HELP ME ASAPPP plsss

Answer:

C. seems to be the answer as ionic comlopunds have high melting points becuase of the anion cation bond which is not seen in covalent bonds that share electrons in polar arragnements.

Explanation:

Answer:

I think is B hopefully is

Answer:

This lifespan began roughly 4.6 billion years ago, and will continue for about another 4.5 – 5.5 billion years, when it will deplete its supply of hydrogen, helium, and collapse into a white dwarf.

Explanation:

Got this from the internet lol

Answer:

the answer is B

Explanation:

Answer:

See explanation

Explanation:

When we are writing chemical reaction equations, we must ensure that such equations are balanced. That is, the number of atoms of each element on both sides of the reaction equation are exactly the same.

After we identify the formula of each compound in the reaction, then we proceed the write the balanced reaction equation as follows;

CuCl2 + 2AgNO3 -------> Cu(NO3)2  + 2AgCl

Answer:

iron (III) oxide is a gas

Answer: helium nucleus

Answer:

pOH = 1.3, pH = 12.7

Explanation:

Since NaOH is a strong base, it will completely ionize; further, since it completely ionizes, our hydroxide concentration (a product of the ionization) will be the same as the given concentration of NaOH.

NaOH -> Na⁺ + OH⁻, [OH⁻] = 5.0 x 10^-2 M

pOH is the negative log of the hydroxide concentration, so plug our hydroxide concentration in:

pOH = -log[OH⁻] = -log[5.0 x 10^-2 M] = 1.3

Since pH + pOH = 14, we can plug in pOH and solve for pH:

pH + 1.3 = 14

pH = 14 - 1.3 = 12.7

Thus, our pOH = 1.3 and pH = 12.7.

Answer:

C

Explanation:

Mostly all of them but most likely C

Answer:

Eukaryotes

Explanation:

Answer:

The rollercoaster has the lowest kinetic energy at the top of the hill.

The rollercaoster has the highest kinetic energy at the bottom of the hill.

Explanation:

The kinetic energy of any solid body in motion is usually computed using this formula:

K.E = [tex]\frac{1}{2}mv^2[/tex]

From this, we can see that it varies based on two major parameters - The mass of the moving object and the velocity of the moving object.

We can assume that the mass of the rollercoaster is constant since no one gets off and it does not shrink in its size during the ride.

This means that the variations in the K.E are mainly coming from its velocity.

At the top of the hill, the rollercoaster is moving at its slowest pace. hence, it has the lowest kinetic energy at the top of the hill.

However, at the bottom of the hill, the rollercoaster is moving its fastest, hence it has the highest kinetic energy at the bottom of the hill.

Answer:

what is your question sorry cause I don't trust hope you understandanymore feel free tell me your question you are struggling with l be glad to help you

Answer:

4.

A. Alkali

B. Alkaline

C. Transition

5. True (it is extremely powerful especially when reacting with water)

Explanation:

Answer:

15900

Explanation:

I think hope this helps!! :D

Answer:

15900

Explanation:

Answer:

C

Explanation:

Same reason as the answer before mine, but the answer to your questionaire is C.

Answer:

0.67moles

Explanation:

The balanced equation of the chemical reaction given in this question is:

N2 + 3H2 → 2NH3

According to this equation, 3 moles of hydrogen gas (H2) produces 2 moles of ammonia gas (NH3)

Therefore, 1 mole of hydrogen gas (H2) will produce;

= 1 × 2/3

= 2/3

= 0.6666

= 0.67moles of ammonia (NH3)

Answer: you can find out information about Wheatstone bridge.

Explanation: maybe resistors are adjusted such a way that current through

Galvanometer is zero. There is no picture.

Answer:

mmh maybe the connections arent right

Explanation:

coz when u mess up even a bit current wont flow

Answer:

see explanation and punch in the numbers yourself ( will be better for your test)

Explanation:

If you are given atoms you need to divide by Avogadro's number 6.022x10^23

then you will have moles of sulfur-- once you have moles multiply by the molar mass of sulfur to go from moles to grams

mm of sulfur is 32 g/mol

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the grams of sulfur in  1.9x10²³ atoms of sulfur is 9.92g.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance.

Given number of atoms= 1.9x10²³atoms

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

mole =given number of atoms ÷ 6.022×10²³(Avogadro number)

Substituting the values

mole=1.9x10²³÷ 6.022×10²³

mole = 0.31 mole of sulfur

Mole = given mass÷ Molar mass

Molar mass of sulfur=32g/mol

mass of sulfur =0.31 mole ×32g/mol

mass of sulfur=9.92g

Therefore, the grams of sulfur in  1.9x10²³ atoms of sulfur is 9.92g.

To know more about mole, here:

https://brainly.com/question/15209553

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Answer:

I think C But I can't really see it well

In the balanced equation, the mass of reactant is exactly equal to the mass of product. The respective coefficients needed to balance the equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.

Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.

The Law of Conservation of Mass is followed by a balanced equation. This is a crucial scientific guiding principle. Finally, a balanced equation enables us to forecast the quantity of reactants and products that will be produced. Sort of crucial if you're attempting to determine how much fuel to supply a spacecraft traveling to Mars

Thus, the balanced equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

To learn more about balanced equation, follow the link;

https://brainly.com/question/7181548

#SPJ2

Answer:

The charge will tell you if the atom is neutral, positive, or negative. "The charge of an atom is the number of protons minus the number of electrons."

Answer:

Acids and bases aqueous solutions will conduct electricity because they contain dissolved ions. Therefore acids and bases are electrolytes. strong acids and bases will be electrolytes. weak acids and bases will be weak electrolytes.

Answer:

I would say 17.25.

Explanation:

Answer:

it means 2 oxygen atoms in the molecule

Explanation:

Answer:

Sand and silt can be carried in suspension.

Explanation:

For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification.

Answer:  Boron

Explanation: lol

Answer:

Boron. (What kind of name is that?????????????)

Explanation:

Answer:

answer is

c. Polar

hope this helps