Complete Question
What is the most dense a marble(2.56), quartz (2.64), or diamond (3.52).
Answer:
Diamond with a density of 3.52
Explanation:
When we say an object is dense, this means how heavy a substance or object can be.
Density can be defined as the mass per unit volume of an object of an object or a substance.
In the above question, we were given 3 substances or compounds with their respective densities:
marble(2.56)
quartz (2.64)
diamond (3.52).
We are asked to find the one that is most dense. This means we are to find the one with the highest density.
From amongst the three compounds, the most dense is Diamond with a density of 3.52.
93. Coke is an impure form of carbon that is often used in the
industrial production of metals from their oxides. If a sam.
ple of coke is 95% carbon by mass, determine the mass of
coke needed to react completely with 1.0 ton of copper(II)
oxide.
2CuO(s) + C(s) → 2Cu(s) + CO2(8)
Answer:
Explanation:
in what way do scientists help the government do its work
Answer:
Inventing gadgets to make their work easier.
Protecting the country using bombs and guns.
Explanation:
how many significant figures are in this number? 22.0 grams
Answer:
Hey there!
22.0 has three significant figures.
Let me know if this helps :)
The pressure of a basketball is 412 mmHg. How many kPa is that equal to?
a. 313, 000 kPa
b. 0.117 kPa
c. 0.542 kPa
d. 54.9 kPa
Answer:
d. 54.9 kPa
Explanation:
mmHg and Pa are units of pressure used in chemistry principally in the study of gases. 1mmHg is equal to 133.322Pa. 412mmHg are:
412 mmHg * (133.322Pa / 1mmHg) = 54929 Pa
The prefix K (Kilo) represents one thousand of the determined unit.
54929Pa are:
54929Pa * (1KPa / 1000Pa) = 54.9kPa
Right answer is:
d. 54.9 kPaWhich can lead scientists to change a theory that has already been accepted? Check all that apply. changes to scientific laws new experimental methods new hypotheses technological inventions repetitions of old experiments
Answer:
New experimental methods
Technological inventions
Explanation:
A scientific theory is usually not based on speculation. Scientific theories must have a solid empirical basis.
However, experimental methods are limited to the caliber of equipments available at the time in which a theory is formulated. With advancing years, more technological sophistication leads to the invention of new instruments and ultimately, the development of new experimental methods.
These innovations are likely to alter existing scientific theories as new evidences emerge, hence the answer.
new experimental methods
new hypotheses
technological inventions
A cubic container is filled up with an unknown liquid whose density is 0.180 g/cm3. The side lengh of the container is 5.00cm. Whaf is the mass of this liquid??
Answer:
22.5
Explanation:
M=D*V
V=5*5*5=125
M=0.180*125= 22.5
The mass of the liquid is 22.5 g.
A cubic container has a side length (l) of 5.00 cm. We can find the volume of the cube occupied by the liquid using the following expression.
[tex]V = l^{3} =(5.00cm)^{3} =125 cm^{3}[/tex]
We have 125 cm³ of a liquid with a density of 0.180 g/cm³. The mass of the liquid is:
[tex]125 cm^{3} \times \frac{0.180g}{cm^{3} } = 22.5 g[/tex]
The mass of the liquid is 22.5 g.
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PLZ HELP ME 20 POINTS AND BRAINLEIST What do you suppose would happen if you placed an ice cube in a beater containing pure ethanol (density = 0.789 g(mL) wounldn it sink or float?
Explanation: The Ice Would Sink Toward the Bottom
Density of Ice at 0 Celsius is 0.92 grams per milliliter. Therefore the Ice has a greater density than ethanol, and the ice cube should sink toward the bottom
The gas formed when coal is heated in the absence of air_____________
All of the above
10 points
A gardener wants to know how much fertilizer his roses require to have
lots of blooms. Which group would be the control group*
O The plants without any fertilizer.
