Explanation:
Explanation:
Given the molecular weights:
M
r
N
a
O
H
=
40
g
m
o
l
M
r
N
a
2
S
O
4
=
142
g
m
o
l
The analogy of the moles will be held constant:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
1
n
N
a
O
H
n
N
a
2
S
O
4
=
2
For each one, substitute:
n
=
m
M
r
Therefore:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
m
N
a
O
H
M
r
N
a
O
H
m
N
a
2
S
O
4
M
r
N
a
2
S
O
4
=
2
200
40
x
142
=
2
200
⋅
142
40
x
=
2
200
⋅
142
=
2
⋅
40
x
x
=
200
⋅
142
2
⋅
40
=
100
⋅
142
40
=
10
⋅
142
4
=
1420
4
=
=
710
2
=
355
g
r
a
m
s
(or just use a calculator
Aqueous aluminum phosphate reacts with solid magnesium to produce solid aluminum and aqueous magnesium phosphate. Write the balanced chemical equation for this chemical reaction using the correct chemical formulas and include conditions (s, l, g, or aq). Put your answer in the box below.
Answer:
2AlPO4(aq) + 3Mg(s) -------> Mg3(PO4)2(aq) + 2Al(s)
Explanation:
The principle of writing balanced chemical reaction equations states that; the number of atoms of each element on the right hand side of the reaction equation must be equal to the number of atoms of the same element on the left hand side of the reaction equation.
The reaction is between aqueous aluminum phosphate reacts and solid magnesium to produce solid aluminum and aqueous magnesium phosphate. The equation is represented as follows;
2AlPO4(aq) + 3Mg(s) -------> Mg3(PO4)2(aq) + 2Al(s)
HURRY!!!
What can you infer about the growth of the seed represented in the graphs below?
Answer:
B
Explanation:
I NEED THIS ASAP Someone please help me
Read the chemical equation. 2NaOH + H2SO4 → Na2SO4 + 2H2O Which of the following statements would be correct if four moles of NaOH were used in this reaction?
A. Two moles of water were produced from this reaction.
B. Four moles of water were produced from this reaction.
C. One mole of H2SO4 was used in this reaction.
D. Eight moles of H2SO4 were used in this reaction.
Answer:
the answer is B
Explanation:
Answer: B!
Explanation:
B. Four moles of water were produced from this reaction.
got it right on the test :-)
in what group and periods is most reactive metals
ANSWER FAST PLEASE!
Balance the following equation:
__Hg + __O₂ --> __HgO
Answer:
4Hg+2O2=4HgO
four Mercury + four oxygen
Please help this is due soon
Turtles are cold blooded, meaning they use the Sun to keep warm. A student hypothesizes that his pet turtle will prefer swimming in warm water. He places his turtle on a rock in the middle of the bathtub, and measures how much time the turtle spends off of the rock during a five minute period. He conducts the experiment under four conditions in the bathtub: no water, warm water, cool water , and room temperature water. In this experiment, which is the control group ?
Answer:
Room temperature water
Explanation:
Neither the amount of water nor the temperature of the water has been changed.
Looking at the chart, which substance would heat up the fastest?
Question 9 options:
Iron
Aluminum
Brass
Alcohol
Answer:
Aluminum would heat up the faster
What do you think could happen with methane gas and CO 2
Answer:
these gases accumulate in the atmosphere and create the heat-reflective layer that keeps the Earth at a livable temperature. These gases form the insulation that keeps the planet warm enough to support life
Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)
Use the equation above to determine the number of grams of magnesium chloride, MgCl2 , that can be produced if 4.00 moles of HCl (hydrochloric acid) react. please show all work and record your answer with proper units and significant figures.
Pls help
Answer:
m = 190. g MgCl2
Explanation:
Use a molar ratio to get the # of moles MgCl2 produced from 4.00 mol of HCl:
4.00 mol HCl × (1 mol MgCl2/2 mol HCl) = 2.00 mil MgCl2
So 2.00 moles of MgCl2 will be produced. To find the mass in grams, use the molar mass of MgCl2:
2.00 mol MgCl2 × (95.211 g MgCl2/1 mol MgCl2)
= 190. g MgCl2
Identify Acid-base and conjugate acid-base pair in the following: HCOOH + H20 --> HCOO + H3O+ *
Explanation:
HCOOH (aq) + H2O (l) ⇋ HCOO- (aq) + H3O+ (aq)
acid 1 base 2 base 1 acid 2
8. Which of the following have bacteria in their root nodules that fix nitrogen?
1. Legumes
b. Meat
c. "Trees
d. Algae
Answer:
Option A
Explanation:
Leguminous plants like pulses etc. have root nodules comprising of rhizobacterium which live in a symbiotic relationship with the roots of the plant and in turn fix the nitrogen in the soil in the roots of the leguminous plants.
Hence, option A is correct
A fully inflated hot air balloon has a volume of 1,840,000 liters at 100˚C. What approximate volume will the balloon have at 50˚C?
Answer:
920,000 liters
Explanation:
i divided by 2
What do sex hormones do?
Answer:
Hormones help regulate many bodily processes, such as appetite, sleep, and growth. Sex hormones are those that play an essential role in sexual development and reproduction. The main glands that produce sex hormones are the adrenal glands and the gonads, which include the ovaries in females and testes in males
Explanation:
How do we balance a chemical equation?
O adding elements as necessary
changing subscripts
erasing elements as necessary
placing coefficients
Answer: placing coefficients
Explanation: In a balanced chemical equation, the total number of atoms of each element present is the same on both sides of the equation. Stoichiometric coefficients are the coefficients required to balance a chemical equation. These are important because they relate the amounts of reactants used and products formed.
H2 + O2 + H2O how do I balance this?
Explanation:
[tex]2H _{2(g)} + O _{2(g)}→2H _{2}O _{(l)}[/tex]
Insert 2 on Hydrogen then a 2 on water molecule.
How much energy (in KJ) is needed to melt 15g of ice at -4oC and raise it to a temperature of 115oC? Round the closest number, and include units
Answer:
The energy needed is 45.7659 kJ
Explanation:
The given mass of the ice, m = 15 g
The initial temperature of the ice, T₁ = -4°C
The temperature
The final temperature, T₂ = 115°C
The specific heat capacity of ice, c₁ = 2.09 J/(g·°C)
The latent heat of ice, l₁ = 334 J/g
The heat capacity of water, c₂ = 4.184 J/(g·°C)
The latent heat of vaporization, l₂ = 2260 J/g
The specific heat of steam, c₃ = 2.02 J/g
Therefore, we get the energy needed, ΔQ, as follows;
ΔQ = m·c₁·(T₂ - Tₐ) + m·l₁ + m·c₂(Tₓ - Tₐ) + m·l₂ + m·c₃·(T₂ - Tₓ)
Where;
Tₐ = The melting point temperature of water = 0°C
Tₓ = The boiling point temperature of water = 100°C
∴ ΔQ = 15×2.09×(0 - (-4)) + 15 × 334 + 15×4.184×(100 - 0) + 15×2260 + 15×2.02×(115 - 100) = 45,765.9
The energy needed, ΔQ = 45,765.9 J = 45.7659 kJ.
What is DNA. in your own words
Answer: Molecule that stores genetic information in all organisms.
Explanation:
Choose one food chain in the web. Name all of the organisms in that chain. Start with a producer and end with the top level consumer.
Answer:
Sun
↓
Alfalfa
↓
Rabbit
↓
Coyote
Explanation:
To find - Choose one food chain in the web. Name all of the organisms in that chain. Start with a producer and end with the top level consumer.
Solution -
We know that,
A food chain is a series of events in which one organism eats another and obtains energy.
The Food chain is as follows :
Sun
↓
Alfalfa
↓
Rabbit
↓
Coyote
The ____ are a windless zone.
Answer:
sorry I don't know I just came for points
Explanation:
Element 2 is:
A) Cobalt
B)Chlorine
C)Calcium
D)Carbon
Answer:
D: Carbon
Explanation:
Carbon is the sixth element with a total of 6 electrons in the periodic table. Hence the atomic number Z = 6. The ground state electron configuration of carbon is 1s2 2s2 2p2. An excited state electron configuration of carbon is 1s2 2s1 2p3.
How can we use patterns on the periodic table to predict an element’s structure and reactivity?
Answer:
The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.
help me get this right no links
2. A dark shadow covers a small part of the Sun's surface.
(HAVE A GOOD DAY!!)
plz help me get this right and no links
Answer:
Outer planets are significantly colder than other planets! The answer is B.
Explanation:
The main difference between inner and outer planets is that inner planets have a high temperature compared to outer planets.
HELP ME WITH THIS PLSSSSS
Answer:Predatorrrrrrrrrrrrrrrr
Pls gimme Brainliest
Will give brainliest!
How does the melting of ice caps near the North Pole affect the salinity of the ocean?
Salinity decreases because freshwater flows into the ocean
Salinity increases because of the stored pockets of air and salt
Salinity increases because salt from the ice caps flows into the ocean
There is no change in the ocean’s salinity with this process
Answer:
A.
Explanation:
melting of ice will increase water in oceans due to which water in oceans will increase and salinity will decrease. hence, melting of ice caps near the north pole affects salinity of the ocean
I'm timed! Select the STEM-related activities performed in the fashion industry.
garment weaving
market analysis
pattern making
fabric dyeing
product promotion
product advertising
Answer:
All of them I think
Explanation:
STEM is science, technology, engineering and math, and all of them use that in some aspect
What likely caused these different results?
Answer:
hope help you stay happy
How many liters of water would you need to add to 4.36 moles of NaCl to create a 4 M solution?
Explanation:
1 M = 1 mol/L
4.36 mol NaCl ×(1L H20 / 4 mol NaCl) = 1.09 L H20
Answer:
1.09 L of water
Explanation:
4.36 mol NaCl ×(1L of H20 / 4 mol NaCl) = 1.09 L of water
How do the electron configurations for chlorine explain the steps pls
Answer:
follow the steps
Explanation:
First make a circle and write 17p and 18n below 17 p.Now again make another circle bigger than previous one and make two small circle .Again make another bigger circle and fill it with 8 small circles .Again make another bigger circle than previous ones and make 7 small circles in it .Now write e in small circles .Then write
Chlorine
Atomic number=17
Atomic weight =35
Shell k l m n
no.of e .2 1 × ×