Answer:
3 g/cm^3
Explanation:
Density can be determined by mass divided by volume, or P=m/V.
This would be 47.4 grams (mass) / 15.8 cubic centimeters (volume). The units are grams per cubic centimeter, noted as g/cm^3.
Which family does this element belong to? It is a silvery-white, soft metal
that tarnishes rapidly in air and reacts with water, is a relatively soft metal
Alkali Metals
Alkaline Earth Metals
Halogens
Noble gases
Answer:
Alkali metals
hope it helps
Lara’s chemistry teacher has a decorative metal cube on her desk. The underside of the cube indicates that is made of stainless steel. However, Lara thinks it is too heavy to be this metal. She researches the density of stainless steel and finds it is 7.85g/cm³. She carries out this experiment to verify if the cube is actually made of stainless steel.
Answer:
D: 4, 5
Explanation:
Muscles, bones, skin, and
organs are all mainly made up of
(PICK
ONE) -> Fats Fiber Minerals | Protein.
Answer:
The answer is Protein.
9. Use dot and cross diagrams to represent the following compounds.
a. Sodium chloride (NaCl)
Answer:
I have attached the diagram
What is the mass of 4.2 x 10^24 molecules of Ca(OH)2
Can someone please help me with this
Answer:
b Mass +1 charge 0
Explanation: protons are neutral, so neutrons do not have charge
Which substance can be decomposed by chemical means? a. calcium b. argon c. sodium chloride d. aluminum
Which is most likely a molecule in a wall-filling material?
Answer:
C6H6
Explanation:
charge in the molecules of the wall material ,attracting and holding
Which of the following is not a physical property of a rock?
A. luster
B. electrical conductivity
C. melting point
D. density
Answer:
B
Explanation:
electrical conductivity of a rock cannot be determined by merely looking at the rock
PLEASE HELP
Chemical name for PbCl4
Answer:
Lead tetrachloride
Explanation:
Is the electron arrangement in a sodium ion
similar to neon or to argon?
Answer:
Just as some elements attain a noble gas configuration by gaining some extra electrons, other elements can more easily gain that configuration by losing some electrons. For a sodium atom, it is simply closer to get to the same configuration as neon than it is to get to the same configuration as argon.
What is the chemical formula for the limiting reactant in the reaction shown? Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.
1. What is the chemical formula for the limiting reactant in the reaction shown?
Answer: NO
2. Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.
Answer: 2NO + 2H2 —-> 2H2O + N2
Taking into account the definition of limiting reagent and balanced reaction, you get:
NO is the limiting reagent.The balanced reaction is 2 NO + 2 H₂ → 2 H₂O + 1 N₂What is the chemical formula for the limiting reactant in the reaction shown?The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
The reagent in excess will be the one that is not completely exhausted during the reaction, that is, they are those that are partially consumed, "excess" amount of that reagent. This is because the amount of product obtained from the reaction will always depend on the amount of limiting reagent in the reaction.
In this case, you can see that you have two reactants: NO and H₂. Having 4 moles of NO and 5 moles of H₂, you can see that no moles of NO are present in the products, but there is 1 mole of H₂.
This indicates that NO is the limiting reagent, since it is completely consumed, while there is 1 mole of H₂ in excess.
In summary, NO is the limiting reagent.
Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.Taking into account that the reagents are in stoichiometric proportions when the reagents are combined with each other without any of them, you can observe that the chemical equation is:
4 NO + 4 H₂ → 4 H₂O + 2 N₂
Dividing by 2 to get the lowest whole-number coefficients, the balanced chemical reaction is:
2 NO + 2 H₂ → 2 H₂O + 1 N₂
Learn more:
https://brainly.com/question/15235721Which statement is true because of Newton's second law?
Group of answer choices
You have to push a full shopping cart with more force than an empty shopping cart.
A soccer ball will not move until someone kicks it.
For every action there is an equal and opposite reaction.
A skateboarder travels at a constant speed when there are balanced forces acting on him.
Answer:
You have to push a shopping cart with more force than an empty shopping cart.
Explanation:
Hope this helps! Plz vote brainliest
Explain why energy sources do not have 100% efficiency. Why do you think some have lower efficiencies?
Answer:
Energy sources do not have 100% efficiency because the processes of energy conversion to usable forms involves energy losses.
Some have lower efficiencies due to; energy losses in form of heat during conversion, poor technology applied during conversion of energy and lack of desire equipment to use in the energy conversion system.
Explanation:
The desired form of energy for use is derived from conversion of energy from the source using an energy converter into another form which is usable. The efficiency of the energy converter is calculated as;
л = output energy/input energy
The efficiency of energy is limited to the cost of equipment required for conversion from energy source by the energy converter to a form which is usable. Additionally, because energy sources are scarce, the technology to use in energy conversion is a factor affecting energy efficiency in that high efficiency will require advanced technology with better equipment leading higher costs of that energy form. when heat losses are involved during energy conversion, efficiency lowers, thus its better if such losses are used as energy input in another system.
A bird on a long migration flies 63 kilometers per hour for 2900 kilometers. How long does he fly?
