Answer:
lone pairs and bonds both repulsive each other
Explanation:
therefore bond angles will be changed that leads to the original geometry in nature
how does the advancement of medical technology increase the number of medical ethical issues that arise?
Answer:
People are getting richer and richer as technology advances, this may make it so that some people are getting treated unfairly. Signs of little money may support the reason that you are not getting the help you need; this means that health problems would arise more, resulting in an unfair lifestyle.
Which sequence is used to separate a soluble salt from a mixture of a soluble and an insoluble
salt?
A
add solvent, heat the mixture, crystallise the mixture
add solvent, heat the mixture, filter, crystallise the filtrate
B
C
heat the mixture, filter, crystallise the filtrate
heat the mixture, filter, add solvent, crystallise the filtrate
D
NO LINKSSSS PLEASE!!!
Which of the following is an example of a gas solution?
Select one:
a. Air in water.
b. Antifreeze in water.
c. Bronze alloy.
d. Helium in air.
d- Helium in air me air is made up of various gases
which statement best describes what occurs during a chemical reaction?
a) the bondsman reactants break so that elements can rearrange down form new products
b)bonds within the nucleus of reactants atoms are broken and rearranged to form new product atoms
c) the bonds and products break so that elements can rearrange and form new reactants
d)reactants atoms are destroyed releasing energy which is used to create new product atoms
Answer:
bonds within the nucleus of reactants atoms are broken and rearranged to form new product atoms
a person dies, and within hours, the skeletal muscles develop a locked contraction known as rigor mortis. calcium ions leak from the sarcoplasmic reticulum into cytoplasm. from your knowledge of cross bridge cycling, what best explains this rigor?
Rigor mortis is the stiffening of the body after death. After death, the body begins to get cold. From about two to six hours after death, the muscles start to stiffen, probably because the actin and myosin filaments of the muscle slide into each other. The rigor mortis starts at the eyelids, jaw and neck and then slowly spreads to all parts of the body within six hours.
Contrary to popular belief, rigor mortis will occur more quickly in high ambient temperatures than in cold conditions. This is because the underlying chemical reaction occurs faster at higher temperatures.
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write the formulas of alkanes that contain three, five, seven, and nine carbon atoms
Answer:
Explanation:
Name Number of Carbon Atoms Molecular Formula
methane 1 CH4
ethane 2 C2H6
propane 3 C3H8
butane 4 C4H10
Which of the following properties is a chemical property?
Answer:
flammability, toxicity, acidity, reactivity are some examples.
sorry you left out your options.
Answer:
Where are the options
Explanation:
Can you be a little more specific about your question?
What type of bond if formed between the atoms of this type of compound
Answer:
The main component are electrons.
A chemical bond is any attractive interaction that keeps atoms short. This interaction can be directional as the bond between two atoms within a molecule, or non-directional as the electrostatic interaction that keeps the ions of an ion crystal in contact. It can be strong like the two previous examples, or weak as van der Waals interactions that are dipolar in nature.
Many models exist to describe these interactions. For example, the chemical bond between two atoms within a molecule can be described with the Lewis model or with a quantum model, like the theory of molecular orbitals. In both cases, the origin of the interaction is a sharing of electrons between the two partner atoms of the chemical bond.
There are three types of chemical bonds: single bonds, double bonds, and triple bonds. Indeed, the type of chemical bond depends on the number of electrons shared between the bound atoms:
* Simple bonds have 2 shared electrons.
* Double bonds have 4 shared electrons.
* Triple bonds have 6 shared electrons.
This number of electrons shared between the atoms depends on the electronic structure of these atoms and thus on the rules of the byte and the duet.
Alan has been driving 20 mph for the last half hour. The truck next to him has been there for a while now, so Alan is
correct to assume that the
A)
)
truck is parked.
B)
speed of the truck is 10 mph.
speed of the truck is 20 mph.
D)
speed of the truck is 30 mph.
which two particles would be attracted to each other?
Answer: protons and electrons.
Explanation:
NEED HELP ASAP. Write a statement explaining your claim about whether or not the equation is correctly balanced.
Then, provide evidence that supports your claim about whether or not the equation is correctly
balanced. Next, connect your evidence to your claim about the equation.
