Sodium catches on fire when it reacts with water. Which electron

configuration represents an element that reacts in a similar way?

Answers

Answer 1

Answer:

1s2 2s2 2p6 3s2 3p6 4s1

Explanation:

The reaction of potassium and sodium metals with water is fast and highly exothermic. So much heat is released that the metals catch fire spontaneously when added to water.

Hence, it is common to see in textbooks that sodium and potassium reacts violently with water.

When added to water, potassium burns with a purple flame.


Related Questions

how many atoms of oxygen are in 3.45g of Na2SO4

Answers

Answer:

HERE

Explanation:Therefore, there will be

6.022

×

10

23

oxygen atoms in

1

mole, or

18 g

of water.

4 atoms are in 3.45g of Na2SO4

Which resource is renewable?
coal
oil
steel
wind

Answers

Answer: wind

Explanation:

wind is renewable it is able to renew itself coal, oil, and steal is not they are not renewable

If there is 3% freshwater available on earth, approximately what percentage of it is in ice?

Answers

i have no idea but if anyone is seeing this PLEASE ANSWER MY WUESTIONS ON MY PAGE i will give you the brainliest
1% cuz i thinkkk (I'm not sure)

ITEM BANK: Move to Bottom
Balance
Measured in Newtons
Measured in grams
Property of matter
Spring Scale
Weight
Both
Mass
Cugan 100
drag and drohte

Answers

Answer:

The scale reads the tension in the string. The tension in the string is 100 N. This is the force the string must exert up on either of the 100-N weights at either end of the string.

Nothing is moving, nothing is accelerating, so the net force on the spring is zero. Likewise, the net force on either of the 100-N weights is also zero. But that is another question. The spring scale does not measure the net force. The spring scale simply measures the tension, the magnitude of the force exerted by the string.

Explanation:

what is potential energy?

Answers

Answer:

energy held by by an object becuase of its position relative to other objects

Explanation:

Answer:

The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge , other factors.

Explanation:

I looked it up because i wanted to be sweet and help ((:

the empirical formula for a compound used as a green paint pigment is C2H3As3Cu2O8. The molar mass of its molecular formula was found to be 1013 grams. What is the molecular formula?

Answers

Answer:

Molecular formula = C₄H₆As₆Cu₄O₁₆

Explanation:

Given data:

Empirical formula = C₂H₃As₃Cu₂O₈

Molar mass of compound = 1013 g/mol

Molecular formula = ?

Solution:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass  of C₂H₃As₃Cu₂O₈ is 506.897 g/mol

by putting values.

n = 1013 / 506.897

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 (C₂H₃As₃Cu₂O₈)

Molecular formula = C₄H₆As₆Cu₄O₁₆

Which of the following could be the speed of an object at rest?

0 m/s


-4 m/s


20 m/s

1 m/s

Answers

Answer:

0 m/s

Explanation:

An object at rest stays at rest unless acted upon therefore it can only be 0.

Is it technically correct to call ionic compounds molecules?

Answers

Answer:

uh yeah I think so technically

Answer:

no

Explanation:

Please actually help me.
Thank you!

Answers

Answer:

I say 20 is ur best option

PLZZ HELPPP
According to the chart below, which planet has the smallest inner core?

Mars
Jupiter
Venus
Earth

Answers

Earth has the smallest inner core.

Answer:

The earth

Since it is shown in the chart that, Earth is inner corner is the smallest.

320 grams of brass released 5000 J of heat. If it has an initial temperature of 50°C, what is its temperature after releasing the heat? The specific heat capacity of brass is 376 J/kg. *

Answers

Answer:

ok:

Explanation:

We have:

[tex]q = mc\Delta T[/tex]

we know that q = -5000 J (it is negative since you release energy)

m = 320 g

and c = 376 J/kg.

We need to be careful before plugging them in. Since the units are J/kg for c, but we are talking about grams for m, we need to convert. I will just divide c by 1000  to get c = 0.376 J/g

We can now plug in:

(-5000 J) = (320 g) * (0.376 J/g) * [tex]\Delta T[/tex]

We can solve that [tex]\Delta T[/tex] = -41.5555

So the final temperature is [tex]T - \Delta T[/tex] which equals around 8.4°C.

What is this equation balanced?

Answers

the balanced chemical reaction would be :

CH4 + 2O2 =》CO2 + 2H2O

Answer:

the balanced chemical reaction is provided above .

Explanation:

the given reaction is reaction of methane with oxygen ( or burning of methane in presence of oxygen )

it is highly exothermic, because high amount of heat is evolved in this reaction

Q2. Here is the word equation for a chemical reaction.
magnesium
+
zinc oxide
magnesium oxide
+
zinc
Write down everything that the word equation tells you about the reaction
(Total 4 marks)

Answers

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.

To know more about word equation, here:

https://brainly.com/question/2602833

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2) A sample of argon has a volume of 5.0 Land the pressure is 650 mm Hg If the final temperature is
30. C, the final volume is 5.7 L, and the final pressure is 800. mm Hg, what was the initial temperature
of the argon?

Answers

Answer:

[tex]T_1 = -57.15^{\circ}C[/tex]

Explanation:

Given

[tex]P_1 = 650mmHg[/tex] --- Initial Pressure

[tex]V_1 = 5.0L[/tex] --- Initial Volume

[tex]V_2 = 5.7L[/tex] --- Final Volume

[tex]P_2 = 800mmHg[/tex] --- Final Pressure

[tex]T_2 = 30C[/tex] ---- Final Temperature

Required

Determine the initial temperature (T1)

This question will be solved using combined gas law which states:

[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]

However, the final temperature must be converted to degree kelvin

[tex]T_2 = 30C[/tex] --- Add 273.15

[tex]T_2 = 30k + 273.15 k[/tex]

[tex]T_2 = 303.15k[/tex]

Make T1 the subject in [tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]

[tex]T_1 = \frac{P_1V_1T_2}{P_2V_2}[/tex]

Substitute values for P1, V1, T2, P2 and V2

[tex]T_1 = \frac{650 * 5.0 * 303.15}{800 * 5.7}[/tex]

[tex]T_1 = \frac{985237.5}{4560}[/tex]

[tex]T_1 = 216.060855263[/tex]

Approximate

[tex]T_1 = 216k[/tex]

Convert to degree Celsius

[tex]T_1 = 216k[/tex] --- Subtract 273.15

[tex]T_1 = 216 - 273.15[/tex]

[tex]T_1 = -57.15^{\circ}C[/tex]

Hence, the initial temperature is -57.15C

These two finches share a common ancestor from South America. What is the most likely way that one ancestral finch species will develop into two distinct species?




A The ancestral species was genetically engineered to become two new species

B Groups of the ancestral species became isolated and adapted to different environments.

C. Two individual birds acquired many spontaneous mutations.
D. The ancestral species mated with other species and the offspring resulted in two new species.

Answers

Answer:

The correct answer is - B. Groups of the ancestral species became isolated and adapted to different environments.

Explanation:

Two finches Warbler Finch and Woodpecker Finch are two distinct finches are finches from the Galapagos Islands. Both of these finches have a common ancestor from South America.

The most likely explanation of developing two distinct species from an ancestral finch is by bein isolated and developed or adapted according to the challenges and environmental conditions and ultimately become different species after several generations.

How many oxygen atoms are contained in a sample of aluminum nitrate, Al(NO3)3, with a
mass of 4.285 x 10-21 g? (molar mass of Al(NO3)3 is 213 g mol-l)
a 109
b. 54
c. 9
d. 3

Answers

the answer is 9

Explanation:

Explanation: In 1 formula unit of Al(NO3)3 , there are (clearly!) 9 atoms of oxygen, 3 nitrogen atoms, and 1 aluminum atom.

Calculate the new pressure if a 2300 mL of a gas at a pressure of 1.88 atm is allowed to contract to a volume of 2.21 L.

Answers

Answer:

V₂ = 0.958 atm

Explanation:

Given data:

Initial volume = 2300 mL (2300/1000 = 2.3 L)

Initial pressure = 1.88 atm

Final volume = (2.21 L + 2.3L) = 4.51 L

Final pressure = ?

Solution;

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.88 atm × 2.3 L =  P₂ × 4.51 L

V₂ = 1.88 atm × 2.3 L / 4.51 L

V₂ = 4.32 atm.L /  4.51 L

V₂ = 0.958 atm

Consider the reaction below.
2NH318) N26 + 3H20)
What is the most likely effect to the forward reaction if there is an increase in pressure on this reaction?
O The reactant surface area increases.
O The reaction rate decreases.
O The reaction is not affected at all.
O The reaction stops completely.

Answers

Answer:

B. The reaction rate decreases

Explanation:

I just took the pre test and got a 100

Help with chemistry please

Which chemical reaction involves the most oxygen atoms?

Answers

H2O is A chemical reaction of the most oxygen atoms

Our Sun will eventually turn into a red giant and, finally, a white dwarf. Use the Hertzsprung-Russell
diagram to describe how the Sun's luminosity and temperature will change as it goes through these
stages.

Answers

Our Sun will eventually turn into a red giant in the cooler temperature and high luminosity and in the white dwarf phase has a hot temperature & dim luminosity.

What is Hertzsprung-Russell diagram?

