Need help with answers 1-5?

During which of the fallowing chemical changes does a precipitate form??

Nikitich [7]

<span>A PRECIPITATE is a solid that forms inside of a mixture.
When we add lemon juice to milk, the lemon juice causes lumps to form inside of the milk. SOLID lumps.
We call them "curds." So, we end up with SOLID curds, formed inside of liquid whey.

if that doesn't help its B</span>

4 0

3 years ago

One way a mineral can form is when a scientist grows it under laboratory conditions? True or False

AURORKA [14]

Answer:

I THINK ITS FALSE

Explanation:

please mark me as brainliest

5 0

3 years ago

If salt (5. 99 × 10–6 mol) is dissolved in 1. 50 × 10–2 L of water, which expression can be used to find the molarity of the res

Alexus [3.1K]

Molarity can be defined as the moles of solute in a liter of solution. The molarity of the salt solution is $\rm \bold{3.99\;\times\;10^{-4}\;M}$ .

<h3>What is the relation between moles and volume?</h3>

The moles are the mass of substance with respect to the molar mass. The moles and volume relationship can be expressed in terms of molarity.

The molarity can be expressed as:

$\rm Molarity=\dfrac{Moles}{Volume}$

The given solution has,

Moles of salt = $\rm 5. 99\;\times\; 10^-^6$

The volume of solution = $\rm 1.50\;\times\;10^-^2$ L.

Substituting the values for molarity as:

$\rm Molarity=\dfrac{5.99\;\times\;10^{-6}}{1.50\;\times\;10^-^2\;L}\\ Molarity=3.99\;\times\;10^{-4}\;M$

The molarity of the solution is $\rm \bold{3.99\;\times\;10^{-4}\;M}$ . Thus, option C is correct.

Learn more about molarity, here:

brainly.com/question/12127540

4 0

3 years ago

Which of the following has more particles

erma4kov [3.2K]

Answer:

A mole is Avogadro's number of items: 6.022 × 1023.

Explanation:

4 0

3 years ago

The weak base ammonia, NH3, and the strong acid hydrobromic acid react to form the salt ammonium bromide, NH4Br. Given that the

Leya [2.2K]

The pH of a 0.053 M solution of ammonium bromide at 25° C is equal to 33.9.

<h3>What are acids and bases?</h3>

Acids are a substance that has a pH lower than 7 and bases are a substance that has a pH of more than 7.

the pH of any solution will be calculated as:

pH = -log[H⁺]

Given the chemical reaction in equilibrium with ICE table will be:

NH₄⁺ + H₂O ⇌ NH₃ + H₃O⁺

Initial: 0.289 0 0

Change: -x +x +x

Equilibrium: 0.289-x x x

Equation for Kb for this reaction is:

Kb = [NH₃][H₃O⁺] / [NH₄⁺]

Given value of Kb = 1.8 × 10⁻⁵

On putting values equation becomes

1.8 × 10⁻⁵ = x² / 0.053 - x

The value of x is negligible as compared to 0.053 so the equation becomes

1.8 × 10⁻⁵ = x² / 0.053

x = 2.28 × 10⁻³

i.e. [NH₃] = [H₃O⁺] = 33.9 × 10⁻³

Calculating the pH by putting this concentration value on the equation

pH = -log(33.9 × 10⁻³)

pH = 33.9

Thus, the pH will be 33.9.

To learn more about acids and bases, refer to the link:

brainly.com/question/13646534

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7 0

2 years ago