Y'all wanna help me with chemistry? The chart and bottom question for brainliest!

What forms the structure called a coral reef

lina2011 [118]

When the little fish die they sink to the bottom, and after time the skeletons build up on top of each other.

7 0

4 years ago

2.00 L of 0.800 M NaNO3 must be prepared from a solution known to be 2.50 M in concentration.How many mL are required? Plus don'

Morgarella [4.7K]

Answer:

1.36 × 10³ mL of water.

Explanation:

We can utilize the dilution equation. Recall that:

$\displaystyle M_1V_1= M_2V_2$

Where M represents molarity and V represents volume.

Let the initial concentration and unknown volume be M₁ and V₁, respectively. Let the final concentration and required volume be M₂ and V₂, respectively. Solve for V₁:

$\displaystyle \begin{aligned} (2.50\text{ M})V_1 &= (0.800\text{ M})(2.00\text{ L}) \\ \\ V_1 & = 0.640\text{ L} \end{aligned}$

Therefore, we can begin with 0.640 L of the 2.50 M solution and add enough distilled water to dilute the solution to 2.00 L. The required amount of water is thus:
$\displaystyle 2.00\text{ L} - 0.640\text{ L} = 1.36\text{ L}$

Convert this value to mL:
$\displaystyle 1.36\text{ L} \cdot \frac{1000\text{ mL}}{1\text{ L}} = 1.36\times 10^3\text{ mL}$

Therefore, about 1.36 × 10³ mL of water need to be added to the 2.50 M solution.

8 0

2 years ago

Match each term to its description. (3 points)

madreJ [45]

Answer: Limiting reactant = 3

Theoretical Yield= 1

Excess reactant=2

Explanation: The theoretical yield is the maximum possible mass of a product that can be made in a chemical reaction. It can be calculated from: the balanced chemical equation. the mass and relative formula mass of the limiting reactant , and. the relative formula mass of the product.

An excess reactant is a reactant present in an amount in excess of that required to combine with all of the limiting reactant. It follows that an excess reactant is one remaining in the reaction mixture once all the limiting reactant is consumed.

The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops. From the reaction stoichiometry, the exact amount of reactant needed to react with another element can be calculated

3 0

3 years ago

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What are the uses of crude oil?

vampirchik [111]

Answer:

they are use to make tar, asphalt, paraffin wax, and lubricating oils.

Explanation:

7 0

3 years ago

A comic book villain is holding you at gun point and is making you drink a sample of acid he gives you a beaker with 100 ml of a

miss Akunina [59]

Answer:

b. 10 mL

Explanation:

First we calculate the amount of H⁺ moles in the acid:

pH = -log [H⁺]

[H⁺] = $10^{-pH}$

[H⁺] = 10⁻⁵ = 1x10⁻⁵M

100 mL ⇒ 100 / 1000 = 0.100 L

1x10⁻⁵M * 0.100 L = 1x10⁻⁶ mol H⁺

In order to have a neutral solution we would need the same amount of OH⁻ moles.

We can use the pOH value of the strong base:

pOH = 14 - pH

pOH = 14 - 10 = 4

Then we calculate the molar concentration of the OH⁻ species in the basic solution:

pOH = -log [OH⁻]

[OH⁻] = $10^{-pOH}$ = 1x10⁻⁴ M

If we use 10 mL of the basic solution the number of OH⁻ would be:

10 mL ⇒ 10 / 1000 = 0.010 L

1x10⁻⁴ M * 0.010 L = 1x10⁻⁶ mol OH⁻

It would be equal to the moles of H⁺ so the answer is b.

7 0

3 years ago

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