How long is a sunflower seed? Select the best estimate.
15 meters
15 kilometers
15 millilmeters
15 centimeters

Answers

Answer 1

Answer:

15 millimeters

Explanation:

the other answer choices are too large.

Answer 2

Answer:

15 millimeters

Explanation:

The other options are too long.


Related Questions

20. A way to describe a chemical reaction
a. Equations
c. Molecules
b. Metals
d. Elements

Answers

D. Elements

Hope this helps


True or False? The energy carried by a sound
wave is blocked by collisition
between the particles in the
material the name is traveling
in

Answers

Answer:

true

Explanation:

i checked on moogle

True Is the answer ..scientific proved .

rank the crystal lattice structures in order of decreasing efficiency of space in the structure.

Answers

Rank the crystal lattice structures in order of decreasing efficiency of space in the structure.

1. Simple cubic

2. Body centered cubic

3. Face centered cubic

4. Hexegonal close packed

Give an example for the neutralisation between a strong acid and a weak base, also mention the nature of its salt.​

need help !! ~~~~

Answers

Answer:

Neutralization occurs when a strong acid and a strong base come together in a chemical reaction to form water and salt.

Explanation:

not sure huhuhu

Sources of error in colorimetry?

Answers

It is simply not accurate due to many reasons such as environment, user, instrument as well as light which can easily change colours

An atom which has 9 protons, 8 neutrons, and 9 electrons will have an atomic mass of how many amu?

a. 6

b. 8

C. 9

d. 17

Answers

Answer:

D

Explanation:

Protons and Neutrons both have a mass of about 1 amu so you add them but electrons have a mass of 0 amu so they are left out.

Determine the mass of O(2-) ions in 3 mol of alumina (Al2O3). Molar mass of O = 16)

Answers

Considering the rule of three and molar mass of O, the mass of O²⁻ ions in 3 mol of alumina Al₂O₃ is 96 grams.

By multiplying the number of moles by the subscripts next to each atom, you get the amount of each element present in the compound. IIf the same atom appears more than once in the compound, you must add its amounts.

So, in 1 mole of Al₂O₃, you have 2 ions of O²⁻.

Then you can apply the following rule of three: if 1 mole of the compound contains 2 ions of O²⁻, 3 moles of the compound contains how many ions of O²⁻?

[tex]amount of ions of O^{2-} =\frac{3 moles of Al_{2} O_{3} x2 ions of O^{2-}}{1mole of Al_{2} O_{3} }[/tex]

amount of ions of O²⁻= 6 ions

Being the molar mass of O 16 g/mole, this is the amount of mass that a substance contains in one mole, then the mass of O²⁻ can be calculated as:

6 x 16 g/mole= 96 grams

Finally, the mass of O²⁻ ions in 3 mol of alumina Al₂O₃ is 96 grams.

Learn more about molar mass:

https://brainly.com/question/3588290?referrer=searchResultshttps://brainly.com/question/25873251?referrer=searchResults

PLEASE HELP I AM FAILING

Answers

Answer:

160.3 g S

Explanation: there you go

please help fast thank yuo

Answers

Answer:

what is your question tell may i can help you

Answer:

decrease as we go down a group I know ionisation energy increases from left to right across the periodic table

How many sig figs are in 6.0395? Please no links-

Answers

Answer:

5 significant figures

Explanation:

The zeros as considered when they are in between or after numbers greater than zero.

Ex1: 0.005 = 1 significant figure

Ex2: 0.0050 = 2 significant figure

Ex3: 0.05500= 4 significant figure

Ex4: 5.00 = 1 significant figure

How do carbon atoms form many organic compounds

Answers

Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.

a wrong

b wrong

c right

d wrong

You are studying the boiling points of liquids with some fellow students. You have two liquids of different molecular weights, and you test each of them twice. You find that the one with a lower molecular weight also has a lower boiling point. You would like to be more confident with the pattern you are noticing. What are two possible next steps? In one to two sentences, give specific, different examples of how the experiment could be extended, assessed, or improved.

Answers

The boiling points of two or three other pairs of liquids in which one liquid has a lower molecular mass than the other can be studied in order to see if the pattern is consistent.

The boiling point of a substance refers to the temperature at which its vapor pressure is equal to the atmospheric pressure. The boiling point of a substance has a lot to do with its molecular mass.

Generally, substances that has a higher molecular mass has a higher boiling point except other factors at at work. In order to confirm whether the pattern that you are noticing about molecular weights and boiling point is consistent, three other liquids with different molecular masses, one being higher than the other can be studied and their boiling points compared.

Learn more about boiling points: https://brainly.com/question/2153588

if a substance has a normal boiling point of 50 °c, what can you state about the vapor pressure of the same substance at 40 0 °c?

Answers

It will be less because pressure is directly proportional to temperature

Read the following chemical equations.

Reaction 1: 2KI + H2O2 2KOH + 12
Reaction 2: Cl2 + H2 → 2HCI

Which of the following statements is true for both the chemical equations?

