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3 years ago

Can you Please answer this question?

Chemistry

1 answer:

olga2289 [7]3 years ago

8 0

Answer:

first option is not true

Explanation:

1 mole = 6.02 × 10²³ particles

C3H8 has 1 mole, so has 6.02 × 10²³ particles

5O2 has 5 moles so 5 × 6.02 × 10²³ = 3.01 × 10²⁴ particles

3CO2 has 3 moles so 3 × 6.02 × 10²³ = 1.806 × 10²⁴ particles

4H2O has 4 moles so 4 × 6.02 × 10²³ = 2.408 × 10²⁴ particles

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This coffee pot has a temperature of 23 degrees. The coffee cup was put in the microwave and is now 45 degrees. Which one has a

qwelly [4]

Answer:

. Which one has a greater thermal energy?

the coffee cup

8 0

3 years ago

Please help with 1 chemistry question thank you!

ale4655 [162]

Here are the CORRECT names and molecular formulas

carbonate: $CO_3^{2-}$
bicarbonate: $HCO_3^{-}$

Choice 1 is incorrect

nitrite: $NO_2^{-}$
nitrate: $NO_3^{-}$

Choice 2 is incorrect

sulfite: $SO_3^{2-}$
sulfide: $S^{2-}$

Choice 3 is incorrect

By process of elimination, you can infer choice 4 is correct.

Actually, choice 4 is the only choice that displays the correct name and formula.

Have an awesome day! :)

7 0

3 years ago

Suppose a healthy individual experiences a surge in plasma calcium. subsequently, where would one expect to find the greatest am

victus00 [196]

One can expect to find the greatest amount of hydrolyzed pth when, entering the nephrons.

<h3><u>Where would one expect to find the greatest amount of hydrolyzed pth ?</u></h3>

In a healthy person, the body will respond by excreting calcium and PTH byproducts if plasma calcium is higher than usual. The nephron is a solid predictor since the kidneys are where excretion takes place.

A) is false since PTH, not the hydrolyzed compounds, is produced by the parathyroid gland.
One would anticipate significant amounts of PTH exiting the liver rather than entering since the liver hydrolyzes PTH.
The largest concentration would still be in the nephrons, even if it is possible that some hydrolysis products will be in systemic circulation (and therefore penetrate the bones).
The cortical bone, which is the outermost part of the bone, has a network of small tubes called haversian canals that let blood vessels and nerves to pass through them.

To view more about hydrolyzed pth, refer to:

brainly.com/question/4765096

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8 0

1 year ago

How many moles of h2 can be formed if a 3.25g sample of Mg reacts with excess HCl

kogti [31]

Answer:

0.134 moles of H₂ can be formed if a 3.25g sample of Mg reacts with excess HCl

Explanation:

The balanced reaction is:

Mg + 2 HCl → MgCl₂ + H₂

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles react:

Mg: 1 mole
HCl: 2 moles
MgCl₂: 1 mole
H₂: 1 mole

Being:

Mg: 24. 31 g/mole
H: 1 g/mole
Cl: 35.45 g/mole

the molar mass of the compounds participating in the reaction is:

Mg: 24.31 g/mole
HCl: 1 g/mole + 35.45 g/mole= 36.45 g/mole
MgCl₂: 24.31 g/mole + 2*35.45 g/mole= 95.21 g/mole
H₂: 2*1 g/mole= 2 g/mole

Then, by stoichiometry of the reaction, the following quantities of mass participate in the reaction:

Mg: 1 mole* 24.31 g/mole= 24.31 g
HCl: 2 moles* 36.45 g/mole= 72.9 g
MgCl₂: 1 mole* 95.21 g/mole= 95.21 g
H₂: 1 mole* 2 g/mole= 2 g

Then you can apply the following rule of three: if by stoichiometry 24.31 grams of Mg form 1 mole of H₂, 3.25 grams of Mg how many moles of H₂ will they form?

$moles of H_{2} =\frac{3.25 grams of Mg*1 mole of H_{2} }{24.31 grams of Mg}$

moles of H₂= 0.134

<u><em>0.134 moles of H₂ can be formed if a 3.25g sample of Mg reacts with excess HCl</em></u>

7 0

4 years ago

В<br> D<br> 5. At which point is the sonar travel time going to be the shortest?

PIT_PIT [208]

Answer:

okay ☺️

b. it's b

Explanation:

8 0

3 years ago