Suppose you spill a few drops of sulfuric acid solution on your sleeve, but there is no visible harm. Can you be confident the fabric is safe

Answer:

A

Explanation:

add 22 with the answers like A, 33+22=55

Answer:

V1/T1 = V2/T2 (Charles' Law)

T is in Kelvin. Celsius temp plus 273.15 = K

T1 = 14 +273

= 287 K

T2 = 29 + 273

= 303 K

4.5 / 287 = V2 / 303

V2 = 4.75 L

= 4.8 L

Answer:

a

Explanation:

one is Na other is Cl

Answer:

A. To study the chemical composition of the surface of a planet

Explanation:

Strictly speaking, a spectrometer is any instrument used to view and analyze a range (or a spectrum) of a given characteristic for a substance (for example, a range of mass-to-charge values as in mass spectrometry), or a range of wavelengths as in absorption spectrometry like nuclear magnetic radiation spectroscopy

-hope this helps!

Answer:

9.7 × 10² g NaF.

Explanation:

Molarity is defined by the amount of solute (mols) over the volume of solution (liters):

[tex]\displaystyle \text{Molarity} = \frac{\text{mols solute}}{\text{L solution}}[/tex]

We want to create 6.3 liters of a 3.6 molar solution of NaF.

Solve for the amount of NaF necessary:
[tex]\displaystyle \begin{aligned} (3.6\text{ M}) & = \frac{\text{ mol NaF}}{6.3\text{ L}} \\ \\ \text{mol NaF} & = 23 \text{ mol}\end{aligned}[/tex]

Therefore, about 23 moles of NaF is required.

Convert from moles to grams. The molecular weight of NaF is 41.99 g/mol:
[tex]\displaystyle 23\text{ mol NaF} \cdot \frac{41.99\text{ g NaF}}{1\text{ mol NaF}} = 9.7\times 10^2\text{ g NaF}[/tex]

Therefore, about 970 grams of NaF is needed to create the solution.

Answer:

Brainliest pls

Explanation:

Although the information for the trial was not given, we can offer a summed-up reply in that while playing out an analysis to accomplish outright zero temperatures, the worth won't ever match the specific worth.

What is absolute zero?

Absolute zero is the lower furthest reaches of temperature. Considered the coldest conceivable temperature that can exist. Nonetheless, any endeavor to arrive at this temperature in a controlled climate has fizzled, researchers don't think reproducing this temperature is conceivable.

In this way, we can affirm that the worth of indisputably the zero tests didn't match the acknowledged worth. Assuming the speculation was that it would be troublesome or difficult to accomplish, then the information would uphold the theory, if not, it would neglect to do as such.

In outline, outright zero is a temperature that can't be reproduced in a lab, so the worth in this analysis doesn't match the acknowledged worth and there could be no further investigation to be done on this.

The proper way to balancing the given equation is 3Ca(OH)₂+2H₃PO₄→Ca₃(PO₄)₂ +6H₂O

Balanced equations are those reactions in which each atom of reactants and products are present in same quantity on both sides of the equation.

Given chemical reaction is:
Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + H₂O

Let we discuss each given reaction to get the perfectly balanced equation:

In the above reaction number of hydrogens, calcium as well as of oxygens are not equal so that it is an unbalanced equation.

In the above equation all atoms are present in equal amount on both sides of the reaction, so that it is a balanced equation.

In the above reaction number of oxygen and hydrogen atoms are not equal so that the given equation is an unbalanced one.

In the above freaction all atoms are unequal so that given equation is an unbalanced equation.

Hence balanced equation is 3Ca(OH)₂ + 2H₃PO₄ → Ca₃(PO₄)₂ + 6H₂O.

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The oxidation number for sulphur (S) in the given compound sulphur trioxide (SO₃) is +6.

Oxidation number of any element is define as the number of exchangeable electrons from the outermost shell of an element.

For the given compound SO₃ no charge is present on the whole molecule and oxidation state of oxygen atom is -2, and let we assume that the oxidation state of sulphur atom is x and we calculate for x as:

x + 3(-2) = 0

x - 6 = 0

x = +6

Hence the oxidation state of atom is +6.

