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goldenfox [79]
2 years ago
7

QUESTION 3 A large system of stars held in place by mutual gravitation. IT

Chemistry
1 answer:
maxonik [38]2 years ago
4 0

Answer: Galaxy

Explanation: A galaxy is a large system of stars held in place by mutual gravitation.

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How can you tell if glucose is present?
rosijanka [135]

Answer:

Plants use photosynthesis to make glucose. Glucose is also know as sugar. You can tell it is present if the plant receives sunlight as well as water.

Explanation:

MARK BRAINLIEST

4 0
2 years ago
2. A student has a centrifuge tube containing 14.0 g of t-butanol and is asked to make a 1.2 m solution of ethanol/t-butanol. Ho
Vaselesa [24]

Answer:

0.774g of ethanol

0.970mL of ethanol

Explanation:

Molality is an unit of concentration defined as the ratio between moles of solute and kg of solvent.

In the problem, you need to prepare a 1.2m solution of ethanol (Solute) in t-butanol (solvent).

14.0g of butanol are <em>0.014kg </em>and as you want to prepare the 1.2m solution, you need to add:

0.014kg × (1.2moles / kg) = 0.0168 moles of solute = Moles of ethanol

To convert moles of ethanol to mass you require molar mass (Molar mass ethanol, C₂H₅OH = 46.07g/mol). Thus, mass of 0.0168 moles are:

0.0168moles Ethanol ₓ (46.07g / mol) =

<h3>0.774g of ethanol</h3>

And to convert mass in g to mL you require density of the substance (Density of ethanol = 0.798g/mL):

0.774g ₓ (1mL / 0.798g) =

<h3>0.970mL of ehtanol</h3>
8 0
2 years ago
1. How does the field of science gain knowledge and understanding?(1 point)
goblinko [34]

Answer: good luck with that F

Explanation:

8 0
2 years ago
How much carbon will turn into carbon 14 every year?<br><br> Science<br> Please help asap
saw5 [17]

Answer:

There are three naturally occurring isotopes of carbon on Earth: carbon-12, which makes up 99% of all carbon on Earth; carbon-13, which makes up 1%; and carbon-14, which occurs in trace amounts, making up about 1 or 1.5 atoms per 1012 atoms of carbon in the atmosphere.

Names: carbon-14, C-14, radiocarbon

Isotope mass: 14.003241 u

Half-life: 5,730 ± 40 years

Symbol: 14C

Explanation:

Pls give me brainliest

( ^ . ^ )

5 0
2 years ago
Alguien saber esto? Literal no se este material
Vikki [24]

Answer:

2. 389.15K , 3. 229.15K

Explanation:

K-273.15 = °C

3 0
2 years ago
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