Kendra and Jordan gather firewood. The wood is cool to the touch, but the campfire they make warms their hands. Which statement about this situation is true?

A. The chemical energy in the wood and the oxygen is less than the thermal and light energy released.
B. The chemical energy in the wood and the oxygen equals the thermal and light energy released.
C. The process of burning creates energy.
D. Energy is conserved in all chemical changes except burning.

Answer:

español

Un elemento del grupo 3 es un elemento situado dentro de la tabla periódica en el grupo 3. Los átomos de estos elementos tienen gran tendencia a oxidarse y son muy reactivos, predominando el estado de oxidación +3. Presentan propiedades muy similares al aluminio. Dan lugar a iones incoloros.

ingles

An element of group 3 is an element located within the periodic table in group 3. The atoms of these elements have a great tendency to oxidize and are very reactive, with the +3 oxidation state predominant. They have properties very similar to aluminum. They give rise to colorless ions.

Explanation:

ingles

Group -> 3

Group -> 3Period

Group -> 3Period4 21

Group -> 3Period4 21Sc

Group -> 3Period4 21Sc5 39

Group -> 3Period4 21Sc5 39Y

Group -> 3Period4 21Sc5 39Y6 57

Group -> 3Period4 21Sc5 39Y6 57The

Group -> 3Period4 21Sc5 39Y6 57The7 89

Group -> 3Period4 21Sc5 39Y6 57The7 89Ac

español

Grupo -> 3

Grupo -> 3Periodo

Grupo -> 3Periodo4 21

Grupo -> 3Periodo4 21Sc

Grupo -> 3Periodo4 21Sc5 39

Grupo -> 3Periodo4 21Sc5 39Y

Grupo -> 3Periodo4 21Sc5 39Y6 57

Grupo -> 3Periodo4 21Sc5 39Y6 57La

Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89

Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89Ac

endpointVinegar is also called as acetic acid, and we can write it in the following way CH3COOH. When we talk about titration, it refers to the amount of base needed to neutralize the acid. So there is a chemical reaction involved. The reaction between vinegar and NaOH base is as follows:

We have a 1 to 1 ratio, i.e. to neutralize x moles of vinegar we need the same moles of NaOH. Let's calculate how many moles of acid are believed to be in the solution. We will use the molarity = 0.78M = 0.78 mol/L.

Then we need 0.016 moles of NaOH, the volume required will be:

So, the volume that would be needed of NaOH to see an end point is 17.23 mL

Answer:the positive ionic radius is smaller than the neutral atomic radius

Explanation:

Answer:The positive ionic radius is smaller than the neutral atomic radius.

Explanation: just took the test

Chlorine-based cleansers, quaternary ammonium, peroxyacetic acid, and iodine sanitizers are all included in the statement.

a substance or object intended to reduce or remove hazardous components (like bacteria) from surfaces. Beginning in September, sales of hand sanitizers with alcohol remained about 17percent on average higher then they were at the exact time last year.

However, antimicrobials with 60 and 95% methanol are suitable in general. The Center for Prevention and Control recommends formulas that contain 75% isopropyl alcohol and 80% (percent amount) ethanol.

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Answer: 8000

Explanation:

Answer:

Sulfur would gain electrons

Explanation:

Atoms want to have a complete out valence shell and because sulfur only needs 2 more electrons to complete the outer shell it would take 2 more.

The velocity of an object is 10 m/s and its momentum is 50 kgm/s, so the mass of the object will be 5 kg.

Mass is a quantity of matter. It can be calculated by multiplying the volume of the object by its density.

Momentum is the product of mass x velocity for a body. So, if you know the momentum and the velocity, just divide!

P = m x v

Where p = momentum

m = mass

v = velocity

m = v / P

The velocity is 10 m/s

The momentum is 50 kgm/s

mass?

Putting the value in the equation

m = 10 / 50 = 5 kg

Thus, the mass of the object is 5 kg.

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Answer:

Melting point

Explanation:

Melting point is a intensive property and Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.

IF IT WAS HELPFUL HIT THE CROWN

Answer:

Explanation:

Yes melting point!

