Answer:
Magnesium and barium
Explanation:
They are both Alkaline earth metals. All the alkaline earth metals react with water to produce hydrogen gas and the metal hydroxide, although somewhat less vigorously than the alkali metals.
The organization and colors in the periodic table magnesium and barium are the two element with most of the similar properties because they both belongs to alkaline earth metals.
What are periodic table?
Periodic table are defined as an arrangement of all the elements known to man in accordance with their increasing atomic properties and recurring chemical properties. 118 elements are arranged in periodic table.
Alkaline earth metals are defined as any of the divalent strongly basic metal of group 2 of a periodic table comprising beryllium, magnesium, calcium, barium and radium.
Thus, the organization and colors in the periodic table magnesium and barium are the two element with most of the similar properties because they both belongs to alkaline earth metals.
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2. A gas that has a volume of 28 liters, a ternperature of 45 °C, and an unknown
pressure has its volume increased to 34 iters and its temperature decreased to
35 °C. If I measure the pressure after the change to be 2.0 atm, what was the
original pressure of the gas?
The original pressure of the gas : 2.507 atm
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = final gas pressure
V2 = final gas volume
T1 = initial gas temperature (K)
T2 = final gas temperature
V₁=28 L
T₁=45+273=318 K
P₂=2 atm
V₂=34 L
T₂=35+273=308 K
then initial pressure :
[tex]\tt P_1=\dfrac{P_2.V_2.T_1}{V_1.T_2}\\\\P_1=\dfrac{2\times 34\times 318}{28\times 308}\\\\P_1=2.507~atm[/tex]
thw table below provides data the length of day for different planets in the solar system
The day length of each planet corresponds to the amount of time it takes to complete which type of motion?
a one rotation of the planet on its as
b one reversal of magnetic poles of the planet
c one revolution of the planet around the Sun
d one orbit of the largest moon of the planet
Answer:
a one rotation of the planet on its axis
Explanation:
The two types of motion that planets undergo are;
1) rotation of the planet about its axis
2) revolution of the planet around the sun.
In every planet there are days as shown in the image attached to the question. However, the length of day in each planet is determined by the time required for the planet to complete one rotation on its axis.
It takes the earth 1 earth day (24 hours) to complete rotation on its axis.
A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is
this?
Answer:
1.91×1021/6.023×10^23
Explanation:
need thanks and make me brainiest if it helps you
Write equilibrium constant (KC) for the following reactions
1. N2(g) + O2(g) ⇌ 2NO(g)
2. N2(g) + 3H2(g) ⇌ 2NH3(g)
3. 2SO2(s) + O2(g) ⇌ 3SO3(g)
4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)
The equilibrium constant(Kc) is equal to the concentration of the products over the concentration of the reactants, and each coefficient of the compound in an equilibrium state
Further explanationThe equilibrium constant or Kc is the value of the concentration product in the equilibrium state of the substance in the right segment divided by the product of the substance in the left section, each of which has a reaction coefficient raised
solid (s) and liquid (l) have no concentration, so these two phases are not involved in the equilibrium constant KC (given the value = 1).
The equilibrium constant based on concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\tt Kc=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]
1. N2(g) + O2(g) ⇌ 2NO(g)
[tex]\tt Kc=\dfrac{[NO]^2}{[N_2][O_2]}[/tex]
2. N2(g) + 3H2(g) ⇌ 2NH3(g)
[tex]\tt Kc=\dfrac{[NH_3]^2}{[N_2][H_2]^3}[/tex]
3. 2SO2(g) + O2(g) ⇌ 3SO3(g)
[tex]\tt Kc=\dfrac{[SO_3]^3}{[SO_2]^2[O_2]}[/tex]
4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)
[tex]\tt Kc=\dfrac{[H_2]^4}{[H_2O]^4}[/tex]
Which change of state is shown in the model?
condensation
deposition
boiling
freezing
Answer:
Deposition
Explanation:
The process of deposition is when an object goes from a gas to a solid. In the picture, the first container had a gas (molecules were far apart). In the second, the molecules were tightly packed (a solid).
Hope this helps!
How does the activity series of metals reflect the stability of metals?
A. The metals lowest on the list are the least stable.
B. The metals highest on the list are the most stable.
C. The metals lowest on the list are the most reactive.
D. The metals highest on the list are the least stable.
The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."
What is activity series?The organization of metals in a declining sequence of respective reactivities is referred to as the "activity series," also described as the "reactivity series" of metals.
What is metals?Materials having the qualities of being bright, hard, fusible, malleable, ductile, etc. were known as metals.
The activity series of metals reflect the stability of metals are "the metals highest on the list are the least stable."
To know more about activity series and metals
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Cl2 +
NaBr
what’s this answer?!
Light radiation travels as a wave and does ________ require a _____________ for travel
Answer:
not
medium
Explanation:
Light radiation travels as a wave and does not require a medium for travel. Like all electromagnetic radiations, light does not need medium particles for its propagation.
Light radiation can pass through a vacuum of space without particles. This carries energy from one point to another in this region of space. Such form of waves are electromagnetic waves. Electromagnetic waves can be propagated through vacuums.can someone answer pls
How many molecules are in 100 g of C6H120,?*
Answer:
3.37 × 10²³ molecules
Explanation:
Given data:
Mass of C₆H₁₂O₆ = 100 g
Number of molecules = ?
Solution:
Number of moles of C₆H₁₂O₆:
Number of moles = mass/molar mass
Number of moles = 100 g/ 180.16 g/mol
Number of moles = 0.56 mol
Number of molecules:
1 mole contain 6.022 × 10²³ molecules
0.56 mol × 6.022 × 10²³ molecules /1 mol
3.37 × 10²³ molecules
If u like someone
how do u know if they like u back.
Answer:
The chemistry between you will be instant. Sometimes it may be hard to know if they like you back. Knowing that you can not live without them and that you bump in to each other everywhere you go, is fate at work. You might also just need the courage to ask them out. You never know what will happen if you try. :)
Answer:
You will feel it
Explanation:
when liquid water changes into solid ice, it increases in ?
when liquid water changes into solid ice, it increases in mass
What is the main product of cellular
respiration?
Answer:
The main products are ATP, carbon dioxide, and water.
Label each of the following properties of sulfur as either á physical or chemical property.
Use the definition of a physical property and chemical property to back up your answer.
1. It reacts with hydrogen when heated
2. It is a yellow solid at room temperature
3. It is soluble in carbon disulfide
4. Its density is 2.97 g/cm3
5. It melts at 113°C
Answer:
Explanation:
1. It reacts with hydrogen when heated
Chemical property
2. It is a yellow solid at room temperature
Physical property
3. It is soluble in carbon disulfide
Chemical property
4. Its density is 2.97 g/cm3
Physical property
5. It melts at 113°C
Physical property
Physical properties tells us everything about what substance is when no change is occurring to its constituents.
It can be observed using apparatus and instruments. Examples are state of matter, color, odor, taste, texture, hardness, solubility in water, density, melting point and boiling point
Chemical properties are those properties that tell us about what a substance can do as regards to whether or not the substance reacts with other substances. Examples are flammability, rusting of irons, precipitation, decomposition of water by an electric current.
PLEASE I NEED HELP!!
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of?
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
2.64
Gold
3.52
Platinum
Density g/cm
8.92
Marble
Quartz
19 32
Diamond
214
O Marble
Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
When ionic compounds are added to water, they dissociate or break apart into ions. In the case of table salt, salt added to water dissociates into sodium ions and chloride ions. This would seem to be a chemical change. However, scientists do not consider this to be one, because the solid table salt remains after the water is evaporated. The atoms recombine into their original arrangement once the water is removed.
Which word from the selection helps you understand that physical changes can be undone?
a added
b dissociate
c recombine.
d removed
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
264
Gold
Density g/cm
8.92
Marble
19.32
Diamond
3.52
Platinum
21.4
O Marble
O Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
Which has a higher melting point KF or KI?
Answer:
kf
Explanation:
Fill in the blank with the correct vocabulary word: H20 (1) --> H2 (g) + O2 (g) Water is the and hydrogen gas is the
Answer:
Water is reactant and hydrogen gas is product
Explanation:
Calculate the molar mass of B(NO3)3 ?
The molar mass of B(NO₃)₃ - Boron nitrate : 196.822 g/mol
Further explanationIn stochiometry therein includes
Relative atomic mass (Ar) and relative molecular mass / molar mass (M)
So the molar mass of a compound is given by the sum of the relative atomic mass of Ar
M AxBy = (x.Ar A + y. Ar B)
The molar mass of B(NO₃)₃ - Boron nitrate :
M B(NO₃)₃ = Ar B + 3. Ar N + 9.Ar O
M B(NO₃)₃ = 10.811 + 3. 14,0067 + 9. 15,999
M B(NO₃)₃ = 196.822 g/mol
If 6 grams of a hydrocarbon gas have a volume of
4.8 cubic decimeter, what would be the
approximate molecular mass of this gas?
A 30 grams
B 40 grams
C 20 grams
D 48 grams
Answer:
30 grams
Explanation:
I got 40 wrong so I picked 30
Answer:
30 grams
Explanation:
I did the ck12
Select the correct answer.
What are the oxidizing agent and the reducing agent in this chemical equation?
3FeS + 8HNO3 → 3FeSO4 + 8NO + 4H2O
A.
FeS is the oxidizing agent, and HNO3 is the reducing agent.
B.
HNO3 is the oxidizing agent, and NO is the reducing agent.
C.
FeS is the reducing agent, and HNO3 is the oxidizing agent.
D.
HNO3 is the reducing agent, and NO is the oxidizing agent.
Answer:
Its answer choice C
What characteristic do atoms in the same group of elements share?
1 - they have the same number
2 - they have similar physical property
3 - they have the same atomic mass
4 - the same number of electrons orbitals
Answer:
2 option
Explanation:
please mark me brainliest and 5 star
Which subatomic particle gains energy from the flame and then loses it in the form of light?
Answer:fire?
Explanation: it gains heat from heat/friction, and losses it if its been lighted up for too long (it can be used as light)
Why do the electron clouds around a central atom stay as far apart as possible?
Electron pairs around a central atom arrange themselves so that they can be as far apart as possible from each other. The repulsion between negatively charged electrons pairs in bonds or as lone pairs causes them to spread apart as much as possible
Explanation:
For the reaction N2 + 3H2 - 2NH3, how many moles of nitrogen are required to produce 9.58 mol of ammonia?
Answer:
3.193 mol
Explanation:
The reaction is
[tex]N_2+3H_2\rightarrow 2NH_3[/tex]
We use the stoichiometry in order to find the moles of nitrogen required.
[tex]9.58\ \text{mol of }NH_3\times \dfrac{1\ \text{mol of }N_2}{2\ \text{mol of }NH_3}[/tex]
[tex]=3.193\ \text{mol of }N_1[/tex]
The amount of nitrogen required is 3.193 mol to produce 9.58 mol of ammonia.
Explain why the noble gases are unusually stable.
Answer:
Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level. This is the most stable arrangement of electrons, so noble gases rarely react with other elements and form compounds.
Explanation:
WORTH 20 POINTS PLZZZ HELP WILL GIVE BRANLIEST PLZZZ
A toaster transforms P energy into Q energy.
What do P and Q most likely represent?
P represents electrical energy, Q represents thermal energy
P represents thermal energy, Q represents electrical energy
P represents chemical energy, Q represents radiant energy
P represents radiant energy, Q represents chemical energy
Answer: P represents electrical energy, Q represents thermal energy.
Explanation: The toaster takes electrical energy from the electrical socket through wires and converts that into thermal energy that heats up/toasts the bread.
Answer:
P represents electrical energy, Q represents thermal energy
Explanation:
I am sorry if I get this wrong, but when I put it in the sentence - A toaster transforms electrical energy into thermal energy - it made sense to me, so I think that is the answer. I am sorry if this does not help.
PLEASE just help me!!! Its my last question!!!!
If you add a light bulb to the circuit, the filament in the bulb will resist the flow of electrons and convert energy into_____ and ______.
Question 2 options:
light and heat
energy and matter
electrons and neutrons
electrons and protons
Answer:
Light and heat
ur welcomeeeeeeee
Answer:
Light and Heat
Give the other guy brainiest
Explanation:
Thx for the point though
ОА
H+ HH
O H+ H → He
Oc He+
TH
Не
ODH +
Η
>
Ao H+HH OH
santa said he will eat shower curtian at 2 am