Help with these 2 answers!

Answer:

8.801×10^-18 moles Ca

Explanation:

5.3 X 10^6atoms* (1mol/6.022*10^23) = 8.801×10^-18 moles Ca

Answer:

i believe it should be b, 11,000 seconds

Explanation:

Answer:

D: 13,200

Explanation:

Answer:

2

Explanation:

Answer:368.875 cg

Explanation:

0.13oz (1lb/16oz) (454g/1lb)(100cg/1g)= 368.875 cg

Answer:

yes

Explanation:

Answer:

16603.6

or

1.66036 x 10^4

Hope this helps! ^_^

Answer:

16,603.6

Explanation:

(4.5 x 10 - 14) x (5.2 x 103)

(45 -14) x 535.6

31 x 535.6

16,603.6

what are the answers

Explanation:

got this and dont know what it is

The correct answer is- The black balls represent carbon atoms.

Molecular models are three dimensional representations of a a molecule that enables us to visualize the molecule.

Molecules are represented by three dimensional models. These models help us to really have a firm grasp of what the molecule should look like.

In this particular question, we are told that ethanol has two carbon atoms, six hydrogen atoms, and one oxygen atom.

Also, we have; one red ball two black balls six white balls eight sticks What do the black balls in the model.

This implies that the two black balls must represent carbon atoms from the information provided.

https://brainly.com/question/1389682

Answer:

2 mL.

Explanation:

From the question given above, the following data were obtained:

Volume of water = 8 mL

Volume of water + Aluminium = 10 mL

Volume of Aluminium =?

The volume of aluminium can be obtained by calculating the difference between the volume of the water + aluminium and the volume of water. This is illustrated below:

Volume of aluminium = (Volume of water + Aluminium) – (volume of water)

Volume of water = 8 mL

Volume of water + Aluminium = 10 mL

Volume of Aluminium = 10 – 8

Volume of Aluminium = 2 mL

Therefore, the volume of aluminium is 2 mL.

Answer:

first you could say did you know that you 3% of sodium in sprit but the good thing is that sodium wont make you gain any pounds if it weren't for sodium all are food wouldn't be preserved we would be eating unpreserved food witch could really hurt your body.

Explanation:

hope it  helps

Answer:

physical change

Explanation:

the cutting doesnt change the chemical structure of the sodium

Answer:

Natural abundance of X is 75.18amu.

Explanation:

The atomic mass of an element is defined as the mass of its isotopes times its natural abundance.

In the unknown element X, the atomic mass of the isotope ⁷⁵X is 75 amu and of ⁷⁷X is 77 amu.

That means the natural abundance of X is:

75amu*91.0% + 77amu*9.00%

Answer:

Explanation:

ROYGBIV

Red=>Orange=>Yellow=>Green=>Blue=>Indigo=>Violet rays

Answer: all

Explanation:all

Answer:

Explanation:

456 convert to kg= 0.456

don;t know what units you have for volume  but

density= mass/volume

0.456/13=0.035kg/cm3

Answer:

1.33 moles

Explanation:

Answer:

8.00 x 10^23 / 6.02 x 10^23

Explanation:

sorry dont have my calculator but if you put it in you will get the answer

Answer: decomposing biomass

Answer:

number of individuals

Explanation:

calculated by dividing the number of people by area

Answer:

It indicates the ammount of individuals per unit square area

Explanation:

If you have 500 people in a 500 squared miles the population density would be 1 person every one squared mile.

Answer and Explanation:

Solids:

We can name some chemical elements that in nature are solids at room temperature:

Aluminium (Al): it is a dultile metal with a color between silver and white.

Sulfur (S₈): it is a pale yellow solid.

Zinc (Zn): it is a metallic brittle solid.

Liquids:

Some substances that are liquids at room temperature are:

Water (H₂O): it is a subtance composed by 2 atoms of hydrogen and 1 atom of oxygen. It is a clear, limpid, odorless liquid.

Bromine (Br₂): it is a homogenoeus halogen which is liquid at room temperature. It has a color beteween red and brown.

Mercury (Hg): this heavy metal is liquid at room temperature.

Gases:

Hydrogen (H₂): it is a colorless, odorless and hightly inflammable gas.

Oxygen (O₂): a diatomic gas, without odor neither color, with an important role in biological proceesses.

Nitrogen (N₂): other diatomic gas, which is inert (it does not react easily).

A substance may exist as solid, liquid or gas at room temperature.

There are three states of matter;

The particular state of matter in which a substance exists at room temperature depends on the magnitude of intermolecular interaction between the molecules of the substance.

The following are gases at room temperature;

The following are liquids at room temperature;

The following are solids at room temperature;

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Answer:

The percent error of the thermometer is 3%

Please give me the brainliest if you find this helpful

The boiling point of water is 100°C. During an experiment, water came to a boil at 97°C. The percent error of the thermometer is -3 %

Percent error is the error of the percentage of the calculation. It is calculated by subtracting the actual value from the expected value and dividing it by the expected value. So the formula will be:

The actual value is the value that is cone by doing the experiment. The calculation that is come in the experiment.

The expected value is the pre-estimated values that are estimated before the experiment.

Percent error = actual value - expected value / expected value x 100

The actual value = 97°C

The expected value = 100°C.

Putting value in the formula

97 - 100 / 100 x 100 = -3

Thus, the percent error of the thermometer is -3 %

To learn more about percent error, refer to the link:

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#SPJ2

Answer: a. 1,200 mL

Explanation:

20 x 12 x 5 = 1,200

(L x W x H)

Answer:

The reason carbon-13 is more abundant than carbon-14 despite them both being  isotopes is because carbon-13 is stable and doesn't decay into other elements, unlike carbon 14.

Explanation:

Carbon isotopes come in three forms. By far the most common isotope of carbon is carbon-12 (12C), which contains six neutrons in addition to its six protons. The next heaviest carbon isotope, carbon-13 (13C), has seven neutrons. Both 12C and 13C are called stable isotopes since they do not decay into other forms or elements over time. The rare carbon-14 (14C) isotope contains eight neutrons in its nucleus. Unlike 12C and 13C, this isotope is unstable, or radioactive. Over time, a 14C atom will decay into a stable product.

Answer:

(c)

Explanation:

in both black and red

Answer:

I think 3 im am not sure

Explanation:

Answer:

Compounds can be broken down into simpler substances by chemical means, but element can't broken down

Explanation:

Answer

thus, 4 moles of oxygen gas (O2) would have a mass of 128 g.

Answer:

The diagr displays the "DIFFUSION" of oxygen from the red blood cells into the capillary to the body cells

The diagram showing the direction of oxygen transfer from red blood cells to body cells describes the process of diffusion.

Particles travel by a process called diffusion from a region of higher concentration to one of lower concentration. When it comes to oxygen transfer in the body, oxygen molecules flow through cell membranes from red blood cells, where their concentration is higher, into body cells, where it is less concentrated.

Active transport refers to the movement of particles against their concentration gradient, requiring energy input. Osmosis is the diffusion of water molecules across a selectively permeable membrane. Transpiration is the process of water movement through plants. These processes are not directly related to the transfer of oxygen from red blood cells to body cells.

Therefore, the correct option is diffusion.

Learn more about diffusion here:

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#SPJ 2

Answer:

The answer is increasing the distance between two objects decreases the gravitational force. which is C

Explanation:

Answer:

mutualism describes the ecological interaction between two or more species where species has a net benefit. 2. The doctrine that mutual dependence is necessary to social well-being

Explanation:

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