Two or more atoms chemically bonded together are called

c. H-I>Se-N>Cl-F

that is the answer i think...

Answer:

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221 grams is the mass of oxygen gas is consumed in a reaction that produces 4.60 mol sulfur dioxide

The given question is incomplete as it lacks a chemical reaction, however, the chemical reaction is :

Hydrogen sulfide gas burns in oxygen to produce sulfur dioxide and water vapor.

[tex]2H_2S(g)+3O_2(g)\rightarrow 2SO_2(g)+2H_2O(g)[/tex]

Explanation:

Given:

The chemical reaction:

[tex]2H_2S(g)+3O_2(g)\rightarrow 2SO_2(g)+2H_2O(g)[/tex]

To find:

Mass of oxygen gas consumed in a reaction to produce 4.60 moles of sulfur dioxide gas.

Solution:

The moles of sulfur dioxide gas produced =4.60 mol

[tex]2H_2S(g)+3O_2(g)\rightarrow 2SO_2(g)+2H_2O(g)[/tex]

According to a chemical reaction, 2 moles sulfur dioxide is obtained from 3 moles of oxygen gas, then 4.60 moles of sulfur dioxide will be obtained from:

[tex]=\frac{3}{2}\times 4.60mol=6.9\text{ mol of }O_2[/tex]

Mass of 6.9 moles of oxygen gas:

[tex]6.9 mol\times 31.998 g/mol=220.79 g\approx 221 g[/tex]

221 grams is the mass of oxygen gas is consumed in a reaction that produces 4.60 mol sulfur dioxide.

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Answer:

Crude oil is refined to make petrol (in America this is known as gasoline) or diesel. Most forms of transport use either petrol or diesel to power their engines - from lawnmowers, cars, buses and motorbikes to large ships and aeroplanes.

Answer:

OB heat

Explanation:

Hope this helps

Answer:

I will use pulley b

Explanation:

because the pulley with more efficency can carry out the work better

Answer:

B

Explanation:

Answer:

CAN U HELP ME

Explanation:

PLS

Answer:

apply

does not

does not

does not

Explanation:

The Second Law of Thermodynamics is applicable to only a reaction vessel that is  completely sealed and insulated as the entropy remains constant during such chemical change.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

The last answer is right they get half of the mothers genes and half of the fathers genes.

Answer:

Gold is a metal lol

Explanation:

Chemically, gold is a transition metal and a group 11 element

Answer:Phosphate

Explanation:It is called phosphate because of this higher state (otherwise it would be called phosphite and be PO3+3 ).

The set of explanations that has the correct representation for the chemical equation are aq and g. Thus the correct options are 3 and 4.

The chemical equation has been written with the symbols of the product and the reactant. The chemical equation has the moles of an element that has been reacted. The moles have written prior to the compound as the coefficient.

The compounds state has also been present in the chemical equation. The compounds in the reaction can be present as:

The symbol has been added to the compound to depict the state of the compound in the chemical reaction. The symbols used for the following states are:

The set of explanations that has the correct representation for the chemical equation are aq and g. Thus the correct options are 3 and 4.

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Answer:

286

Explanation:

see ur periodic table

[tex]KNO3 (s)[/tex]  → [tex]K+ (aq) + NO_3^- (aq)[/tex] is an endothermic reaction and entropy decreasing.

An endothermic reaction is any chemical reaction that absorbs heat from its environment.

This reaction  [tex]KNO3 (s)[/tex]  → [tex]K+ (aq) + NO_3^- (aq)[/tex] is absorbing heat from the surrounding. Endothermic reactions are characterized by positive heat flow (into the reaction) and an increase in enthalpy (+ΔH).

It will lower the entropy of the surroundings by absorbing energy. In doing so the surroundings will lose energy, and randomness is decreased. These reactions are not spontaneous.

Hence, option B is correct.

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Answer:

red

Explanation:

The more energy a wave has, the higher its frequency, and vice versa. When it comes to visible light, the highest frequency color, which is violet, also has the most energy. The lowest frequency of visible light, which is red, has the least energy.

Answer:

Savannas are grasslands found in Africa, Australia, South America, and India. The climate is warm or hot. Savannas experience both dry and rainy seasons. Each year, savannas receive about 20 to 50 inches of rain in a span of six to eight months. The other months are dryer. There’s also a threat of wildfires because of the severe dryness during these months. Grasslands are true to their name because their vegetation is mostly grass. Savannas are home to a wide range of animals, including different species of beetles and insects, which many creatures consume. Squirrels, mice, elephants, gazelles, and antelopes are the plant-eating animals that live in the savanna. Hyenas, lions, and leopards are some of the meat-eating animals in these areas. Some of the nonliving components of the system include very porous soil that allows water to drain easily.