Answer:
46.031
Explanation:
easy stuff
A student sets up an experiment to test the factors that affect the
solubility of sodium chloride. The student places 5.Og of sodium chloride in
four beakers containing 250 mL of water. The student places each beaker
on a different hot plate and heats them to the following temperatures:
Beaker A: 30°C, Beaker B: 40°C, Beaker C: 50°C, Beaker D: 60°C. In which
beaker would the sodium chloride dissolve at the fastest rate? *
Beaker A
Beaker B
Beaker C
Beaker D
Answer:
Beaker D
Explanation:
Since Sodium Chloride melting point is 1,474°F (801°C) the logical possible answer would be D: 60C.
Harry stores toxic chemical waste in a large steel tank that has only 15% of its volume underground. Jena lives in the wilderness and has her own gas pump connected to a 1,500-gallon tank of gasoline buried ten feet underground near her garage. Lars keeps three large tanks filled with formaldehyde and battery acid in his basement. Which of these people are covered by federal regulations regarding USTs?
Answer:
Only Harry and Jena
Explanation:
Under federal regulations, an UST is any one or a combination of tanks such that the volume of an accumulation of regulated substances is 10% or more beneath the surface of the ground.
Any UST system holding a mixture of hazardous waste and other regulated substances are also are not covered by federal regulations regarding USTs.
Farm or residential tank of capacity more than 11 gallons used for storing motor fuel is covered by federal regulations regarding USTs.
According to the given question,
Only Harry and Jena are covered by federal regulations regarding USTs.
How many significant figures are in 20600?
There are 3 significant figures in 20600.
what is the molecular equation to AgNO3 (aq) + H2S(aq)?
There are two forms of chemical equations
Ion equation: written in ion form (as separated ions) which forms the net ionic equation after removing an ion spectator
Molecular equation: written in molecular form
2AgNO₃(aq) + H₂S(aq) ⇒ Ag₂S(s) + 2HNO₃(aq)
The above reaction can be included in a double replacement reaction⇒ an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
It can be shown the existence of the precipitation reaction, which is the formation of insoluble Ag₂S (not dissolve)
Which system works with the reproductive system? (Hint, its not C)
A. Endocrine system
B. Excretory system
C. Respiratory system
D. Skeletal system
Answer:
A
Explanation:
Option B, Excretory System
Predict which surface will melt ice faster. Wood or metal? Why?
Answer:
I believe wood wood melt it faster. Why, because of how compact it is. It would be warmer. Metal would be a cooler temperature.
Explanation:
If an element gives away an electron, will it form a positive ion or a negative
ion?
Answer:
posotive
Explanation:
electrons give off negative pulse so take one away
Mrs. K is trying to rearrange her living room. She uses 150 N of force to move a 600 g table. The table does not move. How much work is done?
90,000 J
4 J
600 J
0 J
Answer:
0J
Explanation:
Work = Force * Distance
Since the distance (or the displacement) in this problem is 0, hence, no work is done. W = 150*0 = 0. The mass of the object is just trying to trick you. Hopes this helps!
two atoms With diferent mass number but the same atomic number are called
Answer:
they are called isotopes
Forensic psychiatry focuses on the relationship between human behavior and criminal justice.
O True
O False
By mistake, a quart of oil was dumped into a swimming pool that measures 25.0 m by 30.0 m. The density of the oil was 0.750 g/cm3. Assuming the oil spread into a uniform, thin layer over the water, how thick was the oil slick?
The oil slick thick = 1.257 x 10⁻⁶ m
Further explanationVolume is a derivative quantity derived from the length of the principal
The unit of volume can be expressed in liters or milliliters or cubic meters
The volume of the aquarium is almost the same as the beam namely:
V = length x width x height
1.06 quart = 1 L
1 quart = 0.943 L=0.943 x 10⁺³ m³
volume of oil = volume of swimming pool
0.943 x 10⁺³ m³ = 25 x 30 x h
[tex]\tt h=\dfrac{V}{A}\\\\h=\dfrac{0.943\times 10^{-3}~m^3}{25\times 30~m^2}\\\\h=1.257\times 10^{-6}~m[/tex]
15 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answer:
Questions 1 is Letters
Questions 2 is H I believe
Questions 3 is hardness
Explanation:
hope I helped
Answer:
1. c
2. a
3. b
you're welcome
at the bottom of the ocean a rock has a mass 25 g. At sea level the same rock wilk have a mass of:
less than 25 g
more than 25 g
exactly 25 g
Answer:
exactly 25 g
Explanation:
The mass of an object is universally the same every where. Even in outer space.
This is because, mass is the amount of matter contained in a substance. Since there is no loss in the amount of matter, the mass of the body stays the same.
It is weight that is subjected to changes with the value of gravity. Weight differs from places to places. A place with higher gravity will have a higher value of weight for any given mass.Mass accounts for every individual matter present in a substance.
When they remain the same, mass does not change. Only a change in the amount of matter in a body can cause variation in mass.
Therefore, at the bottom of the ocean, a body will have the same mass as on top and even at sea level.
Answer:
c. exactly 25 g
Explanation:
The expression 6.020 x 10^23
Answer:
3
Explanation:
The spongy layer of leaves stores water and food.
True
False
Answer:
True
Explanation:
The main function of the spongy layer is to temporarily store sugars, and amino acids synthesized in the palisade layer of the leaf (the palisade carries out most of photosynthesis)
