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Mademuasel [1]
3 years ago
8

Air contains about 78% nitrogen and 21% oxygen. What can you conclude from this fact? Air is a mixture of at least two gases Air

consists of different states of matter Air is a pure substance Air consists of components that are chemically joined
Chemistry
1 answer:
rusak2 [61]3 years ago
7 0

Answer:

yes air is a mixture of many gases

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How does knowing the meaning of prefix-trans help you remember what happens to light that strikes a translucent object ?
katovenus [111]

Explanation:

The prefix trans- and its variant tra- mean "across".

A translucent substance allows some light to go "across" it to the other side. Also, think about a transparent substance: it allows light to go "across" it; or a translation, it is a going "across" from one language into another.

6 0
3 years ago
What is the approximate energy of a photon having a frequency of 4 x 10^7 Hz (h=6.6 x 10^-34]•s)
jok3333 [9.3K]

Answer:

E = 26.4 ×10⁻²⁷ j

Explanation:

Given data:

Energy of energy =?

Frequency = 4×10⁷ Hz

Solution:

Formula:

E = hf

E = hf

E =  6.6  ×10⁻³⁴ m²Kg/s  . 4×10⁷ Hz

Hz = s⁻¹

j = m²Kg/s ²

E = 26.4 ×10⁻²⁷ j.

5 0
4 years ago
Pls help me <br> brainliest, rattings etc<br> its 2 questions and I am very confused!<br> 8 pts!
Serjik [45]
Ouestion no 10 answer is first and 11 is 3
6 0
4 years ago
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Besides sugars and fats, organisms can use other molecules as fuel for cellular respiration. When protein molecules are used, __
Akimi4 [234]

Answer:

amino groups

Explanation:

The cellular respiration pathways are central in the extraction of energy from all these different molecules. Amino acids, lipids and other carbohydrates can become different intermediates of glycolysis and the citric acid cycle; this allows them to enter the path of cellular respiration through other different doors. Once these molecules enter the pathway, there is no difference due to their origin: they simply continue through the remaining steps and produce NADH, FADH2 and ATP

When you eat proteins, your body has to break them down into amino acids before they can be used by your cells. Most of the time, amino acids are recycled and used to form new proteins, they do not oxidize as fuel.

However, if there are more amino acids than the body needs or if the cells are fasting, some amino acids are degraded for energy purposes by cellular respiration. In order to enter cellular respiration, amino acids must first get rid of their amino group. This step generates ammonia (NH 3) as a waste product, which - in humans and other mammals - is converted to urea and removed from the body through urine.

3 0
3 years ago
True or False: In every gram of sucrose (table sugar) there is 0.513 g of oxygen
Ber [7]

Answer:

True

Explanation:

Step 1: Find molecular formula of sucrose

C₁₂H₂₂O₁₁

Step 2: Convert moles of oxygen present to grams

1 mol O = 16 g O

11 mol O = 176 g O

Step 3: Find molar mass of sucrose

C - 12.01 g/mol

H - 1.01 g/mol

O - 16.00 g/mol

12.01(12) + 22(1.01) + 11(16.00) = 342.34 g/mol C₁₂H₂₂O₁₁

Step 4: Set up dimensional analysis

1 gC_{12}H_{22}O_{11}(\frac{176 gO}{342.34gC_{12}H_{22}O_{11}} )

Step 5: Multiply/Divide and cancel out units

Grams of C₁₂H₂₂O₁₁ and grams of C₁₂H₂₂O₁₁ cancel out.

We are left with grams Oxygen

176/342.34 = 0.514109 grams Oxygen

4 0
3 years ago
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