Uh-1 Kimia X MIPA Sem-1

The correct answer is "harga materi" because the study of chemistry focuses on the structure, properties, and changes of matter, as well as the energy associated with those changes. However, the price or value of a material is not a fundamental aspect of chemistry and is not typically studied in the field.

Siswa tidak diperkenankan makan dan minum di laboratorium kimia karena dapat menyebabkan kontaminasi pada bahan-bahan kimia yang digunakan. Makanan atau minuman yang tertumpah atau tercecer dapat bereaksi dengan zat kimia dan menyebabkan bahaya bagi siswa maupun lingkungan sekitar. Selain itu, makan dan minum di laboratorium juga dapat mengganggu konsentrasi siswa dalam melakukan percobaan dan mengikuti instruksi dengan baik. Oleh karena itu, aturan tersebut ditetapkan untuk menjaga keamanan dan keselamatan siswa serta menjaga kualitas percobaan yang dilakukan.

The tool shown in the picture is used to grind or pulverize solid samples.

Kimia adalah ilmu yang mempelajari struktur materi, sifat materi, perubahan materi, dan energi yang menyertai perubahan materi. Namun, harga materi bukanlah bagian dari lingkup studi kimia. Harga materi lebih berkaitan dengan aspek ekonomi dan pasar daripada dengan sifat dan perubahan materi itu sendiri.

In a chemistry laboratory, certain activities are prohibited to ensure safety. The activities that are not allowed in the laboratory are eating and drinking (1), tasting chemicals (3), and directly inhaling gas from a cylinder (6). These activities can lead to contamination, ingestion of harmful substances, or inhalation of toxic gases, which can pose serious health risks. Therefore, it is important to strictly adhere to these rules to maintain a safe working environment in the laboratory.

The correct answer is "langsung pakai saja" because it goes against the safety measures mentioned in the other options. The other options suggest precautions such as keeping the equipment away from water sparks, regularly checking the cable installation, and checking the power before using the equipment. However, "langsung pakai saja" implies using the equipment without taking any of these safety measures into consideration.

When the hand comes into contact with a chemical liquid during a laboratory experiment, the immediate action that should be taken is to continuously rinse the affected hand with water. This is because rinsing with water helps to dilute and remove the chemical from the skin, reducing the risk of further damage or injury. Applying toothpaste, drinking milk, wiping with tissue, or applying cooking oil are not appropriate actions in this situation and may not effectively neutralize or remove the chemical.

Kimia Farmasi adalah ilmu yang fokus pada penelitian dan pengembangan bahan-bahan yang mengandung obat. Ilmu ini membahas tentang sintesis, analisis, dan evaluasi obat-obatan serta pengaruhnya terhadap tubuh manusia. Dalam kimia farmasi, para ahli berusaha untuk menciptakan obat-obatan yang efektif dan aman untuk digunakan dalam pengobatan penyakit.

The correct answer is "gelas erlenmeyer" because the item depicted in the picture resembles an erlenmeyer flask. The distinctive conical shape with a narrow neck and wide base is characteristic of an erlenmeyer flask, which is commonly used in chemistry laboratories for mixing, heating, and storing liquids. The other options, such as beaker glass, biuret, and statif, do not accurately match the shape or function of the item in the picture.

James Chadwick menemukan partikel atom yang tidak bermuatan yang disebut neutron. Neutron tidak memiliki muatan listrik, sedangkan proton memiliki muatan positif dan elektron memiliki muatan negatif. Nukleon adalah istilah yang digunakan untuk merujuk pada proton dan neutron secara keseluruhan dalam inti atom. Positron adalah partikel subatomik dengan muatan positif yang merupakan antipartikel dari elektron.

The given correct answer suggests that one should not store all the tools and chemicals in the same place. This is because storing all the tools and chemicals in the same place can increase the risk of accidents or chemical reactions. It is important to separate hazardous materials from non-hazardous ones to ensure safety in the laboratory.

James Chadwick menemukan partikel atom yang tidak bermuatan yang disebut neutron. Neutron memiliki massa yang hampir sama dengan proton tetapi tidak memiliki muatan listrik. Temuan ini penting dalam memahami struktur atom dan membantu menjelaskan stabilitas inti atom.

The correct answer is "bahan yang dapat menyebabkan iritasi, gatal-gatal, dan dapat menyebabkan luka bakar pada kulit". The image on the bottle indicates that the contents of the bottle can cause irritation, itching, and burns on the skin. This means that the substance is potentially harmful and should be handled with caution to avoid any adverse effects on the skin.

The given statement suggests that the tool mentioned is commonly used for transferring small volumes of solution without precise measurements. Among the options provided, the pipet tetes is the most suitable tool for this purpose. It is designed to deliver small, precise volumes of liquid, making it ideal for transferring solutions in small quantities without the need for accurate measurements. The other options, such as gelas ukur, buret, and pipet gondok, are more suitable for measuring larger volumes of liquid or for precise titrations. The penjepit tabung reaksi is a clamp used for holding test tubes, which is not relevant to the given statement.

The correct order of the steps in the scientific method is as follows: (4) formulating the problem, (5) making observations, (2) formulating a hypothesis, (1) conducting experiments, (3) analyzing experimental data, and (6) drawing conclusions. In this case, the correct answer is 4, 5, 2, 1, 3, 6, as it follows the correct sequence of the steps in the scientific method.

The circuit depicted in the image is used in the process of distillation. Distillation is a technique used to separate two or more substances based on their boiling points. In this process, a liquid mixture is heated to vaporize the more volatile component, and then the vapor is condensed back into a liquid form. The circuit shown in the image likely includes components such as a heating element, a condenser, and a collection vessel, all of which are essential for the distillation process.

The correct answer is 1, 3, 4. These three attitudes align with the scientific approach. Being honest (1) is important in conducting research and reporting results accurately. Having a high level of enthusiasm and curiosity (3) is essential for exploring new ideas and seeking knowledge. Being open to new ideas (4) allows scientists to consider different perspectives and adapt their theories based on new evidence.

The correct answer is Thomson. Thomson proposed the "plum pudding" model of the atom, which suggests that the atom is a solid positively charged sphere with negatively charged electrons scattered throughout. This model was based on his experiments with cathode rays, which led him to conclude that atoms contain negatively charged particles.

Tabung reaksi adalah alat yang biasa digunakan untuk tempat melakukan reaksi kimia dalam jumlah yang kecil agar mudah diamati. Erlenmeyer, gelas kimia, dan gelas ukur juga merupakan alat-alat yang digunakan dalam laboratorium kimia, tetapi tabung reaksi lebih sering digunakan untuk reaksi dalam jumlah kecil dan pengamatan yang lebih detail. Pipet tetes digunakan untuk mengambil dan mengeluarkan cairan dalam jumlah yang sangat kecil, tetapi tidak digunakan sebagai wadah untuk reaksi kimia.

Setelah selesai digunakan, lampu spiritus dapat kita padamkan dengan cara ditutup dengan penutup lampu spiritus. Ini karena penutup lampu spiritus akan mencegah oksigen masuk ke dalam lampu dan menghentikan proses pembakaran. Dengan menutup lampu spiritus, kita dapat memastikan bahwa api padam dan tidak ada risiko kebakaran yang terjadi.

Rutherford proposed the theory of the atom consisting of a small, positively charged nucleus surrounded by negatively charged electrons. This theory is known as the nuclear model of the atom. Rutherford's experiments, such as the gold foil experiment, led to the discovery of the nucleus and provided evidence for the existence of a small, dense, positively charged center in the atom. Dalton, Thomson, Planck, and Heisenberg made significant contributions to the understanding of the atom, but it was Rutherford who specifically proposed the nuclear model.

The correct answer is "kesalahan paralaks". Kesalahan paralaks refers to the error that occurs when there is a distance between the pointer and the scale lines, and the observer's eye position is not perpendicular to the pointer. This error can lead to inaccurate readings or measurements.

Fotosintesa merupakan perubahan kimia karena melibatkan reaksi kimia di dalam sel tumbuhan. Proses ini menggunakan energi matahari untuk mengubah karbon dioksida dan air menjadi glukosa dan oksigen. Jadi, fotosintesa adalah satu-satunya opsi yang merupakan perubahan kimia dalam daftar tersebut.

The correct answer is "pengoksidasi". This is because the image on the bottle indicates that the chemical inside is an oxidizer. Oxidizers are substances that can cause or contribute to the combustion of other materials, but they are not necessarily flammable themselves.