Answer:
A) Cu
(copper)
When a scientist analyzes experimental results, the scientist is generally:
What is the answer 24.3m
standard units of measure for density
Answer:
g/cm³ for solids,
g/ml for liquids
g/L for gases.
Explanation:
Though SI unit of density is kg/m³, for convenience we use g/cm³ for solids, g/ml for liquids and g/L for gases. Mathematically, density is defined as mass divided by volume: ρ=m/V
Zn + 2HCl ---> ZnCl2 + H2 1. Is the equation above balanced or unbalanced? How do you know? (Hint: How many atoms of each type of element are there?)
Answer:Balance. Acid+metal->salt+hydrogen.1 molecule od zinc contains 1 zinc atom.2 molecule of HCl contains 2 atoms hydrogen and 2 chlorine.1 molecule of Zncl2 contain one atom of zinc and two atom of chlorine.And two 2 atoms of hydrogen.
Explanation:
What’s the first thing you should always do before starting a lab
Review your instructions
How are elements with atomic masses greater than Uranium’s made?
Answer:Atoms heavier that uranium do not exist in nature.they must be synthesized in a particle accelerator
Explanation:
What are the charges on simple ions formed from atoms of group 2A elements
Explanation: Atoms in Group 2A have 2 valence electron and lose 2 electron to gain an octet. These cations have +2 charge. Transition Metal Cations Electrons are removed from ns subshell before the (n-1)d subshell Fe atom = [Ar]4s23d6 Fe2+ ion = [Ar]3d6 Fe3+ ion = [Ar]3d5 The 4s electrons have been removed.
If one gram of water has a volume of one milliliter, what would the mass of one liter of water be in kilograms?
Which amino acid is least likely to produce a hydrogen bond with water or polar molecules?
Which of the samples pictured is most likely a nonmetal?
Answer:
its C
Explanation:
Which of the following is NOT a "big idea" in chemistry?
A. Every chemical process uses or produces energy.
B. Elements are held together by strong forces called chemical bonds.
C. Matter is created or destroyed in order to form new chemical substances.
D. Chemical reactions are processes in which reactants change to form products.
What is the ion symbol for Xenon ?
Answer:
Xe
Explanation:
if ur talking about what it is for xenon
It has been proposed that mitochondria and chloroplasts are modern descendants of early prokaryotic cells that began to reside and gradually evolve within primitive cells.
Answer:
mitochondria and chloroplasts both have prokaryotic ribososmes
Explanation:
Mitochondria and chloroplasts are the modern descendants of early prokaryotic cells. These lived in primitive cells and later developed into part of them. This hypothesis is supported because both mitochondria and chloroplasts have their own primitive ribosomes. These two organs contain 70s ribosomes.Mass = 35g Volume = 7cm³ What is the Density?
Answer:
The answer is
5.0 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 35 g
volume = 7 cm³
The density is
[tex]density = \frac{35}{7} \\ [/tex]
We have the final answer as
5.0 g/cm³Hope this helps you
A six row combin harvests 266 pounds of corn per min. How many bushels of corn does it harvest per hour? (Note: 1 Bu = 56 Lbs) Round to the nearest Whole Number.
Answer:
The six-row combin harvests 285 bushels of corn per hour.
Explanation:
The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, you can apply the following formula:
a ⇒ b
c ⇒ x
So: [tex]x=\frac{a*b}{c}[/tex]
In this case you can apply it in the following way: if 56 pounds is equal to 1 bushel, 266 pounds to how many bushels is it?
[tex]x=\frac{266 pounds*1 bushel}{56 pounds}[/tex]
x=4.75
This is, a six row combin harvests 4.75 bushels of corn per min.
So, being 1 hour equal to 60 minutes, you can apply the following rule of three: if in 1 minute a six-row harvester harvests , in 60 minutes how many bushels of corn it harvests?
[tex]bushels of corn=\frac{60 minutes*4.75 bushels of corn}{1minute}[/tex]
bushels of corn= 285
The six-row combin harvests 285 bushels of corn per hour.
The density of liquid mercury is 13.6 g/mL. What is the mass of a 175 mL sample of mercury?
Answer:
The answer is
2380 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density of mercury = 13.6 g/mL
volume = 175 mL
The mass of the metal is
mass = 13.6 × 175
We have the final answer as
2380 gHope this helps you
What is the main cause of global convection currents?
Answer:
The main cause of global convection currents is the uneven heating of the earth by the sun. Hope this helped! :)
The main cause of global convection current is differential heating, that is the temperature difference in different levels of atmosphere.
What is convection current?Convection current is the heat transfer by fluid movement in the earth crust between different temperature regions. The density of fluids differs due to the temperature gradients and thus heated fluids raises and cooled fluid sinks.
The heated fluid movement causes the movement of plates of earth. The molten rock deep inside the earth crust circulates by the convection current.
Hence, the main cause of global convection current is the differential heating of the atmosphere.
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how do I explain chromotography without memorizing
this is what i usually do -
watch videos based on the topic and take notesread articles based on the topic watch documentaries based on the topicthis is what works best for me it may work different for you but using these methods i'm able to do well on tests without really memorizing much
hope that helps :)
Answer:
its good
Explanation:
it's great vsvhebejehsdhdbehhebehdbeh
Which rock is an example of a clastic sedimentary rock
Answer:
common sedimentary rocks include sandstone, limestone, and shale.
What is the name of alkane having seven carbons atoms in the chain????
Answer:
n-heptane is your answer
Answer:
Hence, C5H12 is called pentane, C6H14 is called hexane, C7H16 is called heptane and so forth. Straight-chain alkanes are sometimes indicated by the prefix n- (for normal) to distinguish them from branched-chain alkanes having the same number of carbon atoms.
Explanation:
This element has three fewer protons than oganesson 
Answer:
ununpentium
Explanation: this is element 115, Oganesson has 118
The atomic number of oganesson is 118. The element which is having three fewer protons than oganesson is moscovium (Mc) (115).
What is oganesson?
Oganesson is a newly found element synthesized in 2002 and is placed as 118'th element in the periodic table. In modern periodic table, the elements are arranged based on their atomic number.
Atomic number is the number of protons in the atom as well it is the number of electrons in the neutral atom. For a neutral atom the number of electrons are protons are equal.
Thus in a neutral atom the positive charges are neutralized by equal number of negative charges.
Thus, for 118'th element, there are 118 protons, three fewer from this means, there are 115 protons, the 115'th element in the modern periodic table is moscovium.
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curd and milk are what acid
Answer:
lactic acid
Explanation:
and this is broken down by the enzyme lactase
Mutations are changes in the genes of living things. Mutations are common in all life forms and usually harmless. In fact, sometimes they help organisms survive. However, people often think that the word mutation means something dangerous. Which best describes the question "Why do most people think mutations are dangerous?" a scientific question, because it asks about mutations that happen in nature a scientific question, because it asks about most people instead of just a few not a scientific question, because it asks about what people think instead of how nature works not a scientific question, because it asks about how mutations can be helpful to life in nature (ANSWER IT FIRST AND GET BRAINLIST)
Answer: A
Explanation:
Answer:
C
Explanation:
According to ______Law, if the temperature remains constant, doubling the pressure will _______the volume of the gas.
Answer: According to Boyle's Law, if the temperature remains constant, doubling the pressure will halve the volume of the gas.
Explanation:
49.2 m = _________ hm
If 5.0 g of copper cools from 35.0oC to 22.6 oC and loses 23.6 J of heat, what is the specific heat of copper? a. 0.038 J/(g. oC) b. 0.62 J/(g. oC) c. 0.076 J/(g. oC) d. 0.38 J/(g. oC)
Answer:
c = 0.38 J/(g-°C)
Explanation:
Given that,
Mass of copper, m = 5 g
Initial temperature, [tex]T_i=35^{\circ} C[/tex]
Final temperature, [tex]T_f=22.6^{\circ} C[/tex]
When copper cools, it looses 23.6 J of heat. We need to find the specific heat of copper. The heat lost is given by :
[tex]Q=mc\Delta T[/tex]
c is specific heat
[tex]c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{23.6}{5\times (22.6-35)}\\\\c=0.38\ J/g-^{\circ} C[/tex]
Hence, the correct option is d.
I need help with this please.
SER
In which direction does the Sun appear to move across the sky?
from west to east
O from east to west
O from north to south
from south to north
Answer:
east to west is the answer
4. What is the proper way to prepare an acid solution?
Answer:
Always add acid to a large volume of water. The solution may then be diluted with additional water to make one liter. You'll get an incorrect concentration if you add 1 liter of water to the acid.
An acid is concentrated solution hence, it should be added to considerable quantity of water. The required volume can then be adjusted by adding more water.
What are the properties of an acid?Acids form aqueous solution and have the property of electric conductivity. Acids reacts with other molecules by forming a covalent bond.
Acids are corrosive in nature, sticky to touch, tastes sour and have strong smell.
Acids can be qualitatively detected through litmus test. They turn blue litmus paper red. Their pH is < 7 on pH scale.
Acids can be classified as:
Strong acids - are the acids that dissociate in water completely.Weak acids - are the acids that partially dissociate in water.Chemically, acids can react with other metals, carbonates and bases. Common examples of acids are vinegar (acetic acid), hydrochloric acid (HCl), sulfuric acid (H2SO4) etc.
Acids are found in food items such as citrus fruits. Acetic acid is widely used in certain food preparations and as food preservative. Acids are commercially used in dyes, paints and in soft drinks.
Thus, acids are important in many chemical reactions.
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Which process is an example of a chemical change? drying clothes in the dryer heating a cup of tea chopping a tree activating a glow stick