Hey there mate ;)

Question: Write ionic equation

. HCl(aq) + KOH(aq) → KCl(aq) + H2O(l)

Answer:-

The ionic equation is-

K+ + OH- + H+ + Cl- = H2O + K+ + Cl-

Answer:

Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). The noble gases are colourless, odourless, tasteless, nonflammable gases. They traditionally have been labeled Group 0 in the periodic table because for decades after their discovery it was believed that they could not bond to other atoms; that is, that their atoms could not combine with those of other elements to form chemical compounds. Their electronic structures and the finding that some of them do indeed form compounds has led to the more appropriate designation, Group 18.

interactive periodic table

Answer:

5.46x\(10^{8}\)

Explanation:

just move the decimal however many places to the left until there is only one digit to the left of it and then square the ten by that number

The molecular formula of butadiene can be determined using the empirical formula and the molar mass. The empirical formula of butadiene is C2H3, which represents the simplest ratio of the atoms present in the compound.

To find the molecular formula, we need to determine the actual number of atoms in one molecule of butadiene. To do this, we compare the molar mass of butadiene with the empirical formula mass. The empirical formula mass of C2H3 can be calculated as follows: (2 * Atomic mass of carbon) + (3 * Atomic mass of hydrogen)
Using the atomic masses of carbon (12.01 g/mol) and hydrogen (1.01 g/mol), the empirical formula mass of C2H3 is:
(2 * 12.01 g/mol) + (3 * 1.01 g/mol) = 26.05 g/mol
The molar mass of butadiene is given as 54 g/mol.
To find the molecular formula, we divide the molar mass by the empirical formula mass:
54 g/mol / 26.05 g/mol = 2.07
The result, 2.07, is approximately 2. This means that the molecular formula of butadiene is approximately two times the empirical formula.
Therefore, the molecular formula of butadiene is (C2H3)2, which can be written as C4H6. The empirical formula of butadiene, C2H3, represents the simplest ratio of the atoms present in the compound. However, it doesn't provide information about the actual number of atoms in one molecule of butadiene.

To determine the molecular formula, we need to compare the molar mass of butadiene with the empirical formula mass. The empirical formula mass can be calculated by multiplying the atomic masses of each element in the empirical formula by the number of atoms present and summing them up. In this case, the empirical formula mass of C2H3 is calculated as follows:
(2 * Atomic mass of carbon) + (3 * Atomic mass of hydrogen)
Using the atomic masses of carbon (12.01 g/mol) and hydrogen (1.01 g/mol), the empirical formula mass of C2H3 is:
(2 * 12.01 g/mol) + (3 * 1.01 g/mol) = 26.05 g/mol
The molar mass of butadiene is given as 54 g/mol.
To find the molecular formula, we divide the molar mass by the empirical formula mass:
54 g/mol / 26.05 g/mol = 2.07
The result, 2.07, is approximately 2. This means that the molecular formula of butadiene is approximately two times the empirical formula.
Therefore, the molecular formula of butadiene is (C2H3)2, which can be written as C4H6.

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To determine the dealer's cost for the new sedan that Paula Demaline is interested in purchasing, we need to calculate two separate costs: the cost of the base price and the cost of the options.

Firstly, to calculate the cost of the base price, we multiply the base price of $37,580 by the dealer's cost of 91.5% (or 0.915).
Dealer's cost for the base price = $37,580 x 0.915 = $34,412.70
Next, to calculate the cost of the options, we multiply the total cost of the options ($2,365) by the dealer's cost of 89.5% (or 0.895).
Dealer's cost for the options = $2,365 x 0.895 = $2,117.68
Finally, we can calculate the total dealer's cost for the car by adding the cost of the base price and the cost of the options, and then adding the destination charge of $680.
Total dealer's cost = $34,412.70 + $2,117.68 + $680 = $37,210.38

Therefore, the dealer's cost for the new sedan that Paula Demaline is interested in purchasing is $37,210.38.

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Answer:

The ability of a base to react with a soluble metal salt

Explanation:

The equation is given as;

CuSO4(aq) + NaOH →  Cu(OH)2(s) + Na2SO4(aq)

A strong base (NaOH) can easily react with a soluble metal salt (CuSO4) and displace it.

The reaction between CuSO4 and NaOH is a double displacement reaction.

Answer:

The ability of a base to react with a soluble metal salt

Explanation:

Explanation:

The Sun is a as a G2V type star, a yellow dwarf and a main sequence star. Stars are classified by their spectra (the elements that they absorb) and their temperature.

whish this helped!

Answer: an iceberg

Explanation: the reason for this is because it has much more mass then a hot cup of coffee even the the temputure of coffee is much warmer

Nick can explain to his daughter Layla that the sun left the sky and turned it dark because of a natural process called the day-night cycle.