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The answer is D: 6+

Worked for me on EDGE 2023

We need M2

Answer:

See below ↓↓↓↓

Explanation:

1)

a)

b)

c)

d)

Answer: In a mixture, substances are generally just mixed and are not completely dissolved. In a solution, substances are dissolved completely and they cannot be filtered out.

Explanation:

As the combustible materials burn, some of the chemical energy is transformed into heat energy, and some are transformed into light energy. Light energy, also known as radiation or electromagnetic energy, is a type of kinetic energy that takes the form of visible light waves, such as the light from a match.

In system A: A gas and a solid react to form a new solid product. The system entropy decreases.

In System B: Rubbing alcohol evaporates on the skin. Liquid alcohol is converted to gas by evaporation. So the system entropy increases.

Entropy is a thermodynamic quantity measure the degree of disorder of a certain system.

Gases have larger entropy compared to liquids and which is larger than solids.

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#SPJ1

Answer:

System A: The entropy decreases due to the solid having fewer moving particles than the gas .

System B: There is an increase in entropy. The change in the state of a liquid to a gas is an increase in entropy (disorder) because the particles of a gas are moving faster and forming more random arrangements than they are in the more condensed liquid state.

Explanation:

Answer:

usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.

Explanation:

please consider as brainlest if i helped you

usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.

Answer:

Vertebrates: both birds and mammals are vertebrates, which means that they have backbones.

Explanation:

Answer:

2Fe+3H20=Fe203+3H2

Explanation:

Based on temperature changes, the phase changes that occur in water is from a solid at A to a liquid at B, and from liquid a B to gas at C.

Change of state is the process whereby a substance changes its state of matter from one form to another as as result of heat changes.

In the graph shown above, water exists in three states at different points.

Therefore, the phase changes that occur in water is from a solid at A to a liquid at B, and from liquid a B to gas at C.

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Answer: is the chemical compound that contains one oxygen atom and one other element in it chemical formular

Explanation:

Oxide - is a binary compound of oxygen with a more electropositive element or group

Hope this helps :))

Answer: Heyo Kenji Here! Here's your answer- In addition, since the external battery source is what drives the electrons through the circuit, the electrodes will match the positive and negative terminal of the battery. While the anode remains the site of oxidation, it becomes the positive terminal, and the cathode becomes the negative terminal.

Explanation: Hope this helps!

Have a nice day!
- Kenji ^^

Answer: In a galvanic (voltaic) cell, the anode is considered negative and the cathode is considered positive. This seems reasonable as the anode is the source of electrons and cathode is where the electrons flow. However, in an electrolytic cell, the anode is taken to be positive while the cathode is now negative.

Explanation: I hope this helps!

Answer:

[Sr2+][CO32-]

Explanation:

When this compound dissolves in water, it breaks up into Sr cations and CO3 anions. Due to the fact that the element Sr lies in group 2, and is a cation, we know that it can be represented by the expression - [Sr2+]. From this we can come up with the following expression for CO3 - [CO32-].

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We calculate as follows:

2.30 g NH3 (1 mol / 17.03 g ) (6.022 x 10^23 molecules / 1 mol ) = 8.13x10^22 molecules

Answer:

Explanation: current= watts divided by voltage= 75/120= 0.625 amperes.Jan 14, 2017

Answer:

i do not know sorry i such at this hope you find the answer.

ratio = 1 : 1

the number of atoms can be 1: 1, 2:2, 3:3 etc

5 micrograms then 5 milligrams than 5 g then 5 kg

Answer:A solar flare is an intense burst of radiation coming from the release of magnetic energy associated with sunspots. Flares are our solar 

Explanation:

Answer:

Water and Salts

Explanation:

Because a neutralization reaction, which results in the formation of salt and water, occurs when an acid and a base react with one another. The H + ions from the acid and the OH - ions from the base combine to form water. As a result of the reaction, a solution with a neutral pH (pH = 7) is produced as the strong acids and strong bases completely dissociate.

Answer:

2.28 atm

Explanation:

According to Dalton's law of partial pressures the total pressure is equal to the sum of all of the partial pressures. Basically, just add the individual partial pressures to get the total pressure.

1.00+.29+.99=2.28atm total pressure