Answers
Answer:
pistil
Explanation:
Related Questions
What happens in cellular respiration?
A. Glucose reacts with water in the stomach to produce
energy.
B. Glucose and oxygen react to form carbon dioxide, water,
and heat.
O C. Glucose is broken down to provide oxygen for all cells in
the body.
D. Glucose is formed from smaller hydrocarbons in the body.
Answers
Answer:
Option B
Explanation:
The reaction can be summarized as
6O2+C6H12O6——›6CO2+6H2O+Heat
Answer:
B
Explanation:
The ___ is the nations consumer protection agency to help prevent fraud , deception , and unfair business practices .
Answers
Answer:
I think it B
Explanation:
Answer:
The answer is FTC or C!!!!!!!!!!!!!!!!!!!!!!!!!!!
Explanation:
2. Water is an example of a(n)
a. inorganic b. organic
compound.
d. none of these
c. carbon
Answers
it would be A ,inorganic Compound
Explain why the noble gases are unusually stable.
Answers
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:
Which set of elements below is the most similar in chemical behavior?
OH, Be, SC
O Fr, Ra, Rf
O TI, V, Cr
O Be, Ca, Ra
Answers
Answer: Be, Ca, Ra
Explanation:
Elements are distributed in groups and periods in a periodic table.
Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons.
Berrylium (Be) , Calcium (Ca) and radon (Rn) are elements which belong to Group 2. They have 4, 20 and 88 electrons respectively and contain 2 valence electrons each and thus can lose two electrons to complete their octet. Thus they will show similar chemical properties.
The chemical reactivity of elements is governed by the valence electrons present in the element.
What state (solid, liquid, gas) is mercury in at the boiling point of water, 100°C? Explain.
Answers
Mercury is in a liquid state
Mercury's melting point is somewhere around -34 Degrees Celcius. Thus it should be assumed it will be a liquid at this temperature. Not a gas however as mercury's boiling point is somewhere in the 600 Degree range
A consequence of burning fossil fuels is
warming.
Answers
. Both element K and element L are found in period 3 of the periodic
table. If K is in group 13 while L is in group 15, which of the two
has a greater atomic number? Explain.
Answers
Answer: L element has greater atomic number.
Explanation:
The periodic table contains vertical columns called as groups and horizontal rows called as periods.
Period 3 contains 8 elements which are sodium, magnesium , aluminium , silicon , phosphorous , sulphur, chlorine and argon.
K element which belongs to group 13 is aluminium with atomic number of 13 . L element which belongs to group 15 is phosphorous with atomic number of 15.
Thus L element has greater atomic number.
Fill in the blank with the correct vocabulary word: H20 (1) --> H2 (g) + O2 (g) Water is the and hydrogen gas is the
Answers
Answer:
Water is reactant and hydrogen gas is product
Explanation:
Which substance is a pure substance? Cereal Silver Jelly bean Shampoo
Answers
Answer: Silver
Explanation:
Answer:
SILVERRRRRRRRRRR
Explanation:
Which subatomic particle gains energy from the flame and then loses it in the form of light?
Answers
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)
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?
Answers
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]
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
Answers
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.
Based on the organization and colors in the periodic table, which two elements do you think are most similar in terms of their properties magnesium (Mg) , barium (Ba) , and gold (Au) ? Explain .
Answers
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.
To learn more about periodic table, refer to the link below:
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how elements are arranged in the groups of periodic table
Answers
Answer:
Explanation:
The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency.
Which change of state is shown in the model?
condensation
deposition
boiling
freezing
Answers
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!
Write a caption for a photo of a polluted city.
Answers
Answer:
ok
Explanation:
this is a picture of a city that we have made worse everyday
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.
Answers
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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The two liquids of the mixture having the same boiling point cannot be seperation of distillation Explain.
Answers
Answer:
True
Explanation:
Two liquids of a mixture having the same boiling point cannot be separated using the process of distillation.
Distillation is one of the process of physical separation techniques.
It relies on physical property called the boiling point. In a fractionating column, a mixture is heatedAs the boiling point of the each component compound in the mixture is reached, the compound rises up within the column.So without a difference in the boiling point of the compound that makes up a mixture, the separation by distillation will not be possible.
which graph above best represents the relationship between the volume and the pressure of a gas?
Answers
The graph (A) best represents the relationship between the volume and the pressure of a gas.
What is pressure?The force was applied perpendicular to an object's surface per unit area across which that force is spread is known as pressure. The relationship between pressure and volume can be understand with the aid of ideal gas law.
PV=nRT.
where, P is pressure, V is volume.
It can be seen that when temperature will kept constant then pressure will be inversely proportional to the volume. It can be shown as:
P ∝ 1/V.
Therefore, graph A represent relationship between pressure (P) and volume (V).
To know more about pressure.
https://brainly.com/question/14760196.
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What does the formula ΔH − TΔS determine?
entropy
Le Châtelier’s principle
enthalpy
Gibbs free energy
Answers
Chemical ____ are used to represent compounds
Answers
Answer:
Its formula :)
Explanation:
hope this helps <3
what is 2 multiplied by 4
Answers
Answer:
8
Explanation:
Answer:
the answer is 8 :D
Explanation:
2x4 also known as 2+2+2+2 is equal to 8
PLEASE HELP.
how many grams of K2SO4 are in 1.18x10^24 atoms?
Answers
Answer:
Mass = 331.17 g
Explanation:
Given data:
Mass in gram = ?
Number of atoms of K₂SO₄ = 1.18 × 10²⁴ atoms
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
1.18 × 10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms
0.19× 10¹ mol
1.9 mol
Mass of K₂SO₄:
Mass = number of moles × molar mass
Mass = 1.9 mol × 174.3 g/mol
Mass = 331.17 g
One of your classmates tells you, “Since atoms are the basic building blocks of matter, all atoms have to be the same. Do you agree or disagree with this statement? Explain your reasoning.
Answers
ill mark brainliest plz help
Answers
Answer:
option d
Explanation:
please mark me brainliest
Answer: S₅Br₆
Explanation: The prefix “penta-“ means five, and the prefix “hexa-“ means six.
PLZ help can you find a picture of the IODINE PLANITERY model please help
Answers
Answer:
yes I can find a pic of the iodine planetary model
Explanation:
U my friend OMG ^-^
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.
Answers
Answer:
Its answer choice C
According to Kepler’s 3rd law of motion, which planet will have the shortest orbital period?
A). Jupiter
B). Mercury
C). Earth
D). Saturn
Answers
Answer:
B: Mercury
Explanation:
Yuh
Calcium carbonate forms limestone, one of the most common rocks on Earth. It also forms stalactites, stalagmites, and many other types of formations found in caves. When calcium carbonate (CaCO3) is heated, it decomposes to form solid calcium oxide and carbon dioxide gas. Write the balanced equation and calculate how many liters of carbon dioxide will be produced at STP if 2.38 g of calcium carbonate reacts completely?
Answers
Answer: [tex]CaCO_3(s)\rightarrow CaO(s)+CO_2(g)[/tex] , 0.533 L
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
[tex]CaCO_3(s)\rightarrow CaO(s)+CO_2(g)[/tex]
According to avogadro's law, 1 mole of every substance occupies 22.4 L of volume at STP.
Number of moles =[tex]\frac{\text {given mass}}{\text {Molar mass}}[/tex]
moles of calcium carbonate = [tex]\frac{2.38g}{100g/mol}=0.0238mol[/tex]
As 1 mole of calcium carbonate produces = 22.4 L of carbon dioxide at STP
Thus 0.0238 moles of calcium carbonate produces =[tex]\frac{22.4 L}{1}\times 0.0238=0.533L[/tex] of carbon dioxide at STP
The balanced equation is [tex]CaCO_3(s) \rightarrow CaO(s) + CO_2(g)[/tex]
The number of liters of carbon dioxide that should be produced is 0.533L
Law of conversation of mass:As per this law, the mass could neither be developed nor be destroyed. So, the mass of products should be equivalent to the mass of reactants. The number of atoms of every element has to be the similar on reactant and product sides. Due to this, the chemical equations are balanced.
[tex]CaCO_3(s) \rightarrow CaO(s) + CO_2(g)[/tex]
Avogadro's law:As per this law, 1 mole of every substance occupies 22.4 L of volume at STP.
So,
We know that
Number of moles = [tex]given\ mass \div molar\ mass[/tex]
Now the moles of calcium carbonate is [tex]= 2.38 \div 100[/tex] = 0.0238 mol
Since 1 mole of calcium carbonate generated = 22.4 L of carbon dioxide at STP
So, 0.0238 moles of calcium carbonate generated
[tex]= 22.4 \div 1 \times 0.0238 \\\\= 0.533L[/tex]
of carbon dioxide at STP
Learn more about the equation here: https://brainly.com/question/15844891