Answer:
Explanation:
Convection currents generated within the asthenosphere push magma upward through volcanic vents and spreading centres to create new crust.
8.00x1019 molecules HCN to grams
Answer:
g HCN = MW HCN g/mole HCN * [8.00E19 molecules/6.022E23 molecules/mole HCN] = ??
EmForm = CaxPy
moles Ca = 0.66g / atwt Ca g/mole = ??
moles P = (1.00-0.66)g / atwt P g/mole = ??
x/y = moles Ca / moles P = ?? (express as ratio of two numbers; if both are not intergers multiply each by the same number that make them integers. This ratio gives the empirical formula.
Ca3P2
Plug and SOLVE
Which best explains the statement "It has no definite volume”?
Its atoms can widely spread out.
Its atoms stay closely packed.
It’s highly viscous.
It’s highly crystalline.
Answer:
D
Explanation:
Non-malleable, less dense, insulators and brittle describe what physical property group?
metals
metalloids
non-metals
transition metals
metalloids is the answer
Answer: non-metals
Explanation:
How many (s) sublevels are present in calcium atom (Ca)?
Answer:
nineteen atoms
Explanation:
nineteen atoms
PLS ANSWER FAST THANK YOUU
Answer:
c
Explanation:
I need help please and give me an explanation
The density of 25.0 g of silver is 10.5 g/cm^3. What's the density of 95.5 g of silver?
Answer:
10.5g/cm³
Explanation:
Since the density of the silver is 10.5g/cm³, any pure sample of silver will have the same value as the density of silver.
Density is the mass per unit volume of a substance.
It is an intrinsic property of matter and does not depend on the amount of matter it contains. Every unique sample of an element or substance will have the same density no matter how big or small they are. So, despite an increase in mass for the given substance, the density will still be the same.Write the Electron Configuration of an atom with 10 electrons:
Explanation:
Neon is the tenth element with a total of 10 electrons. ... Therefore the Ne electron configuration will be 1s22s22p6. Because the second energy level (2s22p6) has eight electrons Neon has an octet and has a full outer shell. It is therefore a Nobel Gas.
How are weathering and erosion the same?
a
Both move sediment from one place to another.
b
Both break down rocks into smaller pieces.
c
Both change Earth's surface.
d
Both leave sediment in new places
Sort the vocabulary word below. Make sure you have come to live session or watched the 5.03 recording. These words will be important to know for the rest of this unit.
Question 1 options:
This is a flow of electrons (such as the flow of electrons in a wire to light up a lamp).
These stop the electricity from flowing (think rubber and glass).
This is slowing the flow of electrons (the current) and where some of the electrons' energy gets converted into heat.
These allow electricity to flow easily through them (think copper and aluminum).
1.
Electric Current
2.
Resistance
3.
Conductor
4.
Insulator
(Sorry it's such a long question!)
Answer:
Electric Current
This is a flow of electrons (such as the flow of electrons in a wire to light up a lamp).
Insulator
These stop the electricity from flowing (think rubber and glass).
Resistance
This is slowing the flow of electrons (the current) and where some of the electrons' energy gets converted into heat.
Conductor
These allow electricity to flow easily through them (think copper and aluminum).
nobody answers anymore but it's worth a shot, i will give branliest tho.
1. when Sodium reacts violently with water is it a physical or chemical change?
2. Ethanol is clear, is that a physical or chemical change?
A cheetah is faster than a cougar, which has greater momentum if the big cats are the same mass
Answer:
cougar.
explanation:
which is has a greater momentum a cheetah with a mass of about 74 kg and a running speed of up to 31 m/s. the cougar's top running speed ranges between 40 to 50 mph (64 to 80 km/h)
Precise measurements are highly reproducible, even if the
measurements are not near the correct value.
TRUE
FALSE
True because you can be precise with the same measurements but they can be not the correct area so
it should be TRUE
0.817 grams of an unknown gas occupies 1.25 L at 27.0 C and a pressure of 765
mm Hg. Is the gas most likely methane (CH 4 ), ethane (C 2 H 6 ), propane or butane?
Show work to support your answer.
The gas is most likely methane (CH₄)
Further explanationIn general, the gas equation can be written
[tex]\large{\boxed{\bold{PV=nRT}}}[/tex]
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08205 l.atm / mol K
T = temperature, Kelvin
[tex]\tt PV=\dfrac{mass}{M}RT\\\\M=\dfrac{mRT}{PV}=\dfrac{0.817\times 0.082\times 300}{1,00658\times 1.25}=15.97\approx=16[/tex]
So the gas is most likely methane (CH₄ )
Which element is in the noble gas family? A. Iodine (I)
B. Nitrogen (N)
C. Radon (Rn)
D. Oxygen (O)
Answer:
Radon
Explanation:
:
Answer:
c. Radon (Rn)
Explanation:
hope this can help
30.5 g of sodium metal reacts with chlorine gas to produce sodium chloride. How much (in grams) chlorine gas must react with this amount of sodium
Answer:
Mass of chlorine = 47.22 g
Explanation:
Given data:
Mass of sodium = 30.5 g
Mass of chlorine= ?
Solution:
Chemical equation:
2Na + Cl₂ → 2NaCl
Number of moles of Na:
Number of moles = mass/molar mass
Number of moles = 30.5g/ 23 g/mol
Number of moles = 1.33 mol
Now we will compare the moles of Cl ₂ with Na from balance chemical equation.
Na : Cl ₂
2 : 1
1.33 : 1/2×1.33 = 0.665 mol
Mass of chlorine gas:
Mass = number of moles × molar mass
Mass = 0.665 mol × 71 g/mol
Mass = 47.22 g
What is the male sex cell that results from meiosis?
Answer: B) Sperm
Explanation: For lazy gang wya Lol
13. How many moles of sodium hydroxide are needed to neutralize 50grams of sulfuric acid?
2NaOH H2SO4 → Na2SO4 + 2H2O
Answer:
1.02mole
Explanation:
The reaction equation is given as:
2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O
Given:
Mass of H₂SO₄ = 50g
Unknown:
Number of moles of NaOH = ?
Solution:
To solve this problem, we first find the number of moles of the acid given;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of H₂SO₄ = 2(1) + 32 + 4(16) = 98g/mol
Now;
Number of moles = [tex]\frac{50}{98}[/tex] = 0.51mole
From the balanced reaction equation:
1 mole of H₂SO₄ will be neutralized by 2 mole of NaOH
0.51 mole of H₂SO₄ will be neutralized by 2 x 0.51 = 1.02mole of NaOH
can someone please help me out with this ? very much would appreciate the help!
Answer:
one is more dense
Explanation:
density = mass/volume
What is the value of delta Hrxn for this equation:
NH3(g)+2O2(g)⟶HNO3(g)+H2O(g)
Based on the molar bond enthalpies:
N−H 390
O−O 142
O=O 502
O−H. 464
N−O 201
Answer:
The ΔHrxn for the above equation = 179 kJ/mol
Explanation:
The reaction bond enthalpies are for the reactant;
3 × N-H = 3 × 390 = 1,170 kJ/mol
2 × O=O = 2 × 502 = 1004 kJ/mol
The reaction bond enthalpies are for the product;
3 × N-O = 3 × 201 = 603 kJ/mol
3 × O-H = 3 × 464 = 1,392 kJ/mol
The ΔHrxn for the above equation is therefore;
ΔHrxn = 1,170 + 1,004 - (603 + 1,392) = 179 kJ/mol
The value of [tex]\rm \Delta H_r_x_n[/tex] of the reaction can be 179 kJ/mol.
[tex]\rm \Delta H_r_x_n[/tex] of the reaction can be given by the change in the energy for the bond formation and the energy for the dissociation of the bonds.
The energy for the dissociation of bonds are :
3 N-H bonds = 3 [tex]\times[/tex] 390
3 N-H bonds = 1170 kJ/mol
2 O-O bonds = 2 [tex]\times[/tex] 142
2 O-O bonds = 1004 kJ/ mol.
The total energy for the dissociation of bonds = 1170 + 1004 kJ/mol
The total energy for the dissociation of bonds = 2174 kJ/mol
The energy for the formation of bonds are :
3 N-O bonds = 3 [tex]\times[/tex] 201
3 N-O bonds = 603 kJ/mol
3 O-H bonds = 3 [tex]\times[/tex] 464
3 O-H bonds = 1392 kJ/mol
The total energy for the formation of bonds = 603 + 1392
The total energy for the formation of bonds = 1995 kJ/mol
[tex]\rm \Delta H_r_x_n[/tex] of the reaction = energy for the dissociation of bonds - energy for the formation of bonds
[tex]\rm \Delta H_r_x_n[/tex] of the reaction = 2174 - 1995 kJ/mol
[tex]\rm \Delta H_r_x_n[/tex] of the reaction = 179 kJ/mol.
The value of [tex]\rm \Delta H_r_x_n[/tex] of the reaction can be 179 kJ/mol.
For more information about the [tex]\rm \Delta H_r_x_n[/tex] of the reaction. refer to the link:
https://brainly.com/question/23081977
The bottom number on the periodic table is called?
