What I need help fast!

Answer:

The initial temperature of the metal is 84.149 °C.

Explanation:

The heat lost by the metal will be equivalent to the heat gain by the water.  

- (msΔT)metal = (msΔT)water

-32.5 grams × 0.365 J/g°C × ΔT = 105.3 grams × 4.18 J/g °C × (17.3 -15.4)°C

-ΔT = 836.29/12.51 °C

-ΔT = 66.89 °C

-(T final - T initial) = 66.89 °C

T initial = 66.89 °C + T final

T initial = 66.89 °C + 17.3 °C

T initial = 84.149 °C.

Answer:

6.8 mole of O₂

Explanation:

Given expression:

       2H₂   +   O₂   →   2H₂O

Number of moles of H₂ = 13.6moles

Unknown:

Number of moles of O₂  = ?

Solution:

In the given problem, we are to find the number of moles of oxygen gas that will use up 13.6mole of hydrogen gas;

 From the reaction equation;

             2 mole of H₂ will completely react with 1 mole of O₂

         13.6 moles of H₂ will completely be used up by [tex]\frac{13.6}{2}[/tex] mole of  O₂

                                                                                        = 6.8 mole of O₂

Answer:

An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle.

Explanation:

Mark me brainliest.

Answer:

Lithium will lose about 2 electrons

Making it a cation

Answer:

about three

Explanation:

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Answer:

Concentration is a measure of how much solute (or dissolved "stuff") is present per amount of solvent (or dissolving liquid) in a solution. The most common measurement of concentration is molarity, abbreviated M. Molarity is expressed in amount per volume, or moles/liter.

Explanation:

Answer:

Neodymium

Explanation:

Answer:

Did you just let your cat walk on your keyboard? XD

Could you explain this a bit better please?

I'll answer the question in the replies of this comment if you can give me a bit more information.

Explanation:

May I have brainliest please? :)

Answer:

For example, friction between our shoes and the floor stop us from slipping and friction between tyres and the road stop cars from skidding. Friction is sometimes unhelpful. For example, if you don't lubricate your bike regularly with oil, the friction in the chain and axles increases.

Explanation:

Answer:

An ionic bond

Explanation:

They are most likely going to form an ionic bond.

An ionic bond is where atoms lose/gain electrons.

It is easier for elements in the first group to lose the one electron on their valence shell and for elements in the second group to take that.

Some examples are Sodium Chloride (NaCl) and Potassium Chloride (KCl)

Explanation:

An acid is a substance that ionizes to produce excess hydrogen ion in solutions.

Hello. You did not say what is the experiment to which this question refers, which makes it impossible for it to be answered accurately.

However, advice that should be given to anyone who should start an experiment is: establish a control treatment, provide all treatments with the same variables and the same resources, write down everything that happened in the experiment from implementation to data collection and results, make measurements and analyzes on the same date in all treatments and keep the steaks in the same environment.

Answer:

Which Lab are you doing?

Antimony

Hope it helps

Answer:

[tex]\boxed {\boxed {\sf 1. \ Antimony}}[/tex]

Explanation:

A metalloid is an element that is "in between" a metal and non-metal. They display some properties of both.

On the Periodic Table, the metalloids are found in a zig-zag step pattern to the right of the metals and the left of the non-metals.

There are 7 metalloids: boron, silicon, germanium, arsenic, antimony, tellurium, and polonium.

So, the correct answer is 1. Antimony

Answer:

Sort of answer, but it'll lead you in the right direction I hope.

Explanation:

I mean, ofc, the molecules or atoms or whatever the circles are can't be put together that way bc matter says so. It looks like the other diagram is showing water or gas, and if it were turning into the one on the right, then it would usually either settle into water if it was gas or become a single solid object like water. If this is gas, then it doesn't make sense, because gas particles are always separate from each other.

The corresponding mRNA to 5'AAAACTGTGCAT3' is

3'UUUUGACACGUA5'.

Nucleotides are the bases that are arranged in a specific way, and it joins the two strands of DNA and RNA.

In DNA, four nucleotide bases are present AT and GC. They are attached to each other.

In RNA, the same bases are present but instead of T, U uracil is present.

When reading the DNA, the RNA bases complimentary join with the bases of DNA.

Thus, the corresponding mRNA sequence is 3'UUUUGACACGUA5.

Learn more about base sequence

https://brainly.com/question/17997743

Answer:

B

Explanation:

Answer:

D. 3 mol/0.5 L

Explanation:

Just took the quiz

Answer:

rank from lower to higher electronegativity

16)Li

   C

   N

17)Ne

  C

   O

18)Si

   P

   O

19)K

   Mg

   P

20)He

    S

    F

Answer:

82

Explanation:

i took the assingment

Answer:

a. The density of the aluminum will change if the sample gets too big.

Explanation:

Since increasing its size increases its volume hence it affects the value of its density by decreasing.

note: Density = mass/volume.

Answer:

the zinc strip begins to darken. If left in the solution for a longer period of time, the zinc will gradually decay due to oxidation to zinc ions.

Explanation:

Answer:

3.011×1023 individual carbon dioxide molecules

Answer:

It would be about 1 g/mL.

Explanation:

With the information provided the volume of the chalk can be said to be about 5mL.

Hence;

Its density = 5g/5mL = 1g/mL.

Answer:

Butane and benzene are both compounds. They contain multiple elements bonded together in a specific ratio. Kerosene and gasoline are mixtures because they are combinations of several compounds. Oxygen is an element because it is made up of only one type of atom.

Explanation:

2. 2Al(s) + 6HCl(aq) + 2AlCl3(aq) + 3H2(g) represents a single replacement reaction

A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds

Not all of these reactions can occur. We can use the activity series(voltaic series), which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.

1. 2Al(s) + 3Cl2(g) → 2AlCl3(s)

Syntesis/combination reaction

2. 2Al(s) + 6HCl(aq) ⇒2AlCl3(aq) + 3H2(g)

Single replacement reaction

3. 2AlCl3(s) → 2Al(s) + Cl2(g)

Decomposition reaction

4. AlCl3(aq) + 3KOH(aq) + Al(OH)3(s) + 3KCl(aq)

Double  replacement reaction

In a single replacement reaction, one element replaces another one. The reaction that shows the single replacement reaction is:

[tex]\bold { 2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)}[/tex]

[tex]\bold { 2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)}[/tex]

In the given reaction, aluminum replaces the hydrogen from hydrochloric acid to form Aluminum chloride.

Therefore, the reaction that shows the single replacement reaction is:

[tex]\bold { 2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)}[/tex]

Learn more about Single replacement reaction:

https://brainly.com/question/8625202

Explanation:

 We are to write the orbital notation and electronic configuration of sulfur and iron.

The orbital notation shows the filling of electrons into orbitals or sublevels.

Electron configuration  shows the distribution of electrons into shells;

        Number of electrons     Electron configuration     Orbital notation

S                  16                                   2 8 6                      1s² 2s² 2p⁶ 3s² 3p⁴

Fe                26                                2, 8, 14 2           1s² 2s² 2p⁶ 3s² 3p⁶3d⁶4s²        

Answer:

Uhm if you're failing the class why are you still using brainly to get answers... Where's your momma boy?

Explanation:

It izzz what it izzz

Answer:

La configuración electrónica del aluminio es: 1s² 2s² 2p⁶ 3s² 3p¹

Explanation:

El aluminio es un elemento semimetálico de número atómico Z= 13. Con el número atómico y el diagrama de Moeller se puede hallar su configuración electrónica:

1s² 2s² 2p⁶ 3s² 3p¹

Answer:

The answer is B

Explanation:

Inertia: a tendency to do nothing or to remain unchanged.

Answer:

d

Explanation:

check if one element replaces another element in a compound

The single replacement reaction can be identified when there has been the replacement of one element with another element in the compound. Thus, option C is correct.

The replacement reaction can be defined as the reaction in which the highly reactive element replaced the low reactive element in the reaction and forms a compound.

The reaction has been given as:

X + AY [tex]\rightarrow[/tex] AX + Y

The X has been highly reactive than Y replaces Y in the compound and forms the compound AX.

The single replacement reaction can be identified when there has been the replacement of one element with another element in the compound. Thus, option C is correct.

For more information about a single replacement reaction, refer to the link:

https://brainly.com/question/8625202

Answer:

Put sand in one cup and water in the other. Put two heat lamps at equal height and under each one put the water and sand, this must be done at the same exact time. Set a timer for 5, then 10, then 15, and so forth minutes. Each time measure the temperature of each with the thermometers and write the down. Have a certain temperature you want them to get to and see which gets to it quicker. Then set a new temp 3 times to see if the answer is consistent.

Explanation:

Doing this would test whether land or water heats quicker.

Answer:

heat lamps

Explanation: