Which of the following is an example of radiation?A. boiling water on the stove
B. sun bathing outside on a sunny day
C. touching a stove and getting burned
D. warm and cool water currents in the ocean

Answers

Answer 1

Answer: I believe the best answer to that question wud be D. I cud b wrong

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NEED HELP AS SOON AS POSSIBLE!7. How many atoms are present in a 6.00 g sample of silver?
a. 1.07 x 10^-1 atoms
b. 6.47 x 10^2 atoms
c. 3.35 x 10^22 atoms
d. 3.61 x 10^24 atoms

8. How many atoms are present in 2.0 x 10^6 mol of carbon?
a. 3.3 x 10^-18 atoms
b. 4.0 x 10^-17 atoms
c. 1.0 x 10^29 atoms
d. 1.2 x 10^30 atoms

9. what mass is present in sample of AgNO3 containing 3.14 x 10^19 formula units?
a. 5.21 x 10^-5 g
b. 8.86 x 10^-3 g
c. 1.13 x 10^2 g
d. 1.92 x 10^4 g

10. How many molecules are present in 36.6 L of SO2 gas at STP?
a. 1.36 x 10^-21 molecules
b. 1.63 x 10^0 molecules
c. 1.54 x 10^22 molecules
d. 9.84 x 10^23 molecules

Answers

I got :
  7) C
  8) D
  9) B
10) D

The decimal difference in my calculations may be due to my rounding off or my use of the exact values in some cases.
Note: Mr - Molar Mass
L - Avogadro's Constant

Based on the law of Conservation of Mass, what happens to the mass of a substance in a chemical change? A: the mass is always conserved B: The mass is either created or destroyed C: the reactant always has more mass D: the product always has more mass

Answers

Answer:

Explanation:

The amount of mass always stays the same, matter cannot be created nor destroyed, it can only change forms. Thus, the answer is A.

In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction.

I hope this helps..

What is Very small and located on ER or locatedfloating on its own in the cytoplasm, it is
responsible for making proteins for repair and
growth.

Answers

These are ribosomes definately

The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 4.00 g of butane?

Answers

Matter is made of very tiny particles. One mole of a substance contains a given amount of particles. This number is constant for all particles- 6.022×10^23 , and is called Avogadro's constant. To get the number of particles in 4g of butane, we need to calculate the number of moles represented by 4 g, then multiply by the Avogadro's constant (Since each mole has particles equivalent to the Avogadro's constant)
Therefore, if 1 mole = 58.1g
how many moles will be equal to 4g?
we cross multiply (4x1) divide by 58.1
equals 0.068847moles
multiply by Avogadro constant = 4.1466 x 10^molecules
But remember the question is not about the number of molecules in butane, its about the number of carbon atoms.
Since there are four carbons in butane, and each has 4.1466 x 10^22 atoms
to get the number of atoms, we multiply by four
equals 1.6586 x 10^atoms

$\boxed{1.657 * {\text{1}}{{\text{0}}^{{\text{23}}}}{\text{ atoms}}}$ of carbon is present in 4.00 g of butane.

Further Explanation:

The number of atoms or molecules that can be present in one mole of any substance is determined by a number, known as Avogadro’s number. The numerical value of Avogadro’s number is ${\text{6}}{\text{.022}} * {\text{1}}{{\text{0}}^{{\text{23}}}}\;{\text{units}}$ . Such units can either be atoms or molecules.

The formula to calculate the moles of ${{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}}$ is as follows:

${\text{Moles of }}{{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}} = \frac{{{\text{Given mass of }}{{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}}}}{{{\text{Molar mass of }}{{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}}}}$ …… (1)

The given mass of butane is 4.00 g.

The molar mass of butane is $58.1 \text{g/mol}.$

Incorporate these values in equation (1).

$\begin{aligned}{\text{Moles of }}{{\text{C}}_{\text{4}}}{{\text{H}}_{{\text{10}}}} &= \left( {{\text{4}}{\text{.00 g}}} \right)\left( {\frac{{{\text{1 mol}}}}{{{\text{58}}{\text{.1 g}}}}} \right)\n&= {\text{0}}{\text{.0688 mol}}\n\end{aligned}$

The number of molecules present in one mole of butane is ${\text{6}}{\text{.022}} * {\text{1}}{{\text{0}}^{{\text{23}}}}\;{\text{molecules}}$ . So the expression to calculate the number of molecules of butane is as follows:

${\text{Molecules of butane}} = \left( {{\text{Moles of butane}}} \right)\left( {{\text{Avogadro's Number}}} \right)$ …… (2)

The number of moles of butane is 0.0688 mol.

The value of Avogadro’s number is ${\text{6}}{\text{.022}} * {\text{1}}{{\text{0}}^{{\text{23}}}}\;{\text{molecules}}$ .

Incorporate these values in equation (2).

$\begin{aligned}{\text{Molecules of butane}}{\mathbf{ }}&=\left( {0.0688{\text{ mol}}} \right)\left( {\frac{{{\text{6}}{\text{.022}} * {\text{1}}{{\text{0}}^{{\text{23}}}}{\text{ molecules}}}}{{{\text{1 mol}}}}} \right)\n&= 4.143 * {\text{1}}{{\text{0}}^{{\text{22}}}}{\text{ molecules}}\n\end{aligned}$

A molecule of butane consists of four carbon atoms in it. So the number of carbon atoms can be calculated as follows:

$\begin{aligned}{\text{Atoms of carbon}}&= \left( {4.143 * {\text{1}}{{\text{0}}^{{\text{22}}}}{\text{ molecules}}} \right)\left( {\frac{{{\text{4 C atoms}}}}{{{\text{1 molecule of butane}}}}} \right)\n&= 1.657 * {\text{1}}{{\text{0}}^{{\text{23}}}}{\text{ C atoms}}\n\end{aligned}$

Learn more:

How many grams of potassium were in the fertilizer? brainly.com/question/5105904
Determine how many moles of water produce: brainly.com/question/1405182

Answer details:

Grade: Senior School

Chapter: Mole concept

Subject: Chemistry

Keywords: $4.00 \text{g}, 58.1 \text{g/mol},$ butane, C4H10, Avogadro’s number, $1.657*10^22$ C atoms, moles, one mole, chemical formula, carbon atoms, molar mass of C4H10, given mass of C4H10.

Which is an example of a beneficial mutation? ANSWERRRR HELPPP !!! choices : one that changes the color of a rabbit, allowing it to hide from predators.

one that results in lighter flower petal colors without changing the plant’s ability to reproduce

one that causes a person’s body to produce thick mucus that clogs the lungs

one that makes it easier for a corn plant to contract a disease

Answers

Mutation can be defined as the change in the genetic sequence that is hereditary. The example of beneficial mutation can be the change of rabbit color to help him hide from the predators.

What are mutagens?

The mutation can be caused by the exposure of the gene sequence to the mutagen that cause the hereditary change.

The mutagens can be UV radiation, high energy, radiation, chemicals, or environmental factors.

The beneficial mutation can be given as the mutation in which the organism has been benefitted. The change in the color pf rabbit benefit him in hiding from the predators. Thus, option A has been the example of the beneficial mutation.

Learn more about mutation here:

brainly.com/question/17106056

Answer:

Explanation:

The average atomic mass of oxygen is 15.9994 amu. The atomic masses of its three isotopes are as follows: O-16: 15.995 amu; O-17: 16.999 amu; O-18: 17.999 amu Which isotope is most likely to have the greatest abundance in nature?

Answers

The average atomic mass of an atom would be the closest to the mass of its most commonly found isotope, because if another isotope would be more common, the average would "shift" to be closer to the most common isotope.

So the answer is O-16: its mass is almost the same as the average atomic mass.

Answer:

0-16

Explanation:

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