please help me with n4 I need help and if you don’t know the answer just don’t answer please
thanks :)

Answer:

The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw, and the wedge, although the latter three are actually just extensions or combinations of the first three.

Answer:

The most important devices that made work easier are:

The wheel

The axle

The lever

The inclined plane

The pulley

The screw

The wedge

these are known as the the "six simple machines"

Answer:

387.62, 83.33%

Explanation:

Given:

[tex]C_{12} H_{22} O_{11}(aq) + H_2O(g) -4 C_2H_5OH(1) + 4 CO_2(g)[/tex]

720g of Sucrose produces 323g ethanol.

To calculate the theoretical yield, you can use a mole-to-mole ratio. Assuming that there is excess H2O, you can calculate the theoretical yield like so:

[tex]720g C_{12}H_{22}O_{11}*\frac{1 mol C_{12}H_{22}O_{11}}{342.3g} *\frac{4mol C_2H_5OH}{1mol C_{12}H_{22}O_{11}} *\frac{46.07g}{1molC_2H_5OH} =387.62g[/tex]

An easy way to find percent yield is

[tex]\frac{Actual }{Theoretical} *100[/tex]

So, plug the numbers in.

[tex]\frac{323.0}{387.62} *100 = 83.33%[/tex]

So, the percent yield is 83.33%.

Answer:

A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

Explanation:

.......................yes...............ofc.......

In context to the question after evaluating every possible fact we conclude that waves carry energy and never carry matter, towards a dignified place to another.

This is considered true concerning all types of waves involving the sound waves, water waves, light waves, radio waves, microwaves, and x-rays. Then the correct answer for the required question is Option A.

Furthermore, there are different and distinguished types of waves. For instance

To learn more about mechanical waves

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Answer:

charge of copper.. ........mark me brainlest

Answer:

is a measure of how much light that hits a surface is reflected without being absorbed.

Explanation:

it is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that reflects all incident radiation

Answer:

The proportion of the incident light or radiation that is reflected by a surface, typically that of a planet or moon.

Answer:

If the molecules are heated further, the liquid water will become water vapor, which is a gas. Gas particles have more energy and are on average at distances from each other which are much larger than the size of the atoms/molecules themselves.

Answer:

0.72 mole of oxygen would produce 320.4 kJ of heat.

Explanation:

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (ℓ) + 890kJ

According to the equation,

2 moles of O₂ produces 890 kJ of heat

So, 0.72 moles of O₂ will produce:

Therefore, 0.72 moles of oxygen would produce 320.4 kJ of heat.

Answer:

ok let me study into this first

Explanation:

I'll answer this in a few

Answer:

Maas of sodium sulphate produced = moles×molar mass=0.06×142=8.52 gmoles\times molar\ mass=0.06\times 142=8.52\ gmoles×molar mass=0.06×142=8.52 g

Explanation:

Reaction between them is given by-

2NaOH  +H2SO4 → Na2SO4  +2H2O2NaOH\ \ +H_2SO_4\ \to\ Na_2SO_4\ \ +2H_2O2NaOH  +H2​SO4​ → Na2​SO4​  +2H2​O

Molar mass of H2SO4=98 g mole−1H_2SO_4=98\ g\ mole^{-1}H2​SO4​=98 g mole−1

Moles of sulphuric acid taken = 5.8898=0.06 mole\frac{5.88}{98}=0.06\ mole985.88​=0.06 mole

Moles of sodium hydroxide taken = 6.240=0.155 mole\frac{6.2}{40}=0.155\ mole406.2​=0.155 mole

here sulphuric acid is limiting agent so

reaction will proceed according to sulphuric acid

0.06 mole HSO4 will produce same amount of  Na2SO40.06\ mole\ H_SO_4\ will \ produce\ same\ amount\ of \ \ Na_2SO_4\\0.06 mole HS​O4​ will produce same amount of  Na2​SO4​

Answer:

She breached the feudal customs of the time, which hindered women's rights, by working to educate herself in subjects such as astronomy, mathematics, geography, and medicine. She was well known for her contributions in astronomy, mathematics, and poetry.  Zhenyi was a famous female scientist from the Qing dynasty.

Hope this helps have a good day. :)

What do you want for the answer the balance equation?

Answer:

the sun

Explanation:

Answer:

Warmer air can hold more water vapor than colder air.

Explanation:

Weather can be defined as the atmospheric conditions of a particular area over a short period of time.

The elements of weather include precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed.

Temperature can be defined as a measure of the degree of coldness or hotness of a physical object (body).

On the other hand, humidity refers to the concentration (amount) of water vapor that is present in the air. It is high when there's a lot of water vapor in the air and low when the level of water vapor is small.

The relationship between air temperature and humidity is that warmer air can hold more water vapor than colder air because as the air cools, its molecules move closer together while the molecules move farther apart as the air become hot.

Additionally, at constant humidity, relative humidity is inversely proportional to temperature i.e as the temperature decreases, relative humidity increases.

Answer:

disagree it wont be the same momentum

Explanation:

cuh

Answer:

5 moles of Sodium are required to produce 5 moles of Sodium Chloride.

Explanation:

I am assuming you were not given an equation and this is a synthesis reaction.

Let's begin by writing a balanced chemical equation for the synthesis of sodium chloride.

2Na⁺ + Cl₂⁻ -> 2NaCl

Since Cl₂ exists as a diatomic molecule, we must have 2 +1 charges from Na to balance out the 2 -1 charges of Cl₂ (-1 for each Cl atom). This will then form 2 moles of NaCl.

To produce 5 moles of sodium chloride, we can multiply the entire equation by 2.5. This will result in:

5Na⁺ + 2.5Cl₂⁻ -> 5NaCl

The stoichiometric ratios of this new equation is:

5 Na: 2.5 Cl₂: 5NaCl

5 moles of sodium (Na) are required to produce 5 moles of sodium chloride (NaCl).

Answer:

it is magnesium and barium and calcium

Magnesium, Barium, and Calcium will bond ionically with chlorine such that the formula would be written as MgCl₂,  BaCl₂, and  CaCl₂.

Ionic compounds can be explained as crystalline solids which are formed by packing of opposite charge ions due to the interactions of the ions. An Ionic compound is produced when metal reacts with non-metal.

In ionic compounds, oppositely charged ions are held by ionic bonds due to the interactions between ions. The ions are formed from atoms by gaining or losing electrons in order to attain their noble gas configuration.

A cation in ionic compounds is the electropositive ion and has the tendency to give away valence electrons. Similarly, anions in ionic compounds are electronegative ions and have a tendency to gain electrons.

The chlorine needs one electron to complete its valence shell. Therefore two chlorine will combine with a divalent cation. Therefore Magnesium, Barium, and Calcium exist as Mg⁺², Ba²⁺ , and Ca²⁺.

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We often denote oxygen as 16O8 where 16 is the mass number and 8 is the atomic number.

number of neutrons=16-8=8

Answer:

equal to

Explanation:

The law of conservation of mass tells us that during a chemical reaction, matter cannot be created or destroyed, but it can change from one form to another. This means that while atoms can rearrange themselves into new substances during a reaction, the mass of the reactants and products will be the same.

3.14159, this is π

Followed by 2-6-5-3-5-8-9

Circumference over diameter

7-9, then 3-2-3

OMG! Can't you see?

8-4-6-2-6-4-3

And now we're on a spree

38 and 32, now we're blue

Oh, who knew?

7, 950 and then a two

88 and 41, so much fun

Now a run

9-7-1-6-9-3-9-9

Then 3-7, 51

Half way done!

0-5-8, now don't be late

2-0-9, where's the wine?

7-4, it's on the floor

Then 9-4-4-5-9

2-3-0, we gotta go

7-8, we can't wait

1-6-4-0-6-2-8

We're almost near the end, keep going

62, we're getting through

0-8-9-9, on time

8-6-2-8-0-3-4

There's only a few more!

8-2, then 5-3

42, 11, 7-0 and 67

We're done! Was that fun?

Answer: 70.0 g  = .53 mol  

Q = 250g (+ 1.02) 4.18

Q = 1065. 9 J / 1000 = 1.0659 kJ

1.0659/ .53 = 2.01 kJ/ mol

Answer: 2.01 kJ/ mol

Explanation:

Heat can be transferred from the hotter water to metal causing the metal to melt.

The question is incomplete but I will try to give you a general overview. Now, we know that heat can be transferred from one body to another.

Hence, heat can be transferred from the hotter water to metal causing the metal to melt. When the metal melts, the system will now attain an equilibrium temperature.

Learn more about heat transfer: https://brainly.com/question/9904853

Answer:

I hope this will help you....and please mark me as Brilliant

Explanation:

1 moles N2 you can produce 2 moles of NH3, (see equation)

5 mol N2 gives 10 mole NH3

molar mass of NH3 = 17.03 g/mole

10 moles NH3 is 10 * 17.03 gram = 170.3 gram NH3.

Balanced equation:

N2(g) + 3 H2(g) → 2 NH3(g)

Answer:

Electrons

Explanation:

Answer:

Due to the limited supply of oxygen, carbon (ii) oxide, a poisonous gas, is produced instead of carbon(iv) from the burning charcoal stove and this may result in death when inhaled.

Explanation:

When charcoal is burnt in a plentiful supply of oxygen, the combustion products is carbon (iv) oxide (carbon dioxide) which is not very toxic to the human body. The equation of the reaction is given below:

C + O₂ ----> CO₂

However, in a limited supply of oxygen gas, the combustion product is carbon  (ii) oxide. The equation of the reaction is given below:

2C + O₂ ----> 2CO

Carbon (ii) oxide is a colorless and odorless gas which unlike carbon (iv) oxide is very toxic to human and results in fatality when inhaled in even small doses for a few minutes. Its mechanism of action of toxicity is that it competes with oxygen for transport in the body by hemoglobin. It combines irreversibly with hemoglobin to form carboxyhemoglobin, thereby depriving tissues and cells the oxygen they need. This results in death of the cells and tissues as well as of the whole organism. Thus, it is not advisable to light a charcoal stove in limited supply of oxygen.

Answer:

No

Explanation:

Gelatin is a substance that makes jello, and a fruit cup is a cup full of fruit

Answer:

no

Explanation:

Answer:

Cosimo

Explanation:

Answer:

O mosses

Explanation:

Answer:

lol

Explanation:

Answer:

I think its B maybe

Explanation: