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3 years ago

I NEED HELP FAST PLEASE please answer correctly Will mark brainliest thank you!!

Chemistry

2 answers:

Dimas [21]3 years ago

8 0

Answer:

i dont know that plzzz help me tooooo

yKpoI14uk [10]3 years ago

5 0

Answer:

Explanation:

Using Charles Law ,

$\frac{V1}{T1}=\frac{V2}{T2}$

Using this formula we have ,

V1= 200cm^3

T1=40+273.15 = 313.15 K

T2 = 100+273.15 = 373.15 k

V2= ?

Hence using above formula simplify it we will get ,

V2 = 238.3 cm^3

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Which of the following mass units is the largest? a) 1 cg b) 1 dg c) 1 mg d) 1 ng

N76 [4]

Answer: option b) 1 dg

Explanation:

1) These are the different equivalences of those quantities:

a) 1 g = 100 cg ⇒ 1 cg = 0.01 g

b) 1 g = 10 dg ⇒ 1 dg = 0.1 g

c) 1 g = 1000 mg ⇒ 1 mg = 0.001 g

d) 1g = 10⁹ g ⇒ 1 ng = 10 ⁻⁹g

2) Now that you have all the masures in grams you can compare:

0.1g > 0.01g > 0.001g > 10 ⁻⁹g

3) So, the largest value is 0.1g which is 1 dg.

4 0

3 years ago

Read 2 more answers

Animals breathe oxygen and release carbon dioxide during cellular respiration according to the equation below. How much oxygen i

kifflom [539]

Answer:

14.544 g of oxygen is needed to produce 120 grams of carbon dioxide.

Explanation:

Animals take in oxygen and breathe out carbon dioxide during cellular respiration. The reaction for the metabolism of the food in the animal body is:

$C_6H_{12}O_6 + O_2 \rightarrow 6CO_2 + 6H_2O + Energy$

As can be seen from the reaction stoichiometry that:

6 moles of carbon dioxide gas can be produced from 1 mole of oxygen gas in the process of metabolism of glucose.

Also,

Given :

Mass of carbon dioxide gas = 120 g

Molar mass of carbon dioxide gas = 44 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus, moles of carbon dioxide are:

$moles_{CO_2} = \frac{120 g}{44 g/mol}$

$moles_{CO_2} = 2.7273 mol$

As mentioned:

6 moles of carbon dioxide gas can be produced from 1 mole of oxygen gas in the process of metabolism of glucose.

1 mole of carbon dioxide gas can be produced from 1/6 mole of oxygen gas in the process of metabolism of glucose.

2.7273 mole of carbon dioxide gas can be produced from $\frac{1}{6} \times 2.7273$ moles of oxygen gas in the process of metabolism of glucose.

Thus, moles of oxygen gas needed = 0.4545 moles

Molar mass of oxygen gas = 32 g/mol

The mass of oxygen gas can be find out by using mole formula as:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Mass\ of\ oxygen\ gas = Moles \times Molar mass}$

$Mass\ of\ oxygen\ gas = 0.4545 \times 32}$

$Mass\ of\ oxygen\ gas = 14.544 g$

14.544 g of oxygen is needed to produce 120 grams of carbon dioxide.

3 0

3 years ago

Read 2 more answers

I NEED ANSWERD ASAP !!!!

gavmur [86]

It depend on what kind of seed it is.

6 0

3 years ago

Which units are used to measure both velocity and speed? Select 3 correct choices.

poizon [28]

Answer:

km/h

mph

iph

Explanation:

I have no idea what mis or dit could be

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3 years ago

Which distinguishes an atom of one element from an atoms of a different element?

dalvyx [7]

Answer:

The number of protons you welcome

Explanation:

7 0

3 years ago

I NEED HELP FAST PLEASE *please answer correctly* Will mark brainliest thank you!!

I NEED HELP FAST PLEASE please answer correctly Will mark brainliest thank you!!