A. I is oxidized in reaction 1 and Cl2 is oxidized in reaction 2.

B. I is reduced in reaction 1 and Cl2 is reduced in reaction 2.

C. I is oxidized in reaction 1 and Cl2 is reduced in reaction 2.

D. I is reduced in reaction 1 and Cl2 is oxidized in reaction 2.​

Answers

This problem is providing two reduction-oxidation (redox) reactions in which the oxidized and reduced species can be identified by firstly setting the oxidation number of each element:

Reaction 1: 2K⁺I⁻ + H₂⁺O₂⁻  ⇒2K⁺O⁻²H⁺ + I₂⁰

Reaction 2: Cl₂⁰ + H₂⁰ ⇒ 2H⁺CI⁻

Next, we can see that iodine is being oxidized and oxygen reduced in reaction #1 and chlorine is being reduced and hydrogen oxidized in reaction #2 because the oxidized species increase the oxidation number whereas the reduced ones decrease it.

In such a way, the correct choice is C.

Learn more:

(Redox reactions) https://brainly.com/question/13978139

Which objects refract light? (Select all that apply.)
the human eye
contact lenses
a magnifying glass
concave mirrors

Answers

Concave mirrors, magnifying lens... sorry not sure about the rest
Magnifying glass and concave mirrors

Give one example of how environmental factor could influence the way a gene is expressed.

Answers

Answer:

The presence of drugs or chemicals in an organisms environment can also influence gene expression in the orgains.

Select from the unit conversion factor options below to determine the mass in grams of 1.204 × 1024 atoms of carbon.
1 mol C/ 6.02 x 1023 atoms C, 6.02 x 1023 atoms C / 1 mol C
12 g C / 1 mol, 1 mol / 12 g C



a
12040 g
b
24 g
c
204 g
d
1.99 g

Answers

Answer:

option a is the answer

Explanation:

bye bye

NO LINKS!!!
Help . . .

Where is the magnetic field strongest?
A. closest to the wire
B. Farthest from the wire

Answers

Answer:

In general, the magnetic field is strongest close to the wire and weaker farther away. In fact, the magnetic field weakens as 1/r1/r where rr is the distance from the wire. This can change a bit depending on the length and shape of the wire. Far enough away, the magnetic field decays as 1/r21/r2 .

Answer:

Closest to the wire

Explanation:

In general, the magnetic field is strongest close to the wire and weaker farther away. In fact, the magnetic field weakens as where is the distance from the wire. This can change a bit depending on the length and shape of the wire.

Match each type of reaction to its amount of potential energy. (PLEASE HELP )

Answers

Endo is more in reactants and exo is more in products because in exothermic reactions heat is released


Pls answer rn due tmr pls pls fast

Answers

Answer:

From bottom to top, Troposphere, Stratosphere, Mesosphere, Thermosphere, & at the top, Exosphere.

Explanation:

A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?.

Answers

Whether it conducts heat or electricity,if it is attracted by a magnet , high density high melting point

The question that will best help the student to classify the material is; "is the material malleable or ductile?"

Generally, materials can be classified as metals or non metals. There are properties that are particular to metals and there are properties that are particular to nonmetals and these properties can be used to identify each one of the materials.

The question that will best help the student to classify the material is; "is the material malleable or ductile?" These metallic properties.

Learn more:

https://brainly.com/question/1659592

Missing parts;

A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material? A. Is the material malleable or ductile? B. Does the material feel hard to the touch? C. Will the material float in water? D. Does the material feel rough or smooth?

Which of these is found in the energy levels of an atom?

Answers

Answer:

Electrons

Explanation:

Because the nucleas is In the middle and the Electrons surround it

How many moles of AgCl can form from 6.5 moles of Ag and abundant HCl in the equation: 2Ag + 2HCl -> 2AgCl + H2

Answers

6.5 moles of AgCl can be formed from 6.5 moles of Ag.

STOICHIOMETRY:

According to this question, silver reacts with hydrochloric acid to form silver chloride and hydrogen gas as follows:

2Ag + 2HCl → 2AgCl + H2

Based on this balanced equation, 2 moles of silver (Ag) produces 2 moles of silver chloride (AgCl).

This means that 6.5 moles of Ag will produce (6.5 × 2)/2 = 6.5 moles of AgCl.

Learn more about stoichiometry at: https://brainly.com/question/9743981?referrer=searchResults

Pls help if you only know the correct answer! Thanks!!

Answers

Answer:

1. H=2, O=1

2. H=4, O=2

3. C=1, O=1

4.

a. reactants C=1, O=2

b. products C=1, O=2

5.

a. reactants H=4, O=2

b. products H=4, O=2

6

a. reactants C=1, O=1, H=4

b. products C=1, O=1, H=4

Oxygen is produced by the reaction of sodium peroxide, Na2O2 , and water.
2 Na2O2 (s) + 2 H2O(l) ---> O2(g) + 4 NaOH(aq)
Calculate the mass of Na2O2 in grams needed to form 5.20 g of oxygen.

Answers

Answer: 23.53g

Explanation:

5.2/(2x16) = 0.1625 mol

0.1625 x 2 = 0.325 mol

0.325 x (23 x 2 + 16 x 2) = 78 x 0.325 = 23.53g

2 WHAT ARE THE THREE THINGS NECESSARY TO MAINTAIN A FIRE?

Answers

Oxygen, heat, and fuel

Answer:

Oxygen, heat, and fuel

Explanation:

Oxygen, heat, and fuel are frequently referred to as the "fire triangle." Add in the fourth element, the chemical reaction, and you actually have a fire "tetrahedron." The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.


2. How many MOLES of cobalt(III) sulfate are present in 4.25 grams of this compound?
moles.

Answers

Answer:

1 grams Cobalt(II) Sulfate = 0.006451787725861 mole using the molecular weight calculator and the molar mass of CoSO4.

Explanation:

What do you already know about gases?

Answers

Answer:

gasese molecules are always in free state

Tom pushes on a 50-kilogram box with a force of 25 newtons. Assuming the surface on which the box moves is frictionless, at what rate does the box accelerate?

Answers

Assuming the surface on which the box moves is frictionless, the rate at which the box accelerate is equal to 0.5 [tex]m/s^2[/tex].

Given the following data:

Mass of box = 50 kilogramForce = 25 newtons.

To determine the rate at which the box accelerate, assuming the surface on which the box moves is frictionless:

Mathematically, Newton's Second Law of Motion is given by the formula;

[tex]Force = mass \times acceleration[/tex]

Making acceleration the subject of formula, we have:

[tex]Acceleration =\frac{Force}{mass}[/tex]

Substituting the given parameters into the formula, we have;

[tex]Acceleration = \frac{25}{50}[/tex]

Acceleration = 0.5 [tex]m/s^2[/tex]

Read more on Newton's Law of Motion here: https://brainly.com/question/1121817

How did President Wilson anger civil rights advocates?

Answers

Answer:

He put segregationists in charge of federal agencies...

Explanation:

...

Answer:

He placed segregationists in charge of federal agencies.

Explanation:

Other Questions
which ratio is equivalent to 4:10? Choose ALL the equivalent ratios a q deben los cambios de la materia?? can someone help me out plz Consider a system which has a memory access time of 300 nsec. An average page fault takes around 10 millisecond to get serviced. If the page fault occurs with a probability of 4% in the system, then find out the effective memory access time of that system. If somehow, you manage to reduce the probability of page fault to 2%, then by how much the system performance improves as compared to the previous case? how many father-son pairs have won the same tournament? Which part of the LRAS curve looks similar to a " Classical LRAS^ prime prime curve?A. The Segment between A and BB. The Segment between B and CC. The Segment between C and DD. The Segment between A and C One of the impacts of the spread of Umayyad andAbbasid dynasties is that there was a lot more interactionwith a variety of people. There was a lot of tradehappening; of materials, language and religion. They wouldhave traded with the Byzantine empire for silks. The traderoute for this was called the what is a common obstacle that every civilization must face help me plz ineed help State whether the system is consistent or inconsistent. If it is consistent, then state whether the graphs' equations are dependent or independent. State the number of solutions. At Christmas you re......gifts from your friends and family. what is the missing word? ) Give the assembly language instruction sequence to enable external interrupt 0 (INT0) as an interrupt source and to make it falling-edge triggered. What signal (port and port pin) must be low to trigger a falling-edge trigger event for INT0 SCOSarah put 15 gumdrops on the roof of hergingerbread house. How many gumdropswill she need to make 16 more housesexactly like this one?MYgumdrops A 100-kg rock is on a 20-m cliff. If the rock is pushed off the cliff, how much kinetic energy does the rock have before hitting the ground? Draw the straight line y=2x-3 A concrete block (B-36 x10 C-') of volume 100 mat 40C is cooled to-10C. What is the change in volume? *A. It will increase by 0.18 mB. It will decrease by 0.18 m'C.It will increase by 0.05 mD. It will decrease by 0.05 m ophia can text 95 words in 10 minutes. At this rate, how many minutes would it take her to text 114 words? Fill out the table of equivalent ratios until you have found the value of x. Words Minutes 9595 1010 114114 xx You must answer all questions above in order to submit. attempt 1 out of 2 Christopher Vargas Tables of Equivalent Ratios (Guided) Dec 10, 9:21:57 AM Watch help video Sophia can text 95 words in 10 minutes. At this rate, how many minutes would it take her to text 114 words? Fill out the table of equivalent ratios until you have found the value of x. necesita ayuda? si alguien desea ayudar... tengo una agenda muy llena. tengo una reunin con un cliente. tengo que ir al banco. tengo que ir al dentista. AC current is produced by which of the following things? A. Remotes B. Generators C. Lights D. Lasers what is the course of human events in the declaration of independence