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3 years ago

If we know the specific heat of a material, can we determine how much heat is released under a given set of circumstances?

Chemistry

1 answer:

Alekssandra [29.7K]3 years ago

6 0

Answer:

Yes

Explanation:

literally have no idea i just got it right on ck-12 lol

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Calculate the pressure exerted on the floor when an elephant who weighs 2400 N

Inessa05 [86]

Answer:

The answer is

Explanation:

The pressure exerted by an object given the force of the object and the area can be found by using the formula

$P = \frac{f}{a} \\$

where

P is the pressure

f is the force

a is the area

From the question

f = 2400 N

a = 0.4 m²

So we have

$P = \frac{2400}{0.4} \\$

We have the final answer as

Hope this helps you

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3 years ago

P4+O2=P2O3<br> What’s the balance of this equation?

Natasha_Volkova [10]

Explanation:

P₄+O₂=P₂O₃; non-balanced

P₄+O₂=2P₂O₃; to add '2' on the right side; non-balanced

P₄+3O₂=2P₂O₃. to add '3' before O₂ in the left side; balanced

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3 years ago

How are scientific methods used?

dalvyx [7]

Scientific methods are used to study living things or investigate questions and solve problems.

4 0

3 years ago

If 30.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 40.0 mL of 0.175 M HCl, what is the concentration of the C

Over [174]

Answer:

Concentration of Ca(OH)₂:

0.117 M.

Explanation:

How many moles of HCl is consumed?

Note the unit of concentration: moles per liter solution.

$c(\text{HCl}) = 0.175\;\text{M} = 0.175\;\text{mol}\cdot\textbf{L}^{-1}$ .

Convert milliliters to liters.

$V(\text{HCl})=40.0\;\text{mL} = 0.0400\;\text{L}$ .

$n(\text{HCl}) = c(\text{HCl})\cdot V(\text{HCl})= 0.175\;\text{mol}\cdot\text{L}^{-1} \times 0.0400\;\text{L}= 7.00\times 10^{-3}\;\text{mol}$ .

How many moles of NaOH in the solution?

Refer to the equation. The coefficient in front of Ca(OH)₂ is 1. The coefficient in front of HCl is 2. In other words, it takes two moles of HCl to neutralize one mole of Ca(OH)₂. That $7.00\times 10^{-3}\;\text{mol}$ of HCl will neutralize only half that much Ca(OH)₂.

$\displaystyle n(\text{Ca}(\text{OH})_2)=\frac{1}{2}\;n(\text{HCl}) = 3.50\times 10^{-3}\;\text{mol}$ .

What's the concentration of the Ca(OH)₂ solution?

Concentration is the number of moles of solute per unit volume.

$\displaystyle c(\text{Ca}(\text{OH})_2) = \frac{n(\text{Ca}(\text{OH})_2)}{V(\text{Ca}(\text{OH})_2)} = \frac{3.50\times 10^{-3}\;\text{mol}}{0.0300\;\text{L}}=0.117\;\text{mol}\cdot\text{L}^{-1}$ .

3 0

3 years ago

PLEASE HELP 1ST ONE GETS BRAINLY AND ALSO THE QUESTION IS, WHAT DOES THIS PICTURE SHOW????

GREYUIT [131]

Answer:

It shows the gravitational pull from the earth to the moon

Explanation:

Hope this helps :))

6 0

4 years ago

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