is nitride on the periodic table

Answer:

A-L

Explanation:

Since before the change, the substance is described as having atoms "close together" and "cannot slide past one another", one can assume this is a solid, since in both liquids and gases, the atoms can move around more or less freely.

Then, it explains that the new substance "can fill a container", which is a property of both a liquid and a gas.

Thus, the answer would be either P, solid to liquid, or L, solid to gas.

Since P is not an option you can choose, by process of elimination, that leaves L, or option A.

Have a nice day! ^-^

Answer:

A-L

Explanation:

i took the test

hope this helps

Answer:

Radio Waves have the lowest frequency but the highest

Explanation:

From the acronym GUX = VIR

Wavelength, deviation, and refractive index increases to the right

but frquency increases to the left

Answer: 6751 L

Explanation:

1000 mL = 1 L

so dividing 6751 by 1000 gives .6751 L

Answer:

Approximately [tex]64\%[/tex].

Explanation:

[tex]\displaystyle \text{Percentage Yield} = \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\%[/tex]

The actual yield of [tex]\rm O_2[/tex] was given. The theoretical yield needs to be calculated from the quantity of the reactant.

Balance the equation for the hydrolysis of water:

[tex]\rm 2\, H_2O \, (l) \to 2\, H_2\, (g) + O_2\, (g)[/tex].

Note the ratio between the coefficient of [tex]\rm H_2O\, (g)[/tex] and [tex]\rm O_2\, (g)[/tex]:

[tex]\displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} = \frac{1}{2}[/tex].

This ratio will be useful for finding the theoretical yield of [tex]\rm O_2\, (g)[/tex].

Look up the relative atomic mass of hydrogen and oxygen on a modern periodic table.

Calculate the formula mass of [tex]\rm H_2O[/tex] and [tex]\rm O_2[/tex]:

[tex]M(\mathrm{H_2O}) =2\times 1.008 + 15.999 = 18.015\; \rm g \cdot mol^{-1}[/tex].

[tex]M(\mathrm{O_2}) =2\times 15.999 = 31.998\; \rm g \cdot mol^{-1}[/tex].

Calculate the number of moles of molecules in [tex]9.8\; \rm g[/tex] of [tex]\rm H_2O[/tex]:

[tex]\displaystyle n(\mathrm{H_2O}) = \frac{m(\mathrm{H_2O})}{M(\mathrm{H_2O})} = \frac{9.8\; \rm g}{18.015\; \rm g \cdot mol^{-1}} \approx 0.543991\;\rm g \cdot mol^{-1}[/tex].

Make use of the ratio [tex]\displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} = \frac{1}{2}[/tex] to find the theoretical yield of [tex]\rm O_2[/tex] (in terms of number of moles of molecules.)

[tex]\begin{aligned} n(\mathrm{O_2}) &= \displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} \cdot n(\mathrm{H_2O}) \\ &\approx \frac{1}{2} \times 0.543991\; \rm mol \approx 0.271996\; \rm mol \end{aligned}[/tex].

Calculate the mass of that approximately [tex]0.271996\; \rm mol[/tex] of [tex]\rm O_2[/tex] (theoretical yield.)

[tex]\begin{aligned}m(\mathrm{O_2}) &= n(\mathrm{O_2}) \cdot M(\mathrm{O_2}) \\ &\approx 0.271996\; \rm mol \times 31.998\; \rm g \cdot mol^{-1} \approx 8.70331 \; \rm g \end{aligned}[/tex].

That would correspond to the theoretical yield of [tex]\rm O_2[/tex] (in term of the mass of the product.)

Given that the actual yield is [tex]5.6\; \rm g[/tex], calculate the percentage yield:

[tex]\begin{aligned}\text{Percentage Yield} &= \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\% \\ &\approx \frac{5.6\; \rm g}{8.70331\; \rm g} \times 100\% \approx 64\%\end{aligned}[/tex].

Answer:

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

The He or helium is a smallest element and the Fr or the francium is largest.

The atomic radius is a chemical element and is a measure of the atomic size. It typical distance from the center of the nucleus is bounded by the electron shells.  

The atomic radii can vary on basis of the periodic table. Hence can be seen as the radius increases from top to the bottom in a group, and then decreases from left to the right across a period.

Find out more information about the atomic radius.

brainly.com/question/1445177.

Answer/Explanation:

Part 1 and 3: Test tube 4. The hot water and Acid added to the substance makes it much more reactive, which is the reason why the new substance is bubbling. Hot water allows the particles in a chemical reaction have enough force and more chances to go through actual reaction process. This also caused it to create the most bubbles.

