You are looking for an element in the fourth period and a transition metal. As most have about 3 valence electrons. Gallium and Scandium work perfectly.
Answer:
Gallium is the Answer.
Explanation:
Ground water, the largest source of fresh water, is stored in bodies of rock and or sediment
a. porosity
b. sediment
c. particles
d. aquifers
i dont even know what this means
Answer:
particles
Explanation:
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HELP !!!!!!!!!!!!! PLEEEAAAAASSSSSSEEEE
How many moles is 415 g Fe?
Answer:
7.4312 moles
Explanation:
No of mole = mass in gram / molar mass
No of moles = 415/55.845
7.4312 moles
Please help!! I'll name you brainliest!!
Answer:
the awnsers are A and C
Explanation:
because
Can somebody help me please! Help would be much appreciated :))
Answer:
The first picture shows how the two H athoms finds each other. The second one, how these H athoms start's to form a covalent bond describing it by Lewi's estructure. And the last one, shows how the two athoms of H formed an H2 molecula.
Explanation:
Abel was running a fever of 107 degrees Fahrenheit, what was her temperature in degrees
Celsius?
Explanation:
we know the formula to convert farenheit to Celsius
=(F-32)(5/9)
=(107-32)(5/9)
(5/9)=375/9= 41.6 degrees Celsius
Im dum.b help
When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
Which statement corrects the error in the passage?
Question 3 options:
A baby grasshopper is a larva.
A baby grasshopper is a nymph.
The grasshopper nymph hatches.
The nymph has no exoskeleton.
Answer:
2.A baby grasshoper is a nymph.
Explanation:
Answer:
yourinagenjitsulol
Expert
75 answers
3.6K people helped
Answer:
2.A baby grasshopper is a nymph.
Explanation:
i agree
32 g of CH4 react with 128 g of O2, producing 88 g of CO2. How many grams of water are produced?
Answer:
88 g
Explanation:
32 g of CH4 react with 128 g of O2, producing 88 g of CO2.
How does energy play a role in different rock types forming? I had this question another time in my test and it's asking the same thing again.
Answer:
Yes
Explanation:
Yes, there are many energy forces that directly affect the formation of rocks and other substances. The Sun itself provides both energies in the form of heat/radiation and magnetic energy. Heat can get so intense when combined with pressure from being so far underground that it causes rocks to melt and become magma, which combines with other minerals and forms new types of rocks when they cool in the future. Magnetic energy helps push and pull the waves and wind on Earth which ultimately break down rocks into sand over the years.
How does environmental changes affect animals?
Environmental changes affect animals depending on their ability to adapt to new conditions.
What is adaptation?An adaptation is any type of phenotypic feature associated with a higher fitness in a particular environment.
Adaptations are features that allow organisms to adapt to challenging environmental conditions.
In conclusion, environmental changes affect animals depending on their ability to adapt to new conditions.
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4.91 M NaOH solution (density=1.04g/ mL)
A family pool holds 10,000 gallons of water. How many cubic centimeters is this?
Answer:
3.785412e+7cm³
Explanation:
Have a nice day.
How many moles are there in 17.6g NaOH?
Answer:
The answer is 39.99711. We assume you are converting between grams NaOH and mole. You can view more details on each measurement unit: molecular weight of NaOH or mol This compound is also known as Sodium Hydroxide.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.44moles are there in 17.6g NaOH.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.
Mathematically,
number of moles of NaOH =given mass of NaOH÷ molar mass of NaOH
Molar mass of 1 mole of NaOH= 40 g/mol
mass of NaOH= 17.6g
Substituting all the given values in the above equation, we get
number of moles of NaOH = 17.6g ÷ 40 g/mol
number of moles of NaOH =0.44moles
Therefore, 0.44moles are there in 17.6g NaOH.
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You do an experiment in which you need 0.25 mole of tyrosine (C,H11 NO3).
How many grams must you weigh out?
A). 45.3 g
B). 90.5 g
C). 181 g
D). 272 g
Answer:
B.90.5 g
Explanation:
not 100%sure hehe
Answer:
45.3
Explanation:
I got it wrong on my test and this was the only correct option for me.
H2O2 → H2O + O2
This is showing the reaction that we used in elephant’s toothpaste. Write and balance this equation on your own sheet of paper. If 24.53 g of hydrogen peroxide decompose, how many grams of water are produced.
Answer:
75.47
Explanation:
AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT
(Popcorn Stand) A salt shaker has 2.91 moles of NaCl, how many grams of NaCl are in the salt shaker?
Answer:
170 grams NaCl
Explanation:
Find the mass of NaCl by adding the two elements atomic mass
Na: 22.99
Cl: 35.45
22.99+35.45=58.44 g
Convert moles to grams.
2.91 mol NaCl * 58.44 g NaCl= 170.0604 g
During spontaneous fission, a nucleus of 25498Cf can produce 11846Pd, four neutrons, and what other nuclide?
Answer: 52Te - Tellurium
Explanation: Radioactivity occurs when an unstable nucleus of an element decompose into a stable element by emitting particles or forms of eletromagnetic energy. There are types of radioactivity and Spontaneous Fission is one of them.
