Net force (Fₙ) =?
Fₙ = Fₜ – F₉
Fₙ = 560 – 520
Fₙ = 40 N
Thus the net force acting on the hunter is 40 N
From the calculations made above, we can see that the net force acting on the hunter is 40 N.
Therefore, the correct answer to the question is:
The forces are unbalanced, so there is net force on the hunter.
Which kind of bond is formed when two atoms share electorons to form a molecule
Answer:
Covalent bond is formed by mutual sharing of electrons between two atoms
Explanation:
Which of the following is NOT a kitchen tool category?
A. Measuring
B. Convection oven
C. Food preparation
D. Cutting
Answer:
B. Convection oven
Explanation:
The following are all in a kitchen tool category;
I. Measuring: this includes tools such as tapes, scale (balance), graded-cup, teaspoon, which are used for taking measurements of food items in the kitchen.
II. Food preparation: it comprises of various tools used in the kitchen for the preparation of food. This includes pots, cooker, spoon, turner etc.
III. Cutting: these are tools used for cutting food items and it include knives, chopping board, grinder etc.
A convection oven is typically designed and developed with multiple fans for circulation of air and as such it is used for baking. It is mainly used in big industries and restaurants.
HELPPP
The sum of percentage compositions must equal to 100 ±0.1.
True
False
Answer:
True
Explanation:
This planet has a toxic atmosphere.
O Mercury
O Venus
O Earth
O Mars
the answer is venus.
What angle do parallel lines form when they intersect?
Answer:When two lines are cut by a transversal, the pairs of angles on one side of the transversal and inside the two lines are called the consecutive interior angles . If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles formed are supplementary
Explanation:
1. Cars use
to run, then they spit out carbon.
uhm they use gas/fuel to run
A gram is one million times larger than a microgram but one billion times smaller than a _______________.