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3 years ago

Which sentence best describes a relationship between earths system

Chemistry

1 answer:

Musya8 [376]3 years ago

4 0

Answer:

Together, these systems support all plant and animal life.

Explanation:

Within the boundary of the Earth is a collection of four interdependent parts called “spheres“: the lithosphere, hydrosphere, biosphere, and atmosphere. The spheres are so closely connected that a change in one sphere often results in a change in one or more of the other spheres.

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The difference in temperature of the two glasses of water is 30°C. What is their difference in temperature on the Kelvin scale?

Nutka1998 [239]

Answer:

Explanation:

Because 30c is kevin and add 303+30=333-30=303

3 0

2 years ago

Determine whether the graph is that of a function by using the vertical-line test. If it is, use the graph to find (a) its domai

Ilia_Sergeevich [38]

Answer:

Following are the solution to this question:

Explanation:

If the draw a line perpendicular with y-axis thru the diagonal line check but it meets only one curved point, therefore the curve indicates a function not otherwise. They draw a vertical line perpendicular to the y-axis there, it just intersects one more chart point, which is why a graph is a feature:

In point a:

$\to Domain= [-\pi ,\pi ]\\\\\to Range = [-1,1]$

In point b:

Its y-axis length cut also by understanding the benefits of y-interception and the x-axis length gives the x-intercept.

$\to y-intercept = 1\\\\\to x-intercept = \frac{\pi}{2} ,- \frac{\pi}{2} \\\\$

In point C:

Every graph is y-axis symmetric because the left side of the column as well as the middle side of the graph is about the same.

3 0

3 years ago

A solution of the primary standard potassium hydrogen phthalate (KHP), KHC8H4O4 , was prepared by dissolving 0.4877 g of KHP in

Grace [21]

Answer:

The concentration of KOH is 0.06137 M

Explanation:

Step 1: Data given

Molar mass of KHP = 204.22 g/mol

Mass of KHP = 0.4877 grams

Volume of water = 50 mL

Volume of KOH solution = 38.91 mL

Step 2: The balanced equation

C8H5KO4 + KOH ⇒ C8H4K2O4+ H2O

Step 3: Calculate number of moles of KHP

Moles = Mass / molar mass

Moles KHP = 0.4877 grams / 204.22 g/mol

Moles KHP = 0.002388 moles

Step 4: Calculate moles of KOH

For 1 mol KHP we need 1 mol KOH to produce 1 mol C8H4K2O4 and 1 mol H2O

For 0.002388 moles KHP we need 0.002388 moles KOH

Step 5: Calculate the concentration of KOH

Concentration = moles / volume

Concentration of KOH = 0.002388 moles / 0.03891 L

Concentration of KOH = 0.06137 M

The concentration of KOH is 0.06137 M

4 0

3 years ago

I need help on this<br>all of them plz

yaroslaw [1]

For the first question it would be a unit obtained from the change in velocity per unit of time or m/s^2.

The vf and vi represent the final and initial velocity of the object and or item.

Knowing the formula for acceleration is simply change in velocity divided by time

Vi = 0
Vf = 27 m/s
t = 10 s

Vf = vi + at

27 = 10a

a = 27/10 or 2.7 m/s^2.

6 0

4 years ago

How many moles of naoh will react with 13.5 moles of k3po4

Alona [7]

Answer: 40.5 mol

Explanation:

Since this is a double replacement reaction, the unbalanced equation is something like follows:

$\text{K}_{3}\text{PO}_{4}+\text{NaOH} \longrightarrow \text{KOH}+\text{Na}_{3}\text{PO}_{4}$

Balancing this equation,

$\text{K}_{3}\text{PO}_{4}+3\text{NaOH} \longrightarrow 3\text{KOH}+\text{Na}_{3}\text{PO}_{4}$

From this equation, we can conclude that for every 3 moles of sodium hydroxide consumed, 1 mole of potassium phosphate is consumed.

This means the answer is 13.5(3)=<u>40.5 mol</u>

8 0

2 years ago