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Answer:

c.hg cannot be cracked for fractional distillation as there is only one of each

Explanation:

Explanation:

can you tell us what do want help with?

Answer:

Ok I will give you answer

Answer: True

Explanation:

Answer:

C)9.5

Explanation:

Given poH=4.5

find ph

from 14=ph+poh

14=ph+4.5

ph=9.5

Answer:

Heat  gained by 1.25 grams of ice is 250 joules

Explanation:

As we know

[tex]Q = mc\Delta[/tex]T

Where

[tex]\Delta[/tex]T is the change in temperature

Water freezes at 273.15 K/0 degree Celsius, and it boils at 373.15 K/00 degree Celsius,

[tex]\Delta[/tex]T  

m is the mass in grams

c is the specific heat of water (ice) = 2.05 joules/gram

Substituting the given values, we get -

[tex]Q = 1.25 * 2.0 * 100\\Q = 250[/tex]Joules.

Answer:

Explanation:

False. The greater the concentration, the lower the freezing point.

Answer:

Explanation:

The answer is C Liquid

Answer:

Do you have an idea that you want the design to be about? if you do I can help! if not I can give you ideas you can try to work with and you can tell me if theyre good or not.

Explanation:

Explanation:

The particles of matter are continuously in motion due to which tehy collide with each other, and this creates a vibration in the solids

I hope it is correct ☺️

Answer:

0.16 J/g℃

Explanation:

We have the following data:

heat = 1,200 J

mass of metal = m = 150 g

change in temperature = ΔT = 50.0℃

The heat absorbed is calculated by using the following equation:

heat = m x Cp x ΔT

So, we introduce the data in the equation to calculate the specific heat of the metal (Cp), as follows:

Cp = heat/(m x ΔT) = (1,200 J)/(150 g x 50.0℃) = 0.16 J/g℃

Answer:

there is nothing here

Explanation:

Respuesta:

2.17 × 10⁻³ g/cm³

Explicación:

Paso 1: Información provista

Paso 2: Convertir 64 °C a Kelvin

Usaremos la siguiente fórmula.

K = °C + 273.15 = 64 °C + 273.15 = 337 K

Paso 3: Calcular V₂

Usaremos la ecuación combinada de los gases ideales.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

V₂ = P₁ × V₁ × T₂ / T₁ × P₂

V₂ = 96.4 kPa × 969 cm³ × 273.15 K / 337 K × 100 kPa = 757 cm³

Paso 4: Calcular la densidad del gas a  TPE

A TPE, 1.64 g del gas ocupan 757 cm³.

ρ = 1.64 g/757 cm³ = 2.17 × 10⁻³ g/cm³

Answer:

Decreased change in temperature

Explanation:

Delta T signifies the temperature is changing, but by adding a negative, it specifies that it changes by decreasing.

Answer: Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.

Explanation:

Answer:

600k

Explanation:

6300j//390j/g

=600k

Answer:

Formula: [tex]Velocity \: V = f \lambda \\ Solution: = 5 \times 0.8 \\ = 4 \: {ms}^{ - 1} [/tex]

Answer:

The first guy is correct. That's what I got too

Answer:

No they form nitrogen oxide which can be poisonous to some species but depending on the amount of nitrogen it can be harmful to everything living. Such as if you put it with a plant that had low nitrogen levels then there would be no carbon dioxide to filter.

Explanation:

Answer:

60.0L of hydrogen are needed

Explanation:

Based on the reaction:

3H₂ + N₂ ⇄ 2NH₃

3 moles of hydrogen react 1 mole of nitrogen.

To solve this question we have to find the moles of nitrogen. With the moles of nitrogen we can find the moles of hydrogen. Using PV = nRT at STP conditions we can find the volume as follows:

Moles Nitrogen -Molar mass: 28g/mol-

25.0g N₂ * (1mol / 28g) = 0.893 moles N₂

Moles hydrogen:

0.893 moles N₂ * (3mol H₂ / 1mol N₂) = 2.679 moles H₂

Volume hydrogen:

PV = nRT

V = nRT / P

Where V is volume in liters,

n are moles of the gas: 2.679 moles

R is gas constant: 0.082atmL/molK

T is absolute temperature: 273.15K at STP

P is 1atm at STP

Replacing:

V = 2.679mol*0.082atmL/molK*273.15K / 1atm

V =

Answer:

700

Explanation:

How to find

Multiply the volume and pressure and divide the product by the temperature and the molar gas constant to calculate the moles of the hydrogen gas.

Solve: 204.83 × 27.88 / 8.76 = 651.901872146

Which is 651.90

In the nearest hundredths, the moles of gas is 700

Answer:

The meet

Explanation:

Answer:

True,When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction.

Answer:

[tex]\boxed {\boxed {\sf D. \ Sodium}}[/tex]

Explanation:

Valence electrons are electrons in the outermost shell.

One way to find valence electrons is with the electron configuration. This is often found on the Periodic Table. The last number in this configuration is the number of valence electrons, because an electron configuration shows where  electrons are located and the last number represents the outer shell.

In addition, all group 1 or alkali metals have 1 valence electrons. These include lithium, sodium, potassium, rubidium, cesium, and francium.

Even though we already know it is sodium based on valence electrons, here is an explanation of the reaction ratio.

Since sodium has 1 valence electron, it wants to get rid of it to satisfy the Octet Rule (8 valence electrons). Group 17 elements have 7 valence electrons, so they need 1. The two elements will react in a 1 to 1 ratio because the sodium donates its 1 excess electron to the group 17 element that needs 1.

The element that has 1 valence electron in its outer shell and will react with a group 17 element in a 1:1 ratio is sodium. Therefore, the correct option is option D.

The electrons in an atom's highest energy level, commonly referred to as the valence shell, are called valence electrons. These electrons interact with other atoms and participate in chemical bonds. Alkali metal sodium (Na), which belongs to group 1 of the periodic table, contains one valence electron in its outermost shell. Halogens, or group 17 elements, have 7 valence electrons.

Chlorine (Cl) is a member of group 17 and combines with sodium to generate sodium chloride (NaCl), an ionic compound. One sodium atom contributes its one valence electron to a chlorine atom, creating a stable ionic connection.

Therefore, the correct option is option D.

To know more about valence electron, here:

https://brainly.com/question/31264554

#SPJ6

Answer:

250k

I Really This Helps A Little Bit.

Answer:transfer oxygen through your blood

Explanation:

Answer:

coordinate the muscles that control breathing

hope this helps ⭐

Answer:

Supersaturated

Explanation:

The tea has absorbed and dissolved as much sugar as it could. If there is sugar left at the bottom, it means the solution is supersaturated because it can't absorb any more.

Answer:

yep.. I am wide awake here.

yep

ExPlAnAtIoN:

yezs and nozs

Answer:

B

Explanation: