How much percent of the earth is water?

Answer: mercury

Explanation: I looked up the answer to your question.

Answer:

Mercury

Explanation:

I did this question and I got it right.

Answer:

metallic bond but not completely sure

Explanation:

Answer:

Isotopes are forms of a chemical element that have the same atomic number but differ in mass. 16O → 8 protons + 8 neutrons; a “light” oxygen); The relative amounts are expressed as either 18O/16O or δ 18O Oxygen - 18 (aka 18O → 8 protons + 10 neutrons; a “heavy” oxygen).

Answer:

Homozygous dominant

Explanation:

Answer:

sulfur dichloride

Explanation:

SCl2 is the chemical formula for sulfur dichloride. This compound is made of only two elements, so it is a binary compound.

Answer:

A. Corn has changed over time due to selective breeding.

Hope this helps :)

Answer:

THE ENERGY NEEDED TO BE ADDED TO RAISE THE TEMPERATURE BY 30°C IS 145, 860 J

Explanation:

The energy needed can be calculated by using the heat formula, which is;

Heat = m c ΔT

m = mass of the hydrogen =  340 g

c = specific heat capacity of hydrogen at room temperature = 14.30 J/g°C

ΔT = change in temperature = 30°C

Heat =?

So therefore,

Heat = 340 * 14.30 * 30

Heat = 145860 J

The energy needed to be added to the hydrogen to bring the mass of 340 g to an increased temperature of 30°C is 145, 860 J or 145.86kJ

Answer:

The limiting reactant is KOH.

Explanation:

To find the limiting reactant we need to calculate the number of moles of each one:

[tex]\eta = \frac{m}{M}[/tex]

Where:

η: is the number of moles

m: is the mass

M: is the molar mass

[tex] \eta_{MnO_{2}} = \frac{100.0 g}{86.9368 g/mol} = 1.15 moles [/tex]  

[tex] \eta_{KOH} = \frac{100.0 g}{56.1056 g/mol} = 1.78 moles [/tex]  

[tex] \eta_{O_{2}} = \frac{100.0 g}{31.998 g/mol} = 3.13 moles [/tex]  

[tex] \eta_{Cl_{2}} = \frac{100.0 g}{70.9 g/mol} = 1.41 moles [/tex]  

Now, we can find the limiting reactant using the stoichiometric relation between the reactants in the reaction:

[tex]\eta_{MnO_{2}} = \frac{\eta_{MnO_{2}}}{\eta_{KOH}}*\eta_{KOH} = \frac{2}{4}*1.78 moles = 0.89 moles[/tex]

We have that between MnO₂ and KOH, the limiting reactant is KOH.

[tex]\eta_{O_{2}} = \frac{\eta_{O_{2}}}{\eta_{Cl_{2}}}*\eta_{Cl_{2}} = \frac{1}{1}*1.41 moles = 1.41 moles[/tex]

Similarly, we have that between O₂ and Cl₂, the limiting reactant is Cl₂.

Now, the limiting reactant between KOH and Cl₂ is:

[tex]\eta_{KOH} = \frac{\eta_{KOH}}{\eta_{Cl_{2}}}*\eta_{Cl_{2}} = \frac{4}{1}*1.41 moles = 5.64 moles[/tex]

Therefore, the limiting reactant is KOH.

I hope it helps you!

Answer:

KOH is the limiting reactant

Explanation:

Step 1: Data given

Mass of MnO2 = 100 grams

Mass of KOH = 100 grams

Mass of O2 = 100 grams

Mass of Cl2 = 100 grams

Molar mass of MnO2 = 86.94 g/mol

Molar mass of KOH = 56.11 g/mol

Molar mass of O2 =32.0 g/mol

Molar mass of Cl2 = 70.9 g/mol

Step 2: The balanced equation

2MnO2 + 4KOH + O2 + Cl2 → 2 KMnO4 + 2KCl + 2H2O

Step 3: Calculate moles

Moles = mass / molar mass

Moles MnO2 = 100 grams / 86.94 g/mol

Moles MnO2 =1.15 moles

Moles KOH = 100 grams / 56.11 g/mol

Moles KOH = 1.78 moles

Moles O2 = 100 grams / 32.0 g/mol

Moles O2 = 3.125 moles

Moles Cl2 = 100 grams / 70.9 g/mol

Moles Cl2 = 1.41 moles

Step 4: Calculate the limiting reactant

For 2 moles MnO2 we need 4 moles KOH and 1 mol O2 and 1 mol Cl2 to produce 2 moles KMnO4, 2 moles KCl and 2 moles H2O

KOH is the limiting reactant. It will completely be consumed (1.78 moles). The other reactants are in excess.

There will react:

MnO2: 1.78/ 2 = 0.89 moles

O2: 1.78/4 = 0.445 moles

Cl2: 1.78/4 = 0.445 moles

There wil remain:

MnO2: 1.15 - 0.89 = 0.26 moles

O2: 3.125 - 0.445 = 2.68 moles

Cl2: 1.41 - 0.445 = 0.965 moles

KOH is the limiting reactant

Answer:

5.81L

Explanation:

N1 = 1.70 moles

V1 = 3.80L

V2 = ?

N2 = 2.60 moles

Mole - volume relationship,

N1 / V1 = N2 / V2

V2 = (N2 × V1) / N1

V2 = (2.60 × 3.80) / 1.70

V2 = 9.88 / 1.70

V2 = 5.81 L

The volume of the gas is 5.81L

Answer:

it is 0.24 M

Explanation

Find the molarity of all ions in a solution that contains 0.165 moles of aluminum chloride in 820. ml solution. " Answer: [Al 3+1= 0.201 M. (CI) = 0.603M. ... 2) Find the molartiy  of each ion present after mixing 27 ml of 0.25 M HNO3 with 36 ml of ... of each ion and the mass of any precipitate when a 0.300 mole of aluminum.

Answer:

40.078 u

Explanation:

Answer:

In a displacement reaction, a more reactive metal pushes out a less reactive metal from its compound. For example, aluminium displaces iron from iron oxide.

Explanation:

Because aluminium is more reactive than iron, it displaces iron from iron(III) oxide. The aluminium removes oxygen from the iron(III) oxide: iron is reduced.

...

Hope this answer can help you. Have a nice day!

In a displacement reaction, a more reactive metal pushes out a less reactive metal from its compound. For example, aluminium displaces iron from iron oxide.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

Learn more about compound,here:

https://brainly.com/question/13516179

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Answer:

A. They are isotopes.

Explanation:

An isotope is an element with the same number of protons but different number of neutrons resulting in a varied mass number/molecular weight.

Answer: 10 times more

Explanation:

Answer:

1: 2.6billion

2: 5.2billion

3: 3.9billion

Explanation:

Edge 2021

Answer:

1     2.6billion

2    5.2billion

3    3.9billion

Answer:

The different types of storms are hailstorms, ice storms, snowstorms, thunderstorms, wind storms, hurricanes, and tornadoes.

Explanation:

Answer:

maybe talc because it is the softest type of rock

Explanation:

Answer:

The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic

Explanation:

Answer:When the pendulum reaches the very bottom of the swing, it is at its lowest point and greatest speed. This means that the pendulum has zero potential energy (with respect to its rest position) and maximum kinetic energy. This pattern continues for the rest of the swings.

Explanation: Hopes this helps make as brainliest

Answer:

7

Explanation:

Answer:

Lemon juice baking soda and vinegar

Explanation:

Answer:

B

Explanation:

sight, hearing, smell, taste and touch

Answer:

Most easiest answer..

There are 5 senses in human body.☺️

Answer:

C = 75%

Explanation:

Theoretical yield = 8.17g

Actual yield = 6.13g

To calculate the percentage yield of a compound in a reaction, we'll use the formula to calculate it

Percentage yield = (actual yield / theoretical yield) * 100

% yield = (6.13/8.17) * 100

Percentage yield = 0.7503 * 100

Percentage yield = 75.03%

Answer:

yes

Explanation: i took the test on this

Answer:

kmno4 is heated => k2mno4 + mno2 + o2

Hope this helps!

:)

Answer:

[tex]\large \boxed{\text{21.6 L}}[/tex]

Explanation:

We must do the conversions

mass of C₆H₁₂O₆ ⟶ moles of C₆H₁₂O₆ ⟶ moles of CO₂ ⟶ volume of CO₂

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:        180.16

         C₆H₁₂O₆ + 6O₂ ⟶ 6CO₂ + 6H₂O

m/g:      24.5

(a) Moles of C₆H₁₂O₆

[tex]\text{Moles of C$_{6}$H$_{12}$O}_{6} = \text{24.5 g C$_{6}$H$_{12}$O}_{6}\times \dfrac{\text{1 mol C$_{6}$H$_{12}$O}_{6}}{\text{180.16 g C$_{6}$H$_{12}$O}_{6}}\\\\= \text{0.1360 mol C$_{6}$H$_{12}$O}_{6}[/tex]

(b) Moles of CO₂

[tex]\text{Moles of CO}_{2} =\text{0.1360 mol C$_{6}$H$_{12}$O}_{6} \times \dfrac{\text{6 mol CO}_{2}}{\text{1 mol C$_{6}$H$_{12}$O}_{6}} = \text{0.8159 mol CO}_{2}[/tex]

(c) Volume of CO₂

We can use the Ideal Gas Law.

pV = nRT

Data:

p = 0.960 atm

n = 0.8159 mol

T = 37  °C

(i) Convert the temperature to kelvins

T = (37 + 273.15) K= 310.15 K

(ii) Calculate the volume

[tex]\begin{array}{rcl}pV &=& nRT\\\text{0.960 atm} \times V & = & \text{0.8159 mol} \times \text{0.082 06 L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{310.15 K}\\0.960V & = & \text{20.77 L}\\V & = & \textbf{21.6 L} \\\end{array}\\\text{The volume of carbon dioxide is $\large \boxed{\textbf{21.6 L}}$}[/tex]

Answer:

MRCORRECT has answered the question

Explanation:

13 electrons

So... for the element of ALUMINUM, you already know that the atomic number tells you the number of electrons. That means there are 13 electrons in a aluminum atom. you can see there are two electrons in shell one, eight in shell two, and three in shell three.

7 electrons

So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

Answer:

1.5 mol H2O

Explanation:

Limiting reactant was C2H6 - 0.5 moles

Fomula became .5C2H6 + 1.75O2 = 1CO2 + 1.5H2O