Please help thank you (15 points)

Answer:

[tex]\boxed{\boxed {\sf 5930.0 \ mol \ CH_4}}[/tex]

Explanation:

We are asked to find how many moles of methane (CH₄)  a cow produces in a year. We must convert molecules of methane to moles of methane. We will do this using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance.

In this case, the particles are molecules of methane. There are 6.022 × 10²³ molecules of methane in 1 mole.

We will convert molecules to moles using dimensional analysis. Set up a ratio using Avogadro's Number.

[tex]\frac {6.022 \times 10^{23} \ molecules \ CH_4}{ 1 \ mol \ CH_4}[/tex]

We are converting 3.571 × 10²⁷ molecules of methane to moles, so we multiply the ratio by this value.

[tex]3.571 \times 10^ {27} \ molecules \ CH_4 *\frac {6.022 \times 10^{23} \ molecules \ CH_4}{ 1 \ mol \ CH_4}[/tex]

Flip the ratio. It is still the same value, but the units of molecules of methane cancel.

[tex]3.571 \times 10^ {27} \ molecules \ CH_4 *\frac { 1 \ mol \ CH_4}{6.022 \times 10^{23} \ molecules \ CH_4}[/tex]

[tex]3.571 \times 10^ {27} *\frac { 1 \ mol \ CH_4}{6.022 \times 10^{23} }[/tex]

[tex]\frac {3.571 \times 10^ {27}}{6.022 \times 10^{23} } \ mol \ CH_4[/tex]

[tex]5929.923613 \ mol \ CH_4[/tex]

The original measurement of molecules of methane( 3.571 × 10²⁷ molecules) has 4 significant figures, so our answer must have the same. For the number we calculated, that is the ones place. The 9 in the tenth place tells us to round the 9 in the ones place up to a 0, then the 2 in the tens place up to a 3.

[tex]5930 \ mol \ CH_4[/tex]

We must add a placeholder zero in the tenth place to reach 4 sig figs.

[tex]5930.0 \ mol \ CH_4[/tex]

The adult cow produces approximately 5930.0 moles of methane in a year.

Mendeleeve's periodic table was based on the atomic mass of each element.

The correct answer is option A: He determined the mass of atoms of each element.

The periodic table can be described as a regular arrangement of elements based on some periodic properties. The periodic table has evolved through the ages. Its patter has been changed several times before it arrived at its present form.

The  Mendeleev periodic table was based on the mass of atoms of the elements. This table was published in Russia in 1869. His table even predicted elements that were yet to be discovered.

Learn more: https://brainly.com/question/7373020

Answer:

1. He arrange the elements by different properties to find a pattern!

Here are the rest!

2.. atoms are indivisible

3.  He determined the amount of charge on an electron

4. Like charges repel and opposite charges attract

5.Alpha particle deflection

Hope this helps the ballers!

Answer:

76 ml

0.076 L

Explanation:

hope that helps

Answer:

76 for the first one at least I think

Answer:

the answer is hydrogen which is B

The substance is an element that is considerably composed of molecules known as hydrogen (H2). Thus, the correct option for this question is C.

A chemical element may be defined as a species of an atom that remarkably bears a specific number of sub-atomic particles in its structure. These elements are not further decomposed into smaller components in a chemical reaction.

H2 is also known as molecular hydrogen. It forms when two hydrogen atoms are significantly bonded to one another in order to give rise to a molecule. Water is not an element, it is a molecule. While methane is a chemical compound that possesses a chemical formula CH4. Helium (He) is a chemical element only.

Therefore, hydrogen is an element that is composed of molecules. Thus, the correct option for this question is C.

To learn more about Chemical elements, refer to the link:

https://brainly.com/question/28376204

#SPJ2

Answer:

electrons

Explanation:

the atomic number tells you the number of Drotons in one atom of an element.It also tells you the number of electrons in a neutral atom of that element. The atomic number gives the "identity" of an element as well as its location on the periodic table.

Answer:

they become more compressed with each other, forming a higher-pressure environment.

Explanation:

:)

When you pump air into the tire, it compresses the air, bringing the molecules in the air closer together.

Explanation:

Answer:

https://swartzbiotechnologylab.sites.stanford.edu/research

Explanation:

Answer:

A sodium atom can lose its outer electron. It will still have 11 positive protons but only 10 negative electrons. So, the overall charge is +1.

Answer:

none of the above answers

Answer:

The mass of Carbon-12 is exactly 12 amu. But, that is not the number that is reported in your periodic table. Carbon as it exists in nature is not all carbon-12. There is some small amount of carbon-13 and even traces of carbon-14 in there. The periodic table reports the average mass of the carbon as it is found in nature, not that of pure carbon-12. The average mass of carbon is slightly heaver than carbon-12, because of the slight amounts of those heaver isotopes of carbon in nature.

