Answer:
b
Explanation:
Beryllium oxide is heated.
What is the chemical reaction equation?
Answer:
BeO
Reaction of beryllium with air
However, powdered beryllium metal does burn in air to give a mixture of white beryllium oxide, BeO, and beryllium nitride, Be3N2. Beryllium oxide is more normally made by heating beryllium carbonate. 2Be(s) + O2(g) → 2BeO(s)
**PLEASE HELP** If you were presented with a preserved brain specimen, but weren’t told whether it was from a human or a sheep, how would you determine which animal it was from? Describe at least three differences you would use to help determine your answer.
Answer:
size-humans brains are usually larger than animals, shape-some animal brains are shaped very odd, and the cerebrum-that is the part of the brain that makes us human.
The three difference between animal brain and human brain will be state out on the basis of size, shape and number of folds.
What is brain?Brain is the main central part of the nervous system of all organism present in the earth.
Three differences between the structure of human brain and animal brain.
Size of the human brain is generally larger than the animal brain.Shape of the brains for humans and animals are different as they both have differnt folds in that.Cerebrum is present only in mammals, so that some animals will not have cerebrum.Hence three differences between human and animal brains are listed above.
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I need help with this question ASAP this should have 2 answers
Answer:
The correct answer is B. and C. according to me!
Answer:
A. and C.
no explanation...
what must happen first before a change of state can occur (change in mass, change in position, change in volume, or change in energy)
Answer:
Change in energy.
Explanation:
An energy change is required to shift one state to another or do any of the other listed.
what events are typically earthquakes near large bodies of water
Answer:
tsunamis
they are literally water earthquakes that force tons of water ashore and wipes out cities and towns
20 A student draws the model shown below.
Sun
Earth
Which of these best compares the conditions at Location X and Location Y?
F It is day at Location X and night at Location Y.
GIt is winter at Location X and summer at Location Y.
H There are more hours of daylight at Location X than at Location Y.
1 The moon is brighter when viewed from Location X than when viewed from Location Y.
Answer:
There are more hours of daylight at Location X than at Location Y.
Explanation:
The student has created a model in the diagram in which sun and earth are presented. There are two point location on earth one is x and other is y. The x point is declined towards the sun which means that locations on point x receives more light than location Y. There will be more hours of daylight at Location x.
The best comparison of the conditions at Location X and Location Y is there are more hours of daylight at Location X than at Location Y.
What is the Sun and the Earth?The sun is the big spherical of heat and energy. The sun gives light. The Earth is the third planet of our solar system.
Thus, the correct option is C, There are more hours of daylight at Location X than at Location Y.
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Which is one factor that describes a Mediterranean climate?
has many trees
is found in inland areas
has cool and rainy winters
has little to no precipitation
PLEASE I WILL MARK BRAILIEST AND GIVE 30 PTS
Answer:
dry
polar
highlands
temperate marine
temperate continental
Explanation:
Which has a lower electronegativity and why? N or P? Use 'force of attraction' in your answer
Answer:
The electron sets divided among two particles are not really shared similarly. For instance, while the common electron sets are shared similarly in the covalent security in Cl2, in NaCl the 3s electron is taken from the Na iota and is fused into the electronic design of the Cl molecule - and the compound is most precisely portrayed as comprising of individual Na+ and Cl− particles (ionic holding). For most covalent substances, their bond character falls between these two limits. We showed beneath, the bond extremity is a helpful idea for portraying the sharing of electrons between molecules inside a covalent bond:
A nonpolar covalent bond is one in which the electrons are shared similarly between two particles.
A polar covalent bond is one in which one iota has a more noteworthy fascination for the electrons than the other molecule. On the off chance that this overall fascination is sufficiently incredible, the bond is an ionic bond.
Explanation:
Write the chemical formula for each:
ammonium nitrate
iron(II) sulfide
magnesium hydroxide
titanium(II) chloride
cobalt(III) oxide
potassium sulfide
barium acetate
magnesium bromide
lithium carbonate
potassium permanganate
Answer:
Ammonium nitrate is NH4NO3
iron(II) sulfate is FeSO4
magnesium hydroxide is MG(OH)2
titanium(II) chloride is TiCI2
cobalt(III) oxide is Co2O3
potassium sulfide is K2S
Barium acetate is C4H6BaO4
magnesium bromide is MgBr2
lithium carbonate is Li2CO3
potassium permanganate is KMnO4
What two things will you consistently do to maintain your mental health?
Answer:
Eat healthy food and exercise daily also undertake good healthcare
There are some special exercises that help to increase brain strength you can do them
Which group of elements can act as semiconductors?
Answer:
metalloids
Explanation:
I think that is the answer
According to the electronic configuration, group 14 of elements can act as semiconductors.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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Which statements are correct about a flowering plant? It may have both male and female flowers. It may have only male or female flowers. It may have both male and female parts in the flower. It must have both male and female parts in the flower.
Answer: the last one, It must have both male and female parts in the flower.
Explanation:
*2Al(OH), + 3H,SO, Al(SO4)2 + 6H2O
reaction type
Story that ends in i have never found such a kind person ever since
Answer:
I was traveling on a train where I fell asleep. someone stole my luggage in which I had money and other essentials. when the ticket checker arrived a lady paid my fine. she helped me a lot. when I told her about being robbed she helped me and took me to the police station and I found my bag. I insisted she take the money she paid for my fine but she said that in return you too help someone."I have never found such a kind person ever since.".....
Explanation: I think this is what you are looking for. Hope this helps.
Atomic number of Sodium?
Answer:
11
Explanation:
Answer:
Atomic number of sodium is 11.
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na. The free metal does not occur in nature, and must be prepared from compounds.
Please help me
How many hydrogen(H) atoms are in 3(NH₄)₂Cr₂O₇
And How many Nitrogen(N) atoms are in 3(NH₄)₂Cr₂O₇
Answer:
24 H
6 N
Explanation:
3 × (4 × 2) = 24 H
3 × 2 = 6 N
What does a low number on the pH scale say about a solution? O A. The solution is changing, OB. The solution is an acid. O C. The solution is neutral. O D. The solution is a base,
Answer: B) The solution is an acid.
Explanation:
Answer:
B
Explanation:
The equation shows the reaction between magnesium and chlorine to produce magnesium chloride.
Mg + Cl2 → MgCl2
Magnesium chloride consists of Mg2+ and Cl− ions.
Describe, in terms of electrons, how magnesium chloride is produced from magnesium and chlorine.
Answer: Mg is a cation and Cl is an anion
Explanation: In more detail, if you look at the periodic table, the group number (or columns) of the elements, describe how many valence electrons, or how many electrons the element has available to have a complete an electron shell. Magnesium being in group 2, it has one 2 electrons that will be "donated" to an anion that it bonds with. However, Chlorine being in group 17, (look at the single digit number for double digit groups), it has 7 valence electrons. Knowing that a full electron shell is usually 8 electrons, it needs only one. Since Magnesium has 2 valence electrons to give away, two atoms of Chlorine gas will then bind to the Magnesium, where the 2 Chlorine atoms will take the electrons to fill their shells. Magnesium Chloride, in terms of charges when in ions, [Mg]2+ and 2 [Cl]-1
Magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.
How is magnesium chloride formed from magnesium and chlorine?Magnesium chloride is an ionic compound which consists of magnesium ions and chloride ions.
A Magnesium atom forms ion by giving up two electronsTwo Chlorine atoms become ions by accepting one electron each.The oppositely-charged ions are attracted to each other.Therefore, magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.
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Zinc has a density of 7.10 g/cm3. If a cylinder of zinc weighing 46.77 g is completely immersed in a graduated cylinder that originally contains 33.33 mL of water, what will be the new water level? PLEASE HELP!!!! I NEED TO TURN THIS IN SOON!
The Density of a substance is simply defined as the mass of the subtance per unit volume of the substance i.e
Density = mass /volume
To solve the question given above, we'll begin by calculating the volume of the zinc. This can be obtained as follow:
Density of Zinc = 7.10 g/cm³
Mass of Zinc = 46.77 g
Volume of Zinc =?Density = mass /volume
7.10 = 46.77 / Volume
Cross multiply
7.10 × Volume = 46.77
Divide both side by 7.10
Volume = 46.77 / 7.10
Volume of Zinc = 6.59 cm³Finally, we shall determine the new volume of the water. This can be obtained as follow:
Volume of Zinc = 6.59 cm³ = 6.59 mL
Volume of water = 33.33 mL
New volume of water =?New volume of water = (Volume of Zinc) + (Volume of water)
New volume of water = 6.59 + 33.33
New volume of water = 39.92 mLTherefore, the new volume of water is 39.92 mL
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The process by which oxygen reacts with iron minerals in rock to form rust is called
Explanation:
your answer is oxidation
Answer:
Oxidation
Explanation:
2. Many calculations in chemistry will involve certain symbols, such as the symbol triangle or delta
What does this symbol stand for or mean?
A. "The total"
B. "The change in"
C. "The unit"
D. "The formula"
B. "The change in"
I saw that symbol a lot in chemistry and physics so I immediately recognized it.
which statement about the earth atmosphere is true
A.recent incease in carbon dioxide levels can contribute to a long--term cooling of eath's climate. B.a recent decrease in carbon dioxide levels will incease plant growth on eath.c.in the past few decades,carbon level has been rising.D.in the past few decades,carbon level has been falling
Energy is absorbed when a material ________ and is released when a material _______.
A. evaporates, melts
B. freezes, melts
C. melts, freezes
D. freezes, condenses
What eventually happens to all the energy in a food web? The energy in a food web finally??????
Answer:
All of the consumers and producers eventually become nourishment for the decomposers.
Explanation:
Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.
Which object would have a greater velocity change?
Answer:
The object with less mass will have a greater change in velocity
Explanation:
Answer:
the one with the smaller object mass becaise you get more force upon impact with less effort to move
Write the correct formula for the following compounds.
1. One ingredient in organic fertilizer contains an equal number of sodium and nitrogen atoms and three times as many oxygen atoms as nitrogen
atoms.
2. A major component of rocket fuel is hydrazine, a compound which contains two nitrogen atoms and twice as many of hydrogen atoms.
3. One of the gases responsible for acid rain contains sulphur atom for every three atoms of oxygen.
4. This compound contains one Lithium atom for every three atoms of Bromine.
5. Butane is a compound that is used as fuel in lighters and camp burners. It contains four carbon atoms and ten hydrogen atoms.
Answer:
79
Explanation:
What is the molecular formula of a compound with an empirical formula P2O5 and a gram-molecular mass of 284 grams? And why?
I am the life cycle that contains tiny undeveloped plants,
but I still have enough food for growth. Who am I?
Please help PLEASE
What are valance electrons used for?
Answer:
In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Is adding manganese dioxide to hydrogen peroxide, a chemical or physical change?
Answer: chemical change as a new product is formed