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Brrunno [24]
3 years ago
11

Help quickly will give brainliestt

Chemistry
1 answer:
galben [10]3 years ago
5 0

Answer:

Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.

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If you were to measure the mass of magnesium and hydrochloric acid before combining them in the test tube, how would that mass c
SIZIF [17.4K]
The balanced chemical reaction for the system given is as follows:

2Mg + 2HCl = 2MgCl + H2

The mole ratio of the reactants is one is to one which means with a given amount of magnesium requires the same amount of hydrochloric acid to have a complete reaction. If supplied exactly, then after the reaction, all of the reactants are consumed and formed into the products.
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3 years ago
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Why is a wire used to connect the electrodes in an electrochemical cell?
jarptica [38.1K]

Answer:

D. So electrons can flow from one electrode to another

Explanation:

An electrochemical cell is any cell in which electricity is produced by reason of a chemical change.

An electrochemical cell consists of two electrodes, these two electrodes are connected using a wire.

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3 years ago
State and explain the relative change in the pH and in the buffer-component concentration ratio, [NaA]/[HA], for each of the fol
melisa1 [442]

When pure HA is added to the buffer, the buffer component ratio and the pH decrease.

<h3>State and explain the relative change in the pH and in the buffer-component concentration ratio, [NaA]/[HA] for the dissolve of pure HA in the buffer.</h3>

When pure HA is added to the buffer, the buffer component ratio and the pH decrease. The added HA increases the concentrations of NA and HA. However, there is a greater relative increase in the concentration of HA. Hence, the ratio of [NaA]/[HA] decreases, causing the solution to become more acidic.

The capacity of a buffer to withstand pH change is measured. The concentration of the buffer's components namely, the acid and its conjugate base determine this ability. Greater buffer capacity is associated with higher buffer concentration.

To learn more about buffer-component, Visit:

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2 years ago
A student dissolves 0.0688 mol of sodium hydroxide in water to make a 0.250 L solution. What is the molarity of the solution?
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Number of moles = 0.0688 moles of NaoH

volume = 0.250 L

Molarity = moles of solute / volume ( L )

M = 0.0688 / 0.250

M = 0.28 M

Answer B
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meet .google .com/sxr-wgwg-vnc

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