Answer:
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
"some elements have only one stable isotope"
Explanation:
Describe what happens when two bodies of matter at different temperatures are brought together.
Answer:
maybe they will be the same temperature
Explanation:
Answer: The effect of this transfer of energy usually, but not always, is an increase in the temperature of the colder body and a decrease in the temperature of the hotter body.
Explanation:
Which of the following are properties of the oxides of non-
metals?
property 1
property 2
A
acidic
covalent
B.
acidic
ionic
С
basic
covalent
D
basic
ionic
(a)
(b)
(d)
Answer:
it is option A hope it helps
The properties of nonmetallic oxides include acidity and covalent character. Hence, option A is correct.
What are non-metals?Non - metals are elements in the rightmost side of the periodic table. Non -metals are mostly gases and some of them include, metalloids also. Non-metals are commonly electron -deficient and some of them are highly electronegative.
A compound shows covalent character, if the electrons are shared between the constituent atoms. Covalency increases from left to right in periodic table.
As the covalent character increases, acidity increases. Oxides of non-metals are electrophiles and acts as Lewis acids. They are all covalent compounds. Therefore, option A is correct.
Find more on covalent bonding:
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Describe how an electric field is generated.
Answer:
Electric charges produce electric fields
Explanation:
N2 + 3 H2 → 2 NH3
After performing an experiment, you find that when 52.5g
H2 reacts with excess N2, 290g NH3 is formed. What is the
percent yield of this reaction?
a. 90.3%
b. 98.2%
c. 89.1%
d. 102.4%
Answer:
B
Explanation:
PLS HELP DECOD THIS :(
The planet Superman was born on (also has the atomic number 36): (F3) R (C3) P (H1) (I1) N
Answer:
he was born on planet krypton
5) How could you get clean sand from a mixture of sand and little bits of
iron wire?
What are some of the positive and
negative effects of the use of plastics?
Answer:
Positive: Save fuel and reduces greenhouse gas
Negative: Harmful to human and animal health ( underwater animals), Hurts the food chain
Explanation:
I got it from a video. Hopefully it helps you.
Calculate the number of moles in 2.67 g of carbon trihydride
Answer:0.178 moles
Explanation: carbon trihydride seems to be an unusual name for the methyl group CH3–
ionic wt 15
moles = 2.67/15 = 0.178
Which of the following would exert a gravitational force? (check all that apply) *
A. Sun
B. Earth
C. Moon
D. You
E. a marble
F. light
G. air
H. water
Answer: B. C and A.
Explanation:
ammonia gas cannot be collected in an erect gas jar?why?
Answer:
ammonia being lighter than air, is collected by downward displacement of air in an inverted gasjar
The gas jar is used to collect ammonia gas. This gas can be barely dissolved in water. As a result, the downward displacement of water does not gather it in the jar.
What is ammonia ?With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical. Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colorless gas with a strong, pungent odor.
Because it is simpler to install inlets and outlets in one end of an erect gas jar than it is to install them on the side or the bottom, which are required for placement on a stable surface.
Ammonia is prepared in a laboratory by forcing air downward to collect the gas. Due to the high solubility of ammonia in water, it is impossible to collect ammonia gas over water.
Thus, The gas jar is used to collect ammonia gas.
To learn more about ammonia, follow the link;
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(a) Describe how a simple molecular structure differs from a giant molecular structure.
Answer:
Giant structures are usually arranged in to giant regular lattices and they are extremely strong because they have many bonds involved. Simple molecules are just normal molecules as the name suggests like CO². though it contains strong covalent bond it still has weak intermolecular forces
Explanation: when your account gets to deleted and your trying to get your points up lol
What is the main purpose of the nervous system?
A:exchanges gases between the body and the environment
B: gathers information from the environment and body and coordinates actions
C: regulates the body using hormones
D: provides shape and structure for the body
Answer:
B
Explanation:
the nervous system (nerves) is the brains communication to the body
Advertisements for tobacco and alcohol products work because they "tell the truth."
True
False
Which compound is impossible?
A. Zns
B. Na2O
C. Ca3P2
D.LiCl2
A camper pours 500 g of coffee, initially in a pot at 80 oC, into a 110-g aluminum cup initially at 30 oC. What is the final temperature? Assume that coffee has the same specific heat as water and that no heat is exchanged with the surroundings. (cwater=4.18 J/goC). (cAluminum=0.900J/g.C)
The final temperature : t=77.74 °C
Further explanationGiven
500 g coffee, t = 80 °C
110 g aluminum cup, t = 30 °C
Required
The final temperature
Solution
Q in = Q out
Q absorbed = Q released
Q aluminum cup = Q coffee
110 x 0.9 x (t-30)=500 x 4.18 x (80-t)
99t-2970=167200-2090t
2189t=170170
t=77.74 °C
Lead will float in water.
Actually, no. While their mass may be the same (1kg), the volume of lead is a lot smaller than that of feathers. As there is the same mass stuffed in a smaller space, it must be denser. The density of water is 1 g/cm3, so if the density of the lead is more than 1g/cm3, it has to sink
1.25mole Nocl was placed in a2.50l reaction chamber at 427c. After equilibrium was reached .1.10moles of Nocl remained.Calculate the equilibrium constant Kc for the reaction. 2Nocl(g)=2No(g)+cl2(g)
Answer:
Kc → 5.58×10⁻⁴
Explanation:
Equilibrium reaction is:
2NOCl (g) ⇄ 2NO (g) + Cl₂(g)
Initially we have 1.25 moles of NOCl
After the equilibrium, we have 1.10 moles. So, during the process:
(1.25 mol - 1.1 mol) = 0.15 moles have reacted.
As ratio are 2:2, and 2:1, 0.15 moles of NO and (0.15 /2) = 0.075 moles of chlorine, were produced in the equilibrium.
Finally in equilibrium we have: 1.10 moles of NOCl, 0.15 moles of NO and 0.075 moles of Cl₂. But these amount are not molar, so we need molar concentration in order to determine Kc:
1.10 mol /2.50L = 0.44 M
0.15 mol / /2.50L = 0.06 M
0.075 mol /2.50L = 0.03 M
Let's make expression for Kc → [Cl₂] . [NO]² / [NOCl]²
Kc = (0.03 . 0.06²) / 0.44² → 5.58×10⁻⁴
What is matter?
12 points..
Explanation:
matter is a substance that has mass and it takes up space.
hope this helps!!
PLEASE HELP WILL GIVE BRAINLIEST
2 eggs cook in a frying pan, which is sitting over a gas burner.
Is thermal energy being transferred by radiation in this image? Why or why not?
Answer:
No, thermal energy is not being transferred by radiation. The eggs are in direct contact with the metal pan, which is in direct contact with the gas flame, so this is conduction, not radiation. Radiation transfers thermal energy by electromagnetic waves, not by direct contact.
Answer:
no
Explanation:
a metal pan is cooking the eggs because the flame is touching the pan and the molecules are colliding with each other
N4P10
There are ____________ phosphorus atoms
Complete the following reaction :
HC≡CH + HBr→?
hope it helps you .............
13.) Write one paragraph minimum of 6 sentences addressing your concerns or lack of concern about DHMO.
Answer:
I am not sure
Explanation:
ΔABC ~ ΔEFD
how many molecules are in 4K2CO3
Answer: 5 molecules
Explanation:
2 molecules of K and 3 molecules of O
PLEASE HELP! ILL GIVE BRAINLIEST, EXPLAIN YOUR ANSWER PLS
Answer:
arteries carry blood from the heart to the lungs and veins carry blood from the lungs to the heart
Explanation:
Arteries carry oxygenated blood from the heart, while veins carry oxygen-depleted blood back to the heart. ... The pulmonary veins transport oxygenated blood back to the heart from the lungs, while the pulmonary arteries move deoxygenated blood from the heart to the lungs.)
For the reaction H2 + O2→ H2O, how many grams of water are produced from 6.00 mol of hydrogen?
Answer:
108 g
Explanation:
2H₂ + O₂ ⇒ 2H₂O
1) n(H₂) : n(H₂O) = 2 : 2
Hence, n(H₂O) = n(H₂) = 6,00 mol
2) m(H₂O) = n × M = 6,00 mol × (2 + 16) g/mol = 6,00 × 18 mol = 108 g
write formulas and names for two binary ionic compounds
I NEED THIS ASAPP PLEASEE
Answer:
Exothermic
Explanation:
The equation of the reaction is given as;
H₂O(vapour) --> H₂O(liquid)
The equation above represents a condensation process. Water vapour condenses to liquid.
Condensation involves loss of energy as heat. The equation can be modifies as;
H₂O(vapour) --> H₂O(liquid) + Heat
Due to the loss of heat, condensation is regarded mas an exotheric process.
Anybody good at chemistry that is willing to help?? If you could that'd be greatly appreciated!
(25 PTS)
Answer:
The least similar to a real gas found in the environment would be B.
Explanation:
Standard Ambient Temperature/Pressure (SATP) is at 298.15K and 101.3kPa. It describes standard conditions and is often used for measuring gas density and volume using the Ideal Gas Law. The values least similar to theses ones would be the least similar in the gases in the environment.
Two oxides, X and Y, are added separately to dilute sulfuric acid and Giste sesiun toycrolide,
X reacts with dilute sulfuric acid but y does not react,
Y reacts with aqueous sodium hydroxide butx does not reach.
Which type of oxide are X and Y?
Answer:
x basic and y acidic
Explanation:
hope it helps
Which of these equations is balanced, and which is not balanced? Explain how you can tell.
a) 2C2H6+ 7O2 → 4CO2+ 6H2O
b) 2MgCO3 + H2SO4 → 2MgSO4 + H2O + 2CO2
Answer:
a is balanced
Explanation:
a) reactant/ product
(2x2)=4c / 4c
(2x6)=12h / 12 h
14o / (8o+6o)=14 o