How many moles of oxygen are required to make 4 moles of water?​

Answer:

In an ionic bond, metals lose electrons to become Cations.

Explanation:

Metal atoms lose electrons to form positive ions (cations).

Answer:

mutual relationship

Explanation:

pls mark brainliest

Answer:

Sry i accidently clicked on ''SAVE''.

U can remove it or report it...

Explanation:

19. For the reaction, 2S+ 30=2SO3, how many moles of so3 will be produced from 12.5 g 02 and excess S?

:

For the reaction: 2S(s) + 3O2 -> 2SO2(g) How many moles of SO3 will be produced from 2.0 mol O2 and excess S?

Answer:

Explanation:

19. For the reaction, 2S+ 30=2SO3, how many moles of so3 will be produced from 12.5 g 02 and excess S?

Answer:

C

water has undergone a phase change and the composition of a substance was not changed

The stopcock is the uncalibrated portion of a burette.

A burette is an instrument use in quantitative analysis which has opening at both ends and a tap at one end and it is use to measuring volume of liquid in the laboratory.

Therefore, The stopcock is the uncalibrated portion of a burette.

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Energy is the fundamental need for lives. Fossil fuel is the energy source that is most needed in society. It is now replaced with solar energy as fossil fuels are nonrenewable resources.

Nonrenewable resources are energy sources that are finite in amount and get depleted after some time as it takes millions of years to produce these resources. Fossil fuels though are needed but are nonrenewable and cause pollution.

Solar energy is a renewable source that is present in abundant and infinite quantity and does not get depleted fast after they are used excessively. They are also environmentally friendly and do not produces much pollution.

Therefore, fossil fuel and solar energy are the most demanded sources.

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Answer:

0.14376 moles O₂

Explanation:

To find the amount of moles lost, (1) convert the grams O₂ before to moles (via molar mass from periodic table), then (2) convert the grams O₂ after to moles, then (3) subtract the moles O₂ after from the moles O₂ before.

Molar Mass (O₂) = 2(15.999) g/mol

Molar Mass (O₂) = 31.998 g/mol

Before Experiment:

1,027.8 grams O₂             1 mole O₂
--------------------------  x  ----------------------  = 32.121 moles O₂
                                      31.998 grams

After Experiment:

1,023.2 grams O₂           1 mole O₂
--------------------------  x  ----------------------  = 31.977 moles O₂
                                     31.998 grams

Moles Before - Moles After = Moles Lost

32.121 moles - 31.977 moles = 0.14376 moles O₂

The number of significant figures is determined by the significant figures of the values given. Both of the given values (1,027.8 and 1,023.2) have 5 sig figs. Therefore, the answer should also have 5 sig figs.

Answer:

[tex]\boxed{N_t =0.1953125 \: grams}[/tex]

Explanation:

Formula:

[tex]N_t = N_0( { \frac{1}{2} })^{ \frac{t}{t_ \frac{1}{2} } } [/tex]

Where Nt is the amount of substance remaining after time t,

N0 is the amount of substance at time t = 0,

t is the time at which we have to find out how much substance disintegrated from t = 0 to t = t

& t_1/2 is the half life corresponding radioactive sample.

Given:

N0 = 200g

t= 40 days

t1/2 = 4 days

To find:

Nt =?

Solution:

Substituting given data in above formula,

[tex]N_t = N_0( { \frac{1}{2} })^{ \frac{t}{t_ \frac{1}{2} } } \\ N_t = 200( { \frac{1}{2} })^{ \frac{40}{4 } } \\ N_t = 200 \times 0.0009765625 \\ \boxed{N_t =0.1953125 \: grams} [/tex]

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Answer:

D. has characteristics between conductor and insulator

The iron filings react with copper sulfate, the copper is displaced and iron sulfate results.

The reaction between iron filings and copper sulfate is represented by the equation below:

[tex]Fe + CuSO_4--- > FeSO_4 + Cu[/tex]

The iron filings displace the copper from copper sulfate to form iron sulfate.  Thus, elemental copper and iron sulfate are formed.

Iron is able to displace copper from copper sulfate because iron ranks higher than copper in the reactivity series.

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Answer:

Communication skills are the abilities you use when giving and receiving different kinds of information. Some examples include communicating new ideas, feelings or even an update on your project. Communication skills involve listening, speaking, observing and empathising. It is also helpful to understand the differences in how to communicate through face-to-face interactions, phone conversations and digital communications like email and social media.

Explanation:

Answer:

The definition. Communication skills enable individuals to understand others and to be understood themselves. A variety of aspects are important in the context of these skills, such as listening, speaking, observing and empathy.

