I need help with these questions fast plz no links!!!!

Answer:

i believe it is titanium.

Explanation:

Answer:

2. Chromium

Explanation:

Answer:

26.98°C

Explanation:

Applying,

Q = cm(t₂-t₁)................ Equation 1

Where Q = Heat transferred to the soil, c = specific heat capacity of dry soil, m = mass of the soil, t₂ = final temperature, t₁ = initial temperature.

From the question,

Given: Q = 11 kJ = 11000 J, m = 2300 g = 2.3 kg, t₁ = 21°C

Constant: c = 800 J/kg.°C

Substitute these values into equation 1

11000 = 800×2.3(t₂-21)

Solving for t₂

t₂-21 = 11000/(800×2.3)

t₂-21 = 11000/1840

t₂-21 = 5.98

t₂ = 5.98+21

t₂ = 26.98°C

Answer:

let me know if it is right:)

and I hope it make sense

Answer: Oxygen is a gas at room temperature.

Answer:

Mass of copper in 200 g bronze is 120 g.

Explanation:

If it is known that bronze is formed with 60% copper and 40% tin, what will be the mass of copper contained in 200 grams of bronze?

Percentage of copper in bronze = 60 %

Percentage of tin in bronze = 40 %

Mass of bronze  = 200 grams

Mass of copper in bronze = 60 % of 200 g

= 0.6 x 200 = 120 grams

Mass of copper in 200 g bronze is 120 g.  

Answer: A & D

Explanation:

The two main forces are temperature and salinity.

ANSWER 10 MOLES OF CARBON DIOXIDE

2C0 + O2 → 2CO2

2 moles of carbon monoxide forming 2 moles of carbon dioxide

10 moles of carbon monoxide will form 10 moles of carbon dioxide

Answer: Percent yield represents the ratio between what is experimentally obtained and what is theoretically calculated, multiplied by 100%.

% yield

=

actual yield

theoretical yield

⋅

100

%

So, let's say you want to do an experiment in the lab. You want to measure how much water is produced when 12.0 g of glucose (

C

6

H

12

O

6

) is burned with enough oxygen.

C

6

H

12

O

6

+

6

O

2

→

6

C

O

2

+

6

H

2

O

Since you have a

1

:

6

mole ratio between glucose and water, you can determine how much water you would get by

12.0

g glucose

⋅

1 mole glucose

180.0 g

⋅

6 moles of water

1 mole glucose

⋅

18.0 g

1 mole water

=

7.20

g

This represents your theoretical yield. If the percent yield is 100%, the actual yield will be equal to the theoretical yield. However, after you do the experiment you discover that only 6.50 g of water were produced.

Since less than what was calculated was actually produced, it means that the reaction's percent yield must be smaller than 100%. This is confirmed by

% yield

=

6.50 g

7.20 g

⋅

100

%

=

90.3

%

You can backtrack from here and find out how much glucose reacted

65.0 g of water

⋅

1 mole

18.0 g

⋅

1 mole glucose

6 moles water

⋅

180.0 g

1 mole glucose

=

10.8

g

So not all the glucose reacted, which means that oxygen was not sufficient for the reaction - it acted as a limiting reagent.

Explanation:

Answer

35 torr

Explanation:

The mixture contains 320 torr of hydrogen, 485 torr of oxygen, a total pressure of 840 torr, so you need to find the leftover

320(hydrogen) + 485(oxygen) = 805 torr

840(total) - 805 = 35 torr

Its Iron and Potassium because if you look at the periodic table,and you go down the list of metals, you can see what metals are there.

Answer:

The name of the reaction was coined after Alexander William Williamson developed it in 1850.Williamson Ether Synthesis is a reaction that uses deprotonated alcohol and an organohalide to form an ether. 1. Williamson Ether Synthesis usually takes place as an SN2 reaction of a primary alkyl halide with an alkoxide ion.

Explanation:

yeah

Answer:

dragon fly larvae, beetles, fish, pelican

Explanation:

Answer:

Molarity can be used to calculate the volume of solvent or the amount of solute. The relationship between two solutions with the same amount of moles of solute can be represented by the formula c1V1 = c2V2, where c is concentration and V is volume.

The relationship between Molarity and volume of a solution is : ( B ) They are inversely related

Molarity is the number of moles of solute in unit of volume of the solution ( usually per liter ). Molarity is calculated by dividing the number of moles of a solute ( n ) by the volume of the solution.

Molarity = n / v .

Therefore we can conclude that the relationship between Molarity and volume is that they are inversely related.

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Answer:

So They want you to tick the Correct Option corresponding to each Reaction.

The answers are below. So Tick correctly!

The first is a SINGLE REPLACEMENT REACTION.

The second is a COMBUSTION REACTION.

The third is a DOUBLE REPLACEMENT REACTION.

The fourth is a SYNTHESIS REACTION. Examples are C + O2 = CO2, CaO + H2O = Ca(OH)2.

The fifth is a DECOMPOSITION REACTION. Another example is CaCO3 === CaO + CO2

The sixth is also a DOUBLE REPLACEMENT REACTION.

Answer:

Yes it is reduced because ocl is the reducing agent

Answer:

A

Explanation:

because number of particle = moles × 6.02 × 10^23

which gives the answer as an A

2.41x10²⁴ molecules are in 4 moles of carbon monoxide (CO). Therefore, the correct option is option A.

The smallest recognizable unit into that a pure substance may be divided while retaining its composition as well as chemical properties is a molecule, which is a collection of atoms that are at least two in number. Until parts made up of a single molecule are reached, the division of an example of a substance smaller progressively smaller parts does not result in a change with regard to its composition nor its chemical properties.

Still smaller sections of the substance are produced by further subdivision, and these components are always different chemically and typically have different compositions from the initial substance. The chemical links that link the atoms in the molecule together are severed during this final step of fragmentation.

molecules =  moles × 6.022×10²³

                  = 2.41x10²⁴  

Therefore, the correct option is option A.

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Answer:

N2 +3 H2 → 2 NH3

so we have 2180 g of N2

or 2.80 g ÷ 28.02 g/mol = 0.100 mol

1 mol of N2 react with 3 moles of H2

Therefore 0.100 mol of N2 react with 0.3 moles of H2

0.300 mol X Molar mass (2.00 g/mol) = 0.600 g

0.600 g of H[tex]_2[/tex] are needed to react with 2.80 g of  N[tex]_2[/tex].  Mole is one of the International System for Units' seven foundation units (SI).

A mole is just a measuring scale. In reality, it is one of the International System for Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. Using absolute amounts of atoms, molecules, or ions would be problematic as well since chemical reactions frequently occur at levels that use grams would be inappropriate.

A mole consists of precisely 6.022140761023 particles. The "particles" might be anything, from tiny things like electrons and atoms to enormous things like stars or elephants.

N[tex]_2[/tex] +3 H[tex]_2[/tex] → 2 NH[tex]_3[/tex]

2.80 g ÷ 28.02 g/mol = 0.100 mol of N[tex]_2[/tex]

1 mol of N[tex]_2[/tex] react with 3 moles of  H[tex]_2[/tex]

0.100 mol of  N[tex]_2[/tex] react with 0.3 moles of H[tex]_2[/tex]

0.300 mol X Molar mass (2.00 g/mol) = 0.600 g of H[tex]_2[/tex]

Therefore, 0.600 g of H[tex]_2[/tex] are needed to react with 2.80 g of  N[tex]_2[/tex].

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Answer:

Hydrogen Bonding (H-Bonding)

Answer:

C₂H₆

Explanation:

The formula for ethane is C₂H₆

<FIRST ANSWER>  

The answer is A; tundra is at a higher latitude than a desert

Explanation:

Both a tundra and a desert are very dry, so that eliminates B and C.

And as for D, Tundra receives more rain than a desert does, so that eliminates D.

Answer:

Surface tension causes water to form spherical droplets and allows it to support small objects, like a scrap of paper or a needle, if they are placed carefully on its surface.

>3

High surface tension is the characteristic of water which helps it form droplets.

It is the attractive force between the water molecules. Cohesion is the property of water that explains that how water molecules interact with each other that means water likes to stick to itself.        

Now lets check all options one by one:

Option (A): Low specific heat

Water has high specific heat due to the hydrogen bonding.

So, it is incorrect option.

Option (B): Non polar structure

Water molecule is polar covalent molecule because of its shape. The shape of the water molecule is bent.

So, it is incorrect option.

Option (C): High surface tension

Stronger the cohesion force then stronger the surface tension. It is responsible for the shape of the liquid droplets.

So, it is correct option.

Option (D): Ability to dissolve  substance

It has ability to form hydrogen bond which makes an water a good solvent. Water is universal solvent.

So, it is incorrect option.    

Thus, from above conclusion we can say that High surface tension is the characteristic of water which helps it form droplets.

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Answer:

"Francium"

Explanation:

"Francium" is a chemical element with the symbol "Fr" and the atomic number "87". Classified as an "alkali metal", Francium is a solid at room temperature.

Atomic Mass: "223.01973u"

Year Discovered: "1939"

Answer: exothermic

Explanation: chemical reactions that release energy is called exothermic, and in this case, more energy is being released. (I THINK)

The reaction shown in the picture is exothermic reaction.

The exothermic reaction leads to the release of energy. This energy is often higher than the combined energy of the reactants.

It can be understood that the net amount of energy required to initiate an exothermic reaction is less than the net amount of energy released by the reaction. When a calorimeter, a device used to measure the heat released by a chemical reaction, the net amount of heat energy that flows through the device is equal to the negative of the total energy change of the system.

In the picture, first reactants had high energy and after the formation of the product the energy decreases.

The nuclear fission of one atom of uranium-235 releases more than 2.5 million times the energy that is produced from the combustion of coal.

The fission of one atom can cause a chain reaction in which the neutron from the fission of one uranium-235 atom can strike another atom, leading to its nuclear fission.

Therefore, The reaction shown in the picture is exothermic reaction.

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Answer:

0.025 liters

Explanation:

divide 25 into 1000

Answer:

25 mL = 0.025 L

Explanation:

edge 2023

Answer:

You right!

Explanation:

Answer: Yes your right

Answer:

Given solutions are:

a) 0.1 M of H2S

b) 0.1 M of HNO2

c) 0.1 M of H2SO3

d) 0.1 M of NH4Cl

Explanation:

The electrical conductivity of a solution is directly proportional to the number of ions present in it.

All the given solutions have the same concentration.

But on dissociation, each solution produces a different number of ions as shown below:

[tex]H{2} S ->HS^{-}+H^{+}[/tex]

2 ions per molecule.

[tex]HNO{2} -> H^{+} + NO{2}^{-}[/tex]

2 ions per molecule.

[tex]H2SO3 -> 2H^{+} +SO{3} ^{2-}[/tex]

3 ions per molecule.

[tex]NH{4}Cl -> NH{4}^{+} + Cl^{-}[/tex]

2 ions per molecule.

Answer:

0.1M H2SO3 has high electrical conductivity.