Answer:
Because electron mass is so insignificant compared to proton and neutron mass that it can be ignored.
Explanation:
what is the name for BrCl5
Answer:
Bromine Pentachloride (BrCl5)
Explanation:
The name of the compound BrCl₅ is bromine pentacloride as it has five chlorine atoms.
What is compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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If an object has a mass of 42 kg and a volume of 2m3 what is its density
Answer:
Mass = 42 kg
Volume = 2 m^3
By using formula = Density = Mass/Volume
= 42/2
= 21/1
= 21
= 21 m^3
Rougher surfaces create more friction, so more force is needed to move something over a rougher surface, true or false
Students are studying the effects of beach pollution by counting populations of seagulls at two different beach locations. One location is a beach near a large industrial marina where boats are serviced; the second location is an isolated beach surrounded by a state park. The students plan to count all the visible seagulls at the beaches at specific times of day. They will repeat the bird count for 10 days and then analyze the data.
What is the outcome variable (dependent variable) in this study?
When there are many people seeking the same job, this is known as a _____ of workers.
consumer
demand
projection
surplus
The correct answer would be surplus
kinetic or potential energy.
Answer:
Potential energy is the energy in a body due to its position. While kinetic energy is the energy in a body due to its motion.
A summary of what you have learned from a scientific experiment is called a(n)
a.
hypothesis.
b.
inquiry.
c.
conclusion.
d.
law.
Answer: C
Here is how I used Process of Elimination:
An hypothesis is your guess before you conduct the experiment.
An inquiry is when you ask for information.
A law is a statement based on repeated experiments.
The answer had to be conclusion.
Hope it helps!
it
Find the mistake in the experiment:
Jo read that playing music for plants helps them grow faster. He wanted to test this theory out. He bought 20 plants and kept them in similar
conditions, but in different rooms. One of the rooms was silent. In the other room, he played music continuously, and he also gave the plants
in the music room some fertilizer. He recorded the growth of all the plants for a year, and concluded at the end of the year that the plants that
"listened to music did, in fact, grow taller than the plants growing in silence.
What was Jo's mistake, and how would you design this experiment differently? Answer it at least 3 full sentences.
Answer:
His mistake was that he also gave the plants in the music room some fertilizer
Explanation:
When carrying out a reliable experiment, the only variable should be the question being tested. The question here is whether playing music for plants helps them grow faster. Therefore, all the plants should be grown in exactly the same conditions apart from the presence or absence of music.
However, Jo also added fertilizer to the plants in the room where music was playing. Therefore, we don't know whether the fertilizer or the music caused the plants to grow faster.
Instead, Jo should have not given fertilizer to any of the plants, or given fertilizer to all the plants.
How many mol of lithium are there in 1.204 x 1024 lithium atoms
Answer:
The answer is
2.0 molesExplanation:
To find the number of moles of an element given the number of entities contained in that element , we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.204 × 10²⁴ lithium atoms
We have
[tex]n = \frac{1.204 \times {10}^{24} }{6.02 \times {10}^{23} } \\ [/tex]
We have the final answer as
2 molesHope this helps you
A pure substance with one type of atom is called a(n
Answer:
The correct answer would be Element.
Explanation:
A pure substance can't be broken down into simpler substances by chemical means.
Answer:
An Element
Explanation:
When a substance contains only one type of atom, it is called an element. - (Arizona science center)
I hope that helps ;)
35 POINTS!!PLEASE PUT IN ORDER 1 AND 2
Broad, gradual slopes are___1___ volcanoes, while tall, steep slopes are ___2___
volcanoes.
A. cinder cone
B. shield
C. composite
How are earthquakes and tsunamis created?
Earthquakes are created when tectonic plates rub, push, or pass each other. Tsunamis are made by earthquakes on the sea floor.
What is the percent by mass of sodium in N A2 S O4
Answer:
32.370%
Explanation:
Mina is attending cooking school, where she prepares different mixtures of ingredients. She works with both homogenous and heterogeneous mixtures. Today she is using honey and salsa. What kinds of mixtures are these ingredients?
Answer:
Honey is an homogeneous mixture
Salsa is an heterogeneous mixture
Explanation:
Honey is a sweet uniformly colored liquid that can be of a dark variety or of clear golden color. Honey is made in nature by bees from flower nectar and is used as a food additive or sweetener
Honey is a homogeneous mixture because the concentration of the components of honey are uniformly distributed throughout the mixture. Every portion has the same concentration of components
Salsa is a sauce made by mixing chopped tomatoes, onions, chilies, lime juice and seasoning and therefore consists of both solid and liquid components mixed in varying proportion such that part will have continuous that comes in between different types of solid and no two parts have exactly the same composition
Therefore, salsa is an heterogenous liquid.
Does mixing baking soda and vinegar make a chemical reaction ,why
Answer:
Baking soda and vinegar react chemically because one is a base and the other is an acid. Baking soda is a basic compound called sodium bicarbonate. Vinegar is a diluted solution that contains acetic acid. ... The result of this initial reaction is two new chemicals: carbonic acid and sodium acetate.
describe what the isotopes of an element have in common and how are they different.
Answer:
Isotopes of an element are atoms of the same element that have different number of neutrons.
Please!!!!!! ANSWER QUIIICKKKKK I ONLY HAVE 3 MINS!!!!!!!!!!!!! I WILL AWARD BRAINLIESTTTTTT
What term is used to describe the distance between corresponding points on two adjacent waves? (5 points) a Amplitude b Frequency c Period d Wavelength
Answer:
wavelength!!
Explanation:
because because it is a way of measuring the size of waves. it is the distance between two corresponding points on adjacent waves. the wavelength of a transverse wave can be measured in the distance between two adjacent crests. HOPE THIS HELPS!
In the electromagnetic spectrum , wavelength is the term which is used to describe the distance between corresponding points on two adjacent waves.
What is electromagnetic spectrum?The electromagnetic spectrum consists of electromagnetic radiation consisting of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.There are 7 types of electromagnetic waves in the electromagnetic spectrum.
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Write the chemical symbol and the charge for the ion with 7 protons and 10 electrons.
which has the greater electronegativity N or C?
How many molecules are there in 25.0 grams of water?
Answer:
1.389 mol
Explanation:
[tex]1+1+16=18g/mol.n=mMr=2518=1.389mol.[/tex]
what are the Defence of keeping our body safe from diseases and viruses
Answer:
The immune system
Explanation:
It defends from outside pathogens that may get into the body
In your own words why is science so important
Answer:
i think sience is important cause it helps us understand things i am muslim and i trust my religon amore than seince but also trust sience
.Explanation:
cause it helps me understand and learn things
4. The shallow pits where sea water is
collected for evaporation are called:
(a) ponds
(b) lakes
(c) lagoons
(d) rivers
which are the products in the following reactions
zinc+water➡️zinc+hydrogen
An orbital with n = 4 and ℓ = 2 would be described as
1. 4p.
2. 2p.
3. 2s.
4. 4d.
5. 4s
Answer:
4d
Explanation:
n = 4 and l = 2
shells : S P. D. f
L : 0. 1. 2 3
so when l is 2 it belongs to a D-block elementPlease Help Assap!!!
Which could describe the motion of an object?
distance = 1 meter and displacement = 10 meters
distance = 10 meters and displacement = 100 meters
distance = 0 and displacement = 10 meters
distance = 10 meters and displacement = 10 meters
Answer:
D on edge2020
Explanation:
Distance = 10 meters and displacement = 10 meters. Hence, option D is correct.
What is motion?Motion is defined as the change of position of an object with respect to time.
Distance is known to be a scalar quantity. it shows the rate or ground an object has covered when in motion.
Displacement is known also to be a vector quantity. It shows the rate o how far out of place an object is been. it is known as the object's overall change in position.
Distance is measured in intervals between two locations measured along the actual path connecting them.
Displacement has measured the interval between two locations measured along the shortest path connecting them.
Conclusively, the motion of an object is done by position, speed, direction, and acceleration.
Hence, the right statements which could describe the motion of an object are: distance = 10 meters and displacement = 10 meters
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8. The experimental value of a volume measurement is 65.5mL. The accepted value is 60.0mL. What is the percent
error?
Answer:
The answer is
8.33 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual volume = 60 mL
error = 65 - 60 = 5 mL
The percentage error is
[tex]P(\%) = \frac{5}{60} \times 100 \\ = \frac{1}{12} \times 100 \\ = 8.333333...[/tex]
We have the final answer as
8.33 %Hope this helps you
Which of the following elements is the most
reactive?
a. Be
b. Mg
c. Ca
d. Sr
Sr is the most reactive. Correct me if I'm wrong :/
6. What volume will 9.38g of the mineral quartz (silicon dioxide SiO2)
occupy given that the density if 2.65g/cm?
Answer:
The answer is
3.54 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass = 9.38 g
density = 2.65 g/cm³
The volume of the quartz is
[tex]volume = \frac{9.38}{2.65} \\ = 3.539622641...[/tex]
We have the final answer as
3.54 mLHope this helps you
Of all boron atoms, 19.9%% are boron-10, which have a mass of 10.01294 amu. The other 80.1% of boron atoms are boron-11 and these have a mass of 11.00931. Calculate the average atomic mass of boron.
Answer:
10.81 amu
Explanation:
The average atomic mass of Boron can be calculated as follows :
[tex]A=19.9\%\ \text{of}\ 10.01294 +80.1\%\ \text{of}\ 11.00931\\\\A=\dfrac{19.9}{100}\times 10.01294 +\dfrac{80.1}{100}\times 11.00931\\\\A=10.81\ \text{amu}[/tex]
So, the average atomic mass of boron is 10.81 amu.
