which of the following molecules has a shape is trigonal pyramid?

ccl4
ch2o
Nh2o
h2o

Answers

Answer 1

Nh2o has a trigonal pyramid

Related Questions

The temperature of a container of oxygen gas is increased from 149 k to 298 k which of the following statement is true, Explain:

A. The average kinetic energy of the oxygen molecules in the container decreases.
B. The average chemical potential energy of the oxygen molecules in the container increases.
C. The average kinetic energy of the oxygen molecules in the container increases.
D. The average chemical potential energy of the oxygen molecules in the container decreases.

Answers

Answer:

The average kinetic energy of the oxygen molecules in the container increases

Explanation:

I searched up, "what happens when the temperature of oxygen gas is increased''

As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.

this is the answer google gave me so im not sure of you should 100% trust it but its better than nothing

The temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.

What is kinetic energy?

A kinetic energy is defined as a form of energy that an object or particle has by its motion.

It can be expressed as

K.E. = 1/2 mv²

There are basically three types of kinetic energy.

Translational kinetic energyRotational kinetic energyVibrational kinetic energy

The average kinetic energy is a product of half of the mass of each gaseous molecules.

The average kinetic energy is directly proportional to temperature.

Thus, the temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.

To learn more about kinetic energy, refer to the link below:

https://brainly.com/question/12669551

#SPJ2

A compound is made up of 28 g N, 24 g C, 48 g O, and 8 g H .What is the empirical formula?

Answers

Answer:

[tex]\rm C_2H_8N_2O_3[/tex].

Explanation:

Step One: calculate the coefficients.

Look up the relative atomic mass of these four elements on a modern periodic table:

[tex]\rm C[/tex]: approximately [tex]12[/tex].[tex]\rm H[/tex]: approximately [tex]1[/tex].[tex]\rm N[/tex]: approximately [tex]14[/tex].[tex]\rm O[/tex]: approximately [tex]16[/tex].

The relative atomic mass of an element is numerically equal to the mass (in grams, [tex]\rm g[/tex],) of one mole of atoms of this element.

For example, the relative atomic mass of [tex]\rm C[/tex] is approximately [tex]12[/tex]. Therefore, each mole of [tex]\rm C\![/tex] atoms would have a mass of [tex]12\; \rm g[/tex].

This sample contains [tex]24\; \rm g[/tex] of carbon. That would correspond to approximately [tex]\displaystyle \left(\frac{24}{12}\right)\; \rm mol = 2\; \rm mol[/tex] of [tex]\rm C[/tex] atoms.

Similarly, for the other three elements:

[tex]\displaystyle n(\mathrm{H}) \approx \frac{8\; \rm g}{1\; \rm g \cdot mol^{-1}} = 8\; \rm mol[/tex].

[tex]\displaystyle n(\mathrm{N}) \approx \frac{28\; \rm g}{14\; \rm g \cdot mol^{-1}} = 2\; \rm mol[/tex].

[tex]\displaystyle n(\mathrm{O}) \approx \frac{48\; \rm g}{16\; \rm g \cdot mol^{-1}} = 3\; \rm mol[/tex].

Hence, the ratio between these elements in this compound would be:

[tex]n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3[/tex].

In the empirical formula of a compound, the coefficients should represent the smallest possible integer ratio between the number of atoms of these elements.

[tex]n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3[/tex] is indeed the smallest possible integer ratio between the number of atoms of these elements.

Step Two: arrange the elements in an appropriate order

Apply the Hill System to arrange these four elements in the empirical formula. In the Hill System:

If carbon, [tex]\rm C[/tex], is present in this compound, then:

[tex]\rm C[/tex] (carbon) and then [tex]\rm H[/tex] (hydrogen) will be the first two elements listed in the formula (ignore the hydrogen if it is not in the compound.) The other elements in this compound will be listed in alphabetical order.

If there is no carbon [tex]\rm C[/tex] in this compound, then list all the elements in this compound in alphabetical order.

Both [tex]\rm C[/tex] (carbon) and [tex]\rm H[/tex] (hydrogen) are found in this compound. Therefore, the first element in the list would be [tex]\rm C\![/tex]. The second would be [tex]\rm H\![/tex], followed by [tex]\rm N\![/tex] and then [tex]\rm O\![/tex].

Hence, the empirical formula of this compound would be [tex]\rm C_2H_8N_2O_3[/tex].

The empirical formula of the compound is C₂H₈N₂O₃

From the question given above, the following data were:

Carbon (C) = 24 g

Hydrogen (H) = 8 g

Nitrogen (N) = 28 g

Oxygen (O) = 48 g

Empirical formula =?

The empirical formula of the compound can be obtained as follow:

C = 24 g

H = 8 g

N = 28 g

O = 48 g

Divide by their molar mass

C = 24 /12 = 2

H = 8 /1 = 8

N = 28 /14 = 2

O = 48 / 16 = 3

We can see from the above calculations that the elements are in simple whole number ratio.

Thus, the empirical formula of the compound is C₂H₈N₂O₃

Learn more: https://brainly.com/question/8450755

Which of these is a characteristic of science?

Answers

Answer:

What are the characteristics of science? Objectivity: Scientific knowledge is objective. Verifiability: Science rests upon sense data, i.e., data gathered through our senses—eye, ear, nose, tongue and touch. Ethical Neutrality: Science is ethically neutral. Systematic Exploration.

Explanation:

there are no options but I search and this is what I got.

can I have brainliest

The molecule cyanazine, once used as an herbicide, has now been phased out by the EPA because of its significant human toxicity. Add lone pairs, as needed, to the structure of cyanazine. Indicate the hybridization of the specified atoms. Be sure to consider any lone pairs you added to the structure. The structure of cyanazine has 5 atoms highlighted. Atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds. Atom 2 is an N atom bonded to one C atom through a single bond and one C atom through a double bond. Atom 3 is a C atom bonded to one C l atom and one N atom through a single bond and one N atom through a double bond. Atom 4 is a C atom that is bonded to three C atoms and one N atom through single bonds. Atom 5 is a C atom that is bonded to one C atom through a single bond and one N atom through a triple bond. What is the hybridization of atom 1

Answers

Answer:

Sp3

Explanation:

According to the question, atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds.

Whenever nitrogen is bonded to three atoms via single bonds (in this case two carbon atoms and one hydrogen atom) the nitrogen atom is sp3 hybridized and in tetrahedral geometry. The lone pair on nitrogen atom occupies one of the hybrid sp3 orbitals.

Cyanazine is used as an herbicide to control the growth of weeds and annual grasses. The herbicide has been phased out due to increased toxicity to the environment and humans.

The hybridization of the molecule is sp³.

The given information in the question suggests that Nitrogen (atom 1) to two Carbon atoms and single bonded to 1 hydrogen atom.

The nitrogen is bonded with three single bonds, two with carbon and one with a hydrogen bond.

Based on the given data, the hybridization of the molecule will be sp³ and will have tetrahedral geometry. The lone pair present on the nitrogen atom will occupy one of the hybrid sp³ orbitals.

Therefore, the sp3 hybridization of the cyanazine molecule will exist.

To know more about the hybridization of cyanazine refer to the following link:

https://brainly.com/question/3225102

. A protein has molecular mass of 400 kDa when measured by size exclusion chromatography. When subjected to gel electrophoresis in the presence of sodium dodecyl sulfate (SDS), the protein gives three bands with molecular masses of 180, 160, and 60 kDa. When electrophoresis is carried out in the presence of SDS and dithiothreitol, three bands are again formed, this time with molecular masses of 160, 90, and 60 kDa. Determine the subunit composition of the protein.

Answers

Answer:

The protein has 4 subunits: 2 subunits of 90 kDa, 1 subunit of 160 kDa and 1 subunit of 60 kDa

Explanation:

In gel electrophoresis, the SDS agent produces denaturation of the protein and confers negative charge, so the protein subunits can migrate according to their masses. It produces dissociation of the protein in its subunits but it cannot disrupt disulphyde bridges (S-S) that can bond subunits together.

From the data, with SDS we observe 3 bands ⇒ 180 kDa + 160 kDa + 60 kDa

The addition of dithiotreitol (DTT), a reducing agent, produces the disruption of disulphyde bridges. From the data:

With DTT ⇒ 160 kDa + 90 kDa + 60 kDa

We observe that 160 kDa and 60 kDa subunits are conserved (they are the same as with SDS only), but 180 kDa subunit is missing and in its place appears a band of 90 kDa - a half 180 kDa.

So, the band at 180 kDa is composed by two subunits bonded by a disulphyde bridge.

Therefore, the composition of the protein is: 1 subunit of 160 kDa, 2 subunits of 90 kDa and 1 subunit of 60 kDa.

determine the number of moles of KOH present in 95.0 ml of 0.255 M solution

Answers

Answer:

Moles of KOH in 1000 mL solution = 0.255 moles

Moles of KOH in 1 mL solution = 0.255/1000 = 0.000255 moles

Moles in 95 mL solution = (95 * 255)/1000000 = 24225/1000000

Moles of KOH in 95 mL 0.255M solution = 0.024225 moles

The number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol

HOW TO CALCULATE NUMBER OF MOLES:

The number of moles of a substance can be calculated by multiplying the molarity/concentration of the substance by its volume:

no. of moles = molarity (M) × volume (L)

According to this question, 95.0 ml of KOH is present in 0.255 M solution, hence, the number of moles can be calculated as follows:

Volume of KOH = 95.0ml = 0.095L

no. of moles = 0.095 × 0.255

no. of moles = 0.024mol

Therefore, the number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol.

Learn more at: https://brainly.com/question/21085277?referrer=searchResults

The chemical formula for carbonic acid, a compound used in carbonated drinks, is H2CO3. Assume that these symbols represent the three
elements of this compound:
carbon
oxygen
hydrogen
Which picture correctly represents carbonic acid?

Answers

The top one is the correct answer

The chemical formula of carbonic acid is H₂CO₃ and in the structure form it will be represented according to the first structure.

What are acids?

Acids are those substances which are having carboxylic group (-COOH) as a funtional group in it.

Given molecular formula of carbonic acids is H₂CO₃, in which one carbon atom is present in carboxylic group. In the molecule two hydrogen atoms are present and one of them is present in -COOH group and all three oxygen atoms are attached with carbon atom.

Hence the first image shows the structure of carbonic acid.

To know more about carbonic acid, visit the below link:

https://brainly.com/question/26083032

If a bike messenger travels 16 kilometers in a time of 8 minutes, what is her average speed?

Answers

Answer:

Explanation:

16 ÷ 8 = 2

Write balanced, net ionic equations for the following precipitation, acidn base, or gasn forming reactions. Include states of matter. Hint: You should write the molecular equation first to predict the products. a) mixing aqueous solutions of iron (III) chloride and lithium sulfide b) mixing aqueous solutions of sodium acetate and ammonium phosphate c) mixing aqueous solutions of perchloric acid and potassium hydroxide d) mixing aqueous solutions of ammonia and nitric acid e) mixing aqueous solutions of nitrous acid and sodium hydroxide f) adding aqueous hydroiodic acid to solid calcium carbonate g) Problems c) through f) are acid- base reactions. Comment on the differences in the net ionic equations for these reactions.

Answers

Answer:

Explanation:

a ) 2FeCl₃ + 3Li₂S = Fe₂S₃ ( s ) + 6 LiCl

2Fe⁺³ + 6Li ⁻ + 6Cl⁻ + 3S⁻² = 6Li + 6Cl⁻ + Fe₂S₃ ( s )

b )

3CH₃COONa +( NH₄)₃PO₄ = 3CH₃COONH₄ + Na₃PO₄

3CH₃COO + 3Na⁺ + 3NH₄⁻ + PO₄⁺³ = 3CH₃COO⁻ +3NH₄⁺ + Na₃PO₄

c )

HClO₄ + KOH = kClO₄ + H₂O

H ⁺ + ClO₄⁻ + K⁺ + OH⁻ = k⁺ ClO₄⁻ + H₂O

d )

NH₄OH + HNO₃ = NH₄NO₃ + H₂O

NH₄⁺ + OH⁻ + H⁺ + NO₃⁻ = NH₄⁺ + NO₃⁻ + H₂O

e )

HNO₂ + KOH = KNO₂ + H₂O

H⁺ + NO₂⁻ + K⁺ + OH⁻ = K⁺ + NO₂⁻ + H₂O

f ) HIO₃ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃

H⁺ + IO₃⁻ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃

g )

c ) is strong acid and strong base

d ) is weak base and strong acid

e ) weak acid and strong base

f ) Strong acid and basic salt

Which option is an example of a chemical change?
fireworks exploding
grinding powder
ironing a shirt
melting cheese

Answers

Answer:

the answer would be A. fireworks exploding

Explanation:

I TOOOK The test and i got thisone wrong lol so i reviwed what

i got wrong

Answer:

Fireworks exploding

(yes, i know i'm late UvU )

Read the scenario, and then answer the question that follows. Randy is the chief technology officer of a growing company. The company he works for is considering their software needs. The company currently has a few licenses for a proprietary software solution, but will need to greatly expand their operations quickly. The company has asked Randy to recommend a software solution that will allow the company’s engineers to customize the software to fit the specific functions and duties of the company’s employees, and to cheaply expand their operations to other office branches. Which of the following options would best fit Randy’s needs?

Answers

Answer:

B (implement an open source software solution) I'm late sorry

Explanation:

Answer:b

Explanation:

Which structure is located at the base of the brain and receives neural signals about smell from the sensory receptors? A. olfactory cilia B. olfactory bulb C. olfactory cortex D. olfactory base

Answers

Answer:

B: Olfactory Bulb

Explanation:

edg2020

The olfactory bulb is located at the base of the brain and receives neural signals about the smell from the sensory receptors. Hence, option B is correct.

What are sensory receptors?

Sensory receptors are dendrites of sensory neurons specialized for receiving specific kinds of stimuli.

There are two olfactory bulbs on the bottom side of the brain, one above each nasal cavity.

The olfactory bulbs receive information about smells from the nose and send it to the brain by way of the olfactory tracts.

Hence, option B is correct.

Learn more about sensory receptors here:

https://brainly.com/question/9911075

#SPJ2

Please Help! 100 points!!!!!
In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? Explain your answers using important terms from the lesson and information provided in the laboratory.

Answers

Answer:

In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? ... When heat was added to the elements, the electrons absorbs the energy and moves to its excited state. Once the electron starts to fall back to a lower orbit, it emits energy in the form of light.

Happy to help ☀️Keep on shining☀️

Explanation:

When alpha particles were shot at a gold foil target, most of the particles were undeflected. This indicated to Rutherford that:______.
a) the gold foil was continuous matter.
b) the mass of the gold atoms was spread out thinly.
c) the atoms of gold were mostly empty space.
d) the alpha particles had great penetrating power.
e) the alpha particles had charges opposite to those on the nuclei.

Answers

Answer:

c) the atoms of gold were mostly empty space.

Explanation:

When alpha particles were shot at a gold foil target, most of the particles were un-deflected . It proved that the atom is mostly empty . The alpha particle enters the atom its velocity remains unchanged . Alpha particle has great kinetic energy due to great mass . So when it remains undeflected mostly that means the nucleus has great empty space through which alpha particle sails smoothly .

A drop of water contains 2 x 104 bacteria. How many bacteria are in 100 gallons of water? [1 drop = 1 mL]

Answers

Answer:

7.57×10⁹ bacteria.

Explanation:

We'll begin by convert 100 gallons of water to millilitres (mL). This can be obtained as follow:

1 gallon = 3785.41 mL

Therefore,

100 gallons = 100 gallon × 3785.41 mL / 1 gallon

100 gallons = 378541 mL

Therefore, 100 gallons of water is equivalent to 378541 mL.

Next, we shall convert 378541 mL to drop of water. This can be obtained as follow:

1 mL = 1 drop

Therefore,

378541 mL = 378541 mL × 1 drop/ 1 mL

378541 mL = 378541 drop

Therefore, 378541 mL is equivalent to 378541 drops of water.

Finally, we shall determine the number of bacteria in 378541 drops of water as follow:

1 drop = 2×10⁴ bacteria

Therefore,

378541 drop = 378541 drop × 2×10⁴ bacteria / 1 drop

378541 drop = 7.57×10⁹ bacteria.

Therefore, there are 7.57×10⁹ bacteria in 100 gallons of water

Infer: The metric system uses prefixes to tell you how much to multiply the base unit by. For example, in the metric system, the base unit for length is the meter. Examples of prefixes include kilo-, centi-, and milli-.

Knowing that 1,000 meters are in 1 kilometer, what do you think the prefix kilo- means?

Answers

Answer:

kilo means one thousand

Explanation:

Seeing as there are 1000 metres in one kilometre

Knowing that 1,000 meters are in 1 kilometer, The prefix kilo means 1000 or 1 kilogram (kg).

What is the metric system?

The metric system is the system that uses gram, liter, and meter as the base unit for measuring the distance, volume, and length of any object or entity.

The metric system was started in France in 1970. There are common seven units in the metric system. The three main base units are gram, liter, and meter.

A liter is used to measure the Volume. Grams are used to measuring the quantity of a solid item. Meter is used to measure the distance or length of anything.

The kilogram is the base unit for measuring the quantity of any solid item, such as rice, and 1 kg of rice is the quantity of rice.

Thus, the prefix kilo means 1000 or 1 kilogram (kg).

To learn more about the metric system, refer to the link:

https://brainly.com/question/25966695

#SPJ2

Predict the product for the following reaction:
Н,0, Н
ОН
ООО
ОН

Answers

I think it’s OH I’m not sure

How many atoms are in 8g of Oxygen (O2)?

Answers

Answer:

There are 3.011 × 10^23 oxygen atoms

In which way are photosynthesis and cellular respiration different?

A.
Cellular respiration stores ATP, while photosynthesis releases ATP.

B.
Cellular respiration produces oxygen, while photosynthesis uses oxygen.

C.
Photosynthesis releases energy, while cellular respiration stores energy.

D.
Photosynthesis used carbon dioxide, while cellular respiration produces carbon dioxide.

Answers

Answer:

D. Photosynthesis uses carbon dioxide while cellular produces carbon dioxide

The correct answer is D

HELP!!
What structure is found in the nucleus of a cell and is made up of coiled strands of DNA?
O protein
O gene
O chromosome
O centriole

Answers

the answer is Chromosome

Which part of an organism is preserved in cast and mold fossils?

Answers

Answer: Bones.

Explanation:

Answer:

Bone

Explanation:

100 POINTS & BRAINLIEST !!!! PLEASE HELP

Answers

Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons

Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons

Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons

Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons

Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons

Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons

Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons

Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons

Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons

Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons

Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons

Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons

Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons

Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons

Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons

Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons

Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons