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4vir4ik [10]
3 years ago
11

What do the numbers listed for an element on the periodic table represent?

Chemistry
2 answers:
Anna007 [38]3 years ago
8 0
The smaller number is the number of protons, and the greater number is the mass.
almond37 [142]3 years ago
8 0
The smaller number is protons and the greater number is the mass. If you subtract the larger number from the smaller it can show you how many neutrons there is it that element
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What is the substance that is formed when the acid react with bases in a neutralization reaction?​
Leya [2.2K]

Answer:

Water and Salt

Explanation:

A neutralization reaction occurs when an acid and a base react to produce water and a salt, and it entails the formation of water from the mixture of H+ and OH- ions.

4 0
3 years ago
Read 2 more answers
Frank pulls down on a garage door with a force of 80 N. If the door weighs 210 N, what is the net downward force on the door?
elena-s [515]

Answer:

290 N

Explanation:

Total downward force = Force applied on the door in bringing it down + weight of the door

Total downward force = 80 + 210

Total downward force = 290N

7 0
4 years ago
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In a coffee-cup calorimeter, 1.60 g of NH4NO3 was mixed with 75.0 g of water at an initial temperature of 25.008C. After dissolu
jekas [21]

Answer:

Explanation:

mass of the solution m = 1.6 + 75 = 76.6 g

fall in temperature = 25 - 23.34 = 1.66°C

heat absorbed = mass x specific heat x fall in temperature

= 76.6 x 1.66 x 4.18

= 531.5 J .

= .5315 kJ .

mol weight of ammonium nitrate = 80 g

heat absorbed by 1.6 g = .5315 kJ

heat absorbed by 80 g or one mole = 26.575 kJ

enthalpy change ΔH = +26.575 kJ

b )

enthalpy of hydration = 2630 kJ / mol

lattice energy = enthalpy of hydration + enthalpy change

= 2630 + 26.575

= 2656.575 kJ  .

7 0
3 years ago
PLEASE ANSWER ASAP AND SHOW WORK: A camping stove uses a 5.0 L propane tank that holds 68.0 moles of liquid C3H8. How large a co
seropon [69]

<u>Answer:</u> The volume of the container needed is 554.6 L

<u>Explanation:</u>

To calculate the volume of the gas, we use the equation given by ideal gas which follows:

PV=nRT

where,

P = pressure of the gas = 3.0 atm

V = Volume of the gas = ? L

T = Temperature of the gas = 25^oC=[25+273]K=298K

R = Gas constant = 0.0821\text{ L.atm }mol^{-1}K^{-1}

n = number of moles of propane gas = 68.0 moles

Putting values in above equation, we get:

3.0atm\times ?L=68mol\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K\\\\V=\frac{68\times 0.0821\times 298}{3.0}=554.6L

Hence, the volume of the container needed is 554.6 L

6 0
3 years ago
Choose the more metallic element from each pair.
Paraphin [41]

Answer:

c

Explanation:

CI or O

Carla Vista Company has the following information available for September 2020.

Unit selling price of video game consoles $410

Unit variable costs $328

Total fixed costs $36,900

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Compute the unit contribution margin.

Unit contribution margin enter the unit contribution margin

Prepare a CVP income statement that shows both total and per unit amounts.

Compute Carla Vista’ break-even point in units.

Break-even point in units enter Break-even point in units units

Prepare a CVP income statement for the break-even point that shows both total and per unit amounts.

5 0
3 years ago
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