Answer:

I'm pretty sure by type and size (I might be wrong).

[tex]^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e[/tex]  is the nuclear equation for the beta decay Ni-60.

Beta-decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other.

The nuclear equation for the beta decay Ni-60

[tex]^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e[/tex]

In beta minus (β−) decay, a neutron is converted to a proton, and the process creates an electron and an electron antineutrino; while in beta plus (β+) decay, a proton is converted to a neutron and the process creates a positron and an electron neutrino. β+ decay is also known as positron emission.

Hence, [tex]^6^0_2_7CO\;\rightarrow\;^6^0_2_8Ni\;+\;^0_-1e[/tex]  is the nuclear equation for the beta decay Ni-60.

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The container that has lowest temperature will store more amount of gas as compared to high temperature container.

At lowest temperature, the container stored the large amount of gas because at lower temperature the gases contract so more space is available for the storage of more gases.

So we can conclude that the container that has lowest temperature will store more amount of gas as compared to high temperature container.

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Answer:

the answer is D because they should be asking a question instead of wondering how long the ad is hope this helped.

…Answer:

Explanation:

Answer:

-

Explanation:

As the piece of metal skitters across the surface of the water in a beaker and — particularly in the case of potassium — it appears to catch fire, it is not obvious that the explanation for both phenomena lies in the production of hydrogen gas.

Answer:

1.6 x 10^4

Explanation:

16,340

with 2 significant figures is

16000

in scientific notation

is 1.6 × 10^4

because 10^4 means

if you move the decimal point 4 spaces then

1.6 becomes 16000

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Answer:

The answer is False beacuse, plant are called producers because they make their own food.

Answer:

soft water can leath with soap whiles hard water cannot be leathers with soap

Answer:

Hard water is water with excess calcium and magnesium, while soft water lacks harsh minerals that can hurt your body.

Explanation:

Also, in hard water, soap is not so effective (little or no foam) and in soft water soap is easily effecive (foams easily).

Answer:

About 21.7 grams.

Explanation:

To find the mass of a sample of sodium chlorate (NaClO₃) given the amount of particles present, we can convert from particles to moles, and moles to mass using its molecular weight.

The molecular weight of sodium chlorate is:

[tex]\displaystyle \begin{aligned} \mathcal{M}_\text{NaClO$_3$} &= (22.99 + 35.45 + 3(16.00)) \text{ g/mol} \\ \\ & = 106.44\text{ g/mol} \end{aligned}[/tex]

And recall that in one mole of any substance, there are 6.02 × 10²³ of it. Hence:

[tex]\displaystyle \begin{aligned} 1.23\times 10^{23} \text{ NaClO$_3$} &\cdot \frac{1\text{ mol NaClO$_3$}}{6.02\times 10^{23}\text{ NaClO$_3$}} \cdot \frac{106.44\text{ g NaClO$_3$}}{1\text{ mol NaClO$_3$}} \\ \\ &= 21.7 \text{ g NaClO$_3$} \end{aligned}[/tex]

In conclusion, there are about 21.7 grams of sodium chlorate.

d) This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

The relationship between the pressure and the volume of the gas at a constant temperature is given by Boyle's law. The volume, of the gas at  170.8 kPa is 126.70 mL.

Boyle's law states the inverse relationship between the pressure and the volume of the gas. The formula for the law can be given by:

[tex]\rm P_{1}V_{1} = P_{2}V_{2}[/tex]

Given,

Initial pressure = 165.2 kPa

Initial volume = 131.0 mL

Final pressure = 170.8 kPa

The final volume is calculated as:

165.2 * 131.0 = 170.8 * V

V = 126.70 mL

Therefore, the final volume of the gas is 126.70 mL.

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This is because convection is energy transfer by currents of moving liquid or gas.

Heat transfer by convection is the transfer of heat from one place to another due to the movement of fluid.

When cooking in a convection oven, for best results you place your food in the center of the oven, this is because convection is energy transfer by currents of moving liquid or gas.

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This is because convection is a type of energy transfer by currents of moving liquid or gas (Option A).

Convection is a physical natural phenomenon associated with energy transfer through a fluid.

In convection, a suitable fluid that produces what transfer can be for example air and/or water.

In conclusion, this is because convection is energy transfer by currents of moving liquid or gas (Option A).

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Answer:

Use a catalyst, use more reactants, have a larger reactant surface area, more pressure, higher temperature.

Explanation:

Answer: Heyaa! ~

A constant in an investigation is a quantity

that does not change...

Hopefully this helps you! ^^

Answer:

It is harmful gas which cause global warming