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Vitek1552 [10]
3 years ago
7

OMG SOMEONE PLEASE HELP I DONT KNOW HOW TO DO THIS

Chemistry
1 answer:
uranmaximum [27]3 years ago
4 0
3-25200 m
4- 0.0023 cl
5-
6- 23 mm
7-4500mm
8-450000ml
9-0.45kg
10-

Sorry I couldn’t get them all but there is most of the answers
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Which quantity can be calculated using the equation E=MC^2
r-ruslan [8.4K]

Answer:

The energy needed to split an atom into separate protons, neutrons, and electrons

Explanation:

The equation E = MC^2 is developed by Einstein’s Special Relativity Theory

where,

E = Energy

M = mass

C = speed of the light

The energy should be measured in Joules i.e J

The mass should be measured in Kilogram i.e Kg

And, the speed of the light should be measured in meters per second i.e ms-1

The C should be squared

Now the energy is required to divided into three particles i.e protons, electrons and neutrons

It also needs to allocate the nucleus into distinct protons and neutrons that we called binding energy of nuclear

And if the energy is required to take off an electron from an atom we called the energy of ionization

And if the energy is required to add an electron to an atom so we called it affinity of electron

8 0
4 years ago
A 0.366 mol sample of pcl5(g) is injected into an empty 4.45 l reaction vessel held at 250 °c. calculate the concentrations of p
Maru [420]
Chemical reaction: PCl₅ → PCl₃ + Cl₂.
n(PCl₅) = 0,366 mol.
V(PCl₅) = 4,45 L.
c(PCl₅) = n(PCl₅) ÷ V(PCl₅).
c(PCl₅) = 0,366 mol ÷ 4,45 L.
c(PCl₅) = 0,082 mol/L.
Kc = 1,80.
[PCl₃] = [Cl₂] = x.
Kc = [PCl₃] · [Cl₂] ÷ [PCl₅].
1,80 = x² ÷ (0,082 mol/L - x).
Solve quadratic eqaution: x = [PCl₃] = 0,078 mol/L.
[PCl₅] = 0,082 mol/L - 0,078 mol/L.
[PCl₅] = 0,004 mol/L.
6 0
3 years ago
~Hey guys, can somebody answer this for me, thanks :) ~
NISA [10]
I think it's 11.56 minutes
3 0
3 years ago
Which element has the greatest density at stp? calcium, chlorine, carbon or copper?
ludmilkaskok [199]
Density = mass/volume

Since at STP, one mole of any gas occupies 22.4 liters, therefore, the volume is equal.
So, we will arrange based on mass.

From the periodic table:
mass of carbon = 12 grams
mass of calcium = 40 grams
mass of chlorine = 35.5 grams
mass of copper = 63.5 grams

Based on this:
copper has the highest density.
8 0
3 years ago
Read 2 more answers
Summarize how methylmercury can biomagnify in the food chain. <br><br>​
dmitriy555 [2]

Answer:

it can change the ways others eat

Explanation:

because the methylmercury depends on the animal

4 0
3 years ago
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