Answer:
Bromine test is used to test the unsaturation of hydrocarbons.
Explanation:
If a 2,000-kilogram car accelerates at a rate of 3 meters per second squared,
what is the force the engine applied to the car?
HELP
Answer:
Explanation:
assuming there is no friction
fnet=ma
2,000 kg*3m/s=6,000 N
select three of the following compounds that are ionic
Explanation:
Ionic compounds are compounds formed by the bonding of a metal with a non metal.
A. NO2
This is not an ionic compound because N and O are non metals.
B. CaCl2
This is an ionic compound because Ca is a metal and Cl is a non metal.
C. KI
This is an ionic compound because K is a metal and I is a non metal.
D. CO2
This is not an ionic compound because C and O are non metals.
E. H2O
This is not an ionic compound because H and O are non metals.
F. NaCl
This is an ionic compound because Na is a metal and Cl is a non metal.
Explain how mass extinctions occur.
Answer:
Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes.
Explanation:
Is the process represented below an example of a physical or a chemical
change?
CO2(s) —» CO2(g)
Determine el número de moles presentes en una esfera de titaniode 0.5 cm de radio, sabiendo que la densidad del titanio es de 4507kg/m³. =433
Answer:
0.0493 moles de Titanio
Explanation:
Primero, debemos hallar el volumen de la esfera. Usando la densidad podemos hallar la masa de titanio y usando la masa atómica encontraremos las moles de titanio:
Volumen de la esfera:
Volumen esfera = 4/3π * Radio³
Volumen = 0.5236cm³
En m³ (1m³ = 1x10⁶cm³):
0.5236cm³ * (1m³ / 1x10⁶cm³) = 5.36x10⁻⁷m³
Masa en gramos:
5.36x10⁻⁷m³ * (4507kg / m³) = 2.36x10⁻³kg * (1000g / 1kg) = 2.36g de Titanio
Moles -Masa molar Ti: 47.867g/mol-:
2.36g de Titanio * (1mol / 47.867g) =
0.0493 moles de TitanioWhich of the following correctly describes the difference (on average) between an electron in a 2s orbital and an electron in a 3s orbital?
Answer:
C: electrons is the 3s orbital are higher than those in the 2s orbital
Explanation:
Looking at the options, the correct one is that the electrons in the 3s orbital will possess more energy than those in the 2s orbital. This is because the the 2s orbitals will be filled with electrons first before the 3s orbital.
Also from basics we know that the energy of an orbital increases as the quantum number increases.
Jay painted the inner four walls of a box. Then he put an ice block into it such that it did not touch the walls, but he couldn't do the same when he put water in that box. Why?
Answer:
Liquid takes the shape of container, so it will always touch the walls of the box in which you put it.
Explanation:
We know that a solid has a definite shape and a definite volume hence it occupies only its own volume in the box, it does not touch the walls of the box.
However, a liquid does not have a definite shape and volume. It occupies the volume of the box. Therefore, the liquid water must definitely touch the walls of the box.
Which of the activities below does NOT affect the water cycle
Hydroelectricity
Deforestation
Exercising
Greenhouse effect
Answer:
Exercising would not affect the water cycle.
a = 10 m/s - 5 m/s
5S
Answer:
what is the formula?
Explanation:
When white light passes through a prism, what can be discovered?
A)
White light is made invisible by passing through prisms.
B)
White light is made brighter by passing through prisms.
White light is made of a spectrum of various colors.
D)
White light gets hotter when it passes through prisms.
Answer:
White light is made of a spectrum of various colors.
Explanation:
As light passes through a prism, it is bent, or refracted, by the angles and plane faces of the prism and each wavelength of light is refracted by a slightly different amount. ... As a result, all of the colors in the white light of the sun separate into the individual bands of color characteristic of a rainbow.
Help please I have 10 min.
HELP ASAP!!!
Which of the following is a function of the cell membrane?
Producing energy
Creating new cells
Eliminating of waste
Replacing damaged cells
6.
A crystal of the purple compound potassium manganate (VII) is placed at the bottom
of a beaker of water and the beaker left until there
is no further change. What will be
observed?
A a uniformly purple solution.
B
a purple layer below a colourless layer.
С a colourless layer below a purple layer.
D a deep purple layer below a pale purple layer.
Sec 3/KPT and SMS/2021
Page 2 of 3
Answer:
I don't know
Explanation:
sorry i just need point to ask so i have comment
PLEASE HELP ME!! ILL GIVE BRAINLIEST PLEASE HELP IMMEDIATELY
Which of the following is the most accurate description of chemical energy? A. The energy released by heat in a chemical reaction B. The energy in the motion of the substance C. The energy stored in the chemical bonds of a substance D. The energy that is absorbed in a chemical reaction
Answer:
The answer is A The energy released by heat in a chemical reaction
Explanation:
2. How much force, in g cm / s2 , is exerted by a golf ball described in problem 1 striking a tree while accelerating at 20 cm / s2 ? Show how you can solve this problem without knowing that F = m a. Explain your solution.
Answer:
F = 1000 g cm/s²
Explanation:
Let the weight of 1 ball is 50 gram
Acceleration, a = 20 cm/s²
We need to find the force exerted by a golf ball. We know that,
F = ma
So,
F = 50 g × 20 cm/s²
F = 1000 g cm/s²
So, the required force is 1000 g cm/s².
What Classification type star this?
Explanation:
The Sun is a as a G2V type star, a yellow dwarf and a main sequence star. Stars are classified by their spectra (the elements that they absorb) and their temperature.
whish this helped!
What are the end products of anaerobic respiration in yeast cell ?
Answer:
glucose ethanol and co2
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Answer:
In anaerobic respiration yeast breaks down glucose, forming ethanol and carbon dioxide as its waste products. When the glucose is nearly used up, and provided that oxygen is present, yeast uses the ethanol as a respiratory substrate to produce carbon dioxide and water in aerobic respiration.
Explanation:
Hope it is helpful....
If an object has a Mass of 11g and a volume fo 13mil, what is its density?
A.143g/ml
B.0.85g/ml
C.2g/ml D.24g/ml
Answer:
[tex]\boxed {\boxed {\sf B. \ d \approx 0.85 \ g/mL}}[/tex]
Explanation:
Density is found by dividing the mass by the volume.
[tex]d=\frac{m}{v}[/tex]
The mass of the object is 11 grams and the volume is 13 milliliters.
[tex]m= 11 \ g \\v= 13 \ mL[/tex]
Substitute the values into the formula.
[tex]d= \frac{11 \ g}{13 \ mL}[/tex]
Divide.
[tex]d=0.846153846 \ g/mL[/tex]
Round to the nearest hundredth. The 6 in the thousandth place tells us to round the 4 to a 5.
[tex]d \approx 0.85 \ g/mL[/tex]
The density is about 0.85 grams per milliliter.
Which characteristic of living organisms is described by the following definition? "The ability
to detect changes in the environment and make responses".
1. nutrition
2. sensitivity
3.movement
excretions
Answer:
it's sensitivity
Explanation:
because it's the action of sensing and reacting to something
also it was process of elimination
Why have rainforest plants adapted to be a different shape and size than desert plants?
A
because rainforest plants are only raised in zoos
B
because in a rainforest environment, adaptation can happen overnight
с
because rainforest plants and desert plants need to store the same amount of
water
because the rainforest environment is different than the desert environment
Answer:
option D is correct answer of this question
option D is correct answer of this questionbecause the rainforest environment is different than the desert environment
option D is correct answer of this questionbecause the rainforest environment is different than the desert environment hope it will help
The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.
Adaption of the rainforest plants to the different shapes and size?
It can be like:
Drip tips - where plants contains leaves with pointy tips.Buttress roots - These contain large roots that have ridges that develop a large surface area. Epiphytes - It lives on the branches of trees high up in the canopy.hence, The reason of why rainforest plants adapted to be a different shape as compared to the desert plants is because of option d. as the rainforest environment is different than the desert environment.
learn more about rainforest plants here: https://brainly.com/question/2170925?referrer=searchResults
Do you believe humans are responsible for global warming or do you believe this is part of a natural cycle of Earth, like periodic ice ages?
Answer:
If I had to choose I think it would be humans fault.
Explanation:
To think that we are the reason for global warming and everything would make the next person a little insulted but when you think about it a long time ago when there was not many technological advancements there was not complains of global warming or anything until recently. Temperatures are starting to rise and more and more pollution is filling our atmosphere. As it could be true that it might not be entirely our fault as humans I think we took a major part in it.
Hope this helps :)
help asap select three of the following compounds that are ionic
Answer:
d, e and a
Explanation:
I hope you get it right
PLS HELPPP ASAP
According to the Periodic Table of Elements, the neutral atom of what element has 4
protons, 5 neutrons, and 4 electrons?
O A. beryllium
O B. boron
OC. fluorine
D. aluminum
For the reaction
? P4+? S8 - ? P4S10
what is the maximum amount of P4S10 which
could be formed from 15.29 g of P4 and 17.66 g
of Sg?
Answer in units of g.
Please hurry it’s due today and include the steps if you can
Balance the following equation..
Answer:
CH4+4Cl2=CCl4+4HCI
Explanation:
It's been a while since i've done one of these, but I believe this is right. Hope this helps!
X
What period are
the elements
that have an
outer layer O in?
Answer:
carbon
Explanation:
second (n = 2) shell, more specifically its 2s and 2p subshells.
In a 63.17 g sample of SOs, how many grams are sulfur?
Answer:
25.30 gram
Explanation:
No of moles = given mass / molar mass
No of moles = 63.17/80.06
0.7890 moles
Mass of sulphar = no of moles× molar mass of sulphar
Mass of sulphur = 0.7890×32.065
25.30 gram
If 11.87 grams of sand (SiO2) were contained in the mixture, how many atoms of oxygen were in the mixture?
Answer:
2.38x10²³ atoms oxygen
Explanation:
To solve this question we need to convert the mass of sand to moles using its molar mass (Molar mass SiO₂ = 60.08g/mol). Twice these moles are the moles of Oxygen and using Avogadro's number we can find the amount of atoms of Oxygen in the mixture:
Moles SiO₂:
11.87g * (1mol / 60.08g) = 0.1976moles SiO₂
Moles Oxygen:
0.1976moles SiO₂* 2 = 0.3951moles oxygen
Atoms oxygen:
0.3951moles oxygen * (6.022x10²³atoms / 1mol O₂) =
2.38x10²³ atoms oxygenHow can scientists control the flammability of a substance?
Answer: This is simple, if it has a high flammability, and you light it on fire, then that would be a chemical change.
Explanation:
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