Answers
Answer:1. C
2.A
Explanation:
Related Questions
The answers are in the picture. this us the question, An increase in carbon dioxide production has led to an increase in global temperatures, which is causing glaciers to melt faster. If this trend continues, how will animals living in the polar regions be affected?
Answers
Answer:
D
Explanation:
because if there is no land for them they wont survive in only water
The increase in global temperature melts the ice in polar regions. This worsely affects the animals living there. Hence, they will migrate to other areas but this is in fact not possible for their adaptation in other areas and they may subject to extinction.
What is global warming ?Global warming is the rise of temperature of earth surface all over the world. The significant reason for global warming is green house effect. Gases like carbon dioxide, methane gas etc. are intensely absorbing temperature that is radiating back from earth.
Hence, these gases are increasing the atmospheric temperature in earth. Global warming have very serious impacts that going up to the major discussion to solve nowadays.
The melting of polar icebergs and rising of sea level definitely leads to the extinction of animals living in polar region. They cant be adopted to other regions and migrating to other areas does not save them. Hence, they will extinct from earth. Therefore, option d is correct.
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How many moles are in 28.0 grams of H0? (Hint: molar mass of H20 is 18.015 g/mol)
1232.25 moles
o
1.55 moles
0.64 moles
O
57.21 moles
Answers
Answer:
1.55 moles if i am correct.
Elements in the same period have the same number of
Which one ?
1.valence electrons
2.protons
3.Neutrons
4.orbits
Answers
Answer: Protons
Explanation:
i need help with this question 20 points and brainiest if ur right
Answers
Answer:
The volume is 8 cm³
Hey How are you?
Explanation:
How many moles of water are produced from the reaction of oxygen with four moles of propane (C3H8)? C3H8 + 5O2 --> 3CO2 + 4H2O
Answers
Answer:
Explanation:
The reaction is:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
We see, that the equation is ballanced.
As we have data from only one reactant, we assume the other is in excess.
Ratio is 1:4 (stoichiometry). We solve this, by a rule of three:
1 mol of propane can produce 4 moles of water
Then, 4 moles of propane, may produce
( 4 . 4 ) /1 = 16 moles of water can be made.
Remember, we always have to work with the limiting reactant.
How many electrons will strontium lose to satisfy the octet rule?
Answers
Answer:
Two Electrons.
Explanation:
Strontium is the atom with atomic number 38, and electron configuration is [Kr] 5S^2 which mean just two electrons more than Krypton which one of the Noble gases.
How many electrons do nonmetal atoms tend to gain when forming ions?
A. One or two
B. A number equal to their number of valence electrons
C. Only one
D. Enough to fill their valence shell
Answers
Answer:
D
Explanation:
I got that right:)
Nonmetal atoms tend to gain enough electrons to fill their valence shell when forming ions.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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If you roll a bowling ball and a marble at the same
speed, which one has more Kinetic Energy?
Answers
Answer:
The marble
Explanation:
Even though they both have kinetic energy, the marble has more since the weight of the bowling ball is heavier, leaving it to stop faster than the marble itself.
What’s Neon family number? And period?
Answers
Answer:
18 and Period 2
Explanation:
Neon (Ne), chemical element, inert gas of Group 18
Neons period on the periodic table is period 2.
A meteor is moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013. Does this statement describe the meteors speed or velocity?
Answers
Answer:
it's describes the velocity. since a direction was specifically given, that means it is displacement, and displacement is to velocity while distance is to speed
Answer:
since a direction was specifically given, that means it is displacement, and displacement is to velocity while distance is to speed
Explanation:
Kate and Janie are about to pour water into a beaker when they notice
the beaker has a crack at the bottom. What should the students do
with the beaker?
Answers
Answer:
Put the beaker in the broken glassware disposal and replace the beaker
Explanation:
Any beaker which has a crack could break/shatter if you apply heat. Also, cracked glassware is a lab safety hazard.
Which feature of the Galapagos Finch observed by Charles Darwin contributed to his theory of evolution?
1. feather color
2. wing shape
3. body size
4. beak size and shape
Answers
Answer:
Beak size and shape.
Explanation:
How much carbon dioxide will be formed if 12.5 grams of oxygen reacts with 7.2 grams of propane?
Answers
Answer:66 grams of Carbon Dioxide.
Explanation:
The common currency of chemistry is moles. So it is necessary to change the mass of propane to moles. Then write a balance equation so the moles of propane to moles of Carbon Dioxide. Finally moles of Carbon Dioxide must be changed to grams.
C 3 H 8 + 5 O 2 = =3 C O 2 + 4 H 2 O
This is the balance equation for the burning of propane in Oxygen.
From the equation it can be seen that 1 mole of propane makes 3 moles of Carbon Dioxide a ratio of 1:3
Convert 22 grams of propane to moles by dividing by the molar mass of propane.
3 x 12 = 36 grams
1 x 8 = + 8 grams
total = 44 grams/ mole.
22
44
= .5 moles of propane.
Using the ratio of 1:3 .5 = 3( .5) = 1.5 moles of Carbon Dioxide.
Now multiply 1.5 moles of Carbon Dioxide by the molar mass of Carbon Dioxide
1 x 12 = 12 grams
2 x 16 = +32 grams
total = 44 grams /mole.
1.5 moles x 44 grams/mole = 66 grams.
hope that helps :)
how many valence electrons does hydrogen have
Answers
Answer:
Since hydrogen is the first element, its electron configuration is 1s1.
Explanation:
It has only one electron in its valence shell.
Valence electrons are the outermost electrons or electrons in the largest energy level. Hydrogen has only one electron, so that electron is a valence electron.
Answer:
One valence electron !!
Explanation:
Give an example of a formula of an ionic compound and explain why the formula is ionic.
Please can someone help???
Answers
Answer:
NaCl
The overall ionic formula for a compound must be electrically neutral, meaning it has no charge.
When writing the formula for the ionic compound, the cation comes first, followed by the anion, both with numeric subscripts to indicate the number of atoms of each.
ions are formed when metals are combined with nonmetals
Identify the type of reaction
CaCl2 + AgNO3 --> AgCl + Ca(NO3)2
Answers
Answer:
It is Double Replacment
Explanation:
They traded bonds.
Balanced Equation is 2AgNO3 + CaCl2 = 2 AgCl +1Ca(NO3)2
Which property describes the shininess of an element?
Answers
Answer: Metals are shiny and lustrous with a high density. They have very high melting and boiling points because metallic bonding is very strong, so the atoms are reluctant to break apart into a liquid or gas.
Explanation:
sorry for not answering in less than 1 minute
Answer:
Metals are shiny and lustrous with a high density.
They have very high melting and boiling points because metallic bonding is very strong, so the atoms are reluctant to break apart into a liquid or gas.
I need help with question 4!!!!!!!
*Please choose correctly*
Thank youuuu
Answers
Answer:
hshzjndbejkxn. znkskakannamzm msk
please help as soon and best answer gets brainlest
Answers
Answer:
Mass, temperature, and phase.
I think temperature because the higher the temperature of a given quantity of a substance, more is its thermal energy. Similarly, for the same temperature, higher mass of a substance will contain more thermal energy.
Examples of polar molecules
Answers
Answer:
Water, Ethonal, Ammonia, Sulfur Dioxide, and hydrogen sulfide.
How many electrons are being shared between the two carbon atoms in the covalent compound ethyne? Ethyne has the structure: H−C≡C−H
Answers
Answer:
Three lines between the carbon atoms in the Lewis structure represent three covalent bonds. Each covalent bond is a shared pair of electrons, hence there are six electrons being shared between the carbon atoms in ethyne.
The number of electrons that are being shared between the two carbon atoms in the covalent compound ethyne is six.
What are covalent bonds?Covalent bond are formed by the sharing of electrons between two atoms.
In ethyne molecule two carbon atoms are present and between two carbon atoms three covalent bonds are present. And each covalent bond is formed by the sharing of two electrons. So three covalent bonds are formed by the sharing of 6 electrons.
Hence in ethyne 6 electrons are being shared.
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how many drops are in 655 mL of a can of soda?
Answers
Answer:
13100 drops
Explanation:
there are 20 drops in 1 ml so 20 x 655 = 13100
when a coil of wire is connected to a batter, an electric current flows through it. True or False
Answers
Answer:
True i think.
Explanation:
What force is necessary to accelerate a 1,200 kg car at a rate of 35 m/s2?
How much acceleration would the car have if a 30,600 N force was applied to
the car?
Answers
Explanation:
Given that,
Mass of a car, m = 1200 kg
Acceleration of the car, a = 35 m/s²
The force acting on the car is given by :
F = ma
F = 1200 kg × 35 m/s²
= 42000 N
If the force is 30,600 N, then acecleration is given by :
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{30600}{1200}\\\\a=25.5\ m/s^2[/tex]
Hence, this is the required solution.
39. Consider the following molecules:
(a) H2O
(c) CO2
(e) CC14
(b) NHA
(d) CIF
(i) In which compound are the bonds most polar?
(ii) Which compounds in the list are not polar?
(iii) Which atom in CIF is more negatively charged?
Answers
ii) h20
iii) i’m not sure
not fully sure but hope this helps!
which one is ittt? help please:)
Answers
Answer:
b
Explanation:
what is the physical state of water at - 25°C , 0°C and 100°C
have a great day
Answers
Answer:
The liquid form of water starts to become solid (ice) at this temperature.
Photosynthesis
+ carbon sunlight
dioxide
+
oxygen
sugar +
water +
Cellular
respiration
+ energy
Answers
What is the name of Br6F10 ?
Answers
Answer:
isopropyl alcohol
Explanation:
HOPE IT HELPS YOU
Put the following elements in order of increasing first ionization energy (lowest to highest): S, Ca, Mg,
CI
Answers
Answer: Ca, Mg, S, Cl
Explanation: general trends are IE increases as the number of electrons in the outermost shell, and decreases as the number of shells (and shielding effect) increases.
S outer 6, shells 3
Ca outer 2, shells 4
Mg outer 2, shells 3
Cl outer 7, shells 3
Ca has 2 outer, 4 shells —> lowest
others have 3shells
Mg 2outer, S 6, Cl 7