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3 years ago

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!! 100 points!

Chemistry

1 answer:

Elenna [48]3 years ago

8 0

Answer:

Explanation: Hydrochloric Acid (HCl) Hydrochloric acid is the strong acid which is found inside our body in the gastric juice. It helps in the breakdown of all the potatoes and pizzas we eat and turns down the enzymes, which change the food particles into protein.LSD is made by creating a fungus on seeds of rye or morning glory. A hallucinogenic drug, capable of changing the way people look at, think about, and experience the world around them. The power of this drug makes it popular, as does its portability.

An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons. Most acids contain a hydrogen atom bonded that can release (dissociate) to yield a cation and an anion in water. The higher the concentration of hydrogen ions produced by an acid, the higher its acidity and the lower the pH of the solution.

The word acid comes from the Latin words acidus or acere, which mean "sour," since one of the characteristics of acids in water is a sour taste (e.g., vinegar or lemon juice).

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A solution was made by adding water to 0.250 g of H2Z until the volume totaled 25.00 mL. Subsequent titration required 40.50 mL

Brilliant_brown [7]

Answer:

123 g/mol

Explanation:

Let's consider the neutralization reaction.

H₂Z(aq) + 2 NaOH(aq) → Na₂Z(aq) + 2 H₂O(ℓ)

The moles of NaOH that reacted are:

$40.50 \times 10^{-3} L \times \frac{0.100molNaOH}{1L} =4.05\times 10^{-3} molNaOH$

The molar ratio of H₂Z to NaOH is 1:2. The moles of H₂Z that reacted are:

$4.05\times 10^{-3} molNaOH \times \frac{1molH_{2}Z}{2molNaOH} =2.03\times 10^{-3} molH_{2}Z$

The molar mass of H₂Z is:

$\frac{0.250gH_{2}Z}{2.03\times 10^{-3} molH_{2}Z} =123g/mol$

7 0

4 years ago

How could an alpha particle pass straight through the metal foil and strike the center of the phosphor screen on the other side

djverab [1.8K]

I think you refer to Rutherford's Gold Foil Experiment alpha particles pass through because of the enormous amount of empty space inside the atom.

>>>more details here<<<
to have its trajectory affected the alpha particle has to pass "near" the nucleus to interact with the positive charge of the nucleus.
the fact is that internally the gold atoms are basically empty space and the nucleus represents only a small portion of the entire volume. only few alpha particles pass near the nucleus

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-gio-chealafi- hope this helps you, have a nice rest of the day. ily all!!

8 0

3 years ago

I am so lost, and suggestions to how I can solve this?

Ad libitum [116K]

<h3>Answer:</h3>

165.078 g

<h3>Explanation:</h3>

<u>We are given;</u>

Specific heat capacity of nickel as 0.446 J/g°C
Initial temperature of nickel is 255.5 °C
Mass of water in the calorimeter is 250.0 g
Initial temperature of water is 20° C
Final temperature of the mixture is 35.5°C

Specific heat capacity of water is 4.18 J/g°C

We are required to calculate the mass of nickel sample;

<h3>Step 1: Calculate the amount of heat absorbed by water.</h3>

We know that quantity of heat absorbed, Q = m × c × ΔT

Change in temperature, ΔT = 35.5°C - 20°C

= 15.5 °C

Therefore, Q = 250 g × 4.1 J/g°C × 15.5° C

= 16,197.5 Joules

<h3>Step 2: Calculate the amount of heat released by nickel sample</h3>

Assuming the mass of nickel sample is m

Then, Heat released, Q = m × c × ΔT

Change in temperature, ΔT = 255.5 °C - 35.5 ° C

= 220 °C

Q = m × 0.446 J/g°C × 220° C

= 98.12m joules

<h3>Step 3: Determine the mass of nickel sample</h3>

We know that the amount of heat absorbed is equivalent to amount of heat released.

That is, Quantity of heat absorbed = Quantity of heat released

Therefore;

98.12 m joules = 16,197.5 Joules

m = 165.078 g

Thus, the mass of nickel sample is 165.078 g

8 0

4 years ago

How do temperature pressure and density change as you move from the outer layer the crust through the mantel to the core? ( 10 p

kupik [55]

This is right
Reduce the concentration of NICO4

6 0

3 years ago

I need help, I don't understand the question

rjkz [21]

The awnser is probably B

7 0

4 years ago