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2 years ago

What "waste" does the blood cell drop off at the lungs .... ANSWER ASAP AND I POINT EXTRA

Chemistry

2 answers:

bekas [8.4K]2 years ago

8 0

I believe the answer is carbon dioxide

DanielleElmas [232]2 years ago

5 0

Answer:

it drops off of <u>carbon dioxide.</u>.. but i believe when the blood returns to the heart it " travels" through the pulmonary veins...

use your brain :) brainliest pweasee?

You might be interested in

Draw the structure of 4-methyl-5-oxohexanal.

aniked [119]

Answer:

Explanation:

The structural formula provides more information which is often used to represent a particular organic substance. A structural formula indicates how the atoms are arranged within the molecule of a substance. From the information, the structure of 4-methyl-5-oxohexanal is represented by using a stick formula where the methyl group falls into position 4 and oxygen group falls into position 5 on the hexanal compound.

The structure is provided in the image attached below for better understanding.

4 0

3 years ago

Two isotopes of hypothetical element X exist with abundances of 30.00% 100X and 70.00% 101X. What is the approximate atomic mass

Rasek [7]

Answer:

C. 100.7 amu

Explanation:

Isotopes of an element are atoms of an element with the same atomic number but different atomic masses. Each atomic mass of an isotope is known as an isotopic mass. An element that exhibits isotope, that is, that have two or more isotopes has a relative atomic mass that is not a whole number.

Relative atomic mass of X is the sum of the products of the relative abundances of each isotope and its isotopic mass.

For Isotope ¹⁰⁰X: 30% × 100 = 30 amu

For Isotope ¹⁰¹X: 70% × 101 = 70.7 amu

Relative atomic mass of X = (30 + 70.7) amu = 100.7 amu

Therefore, the approximate atomic mass of X is 100.7 amu

4 0

2 years ago

A compound has a percent composition of 81.71% C and 18.29% H. What is the empirical formula of this compound?

SCORPION-xisa [38]

Considering the definition of empirical formula, the empirical formula is C₃H₈.

<h3>Definition of empirical formula</h3>

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

<h3>Empirical formula in this case</h3>

In this case, in first place you know the percent composition:

C: 81.71 %
H: 18.29%

Assuming a 100 grams sample, the percentages match the grams in the sample. So you have 81.71 grams of carbon and 18.29 grams of hydrogen H.

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

C: $\frac{81.71 grams}{12\frac{grams}{mole} }$ = 6.81 moles
H: $\frac{18.29 grams}{1\frac{grams}{mole} }$ = 18.29 moles

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

C: $\frac{6.81 moles}{6.81 moles}$ = 1
H: $\frac{18.29 moles}{6.81 moles}$ = 2.68 ≅ $\frac{8}{3}$

To express this relationship in the form of simple integers, it is necessary to multiply by a simple number to achieve this:

C: 1×3 =3
H:≅ $\frac{8}{3}$ ×3= 8

Therefore the C: H mole ratio is 3: 8

Finally, the empirical formula is C₃H₈.

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4 0

1 year ago

How many total atoms are in 0.500 g of P2O5?

BabaBlast [244]

<span>1.49 x 10^22 atoms

First determine the molar mass of P2O5 Atomic mass of Phosphorus = 30.973762 Atomic mass of Oxygen = 15.999 Molar mass of P2O5 = 2 * 30.973762 + 5 * 15.999 = 141.9425 Now determine how many moles of P2O5 you have 0.500 / 141.9425 = 0.003523 Since there's a total of 7 atoms per molecule of P2O5, multiply the number of moles by 7 to get the number of moles of atoms you have. 7 * 0.003523 = 0.024661 Finally, multiply by avogadro's number (6.0221409 x 10^23) to get the total number of atoms. 0.024661 * 6.0221409 x 10^23 = 1.48512 x 10^22</span>

8 0

3 years ago

Typical household bleach has a ph of 13. what is the h3o concentration in household bleach? round to the nearest hundredth. × 10

irina [24]

Typical household bleach has a value of pH of 13, so the concentration of H₃O⁺ in household bleach is 1 × 10⁻¹³ M.

pH of any solution is defined as the negative logarithm of the concentration of H⁺ ion presnt in the solution.

pH = -log[H⁺]

From this equation we can calculate the concentration of H⁺ ion by removing logarithm as:

[H⁺] = $10^{-pH}$

Given value of pH = 13

[H⁺] = 10⁻¹³ M

Hence, required concentration is 1 × 10⁻¹³ M.

To know more about pH, visit the below link:

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6 0

1 year ago