Please help ASAP! Which expression is equal to the number of kilograms (kg) in 3700 milligrams
(mg)?

Answer:

12.3

Explanation:

Trust

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, 12.3L is the volume of a balloon that contains a 1.00 mol sample of oxygen with a pressure of 2.00 atm at 300.0 K.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of oxygen gas= 2.00 atm

V= volume of oxygen gas =?

n =number of moles of oxygen gas=1.00 mol

T =temperature of oxygen gas =300.0 K

R = Gas constant = 0.0821 L.atm/K.mol

Substituting all the given values, we get

2.00×V=1× 0.0821×300.0

On calculation we get

Volume=12.3L

Therefore, the volume of oxygen is 12.3L.

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Answer:

116 years

Explanation:

To solve this, we will use the half life equation;

A(t) = A_o(½)^(t/t_½)

Where;

A(t) is the amount of strontium left after t years;

A_o is the initial quantity of strontium that will undergo decay;

t_½ is the half-life of strontium

t is the time it will take to decay

We are given;

A(t) = 7.5 g

A_o = 120 g

From online values, half life of strontium-90 is 29 years. Thus, t_½ = 29

Thus;

7.5 = 120 × ½^(t/29)

Divide both sides by 120 to get;

7.5/120 = ½^(t/29)

0.0625 = ½^(t/29)

In 0.0625 = (t/29) In ½

-2.772589 = (t/29) × (-0.693147)

(t/29) = -2.772589/(-0.693147)

t/29 = 4

t = 29 × 4

t = 116 years

Explanation:

H−S has least polarity in the bond because the electronegativity difference between H and S is the least.

Answer:

Summary. To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

Answer:

2.67M

Explanation:

Given: volume of solution = 750.0 mL = 0.750 L Find: molarity

mass of solute = 117 g NaCl

= 58.4428 g/mol (Periodic Table)

Plan: Find the number of moles of solute from the molar mass, then calculate molarity.

Step 1: Find moles of NaCl.

Step 2: Calculate molarity.

Answer: 2.67 M

Answer:

10

Explanation:

Answer: skeleton equation

Explanation:

Answer:

the answer should be A

Answer:

45 meters

Explanation:

Did the math

Answer:

Explanation:

21:B 22:B

Answer:

After the water has evaporated, the white crystals in the beaker have a mass of 20.0g.

The pieces of experimental evidence would best help the student to confirm that a new compound had not been made and that only a physical change occurred is of 20.0 g of white KCl crystals.

Physical changes are defined as a modification to a sample of material when some of the substance's attributes change but the composition of the sample remains the same. The digestion of food, combustion, osmosis, and phase transitions are just a few examples of how these changes play a crucial role in our daily lives.

Crystals are defined as a solid substance whose elements such as atoms, molecules, or ions are grouped in a highly organized microscopic structure to create an all-pervasive crystal lattice. Crystals are formed when molecules in a liquid group together to stabilize when it starts to cool and solidify.

Thus, the pieces of experimental evidence would best help the student to confirm that a new compound had not been made and that only a physical change occurred is of 20.0 g of white KCl crystals.

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Explanation:

[tex] \frac{6.900 \times {10}^{10} }{4.000 \times {10}^{8} } \\ 1.725 \times {10}^{10 - 8} \\ 1.725 \times {10}^{2} [/tex]

Hope it will help you :)

Answer:

C!!!!!!!!!!!!!!!!!!!!

Explanation:

Hope this helps!!!!!!!!!

I'm pretty sure it's a series circuit because all components are connected end-to-end, forming a single path for current flow.

Answer: 448 g of [tex]O_2[/tex] will be required to completely react with 784g moles of CO(g) during this reaction.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} CO=\frac{784g}{28g/mol}=28moles[/tex]

The balanced chemical equation is:

[tex]2CO(g)+O_2(g)\rightarrow 2CO_2(g)[/tex]  

According to stoichiometry :

2 moles of [tex]CO[/tex] require  = 1 mole of [tex]O_2[/tex]

Thus 28 moles of [tex]CO[/tex] will require=[tex]\frac{1}{2}\times 28=14moles[/tex]  of [tex]O_2[/tex]

Mass of [tex]O_2=moles\times {\text {Molar mass}}=14moles\times 32g/mol=448g[/tex]

Thus 448g of [tex]O_2[/tex] will be required to completely react with 784g moles of CO(g) during this reaction.

Answer:

Boy I'm really boutta get to yo pickle chin ahh boy, egg head like collard greens head a//ss boy, oh hell nah boy yo dirt ahh boy stank ahh boy afro head ahh, lip gloss chin ahh boy ugly ahh boi

Explanation:

Answer:

metamorphic

Explanation:

when one rock changes another rock the rock that got changed is now metamorphic

Answer:

Yes

Explanation:

Answer:

THATS WHAT SHE SAID

Explanation:

Answer:

Accuracy

Explanation:

It is important for scientists to review the work of other scientists, so they can be sure there are no mistakes or lack of judgement. They repeat to compare results to make hypotheses.

Answer:

Elements and compounds are two types of pure substances.

Explanation:

Answer:

Im not 100% sure but i think its option two or 1

Explanation:

Explanation:

magnesium  +  zinc oxide  --> magnesium oxide  +  zinc

Mg + ZnO --> MgO + Zn

Reactants:

- Magnesium

- Zinc Oxide

Products:

- Magnesium oxide

- Zinc

Type of reaction: Displacement Reaction

The provided word equation depicts a chemical reaction between magnesium and zinc oxide that results in the creation of magnesium oxide and zinc.

Magnesium and zinc oxide are the reactants in the process. These are the substances that alter chemically. The process produces magnesium oxide and zinc. These are the new chemicals produced by the chemical process. This reaction undergoes a chemical transformation, as indicated by the term equation. Magnesium oxide and zinc are formed when magnesium interacts with zinc oxide.

The reaction's stoichiometry is not explicitly stated in the word equation. We cannot establish the exact quantities of the reactants and products involved without further information or factors. The term equation denotes that the reaction obeys the rule of mass conservation. The total mass of reactants must equal the total mass of products.

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Explanation:

When Henri Becquerel investigated the newly discovered X-rays in 1896, it led to studies of how uranium salts are affected by light. By accident, he discovered that uranium salts spontaneously emit a penetrating radiation that can be registered on a photographic plate.

Answer:

Aluminiun

Explanation:

Answer:

b

Explanation:

i think it is b

Answer:

when you burn wood in a campfire, chemical energy is converted to heat and light energy.

Explanation :

When wood is burned stored potential energy ( in the form of chemical energy ) in the log is released due to heating by other excited atoms . This process is called combustion and requires presence of oxygen. So,  combustion can be defined as a process which changes chemical energy into kinetic energy in the form of heat.  In case of combustion  an organic say wood in this case combines with oxygen present in the atmosphere to give off carbon dioxide, water and energy in the form of heat and light .