Mark me as brainliest please

Explanation:

A daily dose of 75 mg/kg of body mass of Rocephin® is equivalent to 0.034 g/lb of body mass.

In children, the maximum recommended daily dose of this medicine is 75 mg/kg of body mass. First, we will convert this dose to g/kg of body mass using the conversion factor 1 g = 1000 mg.

[tex]\frac{75 mg\ Rocephin}{kg\ body\ mass} \times \frac{1 g\ Rocephin}{1000 mg\ Rocephin} = \frac{0.075 g\ Rocephin }{kg\ body\ mass}[/tex]

Then, we will convert the dose of 0.075 g of Rocephin/kg of body mass to g of Rocephin/lb of body mass using the conversion factor 1 kg = 2.20 lb.

[tex]\frac{0.075 g\ Rocephin }{kg\ body\ mass} \times \frac{1kg\ body\ mass}{2.20lb\ body\ mass} = \frac{0.034 g Rocephin}{lb\ body mass}[/tex]

A daily dose of 75 mg/kg of body mass of Rocephin® is equivalent to 0.034 g/lb of body mass.

You can learn more about unit conversions here: https://brainly.com/question/19420601

Answer:

hope it's help you dear

Explanation:

If one drops a stone into a pond, a very rapid, thin jet of water spouts upwards. ... A cavity forms behind the object during impact on the water surface. This cavity is subsequently compressed by hydrostatic pressure, which leads to the formation of the jet

Answer:

H2O is the formula of water

Answer:

H²O is formula of water

Explanation:

2 molecule of hydrogen and 1 molecule of oxygen

Answer:

?

Explanation:

I'm very sorry I couldn't get you a answer, I haven't learned this in school.

At least not this stuff, my apologies!

The balanced equation for the decomposition by heating of iron(II) sulfate heptahydrate is FeSO₄.7H₂O —> FeSO₄ + 7H₂O.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and the total charge for each component of the reaction. In other words, both sides of the reaction have an equal balance of mass and charge.

Here, in the equation FeSO₄.7H₂O —> FeSO₄ + 7H₂O

There is one molecule of iron is given on both sides and seven molecules of water given on both sides. So this equation is balanced. When there are similar molecules present on both sides. If the count on both sides is equal then this is called a balanced equation.

Thus, the balanced equation is  FeSO₄.7H₂O —> FeSO₄ + 7H₂O.

To learn more about balanced equations, refer to the link:

https://brainly.com/question/12192253

#SPJ2

Answer:

cause the bottom part starts at 0 and the top starts at 12

Explanation:

The correct option is D The movement of basketball players on a court.

Basketball exists as a team sport in which two teams, most generally of five players each, opposing one another on a rectangular court, contest with the primary objective of shooting a basketball (approximately 9.4 inches (24 cm) in diameter) through the defender's hoop (a basket 18 inches (46 cm) in diameter mounted 10 feet (3.048 m) high to a backboard at each end of the court, while controlling the opposite team from shooting through their hoop. A field goal stands worth two points unless made from behind the three-point line when it stands worth three. After a foul, timed play stops and the player fouled or selected to shoot a technical foul is assigned one, two, or three one-point free throws. The team with the most points at the end of the game wins, but if regulation play passes with the score tied, an additional period of play (overtime) exists mandated.

Hence, The correct option is D The movement of basketball players on a court.

Learn more about Basketball  refer to

https://brainly.com/question/27123619

#SPJ2

Answer:

$1246.90

Explanation:

Since the bike lost [tex]20%[/tex]% of it's value and it now currently at $[tex]$1039[/tex], we have to do 20% * $1039 to find the amount of money lost. 20%*1039=207.8. We have to add it up to find the original value so 1039+207.8=$1246.8

Answer:

0.0325m = 3.25 cm

Explanation:

1m = 10-²cm

Answer:

3.25cm

Explanation:

a centimeter is just 1/100 of a meter

Answer:

b

Explanation:

Answer:

CH4 + 2O2 --> CO2  2H2O, Combustion Reaction

Explanation:

Answer:

A Type IV PFD is an approved device designed to be thrown to a person in the water. It is not designed to be worn. It is designed to have at least 16.5 pounds of buoyancy. The most com- mon Type IV PFD is a buoyant cushion.

Answer:

radiation

....

.

.

.

.hi how r u

Is my answer correct

Answer:

Radiation

Explanation:

Heat from the sun reaches is by the process of radiation

Answer:

When zinc is added to copper sulphate (CUSO4) solution due to more reactivity of zinc, cooper is replaced by the zinc and forms zinc sulphate. During the process, the colour of the solution changes from blue to colourless.

Answer:

Joule - J

Explanation:

As energy is defined via work, the SI unit of energy is the same as the unit of work – the joule (J).

Answer:

the answer is transverse wave

Answer: 1040 or 1.04 × 103

Explanation:

Depending on if you need to write it in scientific notation.

Hope this helps!