Answers
Answer:
CCI2
Explanation:
Related Questions
How do scientists write very large numbers?
O A. They divide all numbers by a constant to reduce the size.
O B. They round off all numbers to a few digits after the decimal.
O c. They simplify the numbers by deleting the exponents.
D. They express the numbers using scientific notation.
SUBMIT
Answers
Answer: its D
Explanation: i just got the question right
In scientific notation, often known as power-of-10 notation, extremely big and small numbers are written. Scientists write very large numbers by express the numbers using scientific notation.
What is scientific notation ?Numbers that are either too large or too little to be readily stated in decimal form can be expressed using scientific notation. It is also known as standard form in the UK and scientific form, standard index form, and standard form.
The main goal of scientific notation is to simplify computations using numbers that are abnormally big or tiny. The following examples demonstrate how all the digits in a number in scientific notation are relevant, since zeros are no longer utilized to set the decimal point.
When working with very big or very small numbers, scientists, mathematicians, and engineers employ scientific notation. Large and tiny numbers can be represented in a form that is simpler to read using exponential notation.
Thus, option D is correct.
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What’s the difference between a learned behavior in an inherited behavior? Give one example of each
Answers
Answer:
short answers:
A learned behavior is a behavior that develops during an animal’s lifetime.
Examples of learned behaviors include tying one’s shoes or solving a math problem.
An inherited behavior is a behavior that an animal is born with.
An example of an inherited behavior is a bird building a nest.
Explanation:
Learned behaviors are those which are gradually developing in us through learning at different ages and it takes time. Inherited behaviour is innate to us which are incorporated with us by birth.
What is learned behaviour?An organism develops a learned behavior as a result of experience. In contrast to learned actions, inherent behaviors are genetically preprogrammed and can be carried out without any prior knowledge or instruction.
Certain behaviors have features that are both acquired and innate. Zebra finches, for instance, have a genetic predisposition to learn a song, but the song they sing is influenced by what they hear from their dads.
Inherited behaviors are inherited from parents to their offsprings. Such as similar nature in sound, angriness, some diseases etc. They are not gathered from any experience and are accompanied by birth.
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The OH-ion concentration of a blood sample is
2.5 x 10-7M. What is the pH of the blood?
a. 6.60
b.0.99
c.740
d.1
Answers
Answer:
She okeyy
Explanation:
Example 740 are the think free ofıce pH of the blood 740 blood sample iş takipte kal ❣️
What type of chemical reaction has only one product?
Answers
Answer:
synthesis reactions
Explanation:
Just as synthesis reactions can only form one product, decomposition reactions can only start with one reactant
Which image shows a foliated metamorphic rock?
light colored rock with fine grains and metallic luster.
Smooth green rock.
dark color rock with coarse grains in parallel layers.
Answers
Answer:
C
Explanation:
The answer is in the image.
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Walk in faith and trust in God!
In guinea pigs, the allele for a black coat is dominant over the allele for a white coat. What color is a guinea pig with one allele for a black coat and one allele for a white coat?
A.
black
B.
gray
C.
white
D.
black and white
Answers
how many electrons are in krypton
Answers
Answer: 36
Explanation:
· For the reaction Cl2 + 2KBr → 2KCI + Brz, how many moles of potassium chloride are produced from 119 g of potassium bromide?
Answers
Answer: l
2
+
2
K
B
r
→
2
K
C
l
+
B
r
2
Given:
300
g
of
C
l
2
300
g
of
K
B
r
(a) Mass of
C
l
2
= 300g
Molecular mass of
C
l
2
= 2(35.45) = 70.906 g
/
m
o
l
No.of moles of
C
l
2
=
m
a
s
s
/
m
o
l
a
r
m
a
s
s
=
300
/
70.906
=
4.23
moles
Mass of
K
B
r
=
300
g
Molar mass of
K
B
r
=
39
+
79.9
=
118.9
g
/
m
o
l
No.of moles of
K
B
r
=
300
/
118.9
=
2.52
moles
Now,
Consider the equation:
C
l
2
+
2
K
B
r
→
2
K
C
l
+
B
r
2
1
mole of
C
l
2
= 2 moles of
K
C
l
4.23
moles of
C
l
2
= 2x4.23=
8.46
moles
2
moles of
K
B
r
= 2 moles of
K
C
l
2.52
moles of
K
B
r
=
2.52
moles
Now convert moles to mass,
Mass of
K
C
l
produced by
C
l
2
=
8.46
×
70.906
=
599.8
g
Mass of
K
C
l
produced by potassium bromide =
2.52
×
74.5
=
187.74
g
As
K
B
r
is producing lesser moles of product so,
K
B
r
is limiting reactant and produced potassium chloride=
187
Explanation:
Taking into account the reaction stoichiometry, 1 mol of KCl is formed from 119 grams of KBr.
Reaction stoichiometryIn first place, the balanced reaction is:
Cl₂ + 2 KBr → 2 KCI + Br₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Cl₂: 1 mole KBr: 2 molesKCI: 2 molesBr₂: 1 moleThe molar mass of the compounds is:
Cl₂: 70.9 g/moleKBr: 119 g/moleKCI: 74.55 g/moleBr₂: 159.8 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Cl₂: 1 mole ×70.9 g/mole= 70.9 gramsKBr: 2 moles ×119 g/mole= 238 gramsKCI: 2 moles ×74.55 g/mole= 149.1 gramsBr₂: 1 mole ×159.8 g/mole= 159.8 gramsMoles of potassium chloride producedThe following rule of three can be applied: if by reaction stoichiometry 238 grams of KBr form 2 moles of KCl, 119 grams of KBr form how many moles of KCl?
[tex]moles of KCl=\frac{119 grams of KBrx2 moles of KCl}{238 grams of KBr}[/tex]
moles of KCl= 1 mole
Then, 1 mol of KCl is formed from 119 grams of KBr.
Learn more about the reaction stoichiometry:
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Which types of changes must follow the law of conservation of mass? (2 points)
O Both physical and chemical changes
O Neither physical nor chemical changes
O Only physical changes
O Only chemical change
Answers
Name two elements whose outer energy levels are complete with two electrons
Answers
Answer:
ppsuck
Explanation:
f;lhfadlkahglkaga
how long did it take for a car to travel 20 meters with a speed of 10m/s
Answers
Answer:
2 second
Explanation:
yes
Read the sentence.
The same amount of matter exists before and after the change — none is created or destroyed.
How does this sentence contribute to the article's main idea?
A
It defines what is meant by the phrase "chemically the same."
B
It defines the concept of conservation of matter.
C
It explains why changing matter is important.
D
It explains that atoms have been around for a long time.
Answers
Answer:
B
It defines the concept of conservation of matter.
Explanation:
Which of the statements are true ONLY for lonic compounds? (select all that apply)
Smallest unit is called a formula unit
Bonding determined by valence electrons and the octet rule
Compounds are electrically neutral (no charge) overall
Forms between a metal and a nonmetal
Compounds have relatively weak bonds
Creates geometrical shapes that minimize electron pair repulsion (VSPER model)
Forms between two non-metals
Formed by the transfer of electrons
Good conductor when dissolved in water
Formed when atoms share valence electrons
Smallest unit is a molecule
Forms repeating patterns in a crystal lattice structure
Have high melting and boiling points
Answers
Answer:
Smallest unit is called a formula unit
Forms between a metal and a nonmetal
Formed by the transfer of electrons
Good conductor when dissolved in water
Forms repeating patterns in a crystal lattice structure
Have high melting and boiling points
Explanation:
What happens when a wave hits an object?
the wave is reflected
the wave continues on
the wave is interfered with
the wave stops
Answers
Answer:
the wave is reflected. it starts heading towards the other direction
Explanation:
lonic Bonding
Why did it require two sodium atoms to Complete
the Na 0 formula unit?
Na has +2 charge and O has -1 charge.
Na has +1 charge and O has -2 charge
Na has -2 charge and O has +1 charge.
Answers
Write the complete and net ionic equation for the following reaction:
Al2(SO4)3(aq) + Mg(OH)2(aq) → MgSO4(aq) + Al(OH)3(s)
Answers
Answer:
Al2(SO4)3 + 3Mg(OH)2 → 2Al(OH)3 + 3MgSO4
Explanation:
You are on a road trip to San Francisco. You drove 200 miles in 3 hours, and then stopped for lunch for
30 minutes. After lunch, you traveled 150 miles in an hour and a half. What was your average speed
for this trip? SHOW YOUR WORK!
a. Calculate the average speed including the time spent for lunch.
b. Calculate the average speed without the lunch stop
Answers
Answer:
Explanation:
a)
Average speed is total distance over change in time.
So
total distance=(200+150)
=350
total time=(3+0.5+1.5)
=5
350 km/5 hours
70km/hour
Therefore:
70 km/h is the average speed
b)
total distance=(200+150)
=350
total time=(3+1.5)
=4.5
350/4.5
=approx. 77.77 km/hour
Therefore:
77.77/hour is the average speed
Don't know if you round but uh yeah
How many grams of solid lithium hydroxide must be used to prepare 450
mL of 0.55M LiOH solution?
Answers
Answer:
Mass = 6.706 g
Explanation:
Given data:
Mass of lithium hydroxide = ?
Volume of lithium hydroxide = 450 mL (450/1000 = 0.450 L)
Molarity of lithium hydroxide = 0.55 M
Solution:
Formula:
Molarity = number of moles / volume in L
0.55 M = number of moles / 0.450 L
Number of moles = 0.55 M × 0.450 L
Number of moles = 0.25 mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 0.25 mol × 23.95 g/mol
Mass = 6.706 g
whoever answers this first gets brainly
Answers
Answer:
D. lysosome
Explanation:
hope it helps :D
sorry if its wrong :/
the first plants to grow after a fire are called?
Answers
Answer:
Ephemerals
Explanation:
The first plants to move into the new bare ground after a wildfire are wildflowers or “weeds.” These fast-germinating, leafy herbaceous plants are also known as “forbs” or “ephemerals.” They quickly germinate, grow and produce a new crop of seeds.
Answer:
ephemeral
Explanation:
An -ite or -ate ending on the name of a compound indicates that the compound:
Answers
Explanation:
I'm not sure what it is
WILL MARK BRAINLIEST!!
Use complete sentences to differentiate between acids and bases on the basis of their behavior when dissolved in water. Give an example of each type.
Please be simple and original....DONT PLAGIARIZE PLEASE!! 50 points!
Answers
Answer:
acids and bases cancel each other out. acids increase H+ ions while bases release H+ ions
Explanation:
What is the charge of phosphate in AlPO4?
Answers
The charge of phosphate : 3-
Further explanationOxidation is an increase in oxidation number, while reduction is a reduction in oxidation number.
The formula for determining Oxidation Numbers in general:
1. Single element atomic oxidation number = 0.
Group IA (Li, Na, K, Rb, Cs, and Fr): +1
Group IIA (Be, Mg, Ca, Sr and Ba): +2
Group IIIA(Al, B) : +3
H in compound = +1, except metal hydride compounds (Hydrogen which binds to groups IA or IIA) oxidation number H = -1, for example, LiH, MgH₂, etc.
2. Oxidation number O in compound = -2, except OF2 = + 2 and in peroxide (Na₂O₂, BaO₂) = -1 and superoxide, for example KO₂ = -1/2.
3 The oxidation number in an uncharged compound = 0,
Total oxidation number in ion = ion charge, Example NO₃⁻ = -1
Compound AlPO₄ :
The oxidation number in an uncharged compound = 0
Since the charge of Al as group 3A (or group 13) is +3, while the AlPO₄ compound is a polyatomic compound (consisting of polyatomic ions PO₄ and Al), the PO₄ charge:
charge Al + charge PO₄ = 0
+ 3 + charge PO₄ = 0
charge PO₄ = -3
Why is the Law of Conservation of Mass a law, rather than a theory?
A. It has more scientific evidence supporting it
B. It has both independent and dependent variables
C. It has been tested with the latest laboratory balances, which are very accurate
D. It describes a repeatedly observed relationship, but it does not offer an exclamation
Answers
Answer: During a chemical reaction, matter cannot be created nor destroyed, matter can change form through physical and chemical changes, but through any of these changes, matter is conserved; even though the matter may change from one form to another, the same number of atoms exists before and after the change takes place.
Explanation: <3
how many moles are in 8.32 times 1024 molecules of CO2
Answers
Answer:
13.8 mol CO₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
8.32 × 10²⁴ molecules CO₂
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]8.32 \cdot 10^{24} \ molecules \ CO_2(\frac{1 \ mol \ CO_2}{6.022 \cdot 10^{23} \ molecules \ CO_2} )[/tex] = 13.816 mol CO₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
13.816 mol CO₂ ≈ 13.8 mol CO₂
What are the most common metric units used in science?
Answers
Answer its a
Explanation:
Which statement best explains why an object appears green in sunlight?
The object absorbs most white light and refracts most green light.
The object refracts most white light and absorbs most green light.
More green light is absorbed while more red and blue light is reflected.
More green light is reflected while more red and blue light is absorbed
Answers
Answer:
b i think because i think so
Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? TA B Block A has a higher temperature than block B heat flow The two blocks are the same temperature and heat flow stops Heatis transferred from the wamer block to the cooler block 2012 Encyclopædia Batannlea, Inc. B B heat flow
Answers
Answer:
Heat is transferred from the warmer block to the cooler block
Explanation:
Heat transfer by conduction involves two or more solids. The heat generally moves from a part at higher temperature to one with a lower temperature.
Heat transfer is based on the differences in temperature profile on a body. When the temperature of the body is the same, heat is not transferred. The molecules that makes up the hotter body collides with static molecules of the cold one. Through this, heat is transferred.Question 5
Which element has the oxidation number of +1 ?
Chlorine (CI)
Nitrogen (N)
Potassium (K)
Boron (B)
plz help
Answers
Answer:
Potassium (K)
Explanation:
The element with oxidation number of +1 is potassium.
Every element in the first group on the periodic table has an oxidation number of +1.
They are a group of metals known as the alkali metals. When they combine with other atoms, they prefer to lose an electron to form the bonds. A loss of an electron will give them a complete octet in their atomic structure.Simon has collected three samples from the coral reef where he observes marine life. He must determine whether each one is a pure substance or a mixture.
A 4-column table with 3 rows. The first column has entries sample A, sample B, sample C. The second column labeled appearance has entries clear liquid, clear blue liquid, opaque whitish liquid. The third column labeled when heated has entries evaporates completely at 70 degrees C, boils at 90 degrees Cleaving blue crystals behind, boils at 100 degrees leaving white crystals behind. The fourth column labeled when left over time has entries appearance does not change, appearance does not change, dust appears to settle at the bottom.
Sample A is a
, Sample B is a
, and Sample C is a
.
Answers
Answer:
SAMPLE A - pure substance.
SAMPLE B - homogeneous mixture.
SAMPLE C - heterogeneous mixture.
Explanation:
Answer:
pure substance.
homogeneous mixture.
heterogeneous mixture.
Explanation: