does anyone know the answer to this riddle???

Answer:

The function of the mitochondria is to obtain and convert energy. What body system has a similar function?

Explanation:

Chloroplasts are very similar to mitochondria, but are found only in the cells of plants and some algae. Like mitochondria, chloroplasts produce food for their cells. Chloroplasts help turn sunlight into food that can be used by the cell, a process known as photosynthesis

Answer:

0.768 m

Explanation:

1 cm = 0.01 m

76.8 cm * 0.01 m/ 1 cm

0.768 m

Answer:

[tex]\boxed {\boxed {\sf About \ 3.53 \ *10^{24}atoms \ Co}}[/tex]

Explanation:

To convert from grams to atoms:

1. Convert grams to moles

First, find the molar mass of cobalt using the Periodic Table of Elements.

Next, use this mass as a ratio or fraction.

[tex]\frac{58.93319 \ g\ Co}{1 \ mol \ Co}[/tex]

Multiply the mass of the given sample (345 grams) by this ratio.

[tex]345 \ g \ Co *\frac{58.93319 \ g\ Co}{1 \ mol \ Co}[/tex]

Flip the fraction so the grams of Cobalt will cancel each other out when multiplying.

[tex]345 \ g \ Co *\frac{1 \ mol \ Co}{58.93319 \ g\ Co}[/tex]

[tex]345 \ *\frac{1 \ mol \ Co}{58.93319 }[/tex]

[tex]\frac{345 \ mol \ Co}{58.93319 } =5.854086636 \ mol \ Co[/tex]

2. Convert moles to atoms

Use Avogadro's Number, which tells us the number of units (in this case atoms) in 1 mole.

Use this number as a ratio or fraction.

[tex]\frac{6.022 * 10^{23} \ atoms \ Co}{1 \ mol \ Co}}[/tex]

Multiply this ratio by the number of moles we found.

[tex]5.854086636 \ mol \ Co*\frac{6.022 * 10^{23 }\ atoms \ Co}{1 \ mol \ Co}}[/tex]

The moles of Cobalt will cancel.

[tex]5.854086636 \ *\frac{6.022 * 10^{23 }\ atoms \ Co}{1 }}[/tex]

[tex]5.854086636 \ *{6.022 * 10^{23 }\ atoms \ Co}[/tex]

[tex]3.52533097*10^{24} \ atoms \ Co[/tex]

3.Round

The original measurement of 345 has 3 significant figures (3, 4, and 5). We must round to 3 sig figs, which is the hundredth place for this measurement.

[tex]3.52533097*10^{24} \ atoms \ Co[/tex]

The 5 in the thousandth place tells us to round the 2 to a 3.

[tex]3.53 \ *10^{24}atoms \ Co[/tex]

There are about 3.53*10²⁴ atoms of cobalt in 345 grams.

Answer:

During the daytime, when the sunlight hits the land surface, it is absorbed, causing the surface to heat up (think about how hot pavement gets on a sunny, summer day). The hot surface then heats up the air near the surface, causing it to rise

Explanation:

Answer:

When sunlight reaches the ground surface during the day, it is absorbed, allowing the surface to heat up (think about how hot pavement gets on a sunny, summer day). The air near the hot surface is then heated, allowing it to rise.

Explanation:

Answer:

Heres a very LONG answer-

The real answer:

Its in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles.

Answer:

telescope

Explanation:

i took the test

The telescope provide a means to explore the universe. There are different types of telescopes like reflecting, refracting, x-ray, gamma ray, etc. telescopes. The telescope used by the astronomer to study celestial objects with the shortest wavelengths is x-ray or gamma ray telescope.

An instrument which is used to view the distant objects is defined as the telescope. The higher the magnification of the telescope, the better will be the view. The lens in the front of the telescope is known as the objective lens.

There are two types of telescopes, they are refracting and reflecting telescopes. The refracting telescopes use lenses to focus the light whereas the reflecting telescopes use mirrors.

The X-ray and gamma ray telescopes collect light in the shorter wavelengths. X - ray telescopes help to study the sun, supernova and the other stars. Gamma ray telescope study black holes and pulsars.

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Answer:

yes

Explanation:

the sugar was a solid but after being dissolved in a liquid it changed state

Given :

Number of molecules of [tex]C_4H_2F_7I[/tex].

To Find :

How many moles are in given number of molecules.

Solution :

We know, in 1 moles of any element/compound contains [tex]6.022\times 10^{23}[/tex] at atoms/molecules.

So, number of moles in [tex]5.4\times 10^{24}[/tex] molecules are :

[tex]n = \dfrac{5.4\times 10^{24}}{6.022\times 10^{23}}\\\\n = 8.97 \ moles[/tex]

Therefore, number of moles are 8.97 .

Answer:

no it is not

Explanation:

Answer:

Next, the lb will be canceled at 2.2 lb and the kg would be canceled at 1 kg. You cross, multiply, then. 46 x 1 x 1000 is 46000, only moving to the decimal point. 1 x 2.2 x 1 will stay the same, so you'd have 46000 over 2.2.

Explanation:

kuroo man <3

Answer:

Next, the lb will be canceled at 2.2 lb and the kg would be canceled at 1 kg. You cross, multiply, then. 46 x 1 x 1000 is 46000, only moving to the decimal point. 1 x 2.2 x 1 will stay the same, so you'd have 46000 over 2.2.

Explanation:

halo

Answer:

eons.

It would be D. An eon.

Answer: They are all odorless, colorless, monatomic gases with very low chemical reactivity.

Explanation: Plz give brainliest

Answer:

a

Explanation:

uh process of elimination

Temperature change, phase change to liquid or gas are all physical changes not chemical reactions. A color change indicates a chemical reaction has taken place.

Chemical changes are taking place by the breaking or making of chemical bonds. It results in the formation of a new product which is having different properties than the initial substances.

Physical changes does not involve any change in chemical bond. Phase changes, change in size, shape, conductivity, solubility etc. are physical changes. A change in temperature phase conversion into gas or liquid are all physical changes.

A change in color indicates that a new product is formed there. For  example reddish brown rust is iron oxide formed by the reaction of Fe with oxygen. Therefore, option c is correct.

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Answer:

11.43 cm

Explanation:

Answer:h

Explanation:

Answer:

1. Classical conditioning. Classical conditioning is a type of associative learning based on the association between a neutral stimulus with another that is significant for a person or an animal in order to generate a similar response.

Have a great day/night, and stay safe!

Answer:

The answer is A.........

Answer:

It´s letter A

Explanation:

Answer:

The Middle Years

Explanation:

Depending on the size of the star, the period of which thermal energy is created through the process of nuclear fusion can vary. However, for the life cycle of an average star, this can be roughly a few billion to 10 or even 15 billion years

Answer:

Answers. 7.8286×10²¹ particles.

Explanation:

The particles present in the sample of ammonium carbonate are  [tex]0.7826*10^{23}[/tex] particles. This can be calculated by using number of moles.

It is defined as the given mass over molar mass.

Given mass= 12.7 g

Molar mass of ammonium carbonate= 96.06 g/mol

Number of moles = 12.7 g / 96.06 g/mol

Number of moles = 0.13 moles

One mole:

A mole is the amount (10) of material containing [tex]6.02214 * 10^{23}[/tex] particles.

1 mol =  [tex]6.02214 * 10^{23}[/tex] particles

So, 0.13 moles = [tex]6.02214*10^{23}*0.13=0.7826*10^{23} \text{ particles}[/tex]

thus, there are [tex]0.7826*10^{23}[/tex] particles are present in 12.7 g of ammonium carbonate.

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Answer:

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.

Explanation:

1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.

Answer:

Lowering activation energy of a reaction.

Explanation:

Activation energy is the minimum amount of energy required by the reactants just to be converted to products.

Since catalysts increase the rate of reaction, activation complex is reached in short period of time hence activation energy is lowered.

Answer:

K potassium have least ionization energy among these four

Explanation:

Ionization energy values are given in kilo joule per mole

Ca 590

Ge 762

K 419

Ga 579

From above data we can understand stand K has least and Ge has highest ionization energy

Answer:

mass number- 7 (round it to 7

Explanation:

Answer:

See explanation

Explanation:

Accidental overlap of signals are common in H-1 NMR than in C-13 NMR for the following reasons;

1) 13C has a very low  natural abundance compared to H-1

2) 13C nucleus is s many times lesser in NMR sensitivity than H-1 nucleus.

3) As a result of its low abundance,  13C-13C coupling is not common.

4) Longer relaxation times do not give room for integrations.

5) Peaks in 13C spectra mainly consists of single lines.

As a result of all these, 13C-NMR spectra take longer to acquire than H-NMR. Hence, accidental overlap of signals is much more common in H-1 NMR than in C-13 NMR.

Answer:

a. increases

b. increases

c. decreases

The mass of sodium chloride : 3.5 g

Given

Reaction :

2.5g of sodium sulphate + 4.5g of barium chloride ⇒ 3.5g of barium sulphate + sodium chloride

Required

The mass of sodium chloride

Solution

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

From the reaction :

mass of reactants = 2.5 g + 4.5 g = 7.0 g

mass of products = 3.5 g + mass of sodium chloride

mass of reactants = mass of products

7.0 g = 3.5 g + mass of sodium chloride

mass of sodium chloride = 7 g - 3.5 g =3.5 g

Answer:

The instantaneous speed at 2 seconds =

3 m/s

The average speed over the entire trip is

2 m/s

Explanation:

Answer above is wrong and doesn't state anything about the answer, so this is the correct answer hope this helped! :)

Answer:

1.) 3 m/s   2.) 2 m/s

Explanation:

I hope this helps!!

Answer:

running helps my heart beat

Answer:

Exercise: The easiest and most effective way to achieve a lasting lower heart rate is to do regular exercise. 2. Stay hydrated: When the body is dehydrated, the heart has to work harder to stabilize blood flow. Throughout the day, drink plenty of sugar- and caffeine-free beverages, such as water and herbal tea.