Part 2 and 4: Test tube 1 had the least amount of chemical reactivity. Cold water slows down the amount of times a particle in the substance hits another. This reduces the chance of it reacting and the strength of it's reaction. Test tube 1 was also missing the citric acid. Since acids have low pH it is very reactive with other particles with substances that contain less than 8 valence electrons. Without the acid it doesn't have ad much urge to react with. The lower the pH the better reactivity.

Answer:

1 g

Explanation:

Given data:

Volume of solution = 250 mL (250 mL × 1 L/1000 mL = 0.25 L)

Molarity of solution = 0.1 M

Amount of sodium hydroxide = ?

Solution:

Molarity = number of moles / volume in L

0.1 M = number of moles /0.25 L

Number of moles = 0.1 M × 0.25 L

            M = mol/ L

Number of moles = 0.025 mol

Mass of sodium hydroxide:

Mass = number of moles × molar mass

Mass = 0.025 mol ×40 g/mol

Mass = 1 g

Answer:

Small streams that flow into larger streams and wetlands

Explanation:

Hope this helps, have a great day (;

Answer:

D

Explanation:

verifyed got me the answer!

Answer:

B) Because modern corals live in warm, shallow seas, we can infer the same

environment existed during the Devonian period, where the Kimberleys are

today

Explanation:

Based on the law of Uniformitarianism we can infer the environment that existed during the formation of the Devonian limestone and the Barrier Reef today.

Answer: B

Explanation: USA test prep, K12

Answer:

The answer options provided are incorrect. The correct answer is 0.009g

Explanation:

Using PV = nRT

Where;

P = pressure (atm)

V = volume (L)

R = gas constant (0.0821 Latm/Kmol)

T = temperature (K)

n = number of moles

Based in the information provided;

V = 107mL = 107/1000 = 0.107L

P = 104.8kPa = 104800 Pa = 1.03atm

T = 30°C + 273.15 = 303.15K

PV = nRT

1.03 × 0.107 = n × 0.0821 × 303.15

0.1102 = 24.89n

n = 0.1102/24.89

n = 0.0044 mol

mole = mass/molar mass

Molar mass of H2 = 2g/mol

mass = molar mass × mole

mass = 2 × 0.0044

mass = 0.0088

mass = 0.009g

Answer:

Here is your answer

Explanation:

Mg and sr

Answer:

it will float back up because it's not dense enough to go down

Answer:

Sodium + Water = Sodium Hydroxide + Dihydrogen

Explanation:

eaction of sodium with water

Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.

Answer:

Atomic number is the number of protons in an isotope or element.

Explanation: The atomic number is the same number of protons in an element or isotope and if said isotope is neutral than it is the same number of electrons.

Example: Atomic number = 19 Protons = 19 if neutral Electrons = 19

Answer:

12 individuals are born 10 individuals emigrate, 4 individuals die, 14 individuals immigrate, 0 individuals are born

Explanation:

From the formula:

Population growth = (birth rate + immigration) – (death rate + emigration)

                       = (b + i) - (d + e)

For the first option, b = 12, i = 0, d = 12, e = 12

population growth = (12+0) - (12+12) = -12

For the second option: b = 13, i = 0, d = 3, e = 16

population growth = (13+0) - (3+16) = -6

For the third option: b = 12, i = 20, d = 0, e = 8

population growth = (12+20) - (0+8) = 24

For the last option: b = 0, i = 14, d = 4, e = 10

population growth = (0+14) - (4+10) = 0

Hence, the last option is the correct option.

Answer:

d because i got a 100%

Explanation:

Answer:

the plate movement that caused by heat-related movement is the mantle

Explanation:

Answer:

that can be established only by changing a substance's chemical

Explanation:

Answer:

A chemical property is a characteristic of a substance abserved in chemical reactions.

Explanation:

Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.

Answer:

Deep zone, surface zone and transition zone.

Answer:

Explanation:

Answer:

Australia is correct

Explanation:

Because it is not attached to any other place

answer: 6.875 moles

nCH4 = nCO2 = 110/(12 + 4) = 6.875

6.875 moles of carbon dioxide are produced from the combustion of 110 g of CH4.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

The reaction is

[tex]\rm CH_4 + 2O_2 = CO_2 + 2 H_2O[/tex]

To calculate the number of moles, we will use the following formula

[tex]\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\\\\\rm Number\;of \;moles= \dfrac{110g}{12 + 4 } =6.875[/tex]

Thus, the number of moles are 6.875.

Learn more about moles, here:

https://brainly.com/question/15209553

Answer:

Diphosphanium

Explanation:

mark brianliest

Answer:

There are 13 numbers in an aluminum atom and 13 electrons.

Explanation:

This is because the atomic number equals the number of protons and the atomic number of Al is 13.  The number of electrons also equals the number of protons.

Answer:

13, 13

Explanation:

Answer:

are you aking an NWEA?

Explanation:

Answer: D

Explanation:

Answer:

You can look the answer at the photo

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