Answer:
each planet has a different force of gravity
Explanation:
Weight = mass× gravity
As gravity changes from place to place and also from planet to planet so weight changes.
A compound is found to contain 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen by weight. To answer the questions, enter the elements in the order presented above. 1. What is the empirical formula for this compound
Answer:
[tex]C_{4}H_{10}O[/tex]
Explanation:
Hello!
In this case, since the empirical formula of compounds whose by-mass compositions are known, is computed by first computing the moles considering those compositions as actual masses:
[tex]n_C=\frac{64.82g}{12.01g/mol}=5.40mol\\\\n_H=\frac{13.62g}{1.01g/mol}=13.5mol\\\\n_O=\frac{21.58g}{16g/mol}=1.35mol[/tex]
Next, we divide each moles by the fewest ones, in this case those of oxygen to obtain the subscript in the empirical formula:
[tex]C=\frac{5.40}{1.35}= 4\\\\H=\frac{13.5}{1.35}=10\\\\O=\frac{1.35}{1.35}=1[/tex]
Thus, we obtain:
[tex]C_{4}H_{10}O[/tex]
Best regards
Calculate the speed,distance,or time with the information given
1. s = 2 m/s
2. d = 130 m
3. t = 7 s
4. d = 56 mi
5. t = 0.15625 h
6. s = 72 mph
Further explanationGiven
The speed,distance,and time
Required
Units that have not been converted / calculated
Solution
For motion at a constant speed, the formula can be used:
d = v x t or d = s x t
v = velocity
s = speed
1. s = d : t = 40 m : 20 s⇒ s = 2 m/s
2. d = s x t = 13 m/s x 10 s ⇒ d = 130 m
3. t = d : s = 63 m : 9 m/s ⇒ t = 7 s
4. d = s x t = 28 mph x 2 h ⇒ d = 56 mi
5. t = d : s = 24 mi : 153.6 mph ⇒ t = 0.15625 h
6. s = d : t =1296 mi : 18 h⇒ s = 72 mph
Throwing a snowball during snowball fight is most like an example of
Suppose a lab procedure calls for 0.75 L of a 0.25 M CaCl2 solution. How much of a 10.0 M stock solution do we dilute?
Where the diluted solution is #2 (the numerator)
Answer:
V₁ = 0.019 L
Explanation:
Given data:
Molarity of stock solution = 10.0 M
Volume of stock solution = ?
Molarity of CaCl₂ = 0.25 M
Volume of CaCl₂ = 0.75 L
Solution:
Formula:
V₁ = M₂V₂ / M₁
V₁ = 0.25 M × 0.75 L / 10.0 M
V₁ = 0.1875 M.L / 10.0 M
V₁ = 0.019 L
Which statement describes how the sun gets its light?
A. It bends light.
B. It reflects light.
C. It refracts light.
D. It makes its own light.
Answer:
D
Explanation:
it's a star it has gas and makes it own light
Explain how balancing
chemical equations with
coefficients conserve the
mass in a reaction.
What would happen to the volume of a gas if you increased the temperature?
Answer:
The volume of the gas increases as the temperature increases.
Explanation:
Gas volume does increase with increasing temperature providing that the pressure remains constant. Temperature and pressure both interact with the gas volume according to the gas Laws and both variables must be accounted for at the same time.
what are all the ways that a substance can change state?
Explanation:
hdhehdbrhdns dhdjdjdhrjs dhfirjr rudjdbe dbdud d
Answer:
Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).
Explanation:
Will the composition of water molecules vary depending on their source?
Answer:
It does not matter where the sample of water came from or how it was prepared. Its composition, like that of every other compound, is fixed.
How are molecules built?
All of these
Phase Changes
Atomic Rays
Bonding
1
Answer:
By bonding due to the attractive forces
HELP HELP HELP HELP
Which of the following elements is malleable and ductile?
A) Cobalt (27)
B) Nitrogen (7)
C) Arsenic (33)
the answer is Nitrogen.
help please thank you
A certain chemical reaction releases of heat for each gram of reactant consumed. How can you calculate what mass of reactant will produce of heat
Answer:
Specific heat capacity formula
Explanation:
The heat capacity gives the exact heat energy at which a given mass of a substance is heated from one temperature to another.
This formula can help determine how much heat is gained or lost during the reaction and is given by:
Q = mcΔT
where:
Q = heat energy in Joules or Calories
m - mass of the substance (g)
c = Specific heat capacity (J/kg°C)
ΔT = change in temperature = (final temp - initial temp) (°C)
I hope this was helpful.
Which equation could be used to solve for the average speed of a car that travels 90m in 20 seconds?
Answer:
Vav=d/t
Explanation:
Because the question already gave d=90m and t=20s. Because the car is the thing that can not travel the same distances at the same times.So the equation is V[tex]\\_{av}[/tex]=[tex]\frac{d}{t} \\[/tex]
Which of these is not a property of minerals?
A) Clevage
B) Fracture
C) Color
D) Smell
Which method would be best for separating the components of a mixture that is made from two different liquids?
O distillation
evaporation
filtration
sorting
Answer:
I think you should use distillation cauze it helps to separate two mixtures
Answer:
A.) distillation
Explanation:
edge 2021
What causes the moon to be illuminated?
A. concave
B. reflection
C. medium
D. refraction
Answer:
Reflection
Explanation:
The light from Earth's surface, reflected back towards the Moon, can illuminate it all the same. This is why, when the Moon is in a crescent phase, you can still see features on the dark portion of the Moon: we call this reflected, illuminating light the phenomenon of Earthshine.
What are the complete Ionic and Net Ionic equations for the following
a) CaCl2(aq) + Pb(NO3)2(aq) → PbCl2(s) + Ca(NO3)2(aq)
b) CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl2(aq)
c) 2AgNO3 (aq) + BaI2(aq) → Ba(NO3)2 (aq) + 2AgI (s)
Answer:
Check photo
Explanation:
What would you use to determine whether an acid or alkali has been added to a solution?
A. Reactant
B. Indicator
C. Adjustor
D. Identifier
Answer:
B. Indicator
Explanation:
An indicator is used to determine whether an acid or alkali has been added to a solution.
An acid or alkali changes the hydrogen ion concentration in solution. This is indicated by the pH of the solution after which the acid or alkali has been added.
To see this change, indicators are used. An indicator employs color changes to show a change in chemical properties which pertains to the pH. There are several indicators used which are litmus paper, phenolphthalein, methyl orangePLS HELP ASAP THIS IS DUE TODAY
Answer: what grade are u in ill help
Explanation:
what are connecting components
Answer:
In graph theory, a component of an undirected graph is an induced subgraph in which any two vertices are connected to each other by paths, and which is connected to no additional vertices in the rest of the graph.
(I will give a brainliest) What must be changed, temperature or heat during condensation?
Answer: Temperature
Explanation:
Answer: Temperature
Explanation: can i get brainliest plss
The temperature of a sample of Rn is changed without changing its volume, causing a change in pressure from 8.6731 atm to 0.5761 atm. If the starting temperature was 187.8 K, what is the final temperature in kelvins?
Answer:
yeye
Explanation:
eq
What is Darwin's name for species that do not appear to have changed for millions of years?
Since, the options have not been given the question is incomplete.
What is Darwin's name for species that do not appear to have changed for millions of years?
a.
Dinosaurs
b.
Living fossils
c.
Old souls
d.
Ancient moderns
Answer: b. Living fossil
Explanation:
In 1859 Charles Darwin proposed the term living fossil, that means a species or group of species that had not changed in terms of evolutionary context thus can be useful in tracing the extinct or previously existing forms of life. The examples of the living fossils are horseshoe crabs, ginkgo (Conifers) and tuatara. These group of animals were existed unchanged in the Ordovician, Permian, and Triassic periods respectively with few surviving species.
Answer:
the answer is living fossils so it would be b
Explanation:
how do i know i took the test
What gases make up Jupiter? Name moons of Jupiter Can Jupiter sustain life How many rings does Jupiter have The weather on Jupiter
Answer: Jupiter is made up predominantly of hydrogen. Jupiter's Moon, Europa, might be able to support life. Jupiter has 3 skinny rings. Usually around -234 degrees Fahrenheit.
please explain energy flow from producer to consumer.
and please explain energy flow from consumer to consumer.
Answer:
1-Ecologists call this one-way flow of matter and energy from a producer to a primary, then to secondary, and perhaps to a tertiary consumer, a food chain. The food web shows all the organisms at each feeding level or trophic level.
2-Energy flows through an ecosystem in one direction: from producer to primary consumer to secondary consumer to higher consumers. A biomass pyramid provides a picture of the feeding and energy relationships within a food web and the direction of the flow of energy.
Answer:
food
Explanation:
The building blocks of DNA are like alphabet letters,
because they:
А: Are each associated with a particular sound
B: Can be used in a variety of languages
C: Each have an uppercase and a lowercase form
D: Spell out different instructions depending on their order
Help please
3. What do you notice about the temperature of the substance in the test tube after it is placed in the beaker of water?
A)The temperature of the substance remains the same as it sits in the beaker of water.
B) The temperature of the substance decreases as it sits in the beaker of water.
C) The temperature of the substance increases as it sits in the beaker of water.
Answer:
C: The temperature of the substance increases as it sits in the beaker of water
Explanation:
This question was taken from a video where an attempt was made to investigate the changes in temperature when a substance undergoes change from it's solid phase to its liquid phase.
To do this, as seen in the video online, it shows a solid substance in a test tube being placed in a beaker of water.
From observation, the water in the beaker has a warmer temperature than the solid substance present in the test tube and this in turn makes the test tube gradually increase in temperature.
Thus, the solid substance will as well increase increase in temperature when it is placed in the beaker of water.
Which word describes the amount of matter an object contains?
altitude
density
mass
pressure
Answer:
Mass
Explanation:
Answered this question multiple times and got it correct
Hope this helped!
Stay safe!
Suppose that you take a sample of 500 g of ocean water and let the water evaporate. The mass of the remaining salts is 17 g. What was the salinity of the ocean water
Answer: The salinity of ocean water is 34 ppt.
Explanation:
Salinity is defined as the number of grams of salts present per kilogram of seawater. It is expressed in parts per thousand.
The formula used to calculate the salinity of ocean water or sea water is:
[tex]\text{ Parts per thousand}=\frac{\text{Mass of salts}}{\text{Mass of sea water}}\times 1000[/tex]
We are given:
Mass of salts = 17 g
Mass of sea water = 500 g
Putting values in above equation, we get:
[tex]\text{ Parts per thousand}=\frac{17g}{500g}\times 1000\\\\\text{ Parts per thousand}=34[/tex]
Hence, the salinity of ocean water is 34 ppt.
