Answer:
if new knowledge expands and corrects our understanding
Explanation:
However, science is always changing. As new evidence is uncovered, a theory may be revised or replaced by a more useful explanation.
Identify the following ions as cations or anions
Mg=
F=
Zn=
K=
P=
Fe=
O=
If the mass of the products of a chemical reaction was 100 g, what was
the mass of the reactants? Explain. -
Please help me with this! I’ll mark you brainiest if it’s correct.
I do know it’s either A or C
Answer:
the correct answer is A
Explanation:
If a dozen cookies weighs 600 grams, how much does each cookie weigh? *
Answer:
50 grams
Explanation:
WILL MARK BRAINLIEST WConsider two elements. Element A has a low ionization
energy of 500 kJ/mol and element B has a high ionization
energy of 1050 kJ/mol. Which element is most likely to form
a positive ion? [Select ]
In which block would you most likely find Element A?
Select)
In which block would you most likely find Element B?
[Select]
Answer:
the one with the lower ionization energy is more likely to be positive as it is easier to remove the valence electron that causes the positive charge
element a is likely in the s block as that is a low ionization energy and they get larger as you move up and to the R in the table
and element b is likely in the p block for the same reason
Explanation:
What mass of Cl2 can be produced at STP when 3.3 moles of HCl are reacted with excess MnO2?
What is the electron configuration for iron?
Answer:
1s2 2s2 2p6 3s2 3p6 4s2 3d6
Explanation:
help on this too please!!
What's the correct answer?
Answer:
smoother and less jagged
Explanation:
When elements bond, what is the part of the atom doing the bonding?
Answer:
the valance electrons
Explanation:
Which has the largest AT ?
A 80°C to 90°C
B) 45°C to 55°C
C 120°C to 130°C
D) 20°C to 30°C
E Its all the same
Answer:
E. They're the same
good luck, i hope this helps :)
Venus is the second planet from the Sun. It takes about 225 days for it to complete one revolution. What would make Venus have a longer revolution?
if Venus rotated slower
if Venus were closer to the Sun
if Venus rotated faster
if Venus were farther away from the Sun
Answer:
if venus were farther away from the sun
Explanation:
it is because far the planet is long the orbit is which make revolution longer
What is true of a Brønsted-Lowry base?
A. A Brønsted-Lowry base accepts H+ ions.
B. A Brønsted-Lowry base donates electrons.
C. A Brønsted-Lowry base donates OHions.
D. A Brønsted-Lowry base accepts OH-ions.
Answer:
I think the answer is A sorry if I am wrong :c
A Brønsted-Lowry base is a species that accepts H⁺ ions (A).
What is Brønsted-Lowry theory?It is an acid-base theory.
Brønsted-Lowry acid: is a species that donates H⁺.Brønsted-Lowry base: is a species that accepts H⁺.What is true of a Brønsted-Lowry base?
A. A Brønsted-Lowry base accepts H⁺ ions. True.
B. A Brønsted-Lowry base donates electrons. False. This is a Lewis base.
C. A Brønsted-Lowry base donates OH⁻ ions. False. This is an Arrhenius base.
D. A Brønsted-Lowry base accepts OH⁻ ions. False. This is not part of any acid-base theory.
A Brønsted-Lowry base is a species that accepts H⁺ ions (A).
Learn more about Brønsted-Lowry acid and bases here: https://brainly.com/question/7256753
PLS HELP i will give 10 points
In Mendeleev’s Periodic Table, why was there no mention of Noble gases like Helium, Neon and Argon?
Answer:Answer choices are:
A. These elements did not fit in with his pattern.
B. These elements are gases and he didn't include gases.
C. The atoms of these elements had no atomic mass.
D. These elements had not yet been discovered.
___________________________________________________________
Correct answer choice is:
D. These elements had not yet been discovered.
PLS HELP ME
1)Which elements are involved in Metallic bonding? ____________
2)How do valence electrons behave in Metallic bonding?_________
3)Provide examples of Metallic bonding in your daily lives. _______
Answer:
1.) Metals are the only substances that use metallic bonds among their atoms. While many elements are commonly known as metals, including iron, aluminum, gold, silver and nickel, metals include a variety of other elements as well. 2.) In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.
Explanation:
3.) Metallic bonding is utilized for its conductive properties to help transfer electricity throughout a house via copper wiring.
about how many days from a full moon, a 3rd quarter moon?
A. 1
B. 7
C. 15
D. 30
Which layer over time due to chemical and physical weathering leads to the other layers?
Answer:
chemical weathering occurs on the surface of minerals, the water and acids that control chemical weathering require access to the surface. Physical weathering breaks the rock to provide that surface
1. Which has the greater blue or indigo light?
Answer:
Indigo wavelength is between
420
and
450
nm.
Blue wavelength is between
450
and
495
nm.
So blue has a greater
λ
than indigo.
Explanation:
Answer:
Indigo has greater frequency.
Have a great day!
What is the mass of a boy that weighs 270 N?|
The mass of boy weighing 270 N has been 27.55 kg.
The mass of the object has been determining the quantity of the matter, while weight of the object has been the mass with the gravitational pull.
The weight of the object has been given as:
Weight = mass × gravitational constant
Weight of boy = 270 N
Gravitational constant = 9.8
The mass of boy is:
270 = mass × 9.8
[tex]\rm Mass\;=\;\dfrac{270}{9.8}[/tex]
Mass = 27.55 kg.
The mass of boy weighing 270 N has been 27.55 kg.
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What is a mixture called when it has its different components mixed unevenly within the substance?
Heterogeneous mixture
Homogeneous mixture
Impure mixture
Pure mixture
Answer:
When 2 or more pure substances are mixed together they form a mixture. If the mixture has its different components mixed evenly within the substance it is a homogeneous mixture. Whereas if the mixture has its different components mixed unevenly within the substance it is a heterogeneous mixture
How many total electrons are transferred in the redox reaction?
Al (s) + Cr(NO3)2 (aq) – Cr (s) + Al(NO3)3 (aq)
A. 2
B. 3
C. 5
D. 6
Answer:
Option D.
Explanation:
Let's balance the hole reaction by the ion electron method.
Al (s) + Cr(NO₃)₂ (aq) – Cr (s) + Al(NO₃)₃ (aq)
We know that oxidation state at ground state is 0.
We determine the half reactions:
Al ⇆ Al³⁺ + 3e⁻
Aluminum increase the oxidation state. This is the oxidation.
Cr²⁺ + 2e⁻ ⇄ Cr
Chromium decrease the oxidation state. It changed from +2 to 0.
This is the reduction. In order to balance the half reactions, we need to multiply by 2 and by 3. In that way, we can cancel the electrons:
(Al ⇆ Al³⁺ + 3e⁻) . 2
(Cr²⁺ + 2e⁻ ⇄ Cr) . 3
We sum the half reactions:
2 Al + 3 Cr²⁺ + 6e⁻ ⇄ 2Al³⁺ + 6e⁻ + 3Cr
We cancel the electrons, so now the balanced reaction is:
2Al + 3Cr(NO₃)₂ → 3Cr + 2Al(NO₃)₃
Final answer: 6 electrons are transferred in the redox reaction.
Magnetite
Chalcopyrite
Siderite
Heamatite
Which of the following ore doesn't contain iron?
Answer:
Chalcopyrite
Explanation:
Pure magnetite contains 72.4 percent iron, hematite 69.9 percent, limonite 59.8 percent, and siderite 48.2 percent,
Which statement best explains why chlorine is added to drinking water?
A. Chlorine protects people's teeth against cavities.
B. Chlorine cures infections caused by bacteria or other
microorganisms.
C. Chlorine prepares the body to fight future infections.
D. Chlorine kills most pathogens in water.
SUBMIT
help
Explanation:
D) chlorine kills most pathogens in water.
How many atoms of oxygen are in 1.5 moles in H2SO4?
Answer:
In the given formula, there is 1 carbon atom and there are 2 oxygen atoms. So, in total there are 3 atoms.
Explanation:
What is the molar mass of NaCrO4?
Answer:
Molar Mass: 138.9818 g/mol
Explanation:
1. How many moles in 3.56 x 10^25 molecules of CH3F.
Answer:
Not sure
Explanation:
What holds all the planets and objects in the solar system in place?
Where does it come from?
Answer:
Gravity
Explanation:
i dont rlly know where it comes from...
Fossils can be body parts of ancient organisms, or they can be traces. Give five examples of traces. Help this is due today!!!!!7 grade
Burrows, tracks, coprolites, nests and footprints are examples of traces that can be found in a fossil.
The amplitude of a wave is the distance between a point on one wave and the identical point on the next wave T or F?
It is false that the amplitude of a wave is the distance between a point on one wave and the identical point on the next wave.
What is amplitude?The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position, as defined in physics. It is one-half of the length of the vibration path.
The energy of the disturbance that causes the wave determines the amplitude of the wave. The amplitude of a wave caused by a more energetic disturbance is greater.
A wave's amplitude is the distance from the center line to the top of a crest or the bottom of a trough.
The amplitude of a wave is the height of the wave measured from its highest point to its lowest point. The length of a wave from one peak to the next is referred to as its wavelength.
Thus, the given statement is false, as the definition is of wavelength and not of amplitude.
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Help ASAP I will mark brainliest for the correct answer !!!⚡️
Answer:
motion
Explanation: