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Nataly [62]
2 years ago
7

HELLLLLLPPPPP

Chemistry
2 answers:
atroni [7]2 years ago
8 0

Answer:

An open series circuit

Explanation:

I'm late but for future people...

I took the test.

mars1129 [50]2 years ago
6 0

Answer:

a closed series circuit

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What are two versions of genes called and how are they diffrent?
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Answer with Explanation:

Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits. Since human cells carry two copies of each chromosome they have two versions of each gene.

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Read 2 more answers
What is the standard enthalpy change for the following reaction?
Ipatiy [6.2K]

Answer:

- 2977 kJ

Explanation:

Let's consider the following reaction.

3 CH₄(g) + 4 O₃(g) → 3 CO₂(g) + 6 H₂O(g)

We can find the standard enthalpy change for the reaction (ΔH°r) using the following expression.

ΔH°r = [3 mol × ΔH°f(CO₂(g)) + 6 mol × ΔH°f(H₂O(g))] - [3 mol × ΔH°f(CH₄(g)) + 4 mol × ΔH°f(O₃(g))]

ΔH°r = [3 mol × (-393.5 kJ/mol) + 6 mol × (-241.8 kJ/mol)] - [3 mol × (-74.87 kJ/mol) + 4 mol × (142.7 kJ/mol)]

ΔH°r = - 2977 kJ

8 0
2 years ago
11. A sample contains 25% water and weighs 201 grams. Determine the grams of water in the
77julia77 [94]

Answer:

m_{water}=50.25g

Explanation:

Hello,

In this case, considering that the by-mass percent of water is:

\% m/m=\frac{m_{water}}{m_{sample}}*100\%

Given such percent and the mass of the sample, we can find the mass of water in grams in the sample by solving for it as shown below:

m_{water}=\frac{\%m/m*m_{sample}}{100\%}\\ \\m_{water}=\frac{25\%*201g}{100\%}\\ \\m_{water}=50.25g

Best regards.

5 0
3 years ago
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