PLEASE ANSWER SCIENCE

A velocity/time graph would look like with no acceleration is the straight line with zero slope

Here the given data is related with the concept and fundamental of velocity/time graph and the graphical representation where the velocity of an object is concluded with respect to the time is known as velocity-time graph

Therefore the given case in the graph is straight line with zero slope means no acceleration

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Answer:

C

Explanation:

got it right

Answer: yes

Explanation: no

Answer:

Explanation:

500 = 60 * ?  

500/60 = ?

8.33333333333 = ?

so it's 8 and one third  :)

The volume of carbon dioxide gas produced will be 23.3mL

SrCO (s) + 2HCl(aq) → SrCl₂(aq) + CO₂(g) + H₂O(l)

Here concentration of the strontium carbonate is in excess and the concentration of HCl is 25mL having molarity 0.1072 M

Number of moles of HCl= mass/ molar mass,

Molar mass of HCl= mass/ Number of moles

Molar mass of HCl= 36.5

Mass of HCl from balanced equation= 2×36.5=73

Molarity= Number of moles/ volume

According to stoichiometry the moles of HCl is 2 and that of  CO₂ is 1.

We know that,

PV =nRT

1.05× V= 1 ×0.0821× 298

V= 0.0821×298/ 1.05

= 23.3 mL

By ideal gas equation, volume of carbon dioxide is calculated as 23.3 mL.

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Answer:

A

Explanation:

2 mol HgO : 1 mol O2

1 mol HgO is 216.589 grams

2 mol HgO is 433.178 grams

433.178 grams HgO : 1 mol O2

(0.726) 433.178 grams HgO : (0.726) 1 mol O2

314.4 grams HgO : 0.726 mol O2

or just 314 grams

In the reaction Ba(ClO₃)₂ → BaCl₂ + 3O₂, the valance electrons of Ba will be 2.

The given reaction is Ba(ClO₃)₂ → BaCl₂ + 3O₂

This reaction is a kind of decomposition reaction, barium chlorate breaks down into barium chloride and three moles of oxygen.

Barium possesses two outer shell/valency electrons, as seen by the subscripts of the components in the compound [tex]BaCl_{2}[/tex]. The two chlorine atoms receive two of these outside electrons from it. To comply with the octet rule, any chlorine gets one electron from barium.

Therefore, the valance electrons of Ba will be 2.

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Option c . The composition of matter and how it changes.

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Enzymes known as transfer RNA (tRNA) synthetases are responsible for joining a particular amino acid to its associated tRNA in order to produce proteins at the ribosome.

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0.25g/L is the concentration of Ca(OH)2 in the bottle when 20 ml of water and 20 ml of 0.50 g/l Ca(OH)2 is added into a bottle.

Concentration in chemistry is the measure of the constituent divided by the volume of the mixture.

Ca(OH)2 stands for Calcium hydroxide formed by the action of water on the calcium.it is used in forming a solution ,named limewater. it is also called as Slaked lime

Acc. to the given data:

c1=0.50g/l

v1=20ml=0.020L

c2=?

v2=20ml+20ml=40ml=0.040L

now we use the equation

c1v1=c2v2

rearranging the above equation

c2=c1*v1/v2

putting values

c2=0.50*0.020/0.040

c2=0.25g/l

Hence, 0.25g/L is the concentration of Ca(OH)2 in the bottle when 20 ml of water and 20 ml of 0.50 g/l Ca(OH)2 is added into a bottle.

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Answer:

I think C

Explanation:

don't forget to follow rate like

Answer:yes but yes

Explanation:yes

Answer:

A b/c aluminum

Explanation:

don't forget to follow rate like

In the reaction H₂ + I₂ --> 2HI, the hydrogen undergoes oxidation.

The balanced given chemical reaction is :

H₂ + I₂ --> 2HI

The oxidation state of Hydrogen is increased from 0 to +1 and the increase in oxidation number is called as oxidation. The loss of electrons is called as oxidation.