Explanation:

this is the edmentum answer    :)

Answer:

.

Explanation:

Answer:

Ionic bonds are usually between a metal and a nonmetal and involve the transfer of electrons. Covalent bonds are typically between two nonmetals and involve the sharing of electrons.

Explanation:

When elements bond together ionically, they transfer their valence electrons to another element to satisfy the octet rule and create full shells of 8 electrons. Metals usually have low electronegativity and ionization energy and can more easily give up an electron to a nonmetal with higher electronegativity and ionization energy.

When two nonmetals bond, their electronegativities are close enough in magnitude that neither element can "claim" the valence electrons, so the electrons orbit back and forth between the elements in the bond.

Answer:

True

Explanation:

If you cover cup in soap it will be a lot more slippery than it was before, if you reshaped a car wheel to have less treads then it would have much less friction.

Answer:

Nitrous oxide,Sulfur trioxide,  Lithium oxide, Lithium oxide,Aluminium oxide, Dichlorine monoxide, Sulfur dioxide, Chromium trioxide, Magnesium oxide,Dichlorine Pentoxide, Potassium oxide, Barium oxide

Explanation:

Answer:

Temperature is a measure of "average kinetic energy" of the particles in an object

Answer:

39.6 g

Explanation:

The equation of the reaction is;

2Mg(s) + O2(g) --------> 2MgO(s)

To obtain the limiting reactant;

Number of moles in 26.4 g of Mg = 26.4g/24 g/mol = 1.1 moles

If 2 moles of Mg yields 2 moles of MgO

1.1 moles of Mg yields 1.1 * 2/2 = 1.1 moles of MgO

Number of moles in 26.4 g of O2 = 26.4 g/32g/mol = 0.825 moles

If 1 mole of O2 yields 2 moles of MgO

0.825 moles of O2 yields 0.825 moles * 2/1 = 1.65 moles of MgO

Hence Mg is the limiting reactant.

Theoretical yield of MgO = 1.1 moles of MgO * 40 g/mol = 44 g

Percent yield = 90%

Percent yield = actual yield/theoretical yield * 100

Actual yield = Percent yield * theoretical yield/100

Actual yield = 90 * 44/100

Actual yield = 39.6 g

Answer:

10.54 M

Explanation:

First you multiply 154.9 by 262 to get the mols and then you divide that number by 3850.45540796906 L and you get 10.54 M.

Answer:

Bacteria

Explanation:

Answer:

HF is the limiting reactant

Explanation:

The balanced equation for the reaction is given below:

SiO₂ + 4HF —> SiF₄ + 2H₂O

From the balanced equation above,

1 mole of SiO₂ reacted with 4 moles of HF.

Finally, we shall determine the limiting reactant. This can be obtained as illustrated below:

From the balanced equation above,

1 mole of SiO₂ reacted with 4 moles of HF.

Therefore, 7.5 moles of SiO₂ will react with = 7.5 × 4 = 30 moles of HF.

From the calculation made above, we can see clearly that it will take a higher amount (i.e 30 moles) of HF than what was given from the question (i.e 5 moles) to react completely with 7.5 moles of SiO₂.

Therefore, HF is the limiting reactant and SiO₂ is the excess reactant.

Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you. The protons and neutrons cluster together in the central part of the atom, called the nucleus, and the electrons 'orbit' the nucleus.

Hope this helped!

Answer:

1 mole of a gas would occupy 22.4 Liters at 273 K and 1 atm

Explanation:

An ideal gas is a set of atoms or molecules that move freely without interactions. The pressure exerted by the gas is due to the collisions of the molecules with the walls of the container. The ideal gas behavior is at low pressures, that is, at the limit of zero density. At high pressures the molecules interact and intermolecular forces cause the gas to deviate from ideality.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

Reemplacing:

1 atm* 22.4 L= n* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] *273 K

Solving:

[tex]n=\frac{1 atm* 22.4 L}{0.082 \frac{atm*L}{mol*K} *273 K}[/tex]

n= 1 mol

Another way to get the same result is by taking the STP conditions into account.

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C (or 273 K) are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

1 mole of a gas would occupy 22.4 Liters at 273 K and 1 atm

Answer:

D

Explanation: Trust me

The triple beam balance measures the mass of an object in grams.

Explanation:

           Middle beam = Increments of 100 grams

           Front beam = Increments from 0 grams  to 10 grams

           Farther beam = Increments of 10 grams

So, from this, we can conclude that the triple beam balance measures the mass of an object in grams. Hence the correct answer is option A.

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