In Spontaneous Fission, the unstable, also called parent, nucleus splits into two smaller nuclei and emitts one or more neutrons.
The reaction spontaneous fission of Cf is represented below.
25498Cf ⇒ 11846Pd + 4n + X
The characteristics of each element of the equation are:
1) The element Cf has atomic mass 254 and atomic number 98.
2) Element Pd has atomic mass 118 and atomic number 46.
3) Neutron is represented as n, has no atomic number and atomic mass 1.
Given these properties, to determine the other nuclide, we have to find out the nuclide's atomic number, as each element in the periodic table has its own atomic number.
At the left side of the equation, atomic number is 98. At the right side, element X's atomic number is
98 - 46 + 0 = 52
In the periodic table, the element with atomic number 52 is Tellurium, whose symbol is Te.
The other nuclide for the spontaneous fission is Tellurium (Te).
Can Someone Please help me answer this question? I will try to give brainliest.
Answer:
I believe the answer is y-axis
Explanation:
Sorry if it's not I just wanted to help you in return for helping me!!
Answer:
Y axis I think
Explanation:
An object with a
mass acclerates slower.
how many moles are in 32.3g of calcium phosphate
Answer: the formula mass of calcium phosphate [Ca3(PO4)2] is 310.177 amu, so its molar mass is 310.177 g/mol. This is the mass of calcium phosphate that contains 6.022 × 1023 formula units.
Answer: 310.177
Home can use ____to distribute warm air from a sunroom
Answer:
Solarpannels? I honestly don't know I'm just trying to be helpful.
what is the formula mass of MgO (how much does one mole of it weigh)
Answer:
40.3044 g/mol
Explanation:
hope this helps
A CANDLE WILL STAY LIT INSIDE THE SPACE SHUTTLE WHEN IT IS ON THE LAUNCH PAD, BUT NOT WHEN IT IS IN ORBIT. WHY?
Answer:
because there is no oxygen in space for it to burn
because all fire need oxygen to burn
Explanation:
Which plant structures are common to all angiosperms?
spores
flowers
cones
endoskeleton
Answer:
B
Explanation:
(25 POINTS AND BRAINLIEST)What is the volume of 2 mol of chlorine gas at STP?
2.0 L
11.2 L
22.4 L
44.8 L
Answer:
44.8
Explanation:
According to standard temperature and pressure and ideal gas equation , the volume of 2 mole of chlorine gas at STP is 44.8 liters.
What are standard temperature and pressure conditions?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.
These values are important to physicists, chemists ,engineers ,pilots and navigators.On substituting values in ideal gas equation, volume= 2×8.314×273/1=44.8 liters.
Thus, the volume of 2 mole of chlorine gas at STP is 44.8 liters.
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Part 1)
One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation- Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Answer in units of g.
Part 2) What mass of MgCl2 is produced? Answer in units of g.
Part 3) What mass of H2 is produced? Answer in units of g.
Answer:
Part 1: 229.95g
Part 2: 598.5g
Part 3: 12.6g
Explanation:
Note: I learned this last week. Answer not sure.
Pls tell me if i got it right or wrong.
Mg + HCl - > MgCl2 + H2
First, balance the equation.
There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.
Mg + 2HCl - > MgCl2 + H2
Formula 1: (n= m/mr)
n = moles, m= mass, mr = molecular mass
Formula 2: (n= v/24)
v = volume
Part 1
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Ratio of
(look at the number in front of each)
2HCl : Mg
2 : 1
(3.15 x 2) : 3.15 moles
6.3 moles : 3.15 moles
So 2HCl has 6. 3 moles
Now use formula 1 (n = m/mr)
Calculate molecular mass of HCl
Check your periodic table
mr of HCl =(1 + 35.5) = 36.5
6.3 = m/36.5
m = 229. 95grams
Part 2
What mass of MgCl2 is produced? Answer in units of g.
Ratio of
2HCl : MgCl2
(1 +35.5) : (24+35.5x2)
36.5: 95
229.95g :?
229.95g : 598.5g
m = 598.5g
Part 3
What mass of H2 is produced? Answer in units of g.
2HCl : H2
36.5 : 2
229.95g :?
229.95g : 12.6g
m = 12.6g
how many grams are in 7.4 moles of HgS?
Answer: 1721.6 grams
Explanation:
What kind of scientist would study the the force of a car running into a wall
A. A Chemist
B. A physicist
C. A Botanist
D. A Biologist
Answer:
B. A Physicist
Explanation:
When solid copper reacts with aqueous silver nitrate, the products are copper (II) nitrate and silver metal. How
many grams of silver would be produced from 83.94 grams of silver nitrate?
Answer:
This chemical equation means: One mole of solid copper plus two moles of aqueous silver nitrate produce one mole of copper(II) nitrate plus two moles of solid silver. This is a single replacement reaction in which the metal copper replaces the metal silver.
Explanation:
Hope this help
What did Albert Einstein say was the nature of electromagnetic radiation?
Answer:
Albert Einstein proposed the wave-particle theory of electromagnetic radiation. This theory states that electromagnetic energy is released in discrete packets of energy—now called photons—that act like waves.