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3 years ago

What element do you think is the most abundant in the star that you observed in part two? explain your answer?

1 answer:

mote1985 [20]3 years ago

6 0

The most abundant element in the Sun and in the stars are hydrogen and helium. Like most of the stars, there is a spontaneous radioactive reaction happening in the Sun. Hydrogen is transformed into Helium. As long as the stars are young, the most abundant element is hydrogen.

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Hydrogen bonds within liquid water are attractions between protons and hydroxide ions. are dipole-dipole attractions. are ion-in

barxatty [35]

Answer:

true because the bonds cannot be broken down

6 0

3 years ago

Wich value gives the number of particles in 1 mol of a substance

juin [17]

Answer: 6.022x10²³ (Avogadro's Number)

Explanation: The number of particles in 1 mole of a substance is determined by the Avogadro's Number.

5 0

3 years ago

Read 2 more answers

What is the molecular formula of a compound with the empirical formula CH and a molar mass of 39.01 grams per mole? a.CH b. C2H2

likoan [24]

So knowing the mass of C and H, C=12g and H=1g. We can have 3 C's (3*12=36) and 3 H's (3*1=3) so 36+3 is 39. Plus C3H3 has an empirical formula of CH since C3H3 can be simplified

3 0

4 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

John and his wife are celebrating their first wedding anniversary. Their dinner consists of 55 grams of carbohydrates, 36 grams

nika2105 [10]

Answer: 733 kcal

Explanation:

According to a system used to calculate the available energy of foods, we have the following data:

protein has 4 kcal/g
carbohydrates has 4 kcal/g
fat has 9 kcal/g
alcohol has 7 kcal/g

So, we are told Jhon and his wife's dinner has:

55 g of carbohydrates
36 g of protein
27 g of fat
18 g of

Now we have to multiply these values by the kilocalories:

(55 g of carbohydrates)(4 kcal/g)=220 kcal
(36 g of protein)(4 kcal/g)=144 kcal
(27 g of fat)(9 kcal/g)=243 kcal
(18 g of alcohol)(7 kcal/g)=126 kcal

Then we have to sum all, giving the following result:

4 0

4 years ago