Answer:
Atomic mass
Explanation:
Atomic mass ===>Mole weight ....the weight in grams of one mole of the element
Which of the following statements is true concerning what happens when cold milk is poured into hot coffee?
The cold milk transfers its cold to the coffee, cooling the coffee down.
The cold milk transfers its heat to the coffee, warming the coffee up.
The warm coffee absorbs the cold from the milk, cooling the coffee down.
The warm coffee transfers its heat to the milk, cooling the coffee down.
Answer:
The cold milk transfers its cold to the coffee, cooling the coffee down.
Hope This Helps!
Answer:
The cold milk transfers its cold to the coffee, cooling the coffee down.
Explanation:
How many miles of sodium chloride are produced when 2.9 grams of sodium iodide reacts? __ mol NaCl
2 Nal(s) + Cl2(g) = 2 NaCl(s) + l2(g)
**Report your answer to the correct number of significant digits!
Answer: I am trying 0.88 if it is correct then I will edit this to say that!
Explanation:
Water dissolves salt by the process of __ breaking down salt into ions forming a(n) __ solution which conducts electricity.
A. ionization, electrolyte
B. ionization, nonelectrolyte
C. dissociation, electrolyte
D. dissociation, nonelectrolyte
Answer:
b
Explanation:
B.................................................................
Vinegar, CH3COOH can be used to remove limescale deposits.
Describe how vinegar can remove limescale deposits with the aid of a
balanced equation.
The reaction between acids in acetic acid in vinegar reacts with bases of calcium carbonate to form calcium acetate salts
Further explanationCalcium can form deposits on the surface of equipment in contact with water in the form of CaCO₃
vinegar which contains acetic acid can break the bonds between Calcium and Carbonate that form calcium acetate
CaCO₃ + 2CH₃COOH = Ca(CH₃COO)₂ + H₂CO₃
CaCO₃ + 2CH₃COOH = Ca(CH₃COO)₂ + H₂O + CO₂
solid particles deposit at the base of a vessel why?
Answer: solid particles deposit at the base of the vessel because they are heavy compared to the liquid particles.
Explanation:
The chart shows the time, initial velocity, and final velocity of three riders.
A 4-column table with 3 rows. The first row labeled rider has entries Gabriella, Franklin, Kendall. The second row labeled time with entries 10 seconds, 8.5 seconds, 6 seconds. The third column labeled initial velocity has entries 55, 50, 53.2. The fourth column labeled final velocity has entries 32, 50, 67.
Which best describes the riders' final velocities ?
Gabriella is speeding up at the same rate that Kendall is slowing down, and Franklin is not accelerating.
Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating.
Gabriella and Franklin are both slowing down, and Kendall is accelerating.
Gabriella is slowing down, and Kendall and Franklin are accelerating.
Answer:
Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating.
Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating. Hence option B is correct.
What is acceleration?Acceleration is defined as the speed at which an object's velocity changes over time. The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is accelerating. Acceleration can be expressed as
Acceleration = Displacement / Time
Velocity is defined as the pace at which an item changes position while moving in one direction, as seen from a certain point of view and as measured by a specific unit of time. Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path.
Thus, Gabriella is slowing down at the same rate that Kendall is speeding up, and Franklin is not accelerating. Hence option B is correct.
To learn more about acceleration, refer to the link below:
https://brainly.com/question/12550364
#SPJ6
The gene for brown eyes is dominant. What is needed in order for a person to have brown eyes?
11. Apply Concepts You weigh a spoonful of baking soda and 10 mL of vinegar. Then you mix them together. You see that there is quite a bit of fizzing. You weigh the products after the reaction and find there is mass missing. Does the loss of mass disprove the law of conservation of mass? If not, how could you prove it? Please help I have to turn this in before midnight on canvas before its locked.
Answer:
The loss of mass does not disprove the law of conservation of mass because the evaporated fizz goes into the air. Same with lakes when there is a big body of water, but it slowly starts to look like a smaller body of water. This is because the water evaporates, but the mass is not destroyed it is just being coverted into gas.
Explanation:
Which accurately labels the lysosome?
W
X
Y
Z
Answer:
The correct answer is X.
Explanation:
Lysosomes are heterogeneous structures present in animal cells which are bound by single membranes. They are of varying shape and size and contains hydrolytic enzymes inside it.
Lysosomal membrane has H⁺ ATPase which pumps H⁺ into the membrane through ATP hydrolysis. This pumping of H⁺ makes the internal pH of lysosome acidic.
Lysosome contains many hydrolytic enzymes like protease, lipase, nuclease, therefore, lysosome protects the cell from pathogens by engulfing it and hydrolyze it by its hydrolytic enzymes.
The process by which substance comes from outside cell and broken down through lysosome is called heterophagy.