How many is too many

How many moles are there in each of 280g of silion

nasty-shy [4]

Answer:

10 moles

Explanation:

of moles = given mass /atomic mass = 280 g /28 g = 10 moles of Si atoms in 280g sample.

5 0

4 years ago

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How does the final paragraph relate to the main idea of the article? (4.03) science.

V125BC [204]

Answer:

Indicates the writer's stance on the main idea of a paragraph. The controlling idea appears in the paragraph's topic sentence. ... The final sentence of a paragraph that summarizes the topic sentence using different words. Words and phrases that show how the ideas in sentences and paragraphs are related.

Explanation:

HOPE THIS HELP

PICK ME AS THE BRAINLIEST

5 0

3 years ago

Jeffrey wants to lose weight by using caffeine to

irinina [24]

Answer:

4. The amount of caffeine in the drinks

5. The heart rate of the participants of the experiments

6. Water

7. i) The volume of drink taken should be constant

ii) The frequency of taking their drink is constant

iii) The time of drinking by the brothers is constant

Explanation:

In the question, Jeffery intends to find the caffeine drink that will result in the heart rate increasing most

The variables (varieties) of drinks tested by Jeffery = Pepsi, espresso, and water

Drink variable arranged by the order of increasing Caffeine content are presented as follows;

Caffeine content of water < Caffeine content of Pepsi < Caffeine content of espresso

The triplet with the double shot of espresso = The triplet with the highest heart rate

4. The independent variable is the variable which is suspected to be the cause of the specified observation

Therefore, in the question, the independent variable are the drinks with different amount of caffeine

5. The dependent variable is the effect or the outcome of the independent variable

The dependent variable in the question is the heart rate of the subjects in the study

6. The control group is the independent variable or input that is expected to give the minimum effect or output compared to other independent variables in the study such that the control group does not contain the suspected cause of the observation or effect under investigation

The control group (or variable) in the question is water which does not contain caffeine

7. Three constants that all three brothers should be doing are;

i) The three brothers should be taking a constant or the same quantity of their preferred drink

ii) The frequency at which they take their drinks should be constant

iii) The time at which the brothers take the drink should be the same

3 0

3 years ago

What's the difference between a molecular formula and a structural formula

Klio2033 [76]

Glucose and Galactose both have the same molecular formula, C6H12O6, but in the body, galactose must be first converted to glucose to make energy. The difference<span> is their </span>structures

3 0

3 years ago

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What cycloalkanes are present in a steroid ?

11Alexandr11 [23.1K]

Steroids are biologically very important compounds. They are made up of more that seventeen carbons. The structure of Steroid is comprised of a fused cycloalkane ring system. The simplest steroid and the main skeleton of all steroids is Gonane.

Gonane is made up of four cycloalkane rings i.e. tetracyclic hydrocarbon ring structure. Among these four rings 3 are cyclohexanes (designated as A, B and C) and one is cyclopentane (Designated as D). These four rings fuse to form a <span>cyclopentaperhydrophenanthrene.

The Nucleus (Gonane) of steroids along with some derivatives are shown below,</span>

3 0

3 years ago