Which evidence indicates the ocean plays a large role in climate change?

What type of chart is used to help organize study and predict genetic inheritance?

Oliga [24]

The type of chart is a graph

4 0

3 years ago

A solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the

enyata [817]

Answer: The molarity of NaOH solution is 0.273 M.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of KHP = 1.794 g

Molar mass of KHP = 204.2 g/mol

Putting values in above equation, we get:

$\text{Moles of KHP}=\frac{1.794g}{204.2g/mol}=0.0088mol$

The chemical reaction for the reaction of KHP and NaOH follows

$KHC_8H_4O_4(aq.)+NaOH\rightarrow KNaC_8H_4O_4(aq.)+H_2O(l)$

By Stoichiometry of the reaction:

1 mole of KHP reacts with 1 mole of NaOH.

So, 0.0088 moles of KHP will react with = $\frac{1}{1}\times 0.0088=0.0088mol$ of NaOH

To calculate the molarity of NaOH, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

We are given:

Moles of NaOH = 0.0088 moles

Volume of solution = [32.47 - 0.23] mL = 32.24 mL = 0.03224 L (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$\text{Molarity of NaOH }=\frac{0.0088mol}{0.03224L}=0.273M$

Hence, the molarity of NaOH solution is 0.273 M.

3 0

3 years ago

When an atom in a reactant loses electrons, what happens to its oxidation number? A. Its oxidation number decreases. B. Its oxid

Neko [114]

ANSWER:

its oxidation number increases

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6 0

4 years ago

Read 2 more answers

Which receptors and effectors are involved in the refldex action of:{a} blinking of eyes in light spark {b} withdrawal of hand o

liberstina [14]

The receptor and effector that is involved in the following are:

{a} blinking of eyes in light spark – cerebral receptor and corneal reflex effector.

{b} withdrawal of hand on touching hot – spinal reflexes

<h3>What are receptors and effectors?</h3>

Receptors are the molecules present in the cell that mix with a specific substance and react for a specific function.

Effectors are the muscles or organs that are used in the motion, of an organ of the body.

Thus, the {a} blinking of eyes in light spark – cerebral receptor and corneal reflex effector.

{b} withdrawal of hand on touching hot – spinal reflexes.

To learn more about receptors and effectors, refer to the link:

brainly.com/question/3190796

#SPJ4

7 0

2 years ago

How much baking soda and vinegar do I need for 3.2 cups?

Oksana_A [137]

Adding vinegar to baking soda is a classic example of a chemical change where sodium ... There are many simple examples of physical changes, like melting ice (solid water) to liquid ... Add an equalvolume of borax solution to the cup of glue solution slowly, ... P.I. – 3.2 Describe chemical and physical changes, including.

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3 years ago