Answer:
Explanation:
Hi! can you add the choices.
Someone pls help me I will make you brain
Answer:
Thanks but I already have a brain LOL.
Your answer is D cooler temperatures.
Melting permisfrost actualy is a source of greenhouse gas because it realeses water which could in turn be vaporized eventualy.
1. What atoms make up a molecule of Water?
2. What atoms make up a molecule of Carbon Dioxide?
I would appreciate it if this got answered and I will mark as brainliest, thank you.
Explanation:
Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom
Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms.
I hope you got it..... ♥️
Answer:
1) 1Atoms join together to form molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. **
2) Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms. Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. ^^
Equation between Mg and H2O
Answer:
Mg + 2H2O → Mg(OH)2 + H2, is normally sluggish, but it becomes reasonably rapid when a milled composite of powdered magnesium metal and powdered iron (1−10 mol %) is used with sodium chloride solutions.
6. Potential energy can be
transformed into kinetic energy
of force is applied to the object.
True or false?
Answer:
true
Explanation:
because there is love in the universe and we converse in each others mind soul brain time stone
how many sulfide ions are in 15 dg of sodium sulfide?
There are 1.16x10²² sulfide ions (S²⁻) in 15 dg of sodium sulfide (Na₂S).
The equation for sodium sulfide is the following:
Na₂S → 2Na⁺ + S²⁻ (1)
So from equation (1), we can see that in 1 mol of sodium sulfide we have 1 mol of sulfide ions and 2 moles of sodium ions.
First, let's find the number of moles of Na₂S
[tex] n_{Na_{2}S} = \frac{m_{Na_{2}S}}{M_{Na_{2}S}} [/tex] (2)
Where:
[tex]m_{Na_{2}S}[/tex]: is the mass of Na₂S = 15 dg = 1.5 g
[tex]M_{Na_{2}S}[/tex]: is the molar mass of Na₂S = 78.0452 g/mol
The number of moles of Na₂S is (eq 2):
[tex] n_{Na_{2}S} = \frac{1.5 g}{78.0452 g/mol} = 0.0192 \:mol [/tex]
We can find the number of ions of S²⁻ with Avogadro's number, knowing that the number of moles of Na₂S is equal to the number of moles of S²⁻ (eq 1).
[tex] ions_{S^{2-}} = \frac{6.022 \cdot 10^{23} \:ions}{1\:mol}*0.0192 \:mol = 1.16 \cdot 10^{22} \:ions [/tex]
Therefore, there are 1.16x10²² sulfide ions in 15 dg of sodium sulfide.
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What evidence is there to support the theory that strong nuclear force is greater than electromagnetic force?
A: Electrons are attracted to protons.
B: Protons repel other protons.
C:The nucleus holds the protons together.
D:Protons and neutrons are attracted to each other.
Answer:
The electromagnetic force is a long range force which acts of charged particles. Like charges repel and unlike charges attract. ... The strong nuclear force is very short range and can only bind adjacent protons and neutrons. The electromagnetic force is long range.
Explanation:
70 points!!!! will mark the brainliest,
ANSWER ASAP PLS??????????????
Answer:
I believe it's A.
Explanation:
Answer:
option C
Explanation:
There are 2 types of changes
Physical change :- The physical properties are changed and its temporary.Chemical change :- The chemical properties are changed and its permanent.Metals are good conductors of current.
Answer:
absolutely correct....................
Someone pls help me I will make you brain
Answer:
the second answer
Explanation:
Answer:
A Erosion of structures and buildings
Explanation:
Which material is a heterogeneous mixture?
O A. A brass coin
B. Tap water
C. Vinegar
D. Soil
Answer:
D
Explanation:
Heterogeneous mixture is a mixture of non-uniform composition & in which the components can be easily identified
Answer:
Soil
Explanation:
Soil is made up of many things (therefore it's not pure) and does not appear to be uniform; it does not look the same throughout. Therefore it is heterogeneous.
Help! Will go be brianleist
Answer:
d
Explanation:
Answer: c
Explanation:
Unless otherwise instructed, you may refer to the periodic table in the Chemistry: Problems and Solutions book for this question.
Which element belongs to the p-block?
cobalt
oxygen
rubidium
hydrogen
Which of the following elements has the smallest atomic radius?
Group of answer choices
Nitrogen
Oxygen
Fluorine
Carbon
Answer:
Fluroine
Explanation:
Answer:
Fluorine
Explanation:
Nitrogen atomic radius: 155 pm
Oxygen atomic radius: 152 pm
Fluorine atomic radius: 147 pm
Carbon atomic radius: 170 pm
Therefore, fluorine has the smallest atomic radius.
what is responsible for changes in the state of matter?
and how are
the molecules of a liquid different from that of a solid? PKSS HELOOOÑLPPPP
Answer:
Temperature and pressure are the two factors which are responsible for change in state of matter.
Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.
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6) A 14.5 g sample of sodium chloride reacts with excess fluorine gas according to
the following chemical equation.
2 NaCl(s) + F2(g) → 2 NaF(s) + Cl2(g)
a. How many grams of sodium fluoride are produced?
b. How many grams of chlorine gas are produced?
The mass of chlorine gas produced by 14.5 grams of sodium chloride is 10.42 g.
The mass of chlorine gas produced by 14.5 grams of sodium chloride is 8.81 g.
The given parameters;
mass of the sodium chloride, = 14.5 g2NaCl(s) + F2(g) → 2NaF(s) + Cl2(g)In the reaction above, we can deduce the following;
molecular mass of 2Nacl = 2(58.44) = 116.88 g
molecular mass of 2NaF = 2(42) = 84 g
molecular mass of Cl2 = 71 g
The mass of sodium fluoride produced by 14.5 grams of sodium chloride is calculated as follows;
116.88 g of NaCl --------------- 84 g of NaF
14.5 g of NaCl ------------------- ?
[tex]= \frac{84 \times 14.5}{116.88} \\\\= 10.42 \ g[/tex]
The mass of chlorine gas produced by 14.5 grams of sodium chloride is calculated as follows;
116.88 g of NaCl --------------- 71 g of Cl2
14.5 g of NaCl ------------------- ?
[tex]= \frac{14.5 \times 71}{116.88} \\\\= 8.81 \ g[/tex]
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What reasons did the Pilgrims give for creating the Mayflower Compact?
to create a colony, establish a new church, and provide a long life for their children
to organize a new nation and create order, and for financial gain
to organize themselves, guarantee a long life for the colony, and achieve their goals in setting up the colony
“[To] Combine ourselves together into a Civil Body Politic, for our better ordering and preservation and furtherance of the ends aforesaid”
—Mayflower Compact
Answer:
To organize a new nation and create order and for financial gain.
Answer:
C the person above is wrong its
Explanation:
to organize themselves, guarantee a long life for the colony, and achieve their goals in setting up the colony
Explanation:
Which hybrid orbitals overlap to form the sigma bonds between the indicated atoms in xanthine?
Many nitrogen and carbon atoms can be found in the structure of a heterocyclic molecule called xanthine, which is present in many biological systems.
The development of a sigma bond between these atoms is an essential component of its binding. A special example is the sigma bond between the nitrogen atom and the neighboring carbon atom. In the context of this sigma bond, the hybridization state of nitrogen can be either [tex]\rm sp^2[/tex]or [tex]\rm sp^3[/tex], and the hybridization state of carbon can be [tex]\rm sp^3[/tex]. A sigma bond is formed when the hybrid orbitals of carbon and nitrogen, which are each [tex]\rm sp^2[/tex] hybridized and [tex]\rm sp^3[/tex] hybridized, overlap. A strong covalent bond can develop when the [tex]\rm sp^2[/tex] hybrid orbitals of nitrogen and carbon line up. This allows electron sharing.
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Choose the answer that best completes the sentence below.
Chopping up a fish is an example of a physical change; _______, grilling a fish is an example of a chemical change.
A. as a result
B. for instance
C. including
D. on the other hand
Answer:
on the other hand
Explanation:
I think its correct
Which two elements are in the same group based on their atomic model?
Please help me with this ASAP.
Answer: 1 and 2
i think
Explanation: