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3 years ago

When calculating specific heat what if the change in temperature is negative?

Chemistry

1 answer:

Naya [18.7K]3 years ago

4 0

Answer:

If AT and q are negative, then heat flows from an object into its surroundings. If a substance gains thermal energy, its temperature increases, its final temperature is higher than its initial temperature, then AT>0 and q is positive.

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Select the sentence from the section "Cute Beavers Also Cause Trouble" that is MOST important to include in the section's summar

vichka [17]

The section "Cute Beavers Also Cause Trouble" that is MOST important to include in the section's summary is They can also be moved or killed if they cause trouble.

<h3>Are beavers a threat to humans?</h3>

Beavers are not to be creature which are not dangerous if left to be alone. But, they will often confront any threat when they are trapped or cornered, and thus a beaver will attack a human.

Hence, The section "Cute Beavers Also Cause Trouble" that is MOST important to include in the section's summary is They can also be moved or killed if they cause trouble.

Learn more about Beavers from

brainly.com/question/26756213

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5 0

2 years ago

The chemistry of anhydrides is similar to that of acid chlorides, although they react more slowly.

Volgvan

Answer:

both

Explanation:

6 0

3 years ago

A chef makes a marinade by mixing red pepper flakes, dried onion flakes, and a ground ginger with soy sauce. He sets the marinad

Alisiya [41]

Answer:

Suspension

Explanation:

This mixture is a simple suspension.

A suspension is a mixture of small insoluble particles of a solid in a liquid or gas. Here, it is insoluble particles in liquid.

Suspensions are settle on standing this is why they have to be mixed again.
The particles do not pass through ordinary filter paper.
They are usually cloudy and have an opaque color.
The marinade is simply a suspension.
It is not a solution because they do not settle on standing.
Also, colloids do not settle on standing.

3 0

3 years ago

Read 2 more answers

Which equation represents the pressure of a gas under ideal conditions?

lianna [129]

<span>The equation that represents the pressure of a gas under ideal conditions is the PV= nRT. The pressure of a gas is the exerted force that has various properties such as the compressibility and the viscosity. Compressibility refers to the response actions when pressure is applied.</span>

8 0

4 years ago

3. Crystalline structural unit of barium metal is a body-centered cubic cell. The edge length of the unit cell is 5.02x10-8 cm.

tiny-mole [99]

Answer:

The Avogadro's number is $N_A = 6.02289 *10^{23}$

Explanation:

From the question we are told that

The edge length is $L = 5.02 * 10^{-8} \ cm= \frac{5.02 * 10^{-8} }{100} = 5.02 * 10^{-10}$

The density of the metal is $\rho = 5.30\ g/cm^3 = 5.30 * \frac{g}{cm^3} * \frac{1*10^6}{1*10^3} = 5.30 *10^3kg/m^3$

The molar mass of Ba is $Z = 137.3 \ g/mol = \frac{137.3}{1000} = 0.1373 \ kg / mol$

Generally the volume of a unit cell is

$V = L^3$

substituting value

$V = [5.02 *10^{-10}]^3$

$V = 1.265*10^{-28}\ m^3$

From the question we are told that 68% of the unit cell is occupied by Ba atoms and that the structure is a metal which implies that the crystalline structure will be (BCC),

The volume of barium atom is

$V_a = \frac{V}{2} * 0.68$