The Earth rotates on its axis, and as it does so, different parts of the world face the sun, experiencing daylight. When the Earth continues to rotate and their location faces away from the sun, they experience night, and the sky turns dark. The best explanation for why the sky is now dark is that it is nighttime, and their part of the Earth is not facing the sun.

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The rate of formation of hydrogen gas is:

2Al (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H2 (g).

According to the reaction,

2mol Al can produce 3mol \(H_2\)

0.08mol Al = \(\frac{3*0.08}{2}mol H_2\)

\(= 0.12mol H_2\)

so we can say,

in 20s, 0.12mol H_2 will be produced

The rate of formation of \(H_2\) = \(\frac{mol of H_2 formed}{time taken to form}\)

\(= \frac{0.12}{20}\\\\= 0.006mol/s\)

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The molar mass of Br is 79.904 grams/mole and the molar mass of Cl is 35.453 grams/mole.

There are 3 Cl atoms so we'll multiply it's molar mass by 3. So:

35.453 x 3 = 106.359

Now we add this number to the molar mass of Br and we get:

106.359 + 79.904 = 186.263

The molar mass of BrCl3 is 186.263 grams/mole

Now we just multiply this number by the amount of moles in the question which is 204.

186.263 x 204 = 37997.652 g which is 37.997652 kg or 38.0 kg if significant figures are important.

Answer:

Daffodils are the most carefree of all spring flowers. ... Daffodil flowers come in many different shapes, sizes, and color combinations. The American Daffodil Society classifies daffodils by their flower shape, and there are officially 13 different classifications.

Explanation:

the small one: they grow from fall-planted bulbs and bloom in spring. The size of a dwarf daffodil depends on the variety, but generally, they grow 4 to 6 inches (10 to 15 cm.)

and i can't find the medium size, sorry

hope it helps

To assign formal charges to the atoms in a Lewis structure, you need to count the number of electrons around each atom and compare it to the number of electrons it would have in an isolated (neutral) atom of the same element.

In the hydrogen cyanide (HCN) molecule, nitrogen (N) is the central atom and has five electrons in its valence shell. Hydrogen (H) atoms each have one electron in their valence shell. To form a stable Lewis structure, N must have an octet of electrons (eight electrons in its valence shell), so it must share electrons with the hydrogen atoms.

Here's the calculation for each atom:

Nitrogen: In an isolated N atom, there would be 5 electrons in its valence shell. In the HCN molecule, N has 5 shared electrons and 8 electrons in total, giving it a formal charge of 0.

Hydrogen: In an isolated H atom, there would be 1 electron in its valence shell. In the HCN molecule, each H has 1 shared electron, giving it a formal charge of 0.

So, the Lewis structure of HCN has formal charges of 0 on all atoms, which means it is a neutral species

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An investigation into an unknown object in space resulted in the following observations: It was discovered to be an asteroid, It revolves around the sun, which is in the third position.

It is a small, rocky substance that rotates around the sun and is found in the asteroid belt, which is located between the orbits of Mars and Jupiter, and its size varies, with some still in fragments and others having a large structure.

Hence, an investigation into an unknown object in space resulted in the following observations: It was discovered to be an asteroid, It revolves around the sun, which is in the third position.

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Answer:

atomic number

Explanation:

atomic number is the number of protons

Answer:

Hydrogen bonds

Explanation:

The weak attractive forces that hold water molecules together are called hydrogen bonds.

Answer:

57

Explanation:

a mass number is protons plus neutrons so we add them

30+27

57

Hopes this helps please mark brainliest

Answer:

57

Explanation:

the other guy is right

The question's reaction is represented by the chemical equation NH3(g) + CH4(g) 3H2(g) + HCN (g).

Ammonia is created through an exothermic process. When the temperature rises, the reaction changes direction in order to cancel out the effect of the rise in temperature.

Fuel is oxidised in this reaction by combining with oxygen, which releases energy (often in the form of light and heat) as well as the creation of carbon dioxide and water (H 2 O). Consider this: Carbon dioxide is produced as a result of methane and oxygen reacting.

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When the pool's center is occupied by the rubber raft. Think of it as the raft's starting position.

Once it reaches the rubber raft, the raft will start to rise when the friend creates a wave by slapping the water.

The raft will really gain energy from the wave, moving upward.

The raft will return to its original place once the wave passes.

The raft will return to its original place where it was before the wave hits it because it is indicated in the question that it is immobile.

As a result, the wave won't take it to the pool's edge.

Because you are only lightly lifted by the waves or because Lee cannot be pushed to the other side of the pool, the wave won't drive the person on the raft over the edge of the pool.

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