Answer:
Your correct answer is true.
Explanation:
A plant only requires the correct chemicals to make plant food. ( True )
A sample of a substance has a mass of 4.2 grams and a volume of 6 milliliters. The density of this substance is___ grams/milliliter.
Answer:
Answer:- Density of the substance is 0.7
i believe
the members of group IA are called alkali metals. give reason 2 marks
Explanation:
Hey, there!!
Group IA elements are called alkali metals because they are highly soluble in water and produce hydrogen and soluble bases.
For, Eg:
[tex]2na + 2h2o = 2naoh + h2[/tex]
[tex]2k + 2h2o = 2koh + h2[/tex]
Hope it helps...
How are states of matter different at an atomic scale?
Answer:
The bonds that exist between their atoms and molecules differ on an atomic scale.
Explanation:
The three basic states of matter are solid, liquid, and gas. The major difference between them is the strength of the bonds that hold their molecules together. This affects the way that the molecules interact with each other.
The intermolecular forces binding solids together are very strong. This makes solids rigid and not able to move about freely, but rather, only able to vibrate about a mean position.
The intermolecular forces binding liquid atoms together are a lot weaker than that of solids. This makes liquids able to flow.
The intermolecular forces binding gas molecules together are the weakest. As a result, the gases can move about freely and occupy no definite volume.
A process in which an acid reacts completely with an appropriate amount
of alkali to produce salt and water only is called
reaction *
Disproportionation
Hydrogenation
Dissociation
Neutralisation
Answer:
Neutralisation
Explanation:
HCl + NaOH = NaCl + H2O
An unknown sample of mystery element T is analyzed. According to the data 7.42% of the element is ^6T and 92.58% is ^7T. The true mass of ^6T is 6.02amu and 7.02amu for ^7T. Calculate the average atomic mass and identify the element.
Answer:
[tex]\boxed{\text{6.95 u; Li}}[/tex]
Explanation:
1. Atomic mass of T
To get the atomic mass of T, you calculate the weighted average of the atomic masses of the isotopes.
That is, you multiply the atomic mass of each isotope by a number representing its relative importance (e.g.., its percent of the total).
[tex]\begin{array}{ccrcr}\textbf{Atom} & \textbf{Mass/u} &\textbf{Percent} & \textbf{Calculation}& \textbf{Result/u}\\^{6}\text{T}& 6.02 & 7.42 & 6.02 \times 0.0742 & 0.45\\^{7}\text{T}& 7.02 & 92.58 & 7.02 \times 0.9258& 6.50\\& & &\text{TOTAL } = &\textbf{6.95}\\\end{array}[/tex]
2. Identity of T
Lithium has an atomic mass of 6.64 u.
Element T is lithium.
State the law of moment of force.
Explanation:
when in equilibrium condition the total sum of anti clockwise moment is equal to the sum of clock wise moment
Answer:
Newton's First Law of Motion states that in order for the motion of an object to change, a force must act upon it. This is a concept generally called inertia.
Newton's Second Law of Motion defines the relationship between acceleration, force, and mass.
Newton's Third Law of Motion states that any time a force acts from one object to another, there is an equal force acting back on the original object. If you pull on a rope, therefore, the rope is pulling back on you as well.
Explanation:
How many pennies are in $2,020.20?
Answer:
202,020 pennies
Explanation:
The amount of pennies in 1 dollar is 100.
Basically, you just multiply the whole dollar amount (2020) by 100 and then add 20 to find the amount of pennies.
(2020)(100)+20= 202,000+20= 202,020 pennies.
Answer:
202,040 pennies
Explanation:
$1 is equal to 100 so just multiply 100 by 2,020 and then you can add the extra 20 cents
Which do all cells need in order to function?
oxygen
water
carbon dioxide
offspring
Answer:
oxygen is needed for all cells to function
If the density of mercury is 13.6g/ml, what is the mass in grams of 3426 ml of the liquid?
A copper cylinder, 12.0 cm in radius, is 44.9 cm long. If the density of copper is 8.90 g/cm^3, calculate the mass in grans of the cylinder. (Assume pi=3.14
Answer:
Explanation:
Mass=density×volume
Mass=13.6g/ml×3426ml
Mass=46,593.6 g
A turtle moves at a speed of 1.0km/h. How fast is the turtle moving in meter per second (m/s)?
The speed of the turtle is 9.41 centimeters per second.
Calculation of speed:We know that
Speed of small turtle = 566 furlong/fortnight
1 furlong = 20,116.8 cm
And,
1 fortnight = 1,209,600 seconds
So,
The speed of the turtle is 9.41 centimeters per second.
Find out more information about the speed here: https://brainly.com/question/7359669?referrer=searchResults
1. Convert 1m3 to cm3.
Answer:
1000000 cubic centimetre
Answer:
1m^3 = 1000000cm^3
Explanation:
how much calcium in gram is present in Ca(NO3)2 that contains 1.4 gram of Nitrogen
Answer:
28.57 grams are in (NO3)2
Explanation:
I am doing an exam test and I need help! I don't get this question at all! "What determines the chemical and physical properties of a mineral?" If you can answer less than 10 minutes that would be great! Thank you!
Answer:
A mineral is an inorganic solid substance formed naturally in the ground having a definite physical and chemical properties.
The internal atomic structure or arrangmenet of atoms of a mineral determines the chemical and physical properties of the mineral.
For example: diamonds and graphite, atmoic structure of diamond is rigid tetrahedral network providing chemical and physical properties of diamond.
Giselle is working with a chemical substance in a laboratory. She observes that when the chemical is heated, it gives off a gas. She assumes that the gas is oxygen but decides to test this assumption to verify it. Which type of scientific knowledge is Giselle’s assumption?
HYPOTHESIS.
In layman terms, a hypothesis is a rough assumption made according to scant observations. Then test to prove the assumption.
Explanation:
Nvermind i messed u. thats not what i meant to outtb ycgdgc8ydsaox agdydac bc7w
Answer:
same
Explanation:
yes, I agree 100% and you are correct *applaud*
Abigail obtained 40.2 grams of calcium carbonate after performing a reaction. From her calculations, she knew she should have obtained 45.8 grams. What was her percent yield? Round your answer to one place behind the decimal. Do not include the unit.
Answer:
Percent yield = 87.77%
Explanation:
Given:
Actual yield = 40.2 grams
Theoretical yield = 45.8 grams
Find:
Percent yield
Computation:
Percent yield = [Actual yield / Theoretical yield] 100
Percent yield = [40.2 / 45.8] 100
Percent yield = 87.77%
why is air referred to as a mixture of gases
Answer:
Explanation:
air is considered as a mixture of gases because it contains many gases. They are :
78 % Nitrogen
21 % oxygen
And 1 % other gases
This image might help you
Hope this helps
plz mark as brainliest!!!!!!!!!!!
What’s the difference between a chart and a table?
Answer:
Tables and charts are both used to represent data. However, the manner and circumstances in which each is used, distinguishes them from one another. Tables represent facts and figures in a row and column format which makes the data easier and faster to read and compare. On the other hand, charts represent data in a more graphical manner which may include lines, bars and circles.
Explanation:
I Hope This Helps! ^^
Answer:
A pie chart is a graph in which a circle is divided into sectors, each of which represents a percentage of the overall. Its goal is to show percentages at a specific time in history. Pie charts, unlike bar and line graphs, do not illustrate changes over time. Tables sort the data rationally in a row-and-column format, much to spreadsheets. Tables are used to arrange information that is too detailed or complex to be fully described in a text, allowing the reader to see fast results. They can be used to highlight data trends or patterns, as well as to remove numeric data from a document to make it more readable.
Explanation:
:)
Why BF3 acts as a Lewis acid???
Answer:
Explanation:
because it has electron deficiency
Why are forest fires so difficult to extinguish? Make reference to the energetics of combustion reactions.
Answer:Because of the wood
Explanation:Because forests are full of burnable things
Type of reaction for H2SO4
Which of the following choices are types of energy? (Select all that apply) A.kinetic energy B.physical energy C.thermal energy D.chemical energy
Answer:
kinetic, thermal and chemical not physical
The following are types of energy:
Thermal EnergyChemical EnergyKinetic EnergyMeaning of energyEnergy in physics is the ability to do work. Generally it can be said to be the strength, power or ability to do work.
Energy can be contained in a system, can be transformed and can be transfered.
different types of energy are needed in our day to day living.
In conclusion, the types of energy we have are the Thermal Energy, Chemical Energy, and Kinetic Energy etc.
Learn more about Energy : https://brainly.com/question/13881533
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What are two things required for something to be matter?
Explanation:
matter is anything that occupies space and has mass
Matter is anything that has volume and takes up space. True False
Answer:
true
Explanation:
true matter does have volume and takes up space
what do you mean by atom?
Answer:
a very small particale of matter
Explanation: something small in matter called an Atom.
Calculate the volume in liters of a 29.8 g/dL nickel(II) chloride solution that contains 131. G of nickel(II) chloride . Be sure your answer has the correct number of significant digits.
Answer:
0.44 L.
Explanation:
Density of nickel(II) chloride = 29.8 g/dL.
Mass of nickel(II) chloride = 131 g
Volume of nickel(II) chloride =?
Next, we shall convert 29.8 g/dL to g/L. This can be obtained as follow:
Recall:
1 g/dL = 10 g/L
Therefore,
29.8 g/dL = 29.8 x 10 = 298 g/L
Therefore, 29.8 g/dL is equivalent to 298 g/L.
Finally, we shall determine the volume of nickel(II) chloride as follow:
Density of nickel(II) chloride = 298 g/L
Mass of nickel(II) chloride = 131 g
Volume of nickel(II) chloride =?
Density = mass /volume
298 = 131/Volume
Cross multiply
298 x Volume = 131
Divide both side by 298
Volume = 131/298
Volume = 0.44 L
Therefore, the volume of of nickel(II) chloride is 0.44 L
Write in standard notation: 3.2x 103
Answer:
3.2
10×10×10
=1000
so 3.2×1000
=3200
What is produced/made when our food is burned? ____________ + ____________ + __________ *
Answer:
do you have any vocabulary to help you with this or no
Give me a sentence of hypothesis
Answer:a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Explanation: Do you mean definition, because if you do here is the definition of a hypothesis, also it would help if you went into further detail of what the hypothesis is for.
if a gas sample in a balloon occupies 1.5 L at atmospheric pressure, what would be the pressure (in mmHg) if the volume was reduced to 0.8 L?
Answer:
1425 mmHg.
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 1.5 L
Initial pressure (P1) = 1 atm
Final volume (V2) = 0.8 L
Final pressure (P2) =?
Next, we shall determine the final pressure of the gas by using the Boyle's law equation as follow:
P1V1 = P2V2
1 × 1.5 = P2 × 0.8
1.5 = P2 × 0.8
Divide both side by 0.8
P2 = 1.5/0.8
P2 = 1.875 atm
Finally, we shall convert 1.875 atm to mmHg.
This can be obtained as follow:
1 atm = 760 mmHg
Therefore,
1.875 atm = 1.875 × 760 = 1425 mmHg.
Therefore, the new pressure of the gas is 1425 mmHg.