Answers
Answer:
A. Ba
C. Cu
D. H
Explanation:
HOPE THIS HELPS
Related Questions
In which layer of Earth's interior is the inferred temperature
6,000°C?
Answers
Answer:
outer core
Explanation:
the outer core is estimeted to be 6,000 C
20 Points!! 10 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answers
Answer:
1.a 2.d 3.c 4.b
Explanation:
Answer:
18.B
19.B
20.D
21.A
Explanation:
the neuron of the basic unit of structure and _____of the nervous system
I NEED THIS ASAP
thank you
Answers
Answer:
with out answer choices i will assume dendrites
Explanation:
Explain.Car side mirrors do not work when they are convered with frost. What does frost do no the surface of a mirror to cause a diffuse reflection?
Answers
The side mirrors play an important role in providing the safety of a car and also help the drivers to see the vehicles behind the car. Most of the side mirrors have a small heating element in them which helps to defrost or deice.
When ice, snow or even just condensation builds up on your mirror, it can severely limit your visibility. The frost makes the smooth surface of the mirror rough, so that the parallel rays are reflected in different directions.
There are extensive and multiple refractions which cause the distortion of light and so that the frost looks white, whereas ice is clear also called black ice due to the colour of road surface.
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How do intrusive rocks form?
A. Lava cools slowly outside a volcano
B. Magma cools slowly inside a volcano
C. Molten material is cooled quickly by water
D. Magma is ejected into the air and cools slowly.
Answers
Which of the following describes a chemical property of oxygen
Answers
Answer:
oxygen reacts with iron to form rust
Explanation:
The given options are;
(1)Oxygen has a melting point of 55 K.
(2) Oxygen can combine with a metal to produce a compound.
(3) Oxygen gas is slightly soluble in water.
(4) Oxygen gas can be compressed.
The statement that express the chemical property of oxygen from the question is that combination of Oxygen with a metal will produce a compound.
Oxygen can be regarded as one of the non metal with chemical formula O2One of the chemical property of oxygen (O2) is it's reaction with metal, when reaction occurs between oxygen and a metal, a metal oxide will be formed. The general equation goes thus(metal + oxygen → metal oxide)
When reaction occur between oxygen and iron which is a metal, iron Oxide is formed, which is a compound the reaction goes thus(4Fe+ 3O2 → 2Fe2O)
Rust is formed when there is exposure of iron to air.Therefore, reaction of oxygen with metal will give a compound, hence option 2 is right
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electron configuration for silicon
Answers
Answer:
1s2, 2s2, 2p6, 3s2, 3p2
Explanation:
see the guide on the given electron configuration examples
Can someone help me please.
Answers
Answer:
6 atoms since it says (6o2 and 6co2) notice how there's a 6 before the o2 and co2 ? (oxygen and carbon dioxide ?)
According to dimensional analysis, which of the following is the correct set-up
for the problem "How many milligrams are there in 67 kiolgrams?"
1 mg
a) 67 kg x
1 g
10 kg
10 g
108
b) 67 kg x
1
mg
X
1 kg
10 g
10² mg
(102
c) 67 kg x
g
7
1 kg
1 mg
10-3 kg
1 mg
d) 67 kg x
х
10 kg
A a
Bb
C C
Answers
Answer:
67 kg = 67 kg × 1×10⁶ mg / 1 kg
67 kg = 6.7×10⁷ mg.
Explanation:
The following data were obtained from the question:
Mass in Kg = 67 kg
Mass in mg =.?
Thus, we can obtain the mass in milligrams (mg) as follow:
1 kg = 1×10⁶ mg
Therefore,
67 kg = 67 kg × 1×10⁶ mg / 1 kg
67 kg = 6.7×10⁷ mg
Therefore, 67 kg is equivalent to 6.7×10⁷ mg
Which element does not have similar chemical characteristics as phosphorus (P)?
answers:
Antimony (Sb)
Nitrogen (N)
Arsenic (As)
Oxygen (O)
Answers
That said, there can be very significant differences in characteristics among the elements within a group, and that is certainly the case here. For example, free nitrogen exists predominantly as a molecular gas (N₂) and makes up about 78% of the atmosphere we breathe. Elemental arsenic (As), while in the same group as nitrogen, is naturally found in the solid state and is poisonous to humans (arsenic is sometimes included among the toxic heavy metals, although it’s technically a metalloid).
As a result of the reaction of 109.5 grams of a solution of hydrochloric acid with an excess of zinc, a gas with a volume of 3.36 litres Was released. Calculate the mass fraction of hydrochloric acid in the original solution
Answers
Explanation:
Volume of gas produced = 3.36 L
as molar volume of gas at STP is 22.4 L
so
no of moles of H2 = 3.36 ÷ 22.4 = 0.15 mole
from balanced reaction equation
Zn + 2HCl = ZnCl2 + H2
Ratio of no of moles between H2 : HCl is 1:2
as H2 moles = 0.15 mole
so
HCl moles reacted = 0.15 × 2 = 0.3 mole
as HCl molar mass = 1 + 35.5 = 36.5 g/mole
so Mass of 0.3 mole of HCl = 0.3 × 36.5 = 10.85 gram
fraction of HCl in Solution
= 10.85 ÷ 109.5 = 0.1
0.1 ×100 so HCl is 10% of solution mass
Does beryllium (Be) or Sodium (Na) have the same electron arrangement as Magnesium (Mg)? Why?
Answers
Answer:
Na has the most similar configuration.
Explanation:
Na electron configuration: 1s²2s²2p⁶3s¹ or [Ne] 3s₁
Mg electron configuration: 1s²2s²2p⁶3s² or [Ne] 3s²
Be electron configuration: 1s²2s² or [He] 2s²
This is because Na and Mg are right next to each other in the same period (horizontal).
Answer:
Na has the most similar configuration. Na electron configuration: 1s²2s²2p⁶3s¹ or [Ne] 3s₁. Mg electron configuration: 1s²2s²2p⁶3s² or [Ne] 3s². Be electron configuration: 1s²2s² or [He] 2s². Na and Mg are right next to each other in the same period
Directions: Use the words in the word box to complete the following sentences.
acceleration
gravity
counteract
resistance
balanced
force
When the forces acting on an object are _______________ , there is no change in the object's motion.
A _________________ acting on a resting object can cause the object to move.
On Earth, __________________ pulls all objects toward the ground.
When a force acts in the opposite direction of another force, the forces ______________ each other.
More than one force acting on a falling object can reduce its downward ____________________.
Air _____________________ is caused by molecules of air pushing against a moving object.
Answers
Explanation:
When the forces acting on an object are balanced , there is no change in the object's motion.
A force acting on a resting object can cause the object to move.
On Earth, gravity pulls all objects toward the ground.
When a force acts in the opposite direction of another force, the forces counteract each other.
More than one force acting on a falling object can reduce its downward acceleration
Air resistance is caused by molecules of air pushing against a moving object
Make a prediction about the relationship between electrons and molecular shapes
P.S WILL GIVE BRAINLIEST!
Answers
Do cells in many-celled organisms all look the same or different? Explain.
Answers
Cells in many-celled organisms can look the same or different, depending on the type of organism and the function of the cells.
In general,multi-cellular(many-celled) organisms have specialized cells that perform specific functions, such as muscle cells, nerve cells, and blood cells. These cells are different in structure and function, but they all work together to maintain the organism's health and survival.
For example, in humans:
Muscle cells are long and cylindrical, while nerve cells are long and thin with many branches. Blood cells are smaller and come in several different types, such as red blood cells, which carry oxygen, and white blood cells, which fight infection.On the other hand, some cells in many-celled organisms look the same, such as skin cells, which are flat and thin, and line the surface of the skin.Therefore, cells in many-celled organisms can look the same or different, depending on the function of the cells. While many-celled organisms have specialized cells, some cells have the same structure and function.
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Which describes an atom that has fewer neutrons than protons and more electrons than protons?
0negative compound
0positive compound
0positive ion
0negative ion
Answers
Answer:
Option d is correct = Negative ion
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral and when an atom loses its valance electron the number of protons increases and thus positive charge increased and atom form cation.
When an atom gain electron negative charge increase because of more number of electron thus atom form negative ion or anion. For example,
Anion formation:
X + e⁻ → X⁻
Cation formation:
X → X⁺ + e⁻
Thus option d is correct option.
What particle is in the nucleus that gives it a positive charge?
Answers
Answer:
proton
Explanation:
"Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom" this is definition per Google search
In part of which layer does heat flow by convection?
I think is inner core but I am not sure about it
Answers
Answer:
the mantle because it's just built different
Which of the aforement unique characteristics of earth do you like the most and why?
Answers
Answer:
The Earth rotates on its axis at a constant tilt.
Earths rotation on its axis at a constant tilt provides seasonal changes in the different part of the country. This resulted to the distribution of the heat of the sun from northern hemisphere and to southern hemisphere. Making areas with hot temperature may experience rainy season in a year. This will help production of crops or food supply and water supply available for living organism.
If the Earth's rotation is not tilted, then both the northern hemisphere and southern hemisphere will be covered with thick ice sheet. The equatorial region or near the equatorial region will experience tremendous warm temperature. Making our life on Earth not ideal for living.
Magnetic Field
Earth is protected by the magnetic from the dangerous radiation coming from the heat of the sun.
Water and oxygen
These two elements are essential for living organism in order to survive. The existence of waters proves that Earth temperature is conducive for living.
How many grams of silver nitrate are required to produce 0.25 mol of silver sulfide
Answers
In these problems start with the given and do dimensional analysis. I used the molar mass in the dimensional analysis.
What is the term called ¨I nutted
Answers
Answer:
it mean i cumed
Explanation:
Which statement best explains why heating a liquid affects its viscosity?
O The molecules move faster at higher temperatures and overcome attractions more easily.
O The molecules move faster at higher temperatures, and the attractions between them increase.
O The molecules move slower at higher temperatures and overcome attractions more easily
The molecules move slower at higher temperatures, and the attractions between them decrease.
Answers
Answer:
A
Explanation:
took test I'm pretty sure and found respond else where
Answer:
A) The molecules move faster at higher temperatures and overcome attractions more easily.
Explanation:
Edg 2020
Explain how the crystals of an igneous rock are used to help classify it. PLEASSSEEEE HELP ME
Answers
The crystals of igneous rock are formed due to different chemical composition, size and structure of the rocks
Formation of igneous rockThe crystals of an igneous rock are used to classify its own because the crystals of igneous rock are formed due to different chemical composition as well as size and structure. Igneous rocks are the type of rocks which are formed when magma cools and change into solid state.
They are classified on the basis of grain size, silica content, and silica saturation. The igneous rock is depend on the rate of cooling i.e. slow cooling causes the formation of large crystals whereas fast cooling produces small crystals. The igneous rocks are classified according to their chemical composition.
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The explanation that includes scientific principles (key concepts) is the...
A. Claim
B. Evidence
C. Reasoning
Answers
Answer:
B. Evidence
Explanation:
What is the role of the ozone?
A. It protects earth's surface from dangerous radiation.
b. It reflects the sun's energy.
c. It is the source of rain clouds.
D. It retains heat energy given up by water.
Answers
Answer:
It protects the earth surface from dangerous radiation
What did electrons from the ionized air do to the oil drops?
Answers
The famous oil drop experiment exploits that fact that an oil drop in an electronic field will get negative charge accumulation which can be balanced and observed in order to determine the charge of an electron.
50.5 kilometers to feet
Answers
50.5 km to ft is 165682.4
Answer:
the other guy is right its 165682.415
Which of the following statements incorrectly describes the assumptions of the kinetic molecular theory? Group of answer choices The particles that make up a substance have differing amounts of kinetic energy. Matter is composed of very small particles. Based on the state of matter a substance is in, it has varying particle arrangement. Particles stop moving completely when they are very cold.
Answers
J vre fdtnyscdvf. H Fr,I
Answer: B- Matter is composed of very small particles.
Explanation:
a. The particles that make up a substance having different amounts of kinetic energy.
b. Matter is composed of very small particles.
c. Based on the state of matter a substance is in, it has varying particle arrangement.
d. Particles stop moving completely when they are very cold.
The assumptions of KMT:
- Molecules are in constant random motion.
- They undergo elastic collisions; other than collisions.
- Particles do not interact with each other.
- The distance between particles is large compared to their size.
A, C, and D all have something similar to the assumptions that I have listed. B is something completely random and unrelated. (As far as KMT goes.)
What would happen if the amount of freshwater entering mono
lake increased?
Answers
Answer:
The salinity would decrease, which can lead to a huge change in the ecosystem. The brine shrimp and flies may for off, because there isn't enough salt for them. This would cause the bird population to decrease, because they wouldn't have the shrimp and flies as a food source.
During STATIC ELECTRICITY to what type of objects & direction do electrons ALWAYS move to?