In astronomy, the Hertzsprung-Russell diagram, often known as the H-R diagram, is a graph that plots the absolute magnitudes (intrinsic brightness) of stars against their spectral classifications (temperatures).

From the given diagram it is clear that when sun turns into a red giant then the temperature decreases and luminosity increases as it becomes large in size. And when it finally become a white dwarf then temperature comparatively increases and luminosity gets dim due to smaller size.

Hence in the red giant phase sun has a cooler temperature and high luminosity and in the white dwarf phase has a hot temperature & dim luminosity.

To know more about Hertzsprung-Russell diagram, visit the below link:

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Using the table for electrode potential differences (Figure 2) identify the possible composition of the screws responsible for the corrosion observed in the contact area with the copper wire.

Answers

Electricity you will get shocked

HELP!!! DUE TONIGHT!!
10 PTS!!
the answers are given already but my teacher wants me to show work...pls help!!!

Answers

Answer:

K I will attempt

Explanation:

a)

[tex]O_2_{(g)}+ 2H_2_{(g)} => 2H_2O_{(l)}\\[/tex]

b)

1 : 2 : 2 (I don't know if this is what the question wants but it is what I would answer)

c)

Hydrogen because it requires 2 moles of H2 to react with 1 mole of O2

d)

24 moles of water. Look at stoichiometric coefficient. 2:2 means 24 moles you get 24 moles

e)

Oxygen. 2 < 5/2. Remember, 1 mole of O2 requires 2 moles of H2. But 5/2 is still greater than 2

f)

First, let's find out how many moles of water we can get. Since O2 is the limiting reactant, and O2:H2O ratio is 1:2, we will get 4 moles of H2O. Then, we can multiply 4 by Avogadro's number which is [tex]6.022*10^{23}[/tex] to get the number of molecules. We get: 2.41 * 10^24 molecules of water.

Answer:

I'ma just take the point thank you very much

HELP I WILL GIVE BRAINLY FOR THE CORRECT ANSWER 1. Write the correct formula for the ionic compound formed between atoms of each of the following pairs of elements
.a. Sodium and sulfurb.
Aluminum and nitrogenc.
Barium and fluorined.
Sodium and phosphatee.
Calcium and hydroxidef.
Ammonium and carbonate

Answers

Nas2s
A1N
BaF2
Na3O4P
CaHPO4
(NH4)2CO3

3. __CH4 + __O2-> __CO2 + __H2O
4. __K + __H2O-> __KOH + __H2

Answers

Answer:

3: 1 CH4+ 2 O2-> 1 CO2 + 2 H2O

4: 2 K+ 2 H2O -> 2 KOH+ 1 H2

Explanation:

Explain how the magnetic field line data supports or refutes the claim that the launcher and spacecraft magnets were misaligned in the Tuesday launch.

Answers

Answer:

The magnetic field line data refutes the claim that the magnets were misaligned in the Tuesday launch.

Explanation: The data shows that there was no difference in the pattern of the field lines for all three launches. If the magnets in Tuesday's test had been misaligned, the force between the magnets in that test would be different than in the other test, showing both attraction and repulsion. During a misalignment at least one field line would connect opposite poles of the other magnets, but the magnetic field lines data we received did not show proof of misalignment.  Therefore the magnets were correctly aligned on Tuesday.

HELPPP ASAP PLEASE .

Answers

Answer:

ok       .

Explanation:

    .


Anna was looking at a map that showed where hurricanes had formed. She noticed that more hurricanes formed over tropical oceans than over colder ocean areas. Which of these best explains
why more hurricanes form over tropical oceans?

Water has fewer currents in tropical oceans than in colder oceans.

Air has less moisture over tropical oceans than over cold oceans.

Water has more waves in tropical oceans than in colder oceans.

Air has more moisture over tropical oceans than over

Answers

Air has more moisture over tropical oceans than over colder ocean areas.

Answer: D

Explanation:

which are exmaples of chemical change?

•baking cookies

• The statue of liberty's metal tarnishes from copper to green

• cold butter melts into liquid when heated

•salt is dissolved into freshwater

•Food scraps decompose into fertilizer in a compost pile

• frying changes the color and texture of an egg

•ocean water evaporates to water vapor on a hot day

•lighting a match

Answers

Answer:

cold butter melted when heated, lighting a match, baking cookies,

Explanation:

Calculate the density of a sample with a mass of 31.6g and a volume of 9.5mL include units in your final answer

Answers

Answer:

3.33 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question we have

[tex]density = \frac{31.6}{9.5} \\ = 3.326315...[/tex]

We have the final answer as

3.33 g/mL

Hope this helps you

Use the equation weight=mg to find the weight of a 45 kg child

Answers

Answer:

well the answer is 99.2lbs I know that

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