The oxidation state of iodine is decreased from 0 to -1 and the decrease in the oxidation state is called as the reduction. The gain of electrons is called as the reduction.

oxidation = Hydrogen , Reducing agent = hydrogen

reduction = Iodine , oxidizing agent = Iodine

Thus, In the reaction H₂ + I₂ --> 2HI, the Hydrogen undergoes oxidation.

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In order to properly balance an equation, we need to make sure that the same amount of elements on the reactants side matches the number of elements on the products side, we can do that by increasing the number in front of each molecule, the so called stoichiometric coefficient. In the reaction from the question we can properly balance by adding the following stoichiometric coefficients

1. 2 H2 + O2 -> 2 HO2

2. FeCl2 + H2O -> FeO + 2 HCl

3. C4H8 + 6 O2 -> 4 CO2 + 4 H2O

4. ?

5. 2 NaOH + MgCl2 -> 2 NaCl + Mg(OH)2

Answer:

Mixtures are formed by mixing two or more substances physically such that no chemical reaction takes place between the components.

A drop of ink will spread faster as higher the temperature is. The higher the temperature, the more agitated the molecules will be, so they will move faster. So the mobility of the particles is related to their temperature.

So:

Particles in Flask C show the greatest mobility of the particles, this flask will have the highest temperature.

Particles in Flask A show the least mobility, this flask will have the lowest temperature.

Answer:

Flask A 10°C

Flask B 25 °C

Flask C 50 °C

The mobility of the particles is related to their temperature. The particles in Flask A show the least mobility, and the particles in Flask C show the greatest mobility.

Flecainide, propafenone, and moricizine are unique in that they have no effect on the repolarization phase but all the above three do decrease conduction in the ventricles.

A class 1c anti-arrhythmic drug known as propafenone, which is also marketed under the name Rythmol, is used to treat conditions like atrial and ventricular arrhythmias that are linked to rapid heartbeat.

Moracizine, sometimes known as moricizine, is a class IC antiarrhythmic that is marketed under the trade name Ethmozine. It was discontinued in 2007 for commercial reasons after being used for the prevention and treatment of significant and life-threatening ventricular arrhythmias.

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24.90 moles of carbon dioxide are formed if 8.30 moles of propane (c3h8) is burned in air (so oxygen won't run out).

A three-carbon alkane, propane has the chemical formula C3H8. At room temperature and pressure, it is a gas, but it can be compressed into a liquid for transportation.

Given:

8.30 moles of propane

Combustion reaction will be

   C3H8+5O2→3CO2+4H2O

Now from the above reaction it is clear that 1 mole of propane after combustion produces 3 moles of CO2

So 8.30moles of propane will produce

8.30*3molesof CO2/1Mole of C3H8=24.90 moles

Hence,24.90 moles of carbon dioxide are formed if 8.30 moles of propane (c3h8) is burned in air (so oxygen won't run out).

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2.12 × 10²⁵ number of molecules are present in 7. 05 moles of pyridine.

Pyridine- A nitrogen atom has been added in lieu of one of the -CH groups in the benzene core to create pyridine, an azaarene. It belongs to the family of compounds known as pyridines. It plays a part in contaminating the environment. It is an organic heteromonocyclic mancude parent, an azaarene, a monocyclic heteroarene, and a member of the pyridine family.

Avogadro's number, which is equal to 6.02214076 × 10²³, is the quantity of units in one mole of any material (defined as its molecular weight in grams). Depending on the substance and the nature of the reaction, the units may be electrons, atoms, ions, or molecules (if any)

Given that there are 7.05 moles of pyridine,

The C₅H₅N has a molar mass of 79 g/mol.

One pyridine molecule contains five carbon atoms.

The number of molecules in one mole of pyridine is 5×6.022 10²³.

The number of molecules in 7.05 moles of pyridine are therefore equal to 7.05 × 5 × 6.022 10²³.

⇒ 2.12 × 10²⁵ number of molecules.

Hence, 2.12 × 10²⁵ number of molecules are present in 7. 05 moles of pyridine.

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Answer: 1,2,1,2

Answer:

1,2,1,2

Explanation:

See attached worksheet.  Balancing equations requires some organization and a pencil for making many changes in the process of finding the correct coefficients.  Add a litttle patience is required, but discovering the solution can be fun

The complete combustion of octyne has the form of the following equation:

To balance the equation, we need to count the atoms of each element before and after the reaction occurs. If this number is the same for each type of atom, the reaction is balanced.

Let's start counting:

As you can see, the reaction is not balanced. To balance, we could change the coefficients of each compound in order to count again a lot of times. Doing this, the balanced reaction would be:

The coefficient in front of O2 when the reaction is properly balanced is 23.

the answer is cold front

Answer:

exaggerate

Explanation:

There are many possible verbs for this.  I suggest exaggerate, but one many also consider:

"make a false claim"

"misrepresent"

Answer:

Divide the distance the object traveled by the time it took to get there.

Explanation:

To calculate the speed on an object, start by determining how far the object has traveled. Next, figure out the amount of time that the object took to cover that distance. Finally, divide the distance the object traveled by the time it took to get there. Don't forget to label the speed with the correct units of measurement.

Answer:

False

Explanation:

Biotic factors are those parts of the environment that are living such as humans, bacteria, fungi and protists.

Abiotic factors are those parts of the environment that are non-living.

An ionic bond forms when any element transfers its valence electron permanently to the reactant one to form a mutual bond. the atom which transfer the electron becomes positively charged atom and the one which takes the electron becomes negatively charged.

A negatively charged electron located in the outermost shell of the atom is termed as valence electron.

Positively charged atom means the atom having more no of protons then electron in  its nucleus and have symbol such as [tex]X^{+}[/tex].

An ionic bond forms when any element transfers its valence electron permanently to the reactant one to form a mutual bond. the atom which transfer the electron becomes positively charged atom and the one which takes the electron becomes negatively charged.

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Answer:

Explanation:

A solid dissolves in a liquid when it mixes completely with the liquid. The solid has broken down into pieces so small that its particles spread all throughout the new mixture. The solid and liquid will stay mixed without shaking. Everything dissolves in water.

hope it helps!

Yes, the eqⁿ is balanced.

Explanation:

The reaction between hydrogen and oxygen results to the formation of water.

[tex]{ \purple{ \sf{2 H₂ + 1 \: O ₂ \: ➪ \: 2 H₂O}}}[/tex]

To check whether the eqⁿ is balanced, let us count the numbers in the reactant and product sides

L.H.S.

H = 2×2 = 4.

O = 2×1 = 2.

R.H.S.

H = 2×2 = 4

O = 2×1 = 2.

Hence it is a balanced chemical equation.

Answer : yes ,it is balanced so your answer should look like this with the state symbols

2H2(g)+O2(g)→2H2O(l)

Hyperconjugation makes the alkanes more stable than less substituted alkanes.

Hyperconjugation refers to the delocalization of electrons with the primary sigma bonds. Usually, hyperconjugation involves the interaction of the electrons in a sigma orbital for example C–H or C–C with an adjacent unpopulated non-bonding p or antibonding σ* or π* orbitals to give a pair of extended molecular orbitals.

  It suggests a key factor in shortening of sigma bonds (σ bonds). For example, the single C–C bonds in 1,3-butadiene and propyne are approximately 1.46 Å in length, much less than the value of around 1.54 Å found in saturated hydrocarbons. For butadiene, this can be explained as normal conjugation of the two alkenyl parts. But for propyne, it is generally accepted that this is due to hyperconjugation between the alkyl and alkynyl parts.

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Answer:

Explanation:

Here, we want to write the equilibrium constant expression

Generally, to write this, we exclude non-gaseous molecules

We simply put divide the concentration of the products (in square brackets) raised to the number of moles divided by that of the reactants raised to the number of moles too

For the given equation, we have the expression as: