Answer:
56.0774g/mol
Explanation:
hope you like it ☺️
Beryllium hydrogen carbonate is more than 3% hydrogen by mass.
True
False
What type of reaction occurs without the addition of heat?
Answer:
A
Explanation:
A spontaneous reaction doesn't require any addition of heat.
The rest of the choices require a transfer of heat energy.
Select the correct answer.
A circuit is used in which process?
OA. electricity
OB. magnetism
OC. velocity
OD. gravity
Answer:
electricity
Explanation:
A circuit is used in every electrical and electronics operation.
Explain why is it a good idea for the eco-house to have both a wind turbine and solar panels?
Answer:
Explanation:
Wind is more of an efficient power source than solar. Compared to solar panels, wind turbines release less CO2 to the atmosphere, consume less energy, and produce more energy.
Work out the relative formula mass of ammonium nitrate, NH4NO3.
Relative atomic masses: H 1; N 14; O 16.
...........................................................................................................................
...........................................................................................................................
Relative formula mass of ammonium nitrate = ...............................
Answer:
The relative molecular mass of ammonium nitrate is 80 gm
Explanation:
[tex]M_{NH4NO3}[/tex] = 14 + (4 × 1) + 14 + (16 × 3) = 80 (gm)
Which example in the video is a physical change?
A) Burning steel wool
B) Mixing chemicals
C) Rusting nail
D) Melting ice cream
D melting ice cream because if u know what a physical change is its a change that you can reverse chimical change are changes you cant reverse so u can freeze back ice cream so :D
The pH of a solution is 8. Some hydrochloric acid is added to the solution. Suggest the pH of the solution after mixing. pH=.......??
Answer:
Probably around 6 because the ph of hydrochloric acid is 3
Explanation:
A gas has a volume of 25 ml, at a pressure of 1 atmosphere (1 atm). Increase the volume to 125 ml and the temperature remains constant. What is the new pressure? please help
Explanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2 \\[/tex]
Since we're finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
We have
[tex]P_2 = \frac{25 \times 1}{125} = \frac{25}{125} = \frac{1}{5} = 0.2 \\ [/tex]
We have the final answer as
0.2 atmHope this helps you
This gardener started with much smaller plants in this park. Over time, the garden has grown into a large display of brilliant flowers. What would you tell the gardener to explain how the plants have grown and flourished so successfully?
How many formula units are in 325 grams of iron (III) chloride?
Answer:
1.204 × 10^24 formula units
Explanation:
Using the following formula to convert mass of iron (III) chloride to moles;
mole = mass/molar mass
Molar mass of FeCl3 = 56 + 35.5(3)
= 56 + 106.5
= 162.5g/mol
Mole = 325/162.5
mole = 2mol
Next, to calculate the formula units of FeCl3, we multiply the number of moles of FeCl3 by Avagadro number (6.02 × 10^23)
Formula units of FeCl3 = 2 × 6.02 × 10^23
12.04 × 10^23
= 1.204 × 10^24 formula units.
The first organisms to arrive in an ecosystem?
How many atoms are there in 6.8g of S?
PLS HELP ASAP NO LINKS
What type of scientist studies matter and its composition?
Biologist
Chemist
Physicist
Engineer
Answer:
.biology and maybe physics
Answer:
Biologist
ExplanationBiologist Unlike the above type of scientist, geoscientists’ work involves exploring the earth and its internal environment. They study the composition, structure, and processes of the earth by being indoors and outdoors. They contribute to the discovery of mines, petroleum deposits, minerals, and other aspects of the earth.
Which procedure is an attempt to correct a genetic disorder by replacing a mutated gene with a normal allele?
O selective breeding
• cloning
O artificial selection
•
gene therapy
gene therapy
Explanation:
Gene therapy, also called gene transfer therapy, the introduction of a normal gene into an individual's order to repair a mutation that causes a genetic disease.
Answer:
C artificial selection
Explanation:
Brainly please
Why is carbon dioxide a covalent bond?
Explanation:
One atom of carbon (2.4) combines with two atoms of oxygen (2.6) to form the compound carbon dioxide CO2 (only the outer shell of carbon's electrons are shown). ... The carbon dioxide molecule is held together by the strong C=O. carbon–oxygen double covalent bonds by sharing electrons.
Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans ____.
A.increases
B.doubles
C.remains balanced
D. decreases
Answer: Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
Explanation:
When evaporation takes place in sea water then of course there will occur an increase in salinity.
But as this evaporated water is replaced by water coming from rivers. As a result, the raising salinity is counter balanced by the water coming from rivers.
Hence, salinity remains balanced in sea water.
Thus, we can conclude that because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
Which product is made from nonmetallic mineral resources?
a. Stainless steel
b. iron nails
c. Copper wires
d. concrete
Answer:
Concrete
Explanation:
A volume of 3.0 L of air is warmed from 50 degrees celsius to 100 degrees celsius. What is the new volume if the pressure remains constant?
Answer:
3.45 L
Explanation:
Temperature and volume are linearly related (when one increases or decreases, so does the other).
Convert the temperature to Kelvin:
50 °C = 323 K
100 °C = 373 K
To find the rate of change, divide 373 by 323 to get roughly 1.15
Multiply the amount of liters by this factor to get your answer
How much heat, in kilojoules, is needed to raise the temperature of 236 g of silver from 8.5oC to 34.9 °C? (cAg = 0.24 J/g°C)
Answer:
1.49kJ
Explanation:
Using the formula as follows;
Q = m × c × ∆T
Where;
Q = amount of heat (joules)
m = mass (g)
c = specific heat of silver (J/g°C)
∆T = change in temperature (°C)
According to the information given in this question;
mass of Silver (Ag) = 236g
c of Ag = 0.24 J/g°C
initial temperature (T1) = 8.5°C
final temperature (T2) = 34.9°C
∆T = T2 - T1 = 34.9 - 8.5 = 26.4°C
Using Q = m × c × ∆T
Q = 236 × 0.24 × 26.4
Q = 1,495.3 Joules
Amount of heat needed to raise the temperature of Silver (Q) in kilojoules is 1495.3/1000 = 1.4953
Q = 1.49kJ
If you stay at 90 degrees Celsius and a gas in a liquid solution has a pressure of 2 atm, what solubility should it have if it has a solubility of 64 g/L at a pressure of 8 atm?
Answer:
im not sure
Explanation:
What are carbohydrates?
A. a type of base
B. a type of glyceride
C. a type of macromolecule
D. a type of amino acid
Answer:
a
Explanation:
me say so
Answer:
C
Explanation:
What type of wave has the SHORTEST wavelength and the highest frequency?
Answer:
The answer is gamma rays.
Explanation:
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies on the electromagnetic spectrum.
Please and thank you in advance. Due today
Answer:
Sorry I really don't know but can you help with one of my question I posted please thanks.
Convert 6.71 moles NH3 to number of molecules.
Answer: There are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].
Explanation:
Given: Moles of [tex]NH_{3}[/tex] = 6.71 mol
According to the mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{22}[/tex] molecules.
Therefore, molecules present in 6.71 moles are calculated as follows.
[tex]Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}[/tex]
Thus, we can conclude that there are [tex]40.41 \times 10^{23}[/tex] molecules present in 6.71 moles of [tex]NH_{3}[/tex].
How does the energy in chemical bonds affect the energy in a chemical reaction?
Answer:
Is by comparing the energy absorbed when bonds in the reactants are broken with the energy released when bonds in the products are formed, you can determine whether a chemical reaction releases energy or absorbs energy overall. Chemical reactions that release energy are called exothermic
Three students measured the volumes of a pebble whose accepted volume is 2.71 cm3. Which list represents both accurate and precise:
A: 2.60 mL, 2.60 mL, 2.59 mL, 2.59 mL
B: 2.70 mL, 2.69 mL, 2.71 mL, 270 mL
C: 2.75 mL, 2.74 mL, 2.64 mL, 2.71 mL
D: A and B
Answer:
C
Explanation:
what will litmus paper turn when it reacts with sodium nitrate?
Find the pH of a solution with a [H+] of 0.045M.
Answer:
1.35Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ {H}^{+} ])[/tex]
From the question
[H+] = 0.045 M
We have
[tex]pH = - log(0.045) \\ = 1.346787...[/tex]
We have the final answer as
1.35Hope this helps you
Answer:
1.35
Explanation:
in your notebook,write the appropriate tempo for the following actions.Then demostrate the actions then,demostrate the action in front of your parents,guardian
Answer:
cell :—
•They lack a well-defined nucleus, have a nucleoid instead.
•Usually have double-stranded, circular DNA.
•Do not have mitochondria.
Eukaryotic cell :—
•Have a well-defined nucleus enclosed in the nuclear membrane.
•Have a linear double-stranded nucleus.
•Mitochondria are present.
FIRST GETS BRAINLIEST (THE ONE THAT IS CORRECT)
A generator changes (Mechanical, Electrical, Static) energy into
(Mechanical, Electrical, Magnetic) energy.
Answer:
mechanical energy to electrical energy
Explanation:
The water turns the turbine with produces mechanical energy so the generator converts it to electrical energy