What does this picture represent?
A.
Volumetric flask
B.
Erlenmeyer flask
C
Graduated cylinder
D.
Beaker

Answer:

Selenium

adadadadad

Explanation:

if u ask which group

so it is halogen

or u ask which type of matter

then liquid

Answer:

remain at rest

Explanation:

Answer:

a

Explanation:

The object with greater mass is having greater kinetic energy. Here, all the objects has the same velocity therefore, the bicycle is having least kinetic energy.

Kinetic energy is a form of energy generated by virtue of the motion of the object. The kinetic energy is related to the mass and velocity of the body by the expression below:

KE = 1/2 mv².

As per this equation, kinetic energy increases with an increase in mass or/ and velocity. The substance with greater mass is possessing the greater kinetic energy.

A dump truck has greater mass than a car and bicycle. Thus, at the same velocity for all, the greater kinetic energy is for the truck and the least kinetic energy is for the bicycle having the least mass here. Thus, option A is true.

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Answer:

You need the mass composition of the compound.

This composition works fine for the formula mass 150 amu.

C: 40.0%

H: 6.7%

O: 53.3%

From that, you can solve the problem following theses steps:

1) Convert mass composition fo molar ratios by dividing ech element by its atomic mass =>

C: 40.0 / 12 = 3.33

H: 6.70 / 1 = 6.70

O: 53.3 / 16 = 3.33

2) Divide all the numbers by the smallest one =>

C: 3.33 / 3.33 = 1

H: 6.70 / 3.33 = 2

O: 3.33 / 3.33 = 1

3) Write the empirial formula and calculate its mass:

C H2 O => 1 * 12.0 g/mol + 2 * 1.0 g/mol + 1 * 16.0 g/mol = 30 g/mol

4) Calculate how many times the empirical mass is contained in the molecular mass:

150 / 30 = 5

5) Conclusion:

The molecular formula is C5 H10 O5, i.e. the number of each atom in the molecular formula are:

C =5, H = 10, O = 5

Answer:

0.51

Explanation:

i got it wrong multiple times just for this to be the answer.

listening to mitski while crying over this science goodluck

Answer:

2 atoms

Explanation:

Answer:

Halogens are highly reactive

Answer:

20 g g/mL. 15.77

Explanation:

i think i answer it

Answer: Iron

Explanation: does not react with water, but hydrochloric acid will dissolve them, displacing the hydrogen from the HCl. Iron reacts with hydrogen chloride to produce iron chloride, FeCl2 — sometimes known as ferrous chloride.

To solve such this we must know the concept of chemical reaction. Iron is the metal, which dissolves in hydrochloric acid to produce hydrogen gas, but does not react with steam.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

When metals react with acid the liberation of hydrogen gas take place.  Metal which is at top of reactivity series react with both acid and steam or liquid water. Iron is the only metals which dissolves in hydrochloric acid to produce hydrogen gas, but does not react with steam or liquid water.

Therefore, iron is the metal, which dissolves in hydrochloric acid to produce hydrogen gas, but does not react with steam.

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Answer:

Determine the mass of substance and it's molar mass. Divide the given mass by it's molar mass to get moles and multiply time

6.002*1023 molecules 1mole

Answer:

law of independent assortment

Answer:

I believe that it is a

Explanation:

I can't comment on you the other question for some reason. Do you have any other means of communication??

Answer:

exposure to the sun (heat and light) for long period of time and air (oxygen reacts with particles)

Answer:

1

Explanation:

Any digit that is not 0 is always significant

Answer:

Hydrogen chloride - diluted solution. Sulfur dioxide ( SO 2) reacts with chlorine gas (Cl 2) in the presence of moisture to give HCl and H 2 SO 4. ... H 2 SO 4 and HCl are strong acids in aqueous solutions. If more HCl is added to the solution, then carbon dioxide gas, sodium chloride and water are produced.

Answer:

microbial growth

Explanation:

food that is not properly kept at a proper temperature bacteria will grow causing spoilage

Answer:

Elements of the periodic table are arranged in order of increasing atomic number. the periodic law states "when elements are arranged in increasing atomic number, there is a periodic repetition of their  chemical and physical properties."

Explanation:

Answer:

c. because all countries around the equator experiences heat

Elements in the same group have the same number of outermost electrons.

Electronic structure refers to the arrangement of electrons in the atom. We know that elements in the same group have the same number of outermost electrons.

However, as we come down the group, the inner shells of the elements in group 14 become bigger and the outermost shells are now found at higher energy levels such as n=4 or 5.

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Answer:

Chlorine (Cl)

Explanation:

The equation would be:

[tex]F+NaCl[/tex]  → [tex]NaF + Cl[/tex]

This is because no atom is lost in a reaction. Chlorine would be the missing chemical as it is on the other side of the equation and needs to be accounted for on the products side.

The missing chemical in the reaction of sodium chloride with fluorine forming sodium fluoride is chlorine.

The chemical equation is given as the representation of the reactants molecules and the product molecules in a chemical reaction.

The reaction follows the law of conservation and thereby no element will be lost in the reaction. Thus, the chemical reaction for the fluorine and sodium chloride is given as:

Fluorine + Sodium chloride → Sodium fluoride + Chlorine

Thus, the missing chemical in the reaction was chlorine.

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Answer: Gravity i think

We have that  the time that will have elapsed when 25.00 grams remains is

T=72hours

From the question we are told

100.0 grams of an isotope with a half-life of 36.0 hours is present at time zero. How much time will have elapsed when 25.00 grams remains?

Generally the equation for the Half life  is mathematically given as

Where

[tex]X=\frac{25}{100}\\\\X=0.25\\\\Therefore\\\\\frac{1}{2}^n=0.25\\\\n=2 half lives[/tex]

Therefore

T=2*36

T=72 hours

Hence

 the time that will have elapsed when 25.00 grams remains is

T=72hours

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