what are the roles of the mucous select two options PLEASE HELP​

Answer:

310.176722 grams

You can view more details on each measurement unit: molecular weight of Calcium Phosphate or grams The molecular formula for Calcium Phosphate is Ca3(PO4)2. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Calcium Phosphate, or 310.176722 grams.

Answer:

Explanation:

Mount Vesuvius is considered to be one of the most dangerous volcanoes in the world because of its proximity to the city of Naples and the surrounding towns on the nearby slopes. The volcano is classed as a complex stratovolcano because its eruptions typically involve explosive eruptions as well as pyroclastic flows

Answer:

lead

Explanation:

aluminum doesn't conduct heat

Answer:

1700: 5:1 124 123 !

Explanation:

Predict the percentage 123!

Answer:

8 atoms.

Explanation:

Answer:

Epsom salt is magnesium sulfate.

Alkaline earth metal, which is also sold in other products like milk of magnesia and Epsom salt magnesium sulfate and magnesium hydroxide.

The elements that make up group 2 of the current periodic table are the alkaline earth metals. Beryllium, magnesium, calcium, strontium, barium, and radium are among the elements in this group.

The physical and chemical characteristics of the elements in this group are quite similar. However, they are not often encountered in their elemental forms in nature.

Beryllium and radium are the first two elements in the second group of the periodic table, which is made up of the alkaline earth metals. They are all glossy, silvery-white metals with good reactivity, albeit not as good reactivity as the alkali metals.

Thus, alkaline earth metal is the components of Epsom salt ​are  magnesium sulfate and magnesium hydroxide.

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Answer:

Global temperature of earth will increase

Explanation:

green house gases will trap. the heat and it will make our atmosphere warm.

The increased level of greenhouse gases increases the temperature of the earth considerably. The Global temperatures on Earth will increase as a result of it. The correct option is B.

The process by which the radiations from the sun are absorbed by the greenhouse gases and not reflected back into the space is defined as the greenhouse effect. This insulates the surface of the earth and prevents it from freezing.

The gases which absorb the infrared radiations and cause greenhouse effect are called the greenhouse gases. Some examples are Carbon dioxide, chlorofluorocarbons, etc.

The phenomenon of gradual increase in the average temperature of the earth's atmosphere due to green house effect is called the global warming. Due to the greenhouse effect the ozone layer of the earth's atmosphere also get depleted.

Thus the correct option is B.

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Answer:

True

Explanation:

.

Answer:

H2SO4 + CaCO3 → CaSO4 + H2O + CO2 - Balanced equation | Chemical Equations online!

Na2co3 HCL nacl h2o co2

This is an acid-base reaction (neutralization): Na 2CO 3 is a base, HCl is an acid. This is a gas evolution reaction, CO 2 is the formed gas.

Answer:

Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.

Explanation:

id say physical cause your changing the physical form of the molucles

Answer:

I hope I can help

Explanation:

I hope I can help you

Balancing Chemical Formulas is like simple mathematic systems of equations

Lets look at your second example:

H2 + Cl2 = HCl

Lets replace H with x, and Cl with y.

the equation would now be

2x + 2y = xy (now I know in math x+y does not equal xy, but bear with me)

This would not be correct. For the equation to be true, both sides must yield the same counterpart. To do this, you'd have to add a coefficient to balance out both sides.

Looking at the equation, you know you have to balance the right side, as the left side is adding two things up to getting only half value. So, we will add coefficient of "2" to xy. This means that the balanced chemical equation will now be H2 + Cl2 = 2HCl

Answer:

See explanation below

Explanation:

When the bromine (Br₂) reacts in presence of FeBr₃ with the isopropylbenzene, the isopropylbenzene is a ring activator, therefore, it will promote the substitution in the ortho and para positions. However, as the Isopropyl is voluminic, the ortho position would have steric hindrance and hence, this product is not formed in greater proportions. Instead, the para position becomes more available to reaction, and this product is formed in majority.

The mechanism of reaction can be seen in the following picture, along with the products of the reaction

Hope this helps

Answer: nitrogen

Explanation:

Answer:

86

Explanation:

20 plus 9 equals 29 minus 10 equals 19 plus 67 equals 86

Answer:

86

Explanation:

20+9=29

29-10=19

19+67=86

Answer:

At < I < Br < Cl < F

Explanation:

Electronegativity is defined as the ability of an atom to attract pair of electrons. On the periodic table, electronegativity decreases down the group and increases along the period.

The given atoms belong to the same group, so following the above rule,  F has the highest electronegativity than other given atoms as it is at the top of the group and At will have the least electronegativity as it is at the bottom of the group.

Hence, the order of increasing electronegativity is

At < I < Br < Cl < F.

Answer:

[tex]\boxed {\boxed {\sf 411.9833942 \ grams \ of \ silver}}[/tex]

Explanation:

1. Convert Atoms to Moles

To convert atoms to moles, we use Avogadro's Number: 6.022*10²³. This tells us the amount of particles in 1 mole of a substance. In this case, it is atoms of silver.

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

Multiply by the given number of atoms.

[tex]2.3 *10^{24} \ atoms \ Ag*\frac {6.022*10^{23} \ atoms \ Ag}{ 1 \ mol \ Ag}[/tex]

Flip the fractions so the atoms of silver cancel.

[tex]2.3 *10^{24} \ atoms \ Ag*\frac {1 \ mol \ Ag}{ 6.022*10^{23} \ atoms \ Ag}[/tex]

[tex]2.3 *10^{24} *\frac {1 \ mol \ Ag}{ 6.022*10^{23}}[/tex]

[tex]\frac {2.3 *10^{24} \ mol \ Ag}{ 6.022*10^{23}} = 3.819329127 \ mol \ Ag[/tex]

2. Convert Moles to Grams

To convert from moles to grams, we use the molar mass. This can be found on the Periodic Table.

Use this as a fraction.

[tex]\frac { 107.868 \ g \ Ag}{ 1 \ mol \ Ag}[/tex]

Multiply by the number of moles we calculated. The moles of silver will cancel.

[tex]3.819329127 \ mol \ Ag * \frac { 107.868 \ g \ Ag}{ 1 \ mol \ Ag}[/tex]

[tex]3.819329127 \ * \frac { 107.868 \ g \ Ag}{ 1 }[/tex]

[tex]411.9833942 \ g \ Ag[/tex]

Answer:

19.8% of Nitrogen

Explanation:

In the Al(NO₃)₃ there are:

1 atom of Al

3 atoms of N

And 9 atoms of O

The molar mass of Al(NO₃)₃ is:

1 Al * (26.98g/mol) = 26.98g/mol

3 N * (14g/mol) = 42g/mol

9 O * (16g/mol) = 144g/mol

26.98 + 42 + 144 = 212.98g/mol

We can do a conversion using these molar masses to find the mass of nitrogen is the sample, that is:

2.57g * (42g/mol / 212.98g/mol) =

0.51g N

Percent composition of nitrogen is:

0.51g N / 2.57g * 100

= 19.8% of Nitrogen

Answer:

6.022x10^23

Explanation:

Avogrado's number proved that one mole is equal to 6.022x10^23.

Answer:

The amount in grams of CaO that will be produced is 2,302.67824 grams

Explanation:

The reaction between calcium and oxygen to produce calcium oxide (quicklime) can be presented as follows;

2Ca (s) + O₂ (g) → 2CaO (s)

From the above chemical equation, we have;

2 moles of calcium, Ca, react with 1 mole of oxygen gas, O₂, to produce 2 moles of CaO

With the assumption that there is an excess amount of Ca, we have;

The molar mass of O₂ = 32 g/mol

The number of moles, 'n', of O₂ in 657.0 grams of oxygen is therefore;

The number of moles of a substance =  Mass of substance/(Molar mass of substance)

∴ n = 657.0 g/(32 g/mol) = 20.53125 moles

The number of moles of O₂ in the 657.0 grams of oxygen present in the reaction, n = 20.53125 moles

1 mole of O₂ produces 2 moles of CaO, therefore, 20.53125 moles of oxygen will produce 2 × 20.53125 or 41.0625 moles of CaO

The molar mass of CaO = 56.0774 g/mol

Therefore, the mass of 41.0625 moles of CaO is given as follows;

Mass of substance = (The number of moles of a substance) × (Molar mass of substance)

The mass of CaO produced = 41.0625 moles × 56.0774 g/mol = 2,302.67824 g.

Answer:

An aquifer

Explanation:

here's your answer

Answer:

aquifer

Explanation:

solid rock that holds ground water is cold aquifer

Answer:

HCl for acid, NaOH for base.

Explanation:

Acids start with H.

Bases end with OH.

Answer:

Chemical indicator, any substance that gives a visible sign, usually by a color change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow color to an alkaline solution.

Answer:

D.

This is not a redox reaction because no electrons were transferred.

Explanation:

Because oxidation state of each element is same in reactants and products.

Answer:

mechanical digestion is the physical part of digestion

Answer:

mechanical digestion

Explanation: