Answer:
Given - acc = 4 m/ s^2
Force = 255 N
To find = mass
Solution -
Using the formula,
[tex]f = m \times a[/tex]
255 = Mass × 4
255 /4 = Mass
63.75 = Mass
1 N = kg m/s^2
63.75 kg = Mass
Hydrochloric acid is stronger than carbonic acid.
True or False?
6. This particle has no charge
protons
neutrons
electrons
Answer: Neutrons
Explanation: This particle has no charge
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Answer:
A
Explanation:
divide the time value by 3600
What is the net charge on an ion that has 9 protons, 11 neutrons, and 10 electrons?
A) 2+
B) 1-
C) 1+
D) 2-
Answer:
The net charge on the ion is negative 1(-1)
Explanation:
Negative 1(-1)
The group I element are very active.Why?
Answer:
Alkali metals
Explanation:
The elements in the alkali metal group have high chemical reactivity, reacting strongly with ametallic elements and several other compounds. They are also easily oxidized and cannot be found free in nature.
NH3
O ammonium
O ammonia
O nitrogen dihydride
Ca(OH)2
O calcium dihydroxide
O calcium hydrogen oxide
O calcium hydroxide
Answer:
First one is: ammonia
Second one is: calcium hydroxide
Explanation:
Answer:
1:ammonia
2: calcium hydroxide
Explanation:
Which of the following represents a decomposition reaction?
Answer:
i need a picture to help!
Explanation:
In the chemical formula for aluminum oxide, what would be the subscript for aluminum?
Group of answer choices
A. 2
B. 3
C. -2
D. -3
what do you think life on earth would be like if chemistry had not been put to practical use?
Answer:
if chemistry hadn't been put up to practical use, we wouldn't truly understand the reason why humans are humans like makes up humans (including other understandings of biology, etc) and we wouldn't be able to have the advancements we have today (vaccines, etc).
Explanation:
Life on earth would have remained primitive if chemistry had not not been put to practical use.
Chemistry is the study of the nature, composition and properties of matter as well as the changes that matter undergoes. Chemistry is a central science because it cuts across all other scientific disciplines.
Chemistry, from earliest times have been a significant driving force in our journey towards civilization. The early alchemists produced coins, tools for farming and warfare as well as drugs.
These early advances in chemistry have given way to the complexities of modern innovations in chemistry from synthesis of materials for various applications to synthesis of enzymes, drugs and hormones that supplement natural sources.
All of these have made life on earth far more comfortable than it would have been if chemistry had not been put to practical use.
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If you drain a solution, will the molarity change, if so, will it increase or decrease?
Express the following number
in scientific notation with 3
significant figures:
450,000
[?] x 100
this large group of elements contains many metals which are not highly reactive such as copper,iron, and tungsten
Answer: Hello sir, hope you are having a good day, I have came to tell you your answer needs a picture so we can answer it or otherwise we will be wrong
Explanation:
A large group of chemical elements that contains many metals which are not highly reactive such as copper, iron, and tungsten is called: Transition metals.
Transition metals can be defined as a chemical element that has a partially filled d-orbital or is capable of producing cations with an incomplete d-orbital (subshell).
Hence, a transition metal refers to a large group of chemical elements that are found in the d-block of the periodic table such as Group III to Group XII elements.
In Chemistry, some examples of transition metals include the following:
Copper.Iron.Tungsten.Cobalt.Zinc.Nickel.In conclusion, transition metals comprises of many metals which are not highly reactive such as tungsten, iron and copper.
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What is the hybridization and shape for an XeF6 2+ molecule?
Answer:
Explained below
Explanation:
An XeF2+ molecule has a linear shape structure with hybridization of sp³d of it's central Xe atom alongside 3 lone pairs of electrons with two bond pairs of electrons.
Meanwhile, XeF6 is different as it possesses a distorted pentagonal bipyramidal shape structure with hybridization of sp³d³ of its central Xe atom with 1 lone pair of electrons alongside 6 bond pairs of electrons.
WHICH PROPERTIES OF A SOLID ARE SHARED WITH LIQUID BUT NOT WITH GAS
ANSWER QUICKLY
Answer:
Both solids and liquids have a definite volume
Explanation:
There are three states of matter which are; solids, liquids and gases.
All three states of matter have unique peculiarities. The solids have a definite shape and volume because of very strong intermoleclar forces in operation in the system.
Liquids also have a definite volume, but do not have a definite shape. They take the container's shape. However, there are less intermolecular interaction in the liquid states.
It is common to assume that gas particles do not interact. A gas does not have definite shape and volume and the weakest magnitude of intermolecuar interference.
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Answer:
The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them. Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other.
Explanation:
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Pls answer this one thanks have a great day!!! :)))
A. A neap tide
B. A lunar eclipse
C. A spring tide
D. A solar eclipse
Please help!!! I’ll give brainlist
Answer:
the answer will be neap tide
if H2SO4 contacts the skin, it is cleaned fast with a dry cloth and then rinsed with:
A) H20+vinegar
B) H2O+baking soda
C) H2O+table salt
Answer:
(B) H2O + Baking soda
Explanation:
H2SO4 is commonly known as Sulfuric acid. It is a strong acid which can cause severe damage to body parts when comes in contact. If H2SO4 contacts the skin then it will be quite irritating for the skin so its better to apply water (H2O) with Baking soda.
Baking soda is of alkaline nature when it will react with H2SO4 it will undergo neutralization and the effect of the strong acid H2SO4 will be minimized.
The chemical reaction between baking soda and H2SO4 is
H2SO4(aq) + 2NaHCO3(aq) → Na2SO4(aq) + 2CO2(g) + 2H2O(l)
Therefore the reaction is known as neutralization reaction. This aqueous baking soda reacting with Sulfuric acid neutralizes its effect and minimize its effect on the skin.
In comparison to boron, beryllium has greater nuclear charge or lesser
Explanation:
Beryllium contains 4 electrons throughout the s1 s2 nuclei, which are completely loaded and both atoms are combined, as opposed to boron. Therefore, when all electrodes are coupled and orbitals are loaded down, it would have less nuclear charge and also have greater ionization.
What happens when air masses collide?
Answer:
When two air masses collide they do not mix, instead they push against each other. If a cold air mass and a warm air mass meet then the warm air rises because it is lighter then cold air.The boundary where two air masses meet is called a front.
Explanation:
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The greater the mass of an object
(a) the easier the object starts moving
(b) the more balanced it is
(c) the greater its inertia.
(d) the more space it takes up
Answer:
C. The greater it’s inertia
Explanation:
which statement describes effusion
Answer:
It occurs when a gas passes through a tiny hole.
Answer:
Effusion is a term used to describe when a gaseous molecule in a container passes or escapes through a tiny/small hole. Effusion and diffusion are two properties of gases that are often used interchangeably, however, they differ.
Explanation:
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Give three examples of unbalanced forces in your everyday life.
Answer:
weight force (i.e. the weight of something)
the force of a bat on the ball.
the force of the hair brush on hair when it is being brushed.
the force of your foot pushing on the pedal when you ride your bike.
Explanation:
What percentage of a radioactive isotope remains after 4 half-lives?
Answer:
66.7%
Explanation:
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Zinc metal reacts with hydrochloric acid to produce zinc chloride and hydrogen gas as seen in the chemical equations below:
Zn(s) + 2HCl(aq) === ZnCl2(aq) + H2(g)
What type of equation is described above?
F. Double Replacement
G. Single Replacement
H. Decomposition
J. Synthesis
Answer:
Single Replacement.
Explanation:
I’m confused how to do this
Answer:
B. P (Phosphorus)
Explanation:
The element is be phosphorus.
This is true because phosphorus has a larger atomic radius than carbon. If you move than the group, elements gain additional electron shell. That additional electron shell keeps electrons far from the nucleus of the atom. This actually increases the atomic radius. Also, phosphorus is more electronegative than aluminum because phosphorus itself is a non-metal and non-metals are generally electronegative while aluminum is a metal and electropositive.
Phosphorus has a lower ionization energy than argon because the ionization energy across the period (i.e from left to right) increases and across period 3, you will find phosphorus first before argon in the periodic table.
describe how asteroids comets meteors move around the solar system
Answer:
Flow freely
Explanation:
Na2CO3 → Na2O + CO2
Balance
Answer: Na2CO3 → Na2O + CO2 is already balanced
Explanation:
See answer.
23. A satellite moving at the same velocity in space is an example of which
law?
a. Ist
b. 2nd
C. 3rd
Answer:
A. LST
Explanation:
• 1st Law: The path of each planet around the Sun is an ellipse with the Sun at one focus.
• 2nd Law: The line from the Sun to any planet sweeps out equal areas of space in equal time intervals.
• 3rd Law: The square of the orbital period of a planet is directly proportional to the cube of the average distance
Which would have the greatest attractive force between particles?.
A)Water at 200 degrees
B)Oxygen at 54 degrees
C)Neon at 162 dgrees
D)Hydrogen at 323 degrees
I said the answer is b
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