Answers
Answer:
the answer is c I believe
Related Questions
Use your knowledge of atoms, bonding, and the periodic table to complete the chemical equation .”CH4 + O2
and predict the products of the chemical reaction on your paper. Label this equation “Initial Prediction.
Answers
Answer:
CH4 + O2 = CO2 + H2O.
Answer:
CH4 + O2 = CO2 + H2O.
Explanation:
Can somebody just name all the metalloids, gases, and liquids that are on the periodic table. please this is due in a hour!!!
Answers
Answer:
There are six liquid elements present in the periodic table. They are bromine,mercury ,caesium,gallium,rubidium and francium.
The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.
The gaseous element group; hydrogen (H), nitogen (N), oxygen (O), fluorine (F), chlorine (Cl) and noble gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn) are gases at standard temperature and pressure (STP).
Explanation:
Atoms of which of the following elements have the most similar chemical
properties as cadmium (Cd) atoms?
A Zinc (Zn)
B Gold (Au)
C Copper (Cu)
D Silver (Ag
free brainlist
Answers
Explanation:
Zinc and Cadmium are in the same group. Elements in the same group have similar characteristics and properties. Hope this helps!
Answer: the answer is A. Zinc (ZN)
Explanation: jus did a quiz with this quest thx for da points good luck :D
Beth has two unlabeled balloons, one filled with hydrogen gas and the second filled with neon gas. She researches and writes down the density of hydrogen and neon. Beth also has several chambers filled with various gases and a poster showing the densities of these gases. She has no other materials or tools available to her to help her identify the element in each balloon.The poster and Beth’s data are shown.
Answers
Which of the following is an example of kinetic energy?
O B. a stretched rubber band
O C. a piece of coal
O A. a battery
O D. a rolling ball
Answers
Correct me if I’m wrong
Ethanol, C2H5OH, reacts with phosphorus trichloride, PC13:
3C2H5OH(aq) + PC13(aq) - 3C2H5C1 (g) + H3PO3(aq)
Which is the actual mass of chloroethane, C2H5CI, produced if 138.0 g of ethanol is
consumed in excess phosphorus trichloride? The percentage yield for this reaction is
93.00 %.
Answers
Answer:
no
Explanation:
no
THIS IS SCIENCE
PLEASE HELP
Answers
Answer:
An unbalanced force? .
Pls give me feedback if thats not right.
MgSO4 x 7H2O:
How
many molecules of
water are present
per magnesium
sulphate formulation
unit
Answers
Answer:In regards to writing the formula, we know that magnesium has a charge of 1+ and sulfate, SO4, has a charge of 1-. Sulfate is a polyatomic ion so the charge of the whole thing is (SO4)1-. When you combine them you end up with MgSO4 and the "heptahydrate" is seven water molecules.
Explanation:
Answer:
Iduno sorry po hsjsnaka
If you're wearing a yellow shirt in magenta light, what colour does the shirt look like now?
Answers
Present in a state where it molecules are far apart during a change of state it's molecules slow down which change of state has most likely taken place from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma
Answers
Answer:
The change of state that has occurred is from a gas to a liquid
Note: The question is incomplete. The complete question is given blow.
H₂O is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?
from a gas to a liquid
from a liquid to a gas
from a solid to a liquid
from a gas to a plasma
Explanation:
Water can exists in three states: as gaseous water vapor, as liquid water, and as solid ice. Each of these states of water can be interconverted from one to another by the addition or removal of heat in a process known as change of state.
Liquid water can be converted to solid ice by the removal of heat, while solid ice ice can be converted to liquid water by the addition of heat. Also, liquid water can be converted to water vapor by the addition of heat, while water vapor can be converted to liquid water by the removal of heat.
Of the three states of water, the one in which the molecules are farthest apart is in the gaseous state. The molecules have high kinetic energy and move randomly while colliding with one another. When a heat is removed from these highly energetic molecules, the molecules slow down and lose some of their kinetic energy and a change of occurs from gaseous to liquid state.
Therefore, the change of state that occurred as described, is from gas to liquid.
Suppose Rutherford's lab was 10 meters (m) long and the speed of an alpha particle is 3.0x10^8 meters per second (m/s). How much time would he plan on the alpha particles taking to move from the alpha particle source to the gold foil target? Write it in a mathematical equation
Answers
Answer:
t = d/v , 33.3 ns
Explanation:
Since distance, d = vt where v = speed and t = time taken to cover the distance.
Since the distance, d covered by the alpha particle is the length of Rutherford's lab which is 10 m long and the speed of the alpha particle is v = 3 × 10⁸ m/s, the time, t it takes the alpha particle to move from the alpha particle source to the gold foil target is thus
t = d/v
= 10 m/3 × 10⁸ m/s
= 10/3 × 10⁻⁸ s
= 3.33 × 10⁻⁸ s
= 33.3 × 10⁻⁹ s
= 33.3 ns
How is a scientific law different from other laws in society?
A. A scientific law serves to protect people, property, and nature from
harm.
OB. A scientific law describes what always happens under specific
conditions in nature.
C. A scientific law is a rule about how to treat and punish people.
D. A scientific law is what scientists have decided should be forced
to happen in nature.
Answers
Answer:
B. A scientific law describes what always happens under specific
conditions in nature.
Explanation:
Scientific law is something that has been proven over and over and therefore is always correct under conditions in nature.
Answer:
B. A scientific law describes what always happens under specific
conditions in nature.
Explanation:
Scientific law is based on observation and experiments to support a claim. It usually describes nature.
Using standard formation enthalpies, calculate the standard reaction enthalpy for this reaction. 6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g) ANSWER: kJ/mol
Answers
Answer:
2802.5 KJ/mol
Explanation:
Calculate standard enthalpy of the Reaction :
6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g)
using standard formation enthalpies . hence the standard enthalpy of the reaction = 2802.5 KJ/mol
attached below is the detailed solution
Select the correct answer.
An Iron bar at 200°C Is placed in thermal contact with an Identical Iron bar at 120°C In an Isolated system. After 30 minutes, both Iron bars are at
160°C. If the Iron bars were placed in thermal contact in an open system Instead of an Isolated systemn, how would the results be different?
Assume that the room temperature Is 25°C.
The temperatures of the Iron bars after 30 minutes would be less than 160°C because heat would be lost to the surroundings.
O B. It would take more than 30 minutes for both Iron bars to reach 60°C because heat would be transferred less efficiently.
O c
The temperatures of both Iron bars would Increase as they absorb heat from the surroundings.
O D. The temperatures of both Iron bars would decrease because pleces of them would be ost to the surroundings.
Answers
Answer:of
Explanation:
PLEASE HELP ILL MARK BRAINLIEST
Answers
Answer:
1. true
2. existing matter
3. the materials simply turn into gases you cannot see
hope that helps! ☺
plz mark Brainliest!
Does a animal cell have cytolysis?
Answers
Answer:
The presence of a cell wall prevents the membrane from bursting,so cytolysis only occurs in animal and protozoa cells which do not have cell walls.
Explanation:
what is a metal that forms two types of oxides and rusts in moisture
Answers
Answer:
An example of a metal that rusts is Iron
Answer:
Iron
Explanation:
The metal that forms 2 types in moisture is iron.
ill give brainlist pls help me and don't guess I want full explanation please.
Answers
Answer:
C. 3
Explanation:
volume = length×width×height
3×3×3=27
Many ski resorts and mountain cities can be reached directly by planes which deposit travelers a mile or more above sea level. This can result in altitude sickness due to hypoxemia, or reduced oxygen in the blood, caused by the unaccustomed exposure to the lower atmospheric pressure at high elevations. On a given day, the prevailing atmospheric pressure in Albuquerque, NM (elevation 1620 meters) might be 0.799 atm. Calculate this pressure expressed in mmHg and in torr. Relationship between altitude and barometric pressure.
Answers
Answer:
See explanation
Explanation:
To convert from atm to mmHg
1 atm = 760 mmHg
0.799 atm = 0.799 atm * 760 mmHg/1 atm = 607.24 mmHg
To convert from atm to torr
1 atm = 760 torr
0.799 atm = 0.799 atm * 760 torr/1 atm = 607.24 torr
Briefly describe each of the suns layers. I’ll give brainless
Answers
Answer: The inner layers are the Core, Radiative Zone and Convection Zone.
The outer layers are the Photosphere, the Chromosphere, the Transition Region and the Corona.
Nuclear fusion of hydrogen in the core of the Sun produces tremendous amounts of energy that radiate out from the Sun.
The corona is the outermost layer of the Sun, starting at about 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the corona is 500,000 K (900,000 degrees F, 500,000 degrees C) or more.
The chromosphere is a layer in the Sun between about 250 miles (400 km) and 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the chromosphere varies between about 4000 K at the bottom (the so-called temperature minimum) and 8000 K at the top (6700 and 14,000 degrees F, 3700 and 7700 degrees C), so in this layer (and higher layers) it actually gets hotter if you go further away from the Sun, unlike in the lower layers, where it gets hotter if you go closer to the center of the Sun.
The photosphere is the deepest layer of the Sun that we can observe directly. It reaches from the surface visible at the center of the solar disk to about 250 miles (400 km) above that. The temperature in the photosphere varies between about 6500 K at the bottom and 4000 K at the top (11,000 and 6700 degrees F, 6200 and 3700 degrees C)
(phew! There you go!)
Which is the correct complete ionic equation for the reaction of
2HCl(aq) + Zn(s) + H2(g) + ZnCl2(aq)?
a) H+(aq) + CI-(aq) + Zn(s) →
H2(g) + Zn2+(aq) + Cl-(aq)
b) 2H+(aq) + 2C1-(aq) + Zn(s) → H2(g) + Zn2+(aq) + 2Cl-(aq)
c) H+(aq) + Zn(s) → H2(g) + Zn2+(aq)
d) 2H+(aq) + Zn(s) → H2(g) + Zn2+(aq)
Answers
Answer:
b) 2H+(aq) + 2C1-(aq) + Zn(s) → H2(g) + Zn2+(aq) + 2Cl-(aq)
Explanation:
The equation is given as;
2HCl(aq) + Zn(s) + H2(g) + ZnCl2(aq)
In writing an ionic equation, only the aqueous compounds dissociates into ions. This means HCl and ZnCl2 would dissociate to form ions.
This is given as;
2H+ + 2Cl- + Zn(s) --> H2(g) + Zn2+ + 2Cl-
The correct option is;
b) 2H+(aq) + 2C1-(aq) + Zn(s) → H2(g) + Zn2+(aq) + 2Cl-(aq)
How many grams of magnesium oxide do you have if you have 5.31 x 1024 formula units of magnesium oxide (MgO)?
Answers
Answer: cashier
Explanation: because
An airplane flies with an average speed of 600 km/hr. How much time will it take to travel 1950 km?
Answers
Time = distance ÷ speed
Time = 1950 ÷ 600
Time = 3.25 hours ( 3 hours 15 minutes )
Who's the first person to reach the moon
Answers
Answer: Neil Armstrong
Explanation
On July 20, 1969, Neil Armstrong became the first human to step on the moon. He and Aldrin walked around for three hours. They did experiments. They picked up bits of moon dirt and rocksExplanation:
Answer:
In 1969, Neil Armstrong was the first person to reach the moon.
Explanation:
help please please help help help help help help help help!!!!!!!
how did chlorine atom attain saturation in potassium chloride and oxygen dichloride?
Answers
Answer:
because it was in the mixture
Explanation:
which alkaline earth metal is a component of gypsum
Answers
Answer:
calcium is the correct answer :)
Adaptations ONLY help an organism stay alive when they are physical and NOT when they are behavioral. true or false??
Answers
Answer:
true
Explanation:
i hope it's true, if not, then it's false, if anyone else answered but got it from the link, let me know to report it or you report it
Answer:
False.
Explanation:
Hibernation is an example of a physical adaptation. False.
What is needed to change a phase of matter?
Answers
The addition or subtraction of thermal energy. For example if you heat up an ice cube, it will melt to become water. If you heat it even more, it will evaporate.
Work out the empirical formula of a compound that contains 35% of nitrogen , 5% of hydrogen and 60% of oxygen.
Answers
Answer:
[tex]H_5N_5O_6[/tex]
Explanation:
Hello there!
In this case, for the determination of empirical formulas, it is firstly necessary to assume the given percentages of the constituent atoms as the masses so we can compute their moles in the formula:
[tex]n_N=\frac{35gN}{14.01g/mol} =2.5molN\\\\n_H=\frac{5g}{1.01 g/mol}=5molH\\\\n_O=\frac{60g}{16 g/mol} =3molO[/tex]
Thus, we need to divide the resulting moles, by the fewest ones (those of nitrogen) in order to determine the coefficients in the formula:
[tex]N:\frac{2.5}{2.5}=1\\\\H:\frac{5}{2.5}=2\\\\O:\frac{3}{2.5} =1.2[/tex]
However, we need to turn all these numbers, whole numbers, so we multiply by 5 to get:
[tex]H_5N_5O_6[/tex]
Best regards!
CaC2 + 2H2O ⟶ C2H2 + Ca(OH)2
How many moles of water are needed to produce 56.8g C2H2?
Answers
Amount of moles of water is 4.36 mol
Explanation: M(C2H2) = 2·12.01 + 2·1.008 = 26.036 g/mol
Amount of substance is n= m/M= 56.8 g / 26.036 g/mol= 2.18159 mol
Water is needed 2·2.18 mol = 4.36 mol
