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Usimov [2.4K]
3 years ago
9

How to do this ? it’s chemistry

Chemistry
1 answer:
natima [27]3 years ago
5 0

Answer:

1. Metals (H)

2. Nonmetals (K)

3. Period (P)

4. Family (C)

5. Metaloids (E)

6. Menedleev (M)

7. Halogens (D)

8. Alkalai (A)

9. Transitional Metal (T)

10. No Family Name (M)

11. Noble Gas (P)

12. Alkaline Earth Metals (B)

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On Wednesday, a local hamburger shop sold a combined total of 327 hamburgers and cheeseburgers. The number of cheeseburgers sold
timofeeve [1]

Answer:

The number of hamburgers is 109.

Explanation:

Let h = number of hamburgers

Let c = number of cheeseburgers

The total number sold gives us the equation below.

h + c = 327

"The number of cheeseburgers sold was two times the number of hamburgers sold.

This gives us the equation

c = 2h

Now we substitute c with 2h in the first equation and solve for h.

h + 2h = 327

3h = 327

h = 109

The number of hamburgers is 109.

7 0
3 years ago
Threonine is a naturally occurring amino acid that has two stereogenic centers. The naturally occurring amino acid has the 2S, 3
dimulka [17.4K]

Explanation:

Amino acids are the organic compounds which contains both amine as well as carboxyl functional groups, with a side chain along to the molecule which is specific to each amino acid.

<u>Threonine is a naturally occurring amino acid which has two stereogenic centers. The possible stereoisomers of theronine is 4. The naturally occurring amino acid has the 2S, 3R configuration at its two stereogenic centers.</u>

The structure is shown in image below.

4 0
3 years ago
All of the following, except a _ might be studied by a microbiologist.
timurjin [86]
It would be a human egg cell. Microbiologists study microscopic organisms that cause infections, including viruses, bacteria, and fungi+algae
8 0
4 years ago
Calculate the volume occupied by 32.0 g of O2 gas, the pressure of the O2 gas is 78.5 kPa at 25°C.
Oksi-84 [34.3K]

Answer: 31.5L

Explanation:

6 0
3 years ago
A sample of hellium has a volume of 500 mL at STP. What will be its new volume be in mL if the temperature is increased to 325 K
Anna11 [10]

Answer:

V_2=482.5mL

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by using the combined gas law due to the fact that we are dealing with variable volume, temperature and pressure:

\frac{P_2V_2}{T_2}=\frac{P_1V_1}{T_1}

In such a way, we solve for the final volume, V2, considering that the initial volume, V1, is 500 mL, the initial temperature, T1, is 273 K (STP), the initial pressure, P1, is 1 atm (STP) and the final temperature, T2, is 325 K and the final pressure, P2, is 125 kPa (1.23 atm):

V_2=\frac{P_1V_1T_2}{T_1P_2} \\\\V_2=\frac{(1atm)(500mL)(325K)}{(273K)(1.23atm)} \\\\V_2=482.5mL

Regards!

8 0
3 years ago
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