Answer:
The heat generated per gram of sample in calories is 0.87 g
Explanation:
Given that,
A calorimeter made from a can is used to measure the calories in a peanut.
During the experiment, the measured calories were 35% of the true/accepted value given by references
Suppose, the mass of peanut is 0.4 g and find the
We need to calculate the heat generated per gram of sample in calories
Using formula of heat generated
[tex]q=\dfrac{q_{penut\ calorimeter}}{m_{peanut}}[/tex]
Put the value into the formula
[tex]q=\dfrac{0.35}{0.4}[/tex]
[tex]q=0.87\ g[/tex]
Hence, The heat generated per gram of sample in calories is 0.87 g
Is the copper in a copper wire a homogeneous or heterogeneous mixture
A scientist grew bacteria on gel in her lab.
She wanted to find out if bacteria would grow faster on gel A or gel B.
she placed a few bacteria on gel A and a few on gel B.
After 24 hours, she observed how many bacteria were present.
Identify the independent and dependent variables.
Answer:
The independent variable is type of gel and the dependent variable is the number of bacteria.
Explanation:
An experiment generally tests how one variable is affected by another. The affected variable is called the dependent variable. In the plant experiment shown above, the dependent variable is plant growth. The variable that affects the dependent variable is called the independent variable. In the plant experiment, the independent variable could be fertilizer—some plants will get fertilizer, others will not. The scientists change the amount of the independent variable (the fertilizer) to observe the effects on the dependent variable (plant growth). An experiment needs to be run simultaneously in which no fertilizer is given to the plant. This would be known as a control experiment. In any experiment, other factors that might affect the dependent variable must be controlled. In the plant experiment, what factors do you think should be controlled? (Hint: What other factors might affect plant growth?)
All elements on the periodic table of elements are
First 30
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminum
Silicon
Phosphorus
Sulfur
Chlorine
Argon
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
75
Answer:
The rest after that first 30.
Explanation:
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
Rubidium
Strontium
Yttrium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
Cesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Polonium
Astatine
Radon
Francium
Radium
Actinium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Lawrencium
Rutherfordium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium
Roentgenium
Copernicium
Nihonium
Flerovium
Moscovium
Livermorium
Tennessine
Oganesson
plz tell me I will also give brainiest. forces can be ________ or unbalanced
Answer:
balanced
Explanation:
hope this helps
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{ \: Balanced}}}}}[/tex]
Explanation:
Forces can be balanced or unbalanced.
[tex] \bigstar {\sf{ \: \: Balanced \: force}}[/tex]
When a number of forces acting on a body do not change its state of rest or uniform motion in a straight line , the forces are said to be balanced forces. For example : In the game of tug of war, two teams pull a rope in opposite directions. When the two teams exert equal and opposite forces on the rope, the rope remains steady and does not move in any direction. It appears as if no force is acting on the rope. Thus, the two forces acting on the rope in this case are balanced forces.
[tex] \bigstar{ \sf{ \: Unbalanced \: force}}[/tex]
When a number of forces acting on a body change it's state of rest or uniform motion in a straight line, the forces are said to be unbalanced forces. For example, if we push a toy car towards east, it moves towards east. If it is pushed towards west, it moves towards west. This unbalanced force produces motion.
Hope I helped!
Best regards! :D
~TheAnimeGirl
Who discovered the flame test
Answer:
Thomas Melvill
Explanation:
...
What do you think of the word matter?
Answer:
matter is any substance that has mass and takes up space by having volume. ...
As the frequency of electromagnetic waves increases, what happens to the wavelength?
O It increases.
O It decreases
It fluctuates.
O It remains constant.
Answer:
It decreases.
Explanation:
As the frequency of electromagnetic waves increases, the wavelength decreases.
What is frequency?Frequency defines the number of waves passing through a fixed area over a period of time. So if the time we take for the wave to pass is 1/2 second, it is usually 2 per second. If it takes 1/100 of an hour, it is usually 100 per hour.
What is an example of frequency?The definition of frequency is how often something happens. An example of blinking an eye blink 47 times in one minute. (physics) The degree to which a recurring event occurs, such as a full-wave cycle.
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What most likely occurred during this demonstration?
In a science demonstration, a teacher mixed zinc (Zn)
with hydrogen chloride (HCI) in a flask and quickly
attached a balloon over the mouth of the flask Bubbles
formed in the solution and the balloon inflated,
O The Zn and HCl both retained their identity
Either Zn or HCI, but not both, retained its identity
O Evaporation of one of the substances occurred
One or more new substances formed
Answer:
Hydrogen gas and a salt formed at the end of the reaction.
Explanation:
Hydrogen Gas has formed which inflated the balloon
Usually, metals and acids react to form a salt and Hydrogen Gas.
Here's what happened:
Zn (s) + 2HCl (aq) → [tex]ZnCl_2[/tex](aq) +[tex]H_2[/tex](g)
Cheers :)
Answer:
One or more new substances formed.
Explanation:
This is an example of a chemical property because bubbles formed, and the mixture produced a gas which allowed the balloon to inflate. The production of bubbles is an indicator of a chemical change. When a chemical change occurs, one or more new substances form as a result.
- I took the quiz and got 100%
Hope this helps!
A researcher is measuring changes in the density of the upper atmosphere over time. Which units should be used for the density measurements?
Answer:
lbm/ft³ or psi/ft
Explanation:
The description in the question shows the density to measured is that of gases (upper atmosphere). The density of a gas can be described as the mass of the gas divided by the volume of the gas at a certain temperature and pressure. It's unit can be represented as lbm/ft³ or psi/ft.
NOTE:
"lbm" means "lean body mass" which is a unit for mass or weight and can be described as the pound mass
"psi" means "pound per square inch"; is also a unit for mass or weight
which statement best describes what happens when you hold a cold drink in your hand?
Answer:
heat will flow from your hand (the warmer object) to the cup (the colder object), and your hands will start to feel cold because their losing heat energy
Based on what you observed, what ideas do you
have about the missing piece? What can you
visualize about the missing piece?
given: f(x) 3x-1. g(x) 2x^2-3
=(3x-1) + (2x^2-3)
= 3x-1 + 2x^2-3
=5x^2-4
can someone tell me if its correct, im not sure if i am ;-;
f(x) = 3x - 1 = 0
f(x) = x = 1/3
By putting the value of x in g(x), we get
g(x) = 2(1/3)^2 - 3
g(x) = 2(1/9) - 3
g(x) = 2/9 - 3
g(x) = -25/9
Answer:g(x) = -25/9
Answer:
[tex]2x^{2} + 3x - 4[/tex]
Explanation:
(f + g)(x)=(3x-1)+(2x^2-3)
Simplify:
2x^2+3x−4
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.
How is crystallization used in the pharmaceutical industry (simple answer please)
Answer:
CRYSTALLIZATION :IMPORTANT IN THE PHARMACEUTICAL INDUSTRY.IT IS A SEPARATION PROCESS FOR INTERMEDIATE AND A FINAL STEP IN PHARMACEUTICAL INGREDIENTS.A BRAINLIEST PLEEAAAASEWhat is the difference between magma and lava?
Help PLZ!!!!!!
A Magma is molten rock within the earth; lava is molten rock on the earth's surface.
B Magma is cool, lava is very hot.
Magma is very hot, lava is cool,
Magma is molten rock on the earth's surface; lava is molten rock within the earth.
Answer:
the answer is A. Magma is molten rock within the earth; Lava is molten rock on the earth's surface
Answer:
A Magma is molten rock within the earth
Explanaton:
What is the mass of a
12.31 cm3 piece of
copper having a density of
8.96 g/cm3
Answer:
110.30 grams
You have to multiply by 8.96.
12.31 x 8.96 = 110.30 grams.
Therefore, that is your answer.
(Sorry I had to answer twice it was because of LukeG1).
How do I convert 3.221×10^−3 mm to standard notation
Answer:
0.003221
Explanation:
When we multiply anything by 10 times a power, we follow the base 10 decimal system.
To convert 3.221 × 10⁻³ from scientific notation to standard notation, simply move the decimal place 3 places to the left:
3.221 × 10⁻³ = 0.003221
A heterogeneous mixture is
Answer:
simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent parts
Explanation:
i think it may wrong
Which is one source from which metamorphic rocks form?
soil particles
igneous rock
molten material
sand particles
Answer:
Option B:igneous rock
Explanation:
Metamorphic rocks are formed as a result of heat and pressure transforming the original or parent rock completely into a new rock. Now this original or parent rock can either be sedimentary, igneous, or another metamorphic rock.
Thus, looking at the options, the only source of metamorphic rocks is from igneous rocks.
Answer:
B
Explanation:
Took the test
A car drives with constant speed of 112km/h. How long will it take to travel to distance of 56 kilometers?
112 km is travelled by car in 60 minutes
1 km is travelled by car in 60/112 minutes
56 km is travelled by car in 60/112*56 = 30 minutes = 0.5 hours
Explanation:
which of the following is the correct equation for photosynthesis
Answer:
6CO2 + 6H20 + ENERGY = C6H12O6 + 6O2
Explanation:
Carbon dioxide + water + energy from light produces glucose and oxygen
The number of protons in an atom is also known as the atomic what?
Which statement describes a chemical property that many elements might share?
A. bonds easily with oxygen in the air
B. boils between 90°C and 100°C
C. shines when polished
D. floats in water
ANSWER:
I think its B.
A loaf of bread has a mass of 0.5kg and a volume of 2500cm³. what is the density of the bread
Density is mass divided by volume.
Since mas is 0.5kg we need to convert it to grams. Using conversion factors we get the mass of the bread to be 500g.
So densty=500/2500
density =1/5 grams per cubic centimeter
:)
PLZ ANSWER WILL GIVE BRAINEST Based on the information in the table, which elements are most likely in the same periods of the periodic table?
-Boron and carbon are likely together in one period because they have very close atomic numbers, while gallium and germanium are likely together in another period because they have very close atomic numbers.
-Aluminum, boron, and carbon are likely together in one period because they were first isolated in the first half of the 1800s, while gallium and germanium are likely together in another period because they were first isolated in the second half.
-Boron and carbon are likely together in one period because they each end in “-on,” while aluminum, gallium, and germanium are likely together in another period because they each end in “-ium.”
-Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.
Answer:
Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.
Explanation:
Answer: The correct answer is
Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.
This is the only one that makes sense after reviewing the data. Hopefully this helps! Feel free to mark as brainliest!
PLEASEEE ANSWERRR FASTT
Number 5 is metal & number 6 is nonmetals
Explanation:
is pepperoni pizza an element, compound,
heterogeneous mixture, or homogeneous mixture?
Pepperoni pizza is a heterogeneous mixture. Therefore, option C is correct.
A heterogeneous mixture is a type of mixture that consists of visibly different substances or phases that are not uniformly distributed. In a heterogeneous mixture, the different components can be easily distinguished and separated. The composition and properties of the mixture can vary at different locations within the mixture.
In a heterogeneous mixture, the substances do not blend together at the molecular level, unlike in a homogeneous mixture where the components are uniformly distributed.
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Concrete is made of an uneven mixture of gravel, sand, and water. It is _____. homogenous heterogeneous a solution a solute
heterogeneous, because it does not have a uniform texture
hope That helps
Answer:
Heterogenous, I just took the quiz
Explanation:
An atomic number stands for the number of _____. neutrons in the nucleus of an atom protons in the nucleus of an atom valence electrons in an atom protons plus neutrons in the nucleus of an atom
Answer:
atoms or electrons
Explanation:
but l guess electrons is the best answer
What do you think happens to the matter in a food sample as it is burned?
Burning and other changes in matter do not destroy matter. The mass of matter is always the same before and after the changes occur. The law of conservation of mass states that matter cannot be created or destroyed
The thing that is happen in a food sample as it is burned is the chemical and physical change.
What is combustion reaction?Comubustion reactions are those reactions in which organic compound get burnt in the presence of oxygen for the formation of carbon dioxide gas and water molecule.
If the food sample contains the organic compound then it will convert into water and carbon dioxide gas and if it contains the matter in the form of inorganic compounds then it will convert into another product but having the same mass.
Hence if matter of food sample is burned then it will convert into small products as a result of physical or chemical change.
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