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Explanation:

it would be

[tex]kc = (products) \div (reactants) \\ kc = \frac{nh3)^{2} \times (co2) \times (h2o)}{(nh4)^{2}co3 }[/tex]

this the expression however when you are working out Kc do not include nh4^2co3 as it is a solid and it's concentration remains constant so remember to remove the nh4^2co3 and usage would just have the top part to work out ok

Answer:

Blue dye spreads out quicker

Explanation:

This is because the dye gets spread out by water molecules. Warm water has faster moving water molecules than cold water.

Answer:

True

Explanation:

Gases don't have any shape or form, so they could not be definite.

Answer:

because the sun illuminates the half of the moon that's facing it leaving the other half dark

Answer: it is Not a pure substance because it consists of sodium so it would be a mixture because it contains sodium

Explanation:

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its mixture

Explanation:

phosphorus atoms has 15 electrons and 15 protons with valence 5 electron in outer shell and is highly reactive element

Answer:

Table salt, or sodium chloride (NaCl), the most common ionic compound, is soluble in water (360 g/L)

Explanation:

your answer is oxidation

Answer:

Oxidation

Explanation:

Answer:

Bonding in chemistry is known as chemical bonding which means the interaction or attraction between molecules.

Chemical bonds are of different type such as ionic, covalent, hydrogen, and metallic. Ionic bonds are formed by the transfer of valence electron from one atom to other and there is unequal distribution of electrons between two or more atoms. Ionic bonds forms two oppositely charges ions positively charged (loses electron) or negatively charged (gains electron).

Covalent bond are the strong chemical bonds that form due to equal sharing of electron pairs between atoms. They form a stable element and have stable attraction or repulsive forces.

Answer:

The correct answer is B. and C. according to me!

Answer:

A. and C.

no explanation...

Answer:

in doesn't rust which sends meatel into the drink

Explanation:

u are welcome

Answer:

Molar mass and Mass

Explanation:

The relationship between mass and number of moles is given as;

Number of moles = Mass / Molar mass

Mass = 1.6 g

Molar mass of HCl = ( 1 + 35.5 ) = 36.5 g/mol

Number of moles = 1.6 g / 36.5 g/mol

Number of moles = 0.0438 mol

Answer:(a) Potassium nitrate will begin to crystallise at about 56 °C, when its solubility is 100 g/100g water.

Explanation:

Answer:

The reaction is not balanced.

Explanation:

The reaction expression is given as:

     4NH₃   +   5O₂   →   4NO  +   5H₂O

In a balanced reaction equation, the number of atoms on both sides of the expression is the same.

Now let us investigate;

Elements                            N                          H                       O

Reactants                           4                          12                       10

Products                            4                           10                        9

We see that the number of H and O on both sides of the expression is not the same. The reaction is not balanced.

Answer:

The change in temperature for the water is 4.21 C and its final temperature is 29.21 C

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing:

5.78*10³ J= 4.186 [tex]\frac{J}{g*C}[/tex] *328 g* ΔT

Solving:

ΔT= [tex]\frac{5.78*10^{3} J }{4.186\frac{J}{g*C}*328 g}[/tex]

ΔT= 4.21 C

Being ΔT= Tfinal - Tinitial and Tinitial=25 C, then:

4.21 C= Tfinal - 25 C

4.21 C + 25 C= Tfinal

29.21 C= Tfinal

The change in temperature for the water is 4.21 C and its final temperature is 29.21 C

Answer:

Ammonium nitrate is NH4NO3

iron(II) sulfate is FeSO4

magnesium hydroxide is MG(OH)2

titanium(II) chloride is TiCI2

cobalt(III) oxide is Co2O3

potassium sulfide is K2S

Barium acetate is C4H6BaO4

magnesium bromide is MgBr2

lithium carbonate is Li2CO3

potassium permanganate is KMnO4

Answer:

The electron sets divided among two particles are not really shared similarly. For instance, while the common electron sets are shared similarly in the covalent security in Cl2, in NaCl the 3s electron is taken from the Na iota and is fused into the electronic design of the Cl molecule - and the compound is most precisely portrayed as comprising of individual Na+ and Cl− particles (ionic holding). For most covalent substances, their bond character falls between these two limits. We showed beneath, the bond extremity is a helpful idea for portraying the sharing of electrons between molecules inside a covalent bond:

A nonpolar covalent bond is one in which the electrons are shared similarly between two particles.

A polar covalent bond is one in which one iota has a more noteworthy fascination for the electrons than the other molecule. On the off chance that this overall fascination is sufficiently incredible, the bond is an ionic bond.

Explanation:

Answer:

The answer will be Constant temperature and pressure

Explanation:

Just took the test and it was correct 100%!!!

Answer:

Constant temperature and pressure

Explanation:

took the test

Answer:

Explanation:

first, you calculate the amount of O2 in moles:

98.0 ÷ 32 = 3.0625

second, the ratio if O2/C3H8 is 5 so you need to calculate O2 in moles with that:

3.0625 ÷ 5 = 0.6125

third, the amount of CO2 in moles also can be calculate by the ratio of C3H8/CO2 which is 3

0.6125 × 3 = 1.8375

then multiply CO2 in moles by its molar mass which is 44 g/mol

1.8375 × 44 = 80.85g

Answer:

Explanation:

Answer:

dry

polar

highlands

temperate marine

temperate continental

Explanation:

Answer:

answer is 0.5

Explanation:

H= 2X l =2

0=16 xl = 16

So 16+2=18

lmol of H2O → 18g

xmol of H2O →9g

:. 9÷ 18=0.5

x= 0.5

Answer:

in this also 1st option is correct because na is also a metal and metal gains electron...

Answer:

Plants using photosynthesis to produce food.

Answer:

the icecream one is not an example

Answer:

Molecules contained in a liquid evaporate from the surface area. This means that the larger the surface area, the faster the rate of evaporation. ... This means all the other factors that affect the rate of evaporation are identical. Leave the containers for one hour.

Explanation:

Answer:

Evaporation would accelerate.

Explanation:

Direct sunlight increases the thermal energy on the containers, increasing evaporation.

Answer:

The object with less mass will have a greater change in velocity

Explanation:

Answer:

the one with the smaller object mass becaise you get more force upon impact with less effort to move

Answer:

Change in energy.

Explanation:

An energy change is required to shift one state to another or do any of the other listed.

Answer:

The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. Dispersion forces are present between any two molecules (even polar molecules) when they are almost touching.

Thus PROTON movement causes partial  positive & negative charges creating

attraction will be crrt

Answer:

Alumminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+H2SO4-->Al2(SO4)+6H2O.

Explanation:

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Answer:

In the compound Pb3(PO4)2, there are 3 Pb atoms, 2 P atoms, and 8 O atoms.

Let me know if this helps!

There are 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen) are present in Pb3(PO4)2.

A compound is a combination of atoms of same or different types of an element in a fixed ratio.

In the given question Pb3(PO4)2 is a compound of lead phosphate which is made up of 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen).

Learn more about atoms here: http://brainly.com/question/6258301

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