2 drops of fertilizer
4 drops of fertilizer
None of the above
This was on my digital worksheet. I need help, I haven’t used Brainly in a while.
Which statement is correct?
A. Block A has the greatest density.
B. Block B had the greatest density.
C. The density of Block A is equal to the density of Block B.
D. The density of Block B is equal to the density of Block C.
Answer:
Block B
Explanation:
the quantity of mass per unit volume of a substance
even though they have all the same volume, block B is more compact hence the weight is more heavier.
What’s 73m equal to in dm
Answer:730
Explanation:
New substances are produced by a(n)
change.
Answer:
New substances are produced by a chemical change
list down two applications of isotopes
Answer:
Give any two application for isotopes
Isotopes of iodine are used for radiotherapy in treatment of hyperthyroidism, cancer, etc.
Uranium, Radium, Polonium isotopes are used in atomic reactors.
Cobalt isotopes are used for irradiation of food products.
✅1) Isotopes of iodine are used for radiotherapy in treatment of hyperthyroidism, cancer, etc.
✅2) Uranium, Radium, Polonium isotopes are used in atomic reactors.
IamSugarBee
Nitrogen can be converted to both biological and chemical ways. Why is nitrification an important process? 1. Bacteria converts ammonia into nitrites and nitrates that plants can use. 2. Fungi convert nitrogen in dead plants into ammonium which converts proteins into ammonia. 3. Nitrogen is converted into a usable form through lightning fixation. 4. Plant enzymes reduce nitrogen compounds into amino acids.
Answer:
it is option A
Explanation: nitrification, is the process by which bacteria in the soil convert ammonia to nitrites and nitrates. Ammonia (NH3) was produced by nitrogen fixation, but plants prefer nitrites and nitrates as a source of nitrogen and oxygen.
hope it helps
define not matter and give examples
Answer:
Everything that has mass and takes up space is matter. Every day, you encounter phenomena that either don't have mass or don't take up space. They are non-matter. Basically, any type of energy or any abstract concept is an example of something that is not matter.
An apple.
A person.
A table.
Air.
Water.
A computer.
Paper.
Iron.
hope this helped you
What is one thing rock, air and water all have in common
Answer: all can be affected by the natural environment ( not sure answer hope it helped)
Explanation:
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, rock, air and water all are matter.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Rock, air and water all are matter.
Therefore, rock, air and water all are matter.
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PREDICT What properties do you think a spoon must have for it to be useful as an eating
Describe the test for iodide ions
Answer:
The test solution is acidified using a few drops of dilute nitric acid, and then a few drops of silver nitrate solution are added. Different coloured silver halide precipitates form, depending on the halide ions present: ... iodide ions give a yellow precipitate of silver iodide.
Which of these would most likely be considered a pure substance?
a. Tap water
b. Red Bull
c. Water vapor
d. The air we breathe
e. A rock from your backyard
Answer:
c. Water Vapour
Hope it helps.
the answer is C- water vapour
0.000000000008
Scientific notation
Answer:
= 0.8
not really sure about the answer I just guessed it
am sorry if it's wrong
what does code zero mean in a science lab
Answer:
either expolshion or hide
Explanation:
so be ware :O
Katherine was given a tiny lamb by her uncle. The lamb was a runt and had to be fed by hand. Every 3 hours
Katherine had to give it 290 milliliters of milk. How much milk, in LITERS, will the lamb get in 24 hours?
Answer:
2.32 liters
Explanation:
you would just divide 24 by 3 which is 8 and multiply 290 by it which is 2320 and divide by 1000 which is 2.32
The quantity of milk that will the lamb give in 24 hours is 2.32 Liter.
What is a Lamb?Lamb may be defined as the youngest form of sheep. In other words, it may be characterized as the little offspring produced by a sheep.
According to the question,
The amount of milk given by lamb in three hours = 290 milliliters.
∴ The amount of milk given by lamb in one hour = 96.66 milliliters.
Now, the amount of milk given by a lamb in 24 hours = 24 × 96.66 = 2320 milliliters.
Now, as per the requirement of the question, convert milliliter into liter.
One liter = 1000 milliliters.
∴2320 milliliters = 2320/1000 = 2.32 liters.
Therefore, the quantity of milk that will the lamb give in 24 hours is 2.32 Liter.
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PLEASE MY TEACHER DIDNT TEACH ME THIS PLEASE
A. group 1.
Hope this helps.
Answer:
[tex]\Large \boxed{\mathrm{\bold{A.} \ Group \ 1}}[/tex]
Explanation:
In covalent bonding, atoms share electrons from their last shell to other atoms to gain stability.
Chlorine has 7 electrons in its last shell, it needs to gain 1 electron to become stable.
Group 1 elements have 1 electron in their last shell, they need to lose 1 electron to become stable.
Group 1 elements can bond with chlorine.
Yosemite Falls, in California, has a total height of 73,000cm. What is the height in meters?
Answer:
Height in meters = 73000 ÷ 100
(1m =100cm)
= 730m
Hope it helps.
Answer:
730m
Explanation:
100cm = 1m
73,000cm = 73000cm/100cm (take 2 zeros away)
= 730m
What is the mass of an rock that has a density of 3.52 g/cc. and when put in a graduated cylinder with 50ml of water makes the level rise to 62ml.
Answer:
m = 42.24 grams
Explanation:
Given that,
The density of the mass of a rock is 3.52 g/cm³.
Initial volume of the graduated cylinder is 50 mL and when rock is put in it the water level makes the level rise to 62 mL.
We need to find the mass of the rock.
Volume of rock = final volume - initial volume
Volume of rock = 62 mL - 50 mL
Volume of rock = 12 mL
1 ml = 1 cm³
So, 12 mL = 12 cm³
Density=mass/volume
[tex]m=d\times V\\\\m=3.52\ g/cm^3\times 12\ cm^3\\\\m=42.24\ g[/tex]
So, the mass of the rock is 42.24 grams.
The mass of the rock is 42.24 g
We'll begin by calculating the the volume of the rock.
Volume of water = 50 mL Volume of water + rock = 62 mL Volume of rock =?Volume of rock = (Volume of water + rock) – (Volume of water)
Volume of rock = 62 – 50
Volume of rock = 12 mL
Finally, we shall determine the mass of the rock.
Volume of rock = 12 mLDensity of rock = 3.52 g/cm³ = 3.52 g/mLMass of rock =?
Mass = Density × Volume
Mass of rock = 3.52 × 12
Mass of rock = 42.24 g
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3.643 x 10^-1 scientific notation
Answer:
its already in scientific form
its ordinary form would be 0.3643 and dragging the decimal point after the first non zero digit and multiplying it with a multiple of 10 we gain scientific form i-e 3.643*10^-1
Explanation:
Potassium atomic number a) 27 b) 67 c) 19
Answer:
C
Explanation:
19 is the answer, because it is the atomic number of potassium. Hope it helps!
How does carbon 14 differ from the typical carbon found on the periodic table?
Answer:
A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons; therefore, it has a mass number of 12 (six protons plus six neutrons). Neutral carbon-14 contains six protons, eight neutrons, and six electrons; its mass number is 14 (six protons plus eight neutrons)
How many significant figures are in 0.0034 cm? a 2 b 3 c 1 d 4
Answer:
A. 2 sig figs
Explanation:
In the number 0.0034, the zeros are called leading zeros. The only function of leading zeros is to fix the decimal point. Leading zeros are not counted as significant figures.
Convert 538.35 to scientific notation.
Answer:
= 5.3835 × 102
Explanation:
Answer:
5.3835x10^2
Explanation:
5.3835x10^2
5.3835x100
538.35
When writing a scientific notation, the two numbers in which the decimal is put must be 1-10.
A decimal can't be put between 0-10.
Hope this helps ;) ❤❤❤