Please help me out here please

Answer:

A molecule is a group of two or more atoms held together by chemical bonds. A compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion. All molecules are not compounds. All compounds are molecules.

Explanation:

Answer:

A

Explanation:

because the charge of Li ion is +1 well I don't know the explanation yet but I'm sure about the answer

Answer:

To describe the rate at which the isotope will decay and give off radiation.

Explanation:

Answer:

Explanation:

It is a 3s electron

Answer:

for photosynthesis to occur you need chloroplasts, light, water and carbon dioxide. hopefully that helps

Answer:

[tex]pH=12.3\\\\pOH=1.7\\[/tex]

[tex][H^+]=5x10^{-13}M[/tex]

[tex][OH^-]=0.02M[/tex]

Explanation:

Hello there!

In this case, according to the given ionization of magnesium hydroxide, it is possible for us to set up the following reaction:

[tex]Mg(OH)_2(s)\rightleftharpoons Mg^{2+}(aq)+2OH^-(aq)[/tex]

Thus, since the ionization occurs at an extent of 1/3, we can set  up the following relationship:

[tex]\frac{1}{3} =\frac{x}{[Mg(OH)_2]}[/tex]

Thus, x for this problem is:

[tex]x=\frac{[Mg(OH)_2]}{3}=\frac{0.03M}{3}\\\\x= 0.01M[/tex]

Now, according to an ICE table, we have that:

[tex][OH^-]=2x=2*0.01M=0.02M[/tex]

Therefore, we can calculate the H^+, pH and pOH now:

[tex][H^+]=\frac{1x10^{-14}}{0.02}=5x10^{-13}M[/tex]

[tex]pH=-log(5x10^{-13})=12.3\\\\pOH=14-pH=14-12.3=1.7[/tex]

Best regards!

https://www.geneva304.org/Downloads/ch%209%20key6.pd

this is what i found add an "f" at the end and search

Answer:

they are all in parts of our life and we need them each for surviving.

Explanation:

Answer:

the last one because matter is the amount of space

Answer:

The answer is 18.01528.

We assume you are converting between grams H2O and mole.

Explanation:

Answer:

Arrhenius Base

Explanation:

"NaOH is an Arrhenius base because it dissociates in water to give the hydroxide (OH-) and sodium (Na+) ions. An Arrhenius acid is therefore any substance that ionizes when it dissolves in water to give the H+, or hydrogen, ion. ... Acids provide the H+ ion; bases provide the OH- ion; and these ions combine to form water."

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Hope I Helped, Feel free to ask any questions to clarify :)

Have a great day!

More Love, More Peace, Less Hate.

    -Aadi x

Answer:

0.031moles

Explanation:

ok so it would help if I knew the marks but 1 mole = 1000L so if the volume was 31L then if you convert you will get that answer

The moles of gas at the given sample of gas is 1.7 moles.

Ideal gas equation gives idea about the behavior of gas at different condition & represented as:

PV = nRT, where

On putting all these values, we get moles as:

n = (1.2)(31) / (0.082)(256) = 37.2 / 20.9

n = 1.7 moles

Hence required moles of gas is 1.7 mole.

To know more about ideal gas equation, visit the below link:

https://brainly.com/question/555495

#SPJ2

Answer:

Its when like two pure substances are like combined into one.

Explanation:

Answer:

Materials that do not let current flow easily are called insulators.

Most nonmetal materials such as plastic, wood and rubber are insulators

You know the number of moles of Mg that react: 6 moles.

You don't know (yet) how many moles of Mg₃N₂ are produced when 6 moles of Mg react.

The coefficients of each substance in the chemical equation tells us the molar ratio between the substances. The coefficient of Mg is 3, and the coefficient of Mg₃N₂ is 1 (coefficients of 1 are implied and omitted). So, for every 3 moles of Mg that react, 1 mole of Mg₃N₂ is produced.

We can use the proportion set up in the image to calculate the number of moles of Mg₃N₂ produced. In the first fraction, the green-boxed numerator should be our known number of moles of Mg, that is, 6 moles Mg. In the second fraction, we insert our molar ratio. Since we want the product of these two fractions to have the units "moles Mg₃N₂," the numerator in the second fraction should be 1 mole Mg₃N₂ and the denominator should be 3 moles Mg.

Our setup should look like this:

[tex]\frac{\textrm{6 moles Mg}}{1} \times \frac{\textrm{1 mole }\mathrm{Mg_3N_2}}{{\textrm{3 moles Mg}}} = \textrm{2 moles }\mathrm{Mg_3N_2}.[/tex]

Indeed, 2 moles of Mg₃N₂ are produced.

Answer:

2 moles of Mg₃N₂ are produced.

Explanation:

Answer:

I would say for #1 Fiona and for #2 sexual

Explanation:

Please give brailiest

Answer:

its A hope this helps

Explanation:

Answer:

20 Liters

Explanation:

Boyles Law => ΔP ∝ 1/ΔT => P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂

P₁ = 2 atm

V₁ = 10 Liters

P₂ = 1 atm

V₂ = ?

V₂ = 2atm x 10L / 1atm = 20 Liters

Answer:

the 3rd one is the answer

Answer:

B and D

Explanation:

Bc it has more fat than the other

Answer:

The cylinder is nit on the verge of exploding.

Explanation:

Temperature= 25.0°C

The conversion of T(°C) to T(K) is shown below:

T(K) = T(°C)+ 273.15

So,

T=(25.0 + 273.15) K = 298.15 K

Volume= 4.50 L

Moles= 40.0 mol

Using ideal gas equation as:

PV  = nRT

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is gas constant having value = 0.0821 Latm/ K. mol x 298.15 K

⇔ P= 217.58 atm

Pressure limit = 500 atm .

Answer:

genetics i.e the law of heredity

Answer:Mendel proposed three laws: Law of Dominance. The Law of Segregation. Law of independent assortment.

Explanation:Gregor Johann Mendel was a scientist who is recognized as the Father and Founder of genetics. Mendel conducted many experiments on the pea plant (Pisum sativum) between 1856 and 1863. He studied the results of the experiments and deducted many observations. Thus, laws of inheritance or Mendel’s laws of inheritance came into existence. Before learning about Mendel’s laws of inheritance, it is important to understand what the experiments performed by Mendel were.

Answer:

25.8 L

Explanation:

Step 1: Write the balanced equation for the complete combustion of acetylene

C₂H₂ + 2.5 O₂ ⇒ 2 CO₂ + H₂O

Step 2: Calculate the moles corresponding to 15.0 g of C₂H₂

The molar mass of C₂H₂ is 26.04 g/mol.

15.0 g × 1 mol/26.04 g = 0.576 mol

Step 3: Calculate the moles of CO₂ produced from 0.576 moles of C₂H₂

The molar ratio of C₂H₂ to CO₂ is 1:2. The moles of CO₂ produced are 2/1 × 0.576 mol = 1.15 mol.

Step 4: Calculate the volume corresponding to 1.15 moles of CO₂

At standard temperature and pressure, 1 mole of CO₂ occupies 22.4 L.

1.15 mol × 22.4 L/1 mol = 25.8 L

Answer:C) the Catskills

Explanation:

Answer: 2KClO3 → 2KCl + 3O2

Explanation: it's the only one that was broken down into more parts than the start, the rest were simply reseperated

this one : 1 → 2

b : 1 + 1 = 2

c : xy+ wz  → wy + xz

d : qwer +tyuio → qwui + tyero

ALSO I got it right

Answer:

1.43 grams

Explanation:

Fe = 55.8 grams Fe = 1 mole Fe

2.56 • 10^-3 moles Fe / 1 • 55.8 grams Fe / 1 mole Fe = 1.43 grams Fe

Basically, you're just multiplying the molar mass of Fe (iron) by the moles of 2.56 • 10^-3 Fe, to find how many grams are in it.

2.56 • 10^-3 moles Fe = 1.